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Leptonica
1.73
Image processing and image analysis suite
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Leptonica
1.73
Image processing and image analysis suite
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#include <string.h>#include "allheaders.h"Go to the source code of this file.
Data Structures | |
| struct | PixMemoryManager |
Functions | |
| static void | pixFree (PIX *pix) |
| static void * | pix_malloc (size_t size) |
| static void | pix_free (void *ptr) |
| void | setPixMemoryManager (alloc_fn allocator, dealloc_fn deallocator) |
| PIX * | pixCreate (l_int32 width, l_int32 height, l_int32 depth) |
| PIX * | pixCreateNoInit (l_int32 width, l_int32 height, l_int32 depth) |
| PIX * | pixCreateTemplate (PIX *pixs) |
| PIX * | pixCreateTemplateNoInit (PIX *pixs) |
| PIX * | pixCreateHeader (l_int32 width, l_int32 height, l_int32 depth) |
| PIX * | pixClone (PIX *pixs) |
| void | pixDestroy (PIX **ppix) |
| PIX * | pixCopy (PIX *pixd, PIX *pixs) |
| l_int32 | pixResizeImageData (PIX *pixd, PIX *pixs) |
| l_int32 | pixCopyColormap (PIX *pixd, PIX *pixs) |
| l_int32 | pixSizesEqual (PIX *pix1, PIX *pix2) |
| l_int32 | pixTransferAllData (PIX *pixd, PIX **ppixs, l_int32 copytext, l_int32 copyformat) |
| l_int32 | pixSwapAndDestroy (PIX **ppixd, PIX **ppixs) |
| l_int32 | pixGetWidth (PIX *pix) |
| l_int32 | pixSetWidth (PIX *pix, l_int32 width) |
| l_int32 | pixGetHeight (PIX *pix) |
| l_int32 | pixSetHeight (PIX *pix, l_int32 height) |
| l_int32 | pixGetDepth (PIX *pix) |
| l_int32 | pixSetDepth (PIX *pix, l_int32 depth) |
| l_int32 | pixGetDimensions (PIX *pix, l_int32 *pw, l_int32 *ph, l_int32 *pd) |
| l_int32 | pixSetDimensions (PIX *pix, l_int32 w, l_int32 h, l_int32 d) |
| l_int32 | pixCopyDimensions (PIX *pixd, PIX *pixs) |
| l_int32 | pixGetSpp (PIX *pix) |
| l_int32 | pixSetSpp (PIX *pix, l_int32 spp) |
| l_int32 | pixCopySpp (PIX *pixd, PIX *pixs) |
| l_int32 | pixGetWpl (PIX *pix) |
| l_int32 | pixSetWpl (PIX *pix, l_int32 wpl) |
| l_int32 | pixGetRefcount (PIX *pix) |
| l_int32 | pixChangeRefcount (PIX *pix, l_int32 delta) |
| l_int32 | pixGetXRes (PIX *pix) |
| l_int32 | pixSetXRes (PIX *pix, l_int32 res) |
| l_int32 | pixGetYRes (PIX *pix) |
| l_int32 | pixSetYRes (PIX *pix, l_int32 res) |
| l_int32 | pixGetResolution (PIX *pix, l_int32 *pxres, l_int32 *pyres) |
| l_int32 | pixSetResolution (PIX *pix, l_int32 xres, l_int32 yres) |
| l_int32 | pixCopyResolution (PIX *pixd, PIX *pixs) |
| l_int32 | pixScaleResolution (PIX *pix, l_float32 xscale, l_float32 yscale) |
| l_int32 | pixGetInputFormat (PIX *pix) |
| l_int32 | pixSetInputFormat (PIX *pix, l_int32 informat) |
| l_int32 | pixCopyInputFormat (PIX *pixd, PIX *pixs) |
| l_int32 | pixSetSpecial (PIX *pix, l_int32 special) |
| char * | pixGetText (PIX *pix) |
| l_int32 | pixSetText (PIX *pix, const char *textstring) |
| l_int32 | pixAddText (PIX *pix, const char *textstring) |
| l_int32 | pixCopyText (PIX *pixd, PIX *pixs) |
| PIXCMAP * | pixGetColormap (PIX *pix) |
| l_int32 | pixSetColormap (PIX *pix, PIXCMAP *colormap) |
| l_int32 | pixDestroyColormap (PIX *pix) |
| l_uint32 * | pixGetData (PIX *pix) |
| l_int32 | pixSetData (PIX *pix, l_uint32 *data) |
| l_uint32 * | pixExtractData (PIX *pixs) |
| l_int32 | pixFreeData (PIX *pix) |
| void ** | pixGetLinePtrs (PIX *pix, l_int32 *psize) |
| l_int32 | pixPrintStreamInfo (FILE *fp, PIX *pix, const char *text) |
Variables | |
| static struct PixMemoryManager | pix_mem_manager |
| const char * | ImageFileFormatExtensions [] |
The pixN.c {N = 1,2,3,4,5} files are sorted by the type of operation.
The primary functions in these files are:
pix1.c: constructors, destructors and field accessors
pix2.c: pixel poking of image, pad and border pixels
pix3.c: masking and logical ops, counting, mirrored tiling
pix4.c: histograms, statistics, fg/bg estimation
pix5.c: property measurements, rectangle extraction
This file has the basic constructors, destructors and field accessors
Pix memory management (allows custom allocator and deallocator) static void *pix_malloc() static void pix_free() void setPixMemoryManager()
Pix creation PIX *pixCreate() PIX *pixCreateNoInit() PIX *pixCreateTemplate() PIX *pixCreateTemplateNoInit() PIX *pixCreateHeader() PIX *pixClone()
Pix destruction void pixDestroy() static void pixFree()
Pix copy PIX *pixCopy() l_int32 pixResizeImageData() l_int32 pixCopyColormap() l_int32 pixSizesEqual() l_int32 pixTransferAllData() l_int32 pixSwapAndDestroy()
Pix accessors l_int32 pixGetWidth() l_int32 pixSetWidth() l_int32 pixGetHeight() l_int32 pixSetHeight() l_int32 pixGetDepth() l_int32 pixSetDepth() l_int32 pixGetDimensions() l_int32 pixSetDimensions() l_int32 pixCopyDimensions() l_int32 pixGetSpp() l_int32 pixSetSpp() l_int32 pixCopySpp() l_int32 pixGetWpl() l_int32 pixSetWpl() l_int32 pixGetRefcount() l_int32 pixChangeRefcount() l_uint32 pixGetXRes() l_int32 pixSetXRes() l_uint32 pixGetYRes() l_int32 pixSetYRes() l_int32 pixGetResolution() l_int32 pixSetResolution() l_int32 pixCopyResolution() l_int32 pixScaleResolution() l_int32 pixGetInputFormat() l_int32 pixSetInputFormat() l_int32 pixCopyInputFormat() l_int32 pixSetSpecial() char *pixGetText() l_int32 pixSetText() l_int32 pixAddText() l_int32 pixCopyText() PIXCMAP *pixGetColormap() l_int32 pixSetColormap() l_int32 pixDestroyColormap() l_uint32 *pixGetData() l_int32 pixSetData() l_uint32 *pixExtractData() l_int32 pixFreeData()
Pix line ptrs void **pixGetLinePtrs()
Pix debug l_int32 pixPrintStreamInfo()
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Important notes on direct management of pix image data
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Custom allocator and deallocator
At the lowest level, you can specify the function that does the allocation and deallocation of the data field in the pix. By default, this is malloc and free. However, by calling setPixMemoryManager(), custom functions can be substituted. When using this, keep two things in mind:
(1) Call setPixMemoryManager() before any pix have been allocated (2) Destroy all pix as usual, in order to prevent leaks.
In pixalloc.c, we provide an example custom allocator and deallocator. To use it, you must call pmsCreate() before any pix have been allocated and pmsDestroy() at the end after all pix have been destroyed.
Direct manipulation of the pix data field
Memory management of the (image) data field in the pix is handled differently from that in the colormap or text fields. For colormap and text, the functions pixSetColormap() and pixSetText() remove the existing heap data and insert the new data. For the image data, pixSetData() just reassigns the data field; any existing data will be lost if there isn't another handle for it.
Why is pixSetData() limited in this way? Because the image data can be very large, we need flexible ways to handle it, particularly when you want to re-use the data in a different context without making a copy. Here are some different things you might want to do:
(1) Use pixCopy(pixd, pixs) where pixd is not the same size
as pixs. This will remove the data in pixd, allocate a
new data field in pixd, and copy the data from pixs, leaving
pixs unchanged. (2) Use pixTransferAllData(pixd, &pixs, ...) to transfer the
data from pixs to pixd without making a copy of it. If
pixs is not cloned, this will do the transfer and destroy pixs.
But if the refcount of pixs is greater than 1, it just copies
the data and decrements the ref count. (3) Use pixSwapAndDestroy(pixd, &pixs) to replace pixs by an
existing pixd. This is similar to pixTransferAllData(), but
simpler, in that it never makes any copies and if pixs is
cloned, the other references are not changed by this operation.(4) Use pixExtractData() to extract the image data from the pix without copying if possible. This could be used, for example, to convert from a pix to some other data structure with minimal heap allocation. After the data is extracated, the pixels can be munged and used in another context. However, the danger here is that the pix might have a refcount > 1, in which case a copy of the data must be made and the input pix left unchanged. If there are no clones, the image data can be extracted without a copy, and the data ptr in the pix must be nulled before destroying it because the pix will no longer 'own' the data.
We have provided accessors and functions here that should be sufficient so that you can do anything you want without explicitly referencing any of the pix member fields.
However, to avoid memory smashes and leaks when doing special operations on the pix data field, look carefully at the behavior of the image data accessors and keep in mind that when you invoke pixDestroy(), the pix considers itself the owner of all its heap data.
Definition in file pix1.c.
| l_int32 pixAddText | ( | PIX * | pix, |
| const char * | textstring | ||
| ) |
| [in] | pix | |
| [in] | textstring |
Notes:
(1) This adds the new textstring to any existing text.
(2) Either or both the existing text and the new text
string can be null.
Definition at line 1494 of file pix1.c.
References pixGetText(), stringJoin(), stringReplace(), and Pix::text.
| [in] | pixs |
Notes:
(1) A "clone" is simply a handle (ptr) to an existing pix.
It is implemented because (a) images can be large and
hence expensive to copy, and (b) extra handles to a data
structure need to be made with a simple policy to avoid
both double frees and memory leaks. Pix are reference
counted. The side effect of pixClone() is an increase
by 1 in the ref count.
(2) The protocol to be used is:
(a) Whenever you want a new handle to an existing image,
call pixClone(), which just bumps a ref count.
(b) Always call pixDestroy() on all handles. This
decrements the ref count, nulls the handle, and
only destroys the pix when pixDestroy() has been
called on all handles.
Definition at line 517 of file pix1.c.
Referenced by bilateralCreate(), dewarpaApplyDisparity(), dewarpFindVertDisparity(), dewarpShowResults(), ioFormatTest(), pixaAddPix(), pixaAddPixWithText(), pixaConvertToNUpPixa(), pixaConvertToPdfData(), pixAddBorder(), pixaDisplayTiledAndScaled(), pixaDisplayTiledByIndex(), pixaDisplayTiledInColumns(), pixaDisplayTiledInRows(), pixaDisplayTiledWithText(), pixAffineSequential(), pixaGetPix(), pixCompareGrayByHisto(), pixComparePhotoRegionsByHisto(), pixCropToSize(), pixDecideIfTable(), pixEndianByteSwapNew(), pixEndianTwoByteSwapNew(), pixRemoveBorder(), pixRemoveBorderToSize(), pixSwapAndDestroy(), pixTilingCreate(), pixTilingGetTile(), pixWarpStereoscopic(), recogCreateDid(), recogModifyTemplate(), recogProcessLabeled(), recogShowMatch(), recogTrainingFinished(), and saConvertFilesToPdfData().
| [in] | pixd | [optional]; can be null, or equal to pixs, or different from pixs |
| [in] | pixs |
Notes:
(1) There are three cases:
(a) pixd == null (makes a new pix; refcount = 1)
(b) pixd == pixs (no-op)
(c) pixd != pixs (data copy; no change in refcount)
If the refcount of pixd > 1, case (c) will side-effect
these handles.
(2) The general pattern of use is:
pixd = pixCopy(pixd, pixs);
This will work for all three cases.
For clarity when the case is known, you can use:
(a) pixd = pixCopy(NULL, pixs);
(c) pixCopy(pixd, pixs);
(3) For case (c), we check if pixs and pixd are the same
size (w,h,d). If so, the data is copied directly.
Otherwise, the data is reallocated to the correct size
and the copy proceeds. The refcount of pixd is unchanged.
(4) This operation, like all others that may involve a pre-existing
pixd, will side-effect any existing clones of pixd.
Definition at line 630 of file pix1.c.
Referenced by dewarpSinglePageRun(), pixaAddPix(), pixAddSingleTextblock(), pixAddTextlines(), pixAffineSequential(), pixaGetPix(), pixaInitFull(), pixBlendBoxaRandom(), pixBlockconv(), pixBlockconvGray(), pixBlockconvGrayTile(), pixBlockconvGrayUnnormalized(), pixBlockconvTiled(), pixBlockrank(), pixBlocksum(), pixContrastTRC(), pixDrawBoxa(), pixDrawBoxaRandom(), pixExpandBinaryPower2(), pixExpandBinaryReplicate(), pixExpandReplicate(), pixFlipLR(), pixFlipTB(), pixInvert(), pixModifyBrightness(), pixModifySaturation(), pixPaintBoxa(), pixPaintBoxaRandom(), pixQuadraticVShear(), pixQuadraticVShearSampled(), pixResizeToMatch(), pixRotateOrth(), pixScaleByIntSampling(), pixScaleBySampling(), pixScaleToSizeRel(), pixSelectByAreaFraction(), pixSelectByPerimSizeRatio(), pixSelectByPerimToAreaRatio(), pixSelectBySize(), pixSelectByWidthHeightRatio(), pixSetBlackOrWhiteBoxa(), pixTranslate(), pixWriteMemBmp(), recogModifyTemplate(), recogShowMatch(), wshedRenderColors(), and wshedRenderFill().
| [in] | pixd,pixs | dest and src Pix |
Notes:
(1) This always destroys any colormap in pixd (except if
the operation is a no-op.
Definition at line 735 of file pix1.c.
References pixDestroyColormap().
Referenced by pixaDisplayUnsplit(), pixaSplitPix(), pixExpandReplicate(), and pixRotate90().
| [in] | pixd | |
| [in] | pixd |
| [in] | pixd | |
| [in] | pixs |
Definition at line 1172 of file pix1.c.
Referenced by pixCreateTemplateNoInit(), and pixMirroredTiling().
| PIX* pixCreate | ( | l_int32 | width, |
| l_int32 | height, | ||
| l_int32 | depth | ||
| ) |
| [in] | width,height,depth |
Definition at line 302 of file pix1.c.
References Pix::data, Pix::h, pixCreateNoInit(), and Pix::wpl.
Referenced by boxaCombineOverlaps(), boxaCombineOverlapsInPair(), boxaCompareRegions(), boxaDisplayTiled(), boxaGetCoverage(), ccbaDisplayBorder(), ccbaDisplayImage1(), ccbaDisplayImage2(), ccbaDisplaySPBorder(), displayHSVColorRange(), dpixConvertToPix(), fpixaConvertLABToRGB(), fpixaConvertXYZToRGB(), fpixConvertToPix(), fpixDisplayMaxDynamicRange(), fpixRenderContours(), fpixThresholdToPix(), kernelDisplayInPix(), pixaAccumulateSamples(), pixaaDisplayByPixa(), pixaccCreate(), pixaComparePhotoRegionsByHisto(), pixaCreateFromPix(), pixaDisplay(), pixaDisplayOnColor(), pixaDisplayRandomCmap(), pixaDisplayTiled(), pixaDisplayTiledAndScaled(), pixaDisplayTiledInRows(), pixaDisplayUnsplit(), pixaGetAlignedStats(), pixaInitFull(), pixaSplitPix(), pixBlockconvAccum(), pixBlockconvGrayUnnormalized(), pixClipRectangle(), pixCreateRGBImage(), pixCropToSize(), pixDisplayColorArray(), pixDisplayDiffBinary(), pixDitherTo2bppSpec(), pixDitherToBinarySpec(), pixExpandReplicate(), pixFindLargestRectangle(), pixGenerateFromPta(), pixGenerateMaskByBand32(), pixGenerateMaskByDiscr32(), pixInitAccumulate(), pixMakeFrameMask(), pixMakeMaskFromLUT(), pixMakeMaskFromVal(), pixMirroredTiling(), pixPadToCenterCentroid(), pixReadFromTiffStream(), pixReadStreamJpeg(), pixReadStreamPnm(), pixRenderPolygon(), pixResizeToMatch(), pixRotate90(), pixSearchBinaryMaze(), pixSearchGrayMaze(), pixThresholdGrayArb(), pixThresholdTo2bpp(), pixThresholdTo4bpp(), pixThresholdToBinary(), pixVarThresholdToBinary(), pixWarpStereoscopic(), recogGetWindowedArea(), recogMakeDecodingArray(), recogShowAverageTemplates(), selaAddCrossJunctions(), selaAddTJunctions(), and selDisplayInPix().
| PIX* pixCreateHeader | ( | l_int32 | width, |
| l_int32 | height, | ||
| l_int32 | depth | ||
| ) |
| [in] | width,height,depth |
Notes:
(1) It is assumed that all 32 bit pix have 3 spp. If there is
a valid alpha channel, this will be set to 4 spp later.
(2) If the number of bytes to be allocated is larger than the
maximum value in an int32, we can get overflow, resulting
in a smaller amount of memory actually being allocated.
Later, an attempt to access memory that wasn't allocated will
cause a crash. So to avoid crashing a program (or worse)
with bad (or malicious) input, this is where we limit the
requested allocation of image data in a typesafe way.
Definition at line 439 of file pix1.c.
Referenced by pixCreateNoInit().
| PIX* pixCreateNoInit | ( | l_int32 | width, |
| l_int32 | height, | ||
| l_int32 | depth | ||
| ) |
| [in] | width,height,depth |
Notes:
(1) Must set pad bits to avoid reading unitialized data, because
some optimized routines (e.g., pixConnComp()) read from pad bits.
Definition at line 331 of file pix1.c.
References pixCreateHeader().
Referenced by pixAddBorderGeneral(), pixApplyVariableGrayMap(), pixConvert24To32(), pixCreate(), pixCreateTemplateNoInit(), and pixRemoveBorderGeneral().
| [in] | pixs |
Notes:
(1) Makes a Pix of the same size as the input Pix, with the
data array allocated and initialized to 0.
(2) Copies the other fields, including colormap if it exists.
Definition at line 367 of file pix1.c.
References Pix::data, Pix::h, pixCreateTemplateNoInit(), and Pix::wpl.
Referenced by bilateralApply(), ccbaDisplayImage1(), ccbaDisplayImage2(), pixAffineSampled(), pixApplyHorizDisparity(), pixApplyVertDisparity(), pixBilinearSampled(), pixBlockrank(), pixCopyBorder(), pixMorphSequenceByComponent(), pixProjectiveSampled(), pixQuadraticVShearSampled(), pixSelectByAreaFraction(), pixSelectByPerimSizeRatio(), pixSelectByPerimToAreaRatio(), pixSelectBySize(), pixSelectByWidthHeightRatio(), pixSobelEdgeFilter(), pixStretchHorizontalLI(), pixStretchHorizontalSampled(), and pixTwoSidedEdgeFilter().
| [in] | pixs |
Notes:
(1) Makes a Pix of the same size as the input Pix, with
the data array allocated but not initialized to 0.
(2) Copies the other fields, including colormap if it exists.
Definition at line 397 of file pix1.c.
References pixCopySpp(), pixCreateNoInit(), and pixGetDimensions().
Referenced by pixCreateTemplate().
| void pixDestroy | ( | PIX ** | ppix | ) |
| [in,out] | ppix | will be nulled |
Notes:
(1) Decrements the ref count and, if 0, destroys the pix.
(2) Always nulls the input ptr.
Definition at line 545 of file pix1.c.
References pixFree().
Referenced by bilateralCreate(), bilateralDestroy(), boxaCombineOverlaps(), boxaCompareRegions(), boxaDisplayTiled(), boxaGetCoverage(), ccbaDestroy(), ccbaDisplayImage1(), ccbaDisplayImage2(), ccbDestroy(), convertImageDataToPdf(), convertImageDataToPdfData(), convertNumberedMasksToBoxaa(), convertToPdfData(), convertToPdfDataSegmented(), convertToPdfSegmented(), dewarpaApplyDisparity(), dewarpaApplyInit(), dewarpaShowArrays(), dewarpDestroy(), dewarpMinimize(), dewarpSinglePage(), displayHSVColorRange(), fpixaDisplayQuadtree(), ioFormatTest(), kernelDisplayInPix(), l_generateFlateData(), pixaAddBorderGeneral(), pixaAddTextlines(), pixaAddTextNumber(), pixaaDisplayByPixa(), pixaccDestroy(), pixaccMultConstAccumulate(), pixaCentroids(), pixaClear(), pixaClipToForeground(), pixaClipToPix(), pixaComparePhotoRegionsByHisto(), pixaConvertTo1(), pixaConvertTo32(), pixaConvertTo8(), pixaConvertTo8Colormap(), pixaConvertToNUpPixa(), pixaConvertToPdfData(), pixaConvertToSameDepth(), pixaCountText(), pixaCreateFromPix(), pixAddWithIndicator(), pixaDestroy(), pixaDisplayOnColor(), pixaDisplayTiled(), pixaDisplayTiledAndScaled(), pixaDisplayTiledByIndex(), pixaDisplayTiledInRows(), pixaDisplayTiledWithText(), pixaDisplayUnsplit(), pixaEqual(), pixAffineSequential(), pixaFindAreaFraction(), pixaFindDimensions(), pixaFindPerimSizeRatio(), pixaFindPerimToAreaRatio(), pixaFindStrokeWidth(), pixaFindWidthHeightProduct(), pixaFindWidthHeightRatio(), pixaGetAlignedStats(), pixaGetLinePtrs(), pixaGetPixDimensions(), pixaIsFull(), pixaModifyStrokeWidth(), pixaMorphSequenceByComponent(), pixaRemovePix(), pixaRemovePixAndSave(), pixaReplacePix(), pixaRotateOrth(), pixaScaleToSizeRel(), pixaSelectByNumConnComp(), pixaSetFullSizeBoxa(), pixaSetStrokeWidth(), pixaSetText(), pixaSplitIntoFiles(), pixaThinConnected(), pixaWriteStream(), pixBlockconvGrayUnnormalized(), pixBlockrank(), pixClose(), pixCloseGeneralized(), pixCompareGrayByHisto(), pixComparePhotoRegionsByHisto(), pixCompareWithTranslation(), pixConvertTo1BySampling(), pixConvertTo32BySampling(), pixConvertTo8BySampling(), pixCorrelationBinary(), pixCropAlignedToCentroid(), pixDecideIfTable(), pixDecideIfText(), pixDilate(), pixDisplayColorArray(), pixDisplayDiffBinary(), pixDisplayOutliers(), pixDisplayPtaa(), pixFindStrokeLength(), pixGetGrayHistogramTiled(), pixGetOuterBorder(), pixHMT(), pixMirroredTiling(), pixMorphSequenceByComponent(), pixOpen(), pixOpenGeneralized(), pixReadBarcodes(), pixReadStreamJpeg(), pixRemoveWithIndicator(), pixRenderHorizEndPoints(), pixSimpleCaptcha(), pixSwapAndDestroy(), pixThresholdForFgBg(), pixTilingDestroy(), pixTilingGetTile(), pixWarpStereoscopic(), pixWriteStreamPS(), recogAddCharstrLabels(), recogAddDigitPadTemplates(), recogAverageSamples(), recogCreateFromPixaNoFinish(), recogDebugAverages(), recogDestroy(), recogDestroyDid(), recogDisplayOutlier(), recogGetWindowedArea(), recogIdentifyPixa(), recogMakeBootDigitTemplates(), recogMakeDecodingArray(), recogModifyTemplate(), recogRescoreDidResult(), recogShowAverageTemplates(), recogShowMatch(), recogShowMatchesInRange(), recogShowPath(), recogTrainFromBoot(), recogTrainingFinished(), recogTrainLabeled(), saConvertFilesToPdfData(), selaAddCrossJunctions(), selaAddTJunctions(), selaDisplayInPix(), selReadFromColorImage(), showExtractNumbers(), wshedDestroy(), wshedRenderColors(), and wshedRenderFill().
| l_int32 pixDestroyColormap | ( | PIX * | pix | ) |
| [in] | pix |
Definition at line 1577 of file pix1.c.
References Pix::colormap, and pixcmapDestroy().
Referenced by pixCopyColormap(), and pixSetColormap().
| l_uint32* pixExtractData | ( | PIX * | pixs | ) |
Notes: (1) This extracts the pix image data for use in another context. The caller still needs to use pixDestroy() on the input pix. (2) If refcount == 1, the data is extracted and the pix->data ptr is set to NULL. (3) If refcount > 1, this simply returns a copy of the data, using the pix allocator, and leaving the input pix unchanged.
|
static |
| [in] | pix |
Notes:
(1) Decrements the ref count and, if 0, destroys the pix.
Definition at line 576 of file pix1.c.
Referenced by pixDestroy().
| l_int32 pixFreeData | ( | PIX * | pix | ) |
Notes: (1) This frees the data and sets the pix data ptr to null. It should be used before pixSetData() in the situation where you want to free any existing data before doing a subsequent assignment with pixSetData().
Definition at line 1681 of file pix1.c.
References pixGetData().
| l_uint32* pixGetData | ( | PIX * | pix | ) |
Notes: (1) This gives a new handle for the data. The data is still owned by the pix, so do not call LEPT_FREE() on it.
Definition at line 1602 of file pix1.c.
References Pix::data.
Referenced by bilateralApply(), bilateralCreate(), dpixConvertToPix(), fpixConvertToPix(), fpixDisplayMaxDynamicRange(), fpixRenderContours(), fpixThresholdToPix(), makeGrayQuantColormapArb(), pixaComparePhotoRegionsByHisto(), pixAddConstantGray(), pixAffineColor(), pixApplyHorizDisparity(), pixApplyVertDisparity(), pixBilinearColor(), pixBlockconvAccum(), pixCentroid(), pixConvert24To32(), pixConvert32To24(), pixEndianByteSwap(), pixEndianByteSwapNew(), pixEndianTwoByteSwap(), pixEndianTwoByteSwapNew(), pixFindLargestRectangle(), pixFlipLR(), pixFlipPixel(), pixFlipTB(), pixFreeData(), pixGetBinnedColor(), pixGetColorRegion(), pixGetOuterBorder(), pixGetRasterData(), pixMeasureSaturation(), pixModifyBrightness(), pixModifySaturation(), pixMultConstantGray(), pixNumberOccupiedOctcubes(), pixNumColors(), pixProjectiveColor(), pixQuadraticVShearSampled(), pixRasteropHip(), pixRasteropVip(), pixSetBorderVal(), pixSetLowContrast(), pixSetPadBits(), pixSetPadBitsBand(), pixSetPixel(), pixSobelEdgeFilter(), pixStretchHorizontalLI(), pixStretchHorizontalSampled(), and pixTwoSidedEdgeFilter().
| l_int32 pixGetDimensions | ( | PIX * | pix, |
| l_int32 * | pw, | ||
| l_int32 * | ph, | ||
| l_int32 * | pd | ||
| ) |
| [in] | pix | |
| [out] | pw,ph,pd | [optional] each can be null |
Definition at line 1052 of file pix1.c.
References Pix::d, Pix::h, and Pix::w.
Referenced by bilateralCreate(), boxaaDisplay(), dewarpPopulateFullRes(), identifyWatershedBasin(), ioFormatTest(), kernelCreateFromPix(), localSearchForBackground(), makeGrayQuantColormapArb(), nextOnPixelInRaster(), pixaaDisplayByPixa(), pixaccCreateFromPix(), pixaccMultConstAccumulate(), pixaCreateFromBoxa(), pixaCreateFromPix(), pixAddBorderGeneral(), pixAddConstantGray(), pixAddContinuedBorder(), pixAddMirroredBorder(), pixAddMixedBorder(), pixAddRepeatedBorder(), pixAddRGB(), pixAddSingleTextblock(), pixAddTextlines(), pixaDisplayTiledAndScaled(), pixaDisplayTiledByIndex(), pixAffineColor(), pixAffineGray(), pixAffinePtaWithAlpha(), pixAffineSampled(), pixaFindDimensions(), pixaFindWidthHeightProduct(), pixaFindWidthHeightRatio(), pixaGetPixDimensions(), pixApplyHorizDisparity(), pixApplyVariableGrayMap(), pixApplyVertDisparity(), pixaRotateOrth(), pixaSetFullSizeBoxa(), pixaSplitPix(), pixAverageByColumn(), pixAverageByRow(), pixAverageInRect(), pixAverageOnLine(), pixaWriteStreamInfo(), pixBilinearColor(), pixBilinearGray(), pixBilinearPtaWithAlpha(), pixBilinearSampled(), pixBlendWithGrayMask(), pixBlockconv(), pixBlockconvAccum(), pixBlockconvGray(), pixBlockconvGrayTile(), pixBlockconvGrayUnnormalized(), pixBlockconvTiled(), pixBlockrank(), pixBlocksum(), pixCentroid(), pixClearPixel(), pixClipRectangle(), pixColorContent(), pixColorMagnitude(), pixCombineMasked(), pixCombineMaskedGeneral(), pixCompareGrayByHisto(), pixComparePhotoRegionsByHisto(), pixConvert24To32(), pixConvert32To24(), pixConvert8To16(), pixConvertRGBToGraySatBoost(), pixConvertRGBToHue(), pixConvertRGBToSaturation(), pixConvertRGBToValue(), pixCopyBorder(), pixCreateFromPixcomp(), pixCreateRGBImage(), pixCreateTemplateNoInit(), pixCropAlignedToCentroid(), pixCropToMatch(), pixCropToSize(), pixDilate(), pixDisplayDiffBinary(), pixDisplayPtaa(), pixDitherTo2bppSpec(), pixDitherToBinarySpec(), pixEqualWithAlpha(), pixErode(), pixExpandBinaryPower2(), pixExpandBinaryReplicate(), pixExpandReplicate(), pixExtractOnLine(), pixFindHorizontalRuns(), pixFindLargestRectangle(), pixFindPageForeground(), pixFindVerticalRuns(), pixFlipLR(), pixFlipPixel(), pixFlipTB(), pixGenerateFlateData(), pixGenerateMaskByBand32(), pixGenerateMaskByDiscr32(), pixGetAverageTiled(), pixGetBinnedColor(), pixGetColorHistogram(), pixGetColorHistogramMasked(), pixGetColorRegion(), pixGetOuterBorder(), pixGetPixel(), pixGetRandomPixel(), pixGetRasterData(), pixGetRGBPixel(), pixHMT(), pixHShearLI(), pixMakeMaskFromLUT(), pixMakeMaskFromVal(), pixMaskOverColorPixels(), pixMaskOverColorRange(), pixMaxDynamicRange(), pixMeasureSaturation(), pixMinMaxNearLine(), pixMirroredTiling(), pixModifyBrightness(), pixModifySaturation(), pixMultConstantColor(), pixMultConstantGray(), pixMultMatrixColor(), pixNumberOccupiedOctcubes(), pixNumColors(), pixPadToCenterCentroid(), pixPrepare1bpp(), pixProjectiveColor(), pixProjectiveGray(), pixProjectivePtaWithAlpha(), pixProjectiveSampled(), pixQuadraticVShear(), pixQuadraticVShearLI(), pixQuadraticVShearSampled(), pixRandomHarmonicWarp(), pixRasteropHip(), pixRasteropIP(), pixRasteropVip(), pixRemoveBorderGeneral(), pixRemoveBorderToSize(), pixRenderGridArb(), pixRenderPlotFromNuma(), pixResizeImageData(), pixResizeToMatch(), pixRotate90(), pixRotateBySampling(), pixRotateWithAlpha(), pixScaleAreaMapToSize(), pixScaleBySamplingToSize(), pixScaleSmoothToSize(), pixScaleToSize(), pixScaleToSizeRel(), pixScaleWithAlpha(), pixSearchBinaryMaze(), pixSearchGrayMaze(), pixSelectByAreaFraction(), pixSelectByPerimSizeRatio(), pixSelectByPerimToAreaRatio(), pixSelectBySize(), pixSelectByWidthHeightRatio(), pixSerializeToMemory(), pixSetBorderRingVal(), pixSetBorderVal(), pixSetInRectArbitrary(), pixSetLowContrast(), pixSetMirroredBorder(), pixSetOrClearBorder(), pixSetPadBits(), pixSetPadBitsBand(), pixSetPixel(), pixSetRGBPixel(), pixSetTextblock(), pixSobelEdgeFilter(), pixStretchHorizontalLI(), pixStretchHorizontalSampled(), pixThresholdGrayArb(), pixThresholdTo2bpp(), pixThresholdTo4bpp(), pixThresholdToBinary(), pixTilingCreate(), pixTilingGetTile(), pixTilingPaintTile(), pixTwoSidedEdgeFilter(), pixUnsharpMaskingGray(), pixUnsharpMaskingGray1D(), pixUnsharpMaskingGray2D(), pixVarianceByColumn(), pixVarianceByRow(), pixVarianceInRect(), pixVarThresholdToBinary(), pixVShearLI(), pixWarpStereoscopic(), pixWriteMemBmp(), pixWriteStreamAsciiPnm(), pixWriteStreamJpeg(), pixWriteStreamPam(), pixWriteStreamPnm(), pixWriteStringPS(), pixWriteToTiffStream(), ptaGetNeighborPixLocs(), recogGetWindowedArea(), recogMakeDecodingArray(), recogModifyTemplate(), regTestCompareSimilarPix(), selaDisplayInPix(), selCreateFromPix(), selectDefaultPdfEncoding(), wshedApply(), and wshedRenderColors().
| void** pixGetLinePtrs | ( | PIX * | pix, |
| l_int32 * | psize | ||
| ) |
| [in] | pix | |
| [out] | psize | [optional] array size, which is the pix height |
Notes:
(1) This is intended to be used for fast random pixel access.
For example, for an 8 bpp image,
val = GET_DATA_BYTE(lines8[i], j);
is equivalent to, but much faster than,
pixGetPixel(pix, j, i, &val);
(2) How much faster? For 1 bpp, it's from 6 to 10x faster.
For 8 bpp, it's an amazing 30x faster. So if you are
doing random access over a substantial part of the image,
use this line ptr array.
(3) When random access is used in conjunction with a stack,
queue or heap, the overall computation time depends on
the operations performed on each struct that is popped
or pushed, and whether we are using a priority queue (O(logn))
or a queue or stack (O(1)). For example, for maze search,
the overall ratio of time for line ptrs vs. pixGet/Set* is
Maze type Type Time ratio
binary queue 0.4
gray heap (priority queue) 0.6
(4) Because this returns a void** and the accessors take void*,
the compiler cannot check the pointer types. It is
strongly recommended that you adopt a naming scheme for
the returned ptr arrays that indicates the pixel depth.
(This follows the original intent of Simonyi's "Hungarian"
application notation, where naming is used proactively
to make errors visibly obvious.) By doing this, you can
tell by inspection if the correct accessor is used.
For example, for an 8 bpp pixg:
void **lineg8 = pixGetLinePtrs(pixg, NULL);
val = GET_DATA_BYTE(lineg8[i], j); // fast access; BYTE, 8
...
LEPT_FREE(lineg8); // don't forget this
(5) These are convenient for accessing bytes sequentially in an
8 bpp grayscale image. People who write image processing code
on 8 bpp images are accustomed to grabbing pixels directly out
of the raster array. Note that for little endians, you first
need to reverse the byte order in each 32-bit word.
Here's a typical usage pattern:
pixEndianByteSwap(pix); // always safe; no-op on big-endians
l_uint8 **lineptrs = (l_uint8 **)pixGetLinePtrs(pix, NULL);
pixGetDimensions(pix, &w, &h, NULL);
for (i = 0; i < h; i++) {
l_uint8 *line = lineptrs[i];
for (j = 0; j < w; j++) {
val = line[j];
...
}
}
pixEndianByteSwap(pix); // restore big-endian order
LEPT_FREE(lineptrs);
This can be done even more simply as follows:
l_uint8 **lineptrs = pixSetupByteProcessing(pix, &w, &h);
for (i = 0; i < h; i++) {
l_uint8 *line = lineptrs[i];
for (j = 0; j < w; j++) {
val = line[j];
...
}
}
pixCleanupByteProcessing(pix, lineptrs);
Definition at line 1772 of file pix1.c.
Referenced by pixaGetLinePtrs(), pixFindLargestRectangle(), pixSearchBinaryMaze(), and pixSearchGrayMaze().
| l_int32 pixGetResolution | ( | PIX * | pix, |
| l_int32 * | pxres, | ||
| l_int32 * | pyres | ||
| ) |
| char* pixGetText | ( | PIX * | pix | ) |
| [in] | pix |
Notes:
(1) The text string belongs to the pix. The caller must
NOT free it!
Definition at line 1442 of file pix1.c.
References Pix::text.
Referenced by pixaAddPixWithText(), pixaAddTextlines(), pixaComparePhotoRegionsByHisto(), pixaCountText(), pixAddSingleTextblock(), pixAddText(), pixAddTextlines(), pixaDisplayTiledByIndex(), pixaDisplayTiledWithText(), pixDisplayOutliers(), recogAddDigitPadTemplates(), and recogCreateFromPixaNoFinish().
| l_int32 pixPrintStreamInfo | ( | FILE * | fp, |
| PIX * | pix, | ||
| const char * | text | ||
| ) |
| [in] | fp | file stream |
| [in] | pix | |
| [in] | text | [optional] identifying string; can be null |
| [in] | pixd | gets new uninitialized buffer for image data |
| [in] | pixs | determines the size of the buffer; not changed |
Notes:
(1) This removes any existing image data from pixd and
allocates an uninitialized buffer that will hold the
amount of image data that is in pixs.
Definition at line 690 of file pix1.c.
References pixGetDimensions(), and pixSizesEqual().
| [in] | pix | |
| [in] | colormap | to be assigned |
Notes:
(1) Unlike with the pix data field, pixSetColormap() destroys
any existing colormap before assigning the new one.
Because colormaps are not ref counted, it is important that
the new colormap does not belong to any other pix.
Definition at line 1556 of file pix1.c.
References Pix::colormap, and pixDestroyColormap().
Referenced by fpixRenderContours(), pixaDisplayRandomCmap(), pixDisplayDiffBinary(), and pixRenderRandomCmapPtaa().
| l_int32 pixSetData | ( | PIX * | pix, |
| l_uint32 * | data | ||
| ) |
Notes: (1) This does not free any existing data. To free existing data, use pixFreeData() before pixSetData().
Definition at line 1620 of file pix1.c.
References Pix::data.
| l_int32 pixSetDimensions | ( | PIX * | pix, |
| l_int32 | w, | ||
| l_int32 | h, | ||
| l_int32 | d | ||
| ) |
| [in] | pix | |
| [in] | w,h,d | use 0 to skip the setting for any of these |
| l_int32 pixSetResolution | ( | PIX * | pix, |
| l_int32 | xres, | ||
| l_int32 | yres | ||
| ) |
| [in] | pix | |
| [in] | xres,yres | use 0 to skip the setting for either of these |
Definition at line 1323 of file pix1.c.
References Pix::xres, and Pix::yres.
Referenced by pixaComparePhotoRegionsByHisto(), and pixCreateFromPixcomp().
| l_int32 pixSetText | ( | PIX * | pix, |
| const char * | textstring | ||
| ) |
| [in] | pix | |
| [in] | textstring | can be null |
Notes:
(1) This removes any existing textstring and puts a copy of
the input textstring there.
Definition at line 1466 of file pix1.c.
References stringReplace(), and Pix::text.
Referenced by pixaSetText(), pixCreateFromPixcomp(), pixDisplayOutliers(), recogAddCharstrLabels(), recogIdentifyPixa(), and recogTrainFromBoot().
| [in] | pix1,pix2 | two pix |
Definition at line 768 of file pix1.c.
Referenced by pixApplyVariableGrayMap(), pixCopyBorder(), pixEqualWithCmap(), pixGetPSNR(), pixResizeImageData(), pixSetLowContrast(), pixTestForSimilarity(), and pixVarThresholdToBinary().
| [out] | ppixd | [optional] input pixd can be null, and it must be different from pixs |
| [in,out] | ppixs | will be nulled after the swap |
Notes:
(1) Simple operation to change the handle name safely.
After this operation, the original image in pixd has
been destroyed, pixd points to what was pixs, and
the input pixs ptr has been nulled.
(2) This works safely whether or not pixs and pixd are cloned.
If pixs is cloned, the other handles still point to
the original image, with the ref count reduced by 1.
(3) Usage example:
Pix *pix2 = function(pix1, ...);pixSwapAndDestroy(&pix1, &pix2);pixDestroy(&pix1); // holds what was in pix2
Example with clones ([] shows ref count of image generated
by the function):
Pix *pix2 = function(pix1, ...); [1]pixSwapAndDestroy(&pix1, &pix2);pixDestroy(&pixs); // still holds read imagepixDestroy(&pix1); // holds what was in pix2 [2] --> [1]pixDestroy(&pix3); // holds what was in pix2 [1] --> [0]
Definition at line 932 of file pix1.c.
References pixClone(), and pixDestroy().
| [in] | pixd | must be different from pixs |
| [in,out] | ppixs | will be nulled if refcount goes to 0 |
| [in] | copytext | 1 to copy the text field; 0 to skip |
| [in] | copyformat | 1 to copy the informat field; 0 to skip |
Notes:
(1) This does a complete data transfer from pixs to pixd,
followed by the destruction of pixs (refcount permitting).
(2) If the refcount of pixs is 1, pixs is destroyed. Otherwise,
the data in pixs is copied (rather than transferred) to pixd.
(3) This operation, like all others with a pre-existing pixd,
will side-effect any existing clones of pixd. The pixd
refcount does not change.
(4) When might you use this? Suppose you have an in-place Pix
function (returning void) with the typical signature:
void function-inplace(PIX *pix, ...)
where "..." are non-pointer input parameters, and suppose
further that you sometimes want to return an arbitrary Pix
in place of the input Pix. There are two ways you can do this:
(a) The straightforward way is to change the function
signature to take the address of the Pix ptr:
Here, the input and returned pix are different, as viewed
by the calling function, and the inplace function is
expected to destroy the input pix to avoid a memory leak.
(b) Keep the signature the same and use pixTransferAllData()
to return the new Pix in the input Pix struct:
PIX *pixt = function-makenew(pix); pixTransferAllData(pix, &pixt, 0, 0); // pixDestroy() is called on pixt return;}
Here, the input and returned pix are the same, as viewed
by the calling function, and the inplace function must
never destroy the input pix, because the calling function
maintains an unchanged handle to it.
| void setPixMemoryManager | ( | alloc_fn | allocator, |
| dealloc_fn | deallocator | ||
| ) |
| [in] | allocator | [optional]; use NULL to skip |
| [in] | deallocator | [optional]; use NULL to skip |
Notes:
(1) Use this to change the alloc and/or dealloc functions;
e.g., setPixMemoryManager(my_malloc, my_free).
(2) The C99 standard (section 6.7.5.3, par. 8) says:
A declaration of a parameter as "function returning type"
shall be adjusted to "pointer to function returning type"
so that it can be in either of these two forms:
(a) type (function-ptr(type, ...))
(b) type ((*function-ptr)(type, ...))
because form (a) is implictly converted to form (b), as in the
definition of struct PixMemoryManager above. So, for example,
we should be able to declare either of these:
(a) void *(allocator(size_t))
(b) void *((*allocator)(size_t))
However, MSVC++ only accepts the second version.
Definition at line 282 of file pix1.c.
References pix_mem_manager.
|
static |
Default Pix memory manager
Definition at line 225 of file pix1.c.
Referenced by setPixMemoryManager().
1.8.14