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Leptonica 1.68
C Image Processing Library
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Leptonica 1.68
C Image Processing Library
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Rendering shapes from lines (using Pta representation) More...
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Rendering shapes from lines (using Pta representation)
Pta generation for arbitrary shapes built with lines PTA *generatePtaLine() PTA *generatePtaWideLine() PTA *generatePtaBox() PTA *generatePtaHashBox() PTA *generatePtaBoxa() PTAA *generatePtaaBoxa() PTAA *generatePtaaHashBoxa() PTA *generatePtaPolyline() PTA *generatePtaFilledCircle() PTA *generatePtaLineFromPt() l_int32 locatePtRadially() Pta rendering l_int32 pixRenderPta() l_int32 pixRenderPtaArb() l_int32 pixRenderPtaBlend() Rendering of arbitrary shapes built with lines l_int32 pixRenderLine() l_int32 pixRenderLineArb() l_int32 pixRenderLineBlend() l_int32 pixRenderBox() l_int32 pixRenderBoxArb() l_int32 pixRenderBoxBlend() l_int32 pixRenderHashBox() l_int32 pixRenderHashBoxArb() l_int32 pixRenderHashBoxBlend() l_int32 pixRenderBoxa() l_int32 pixRenderBoxaArb() l_int32 pixRenderBoxaBlend() l_int32 pixRenderPolyline() l_int32 pixRenderPolylineArb() l_int32 pixRenderPolylineBlend() l_int32 pixRenderRandomCmapPtaa() Contour rendering on grayscale images PIX *pixRenderContours() PIX *fpixRenderContours() The line rendering functions are relatively crude, but they get the job done for most simple situations. We use the pta as an intermediate data structure. A pta is generated for a line. One of two rendering functions are used to render this onto a Pix.
Definition in file graphics.c.
Input: x1, y1 (end point 1) x2, y2 (end point 2) Return: pta, or null on error
Definition at line 93 of file graphics.c.
References ERROR_PTR, FALSE, L_ABS, L_SIGN, NULL, PROCNAME, ptaAddPt(), ptaCreate(), TRUE, x1, and y1.
Referenced by generatePtaLineFromPt(), generatePtaWideLine(), pixExtractOnLine(), and pixGetRunsOnLine().
Input: x1, y1 (end point 1) x2, y2 (end point 2) width Return: ptaj, or null on error
Definition at line 157 of file graphics.c.
References ERROR_PTR, generatePtaLine(), L_ABS, L_WARNING, NULL, PROCNAME, ptaDestroy(), and ptaJoin().
Referenced by generatePtaBox(), generatePtaHashBox(), generatePtaPolyline(), pixRenderLine(), pixRenderLineArb(), and pixRenderLineBlend().
Input: box width (of line) Return: ptad, or null on error
Notes: (1) Because the box is constructed so that we don't have any overlapping lines, there is no need to remove duplicates.
Definition at line 228 of file graphics.c.
References boxGetGeometry(), ERROR_PTR, generatePtaWideLine(), NULL, PROCNAME, ptaCreate(), ptaDestroy(), and ptaJoin().
Referenced by generatePtaBoxa(), generatePtaHashBox(), pixRenderBox(), pixRenderBoxArb(), and pixRenderBoxBlend().
| PTA* generatePtaHashBox | ( | BOX * | box, |
| l_int32 | spacing, | ||
| l_int32 | width, | ||
| l_int32 | orient, | ||
| l_int32 | outline | ||
| ) |
Input: box spacing (spacing between lines; must be > 1) width (of line) orient (orientation of lines: L_HORIZONTAL_LINE, ...) outline (0 to skip drawing box outline) Return: ptad, or null on error
Notes: (1) The orientation takes on one of 4 orientations (horiz, vertical, slope +1, slope -1). (2) The full outline is also drawn if = 1.
Definition at line 301 of file graphics.c.
References boxGetGeometry(), boxIntersectByLine(), ERROR_PTR, generatePtaBox(), generatePtaWideLine(), L_HORIZONTAL_LINE, L_NEG_SLOPE_LINE, L_POS_SLOPE_LINE, L_VERTICAL_LINE, NULL, PROCNAME, ptaCreate(), ptaDestroy(), ptaJoin(), x1, x2, y1, and y2.
Referenced by generatePtaaHashBoxa(), pixRenderHashBox(), pixRenderHashBoxArb(), and pixRenderHashBoxBlend().
Input: boxa width removedups (1 to remove, 0 to leave) Return: ptad, or null on error
Notes: (1) If the boxa has overlapping boxes, and if blending will be used to give a transparent effect, transparency artifacts at line intersections can be removed using removedups = 1.
Definition at line 392 of file graphics.c.
References boxaGetBox(), boxaGetCount(), boxDestroy(), ERROR_PTR, generatePtaBox(), L_CLONE, NULL, PROCNAME, ptaClone(), ptaCreate(), ptaDestroy(), ptaJoin(), and ptaRemoveDuplicates().
Referenced by pixRenderBoxa(), pixRenderBoxaArb(), and pixRenderBoxaBlend().
Input: boxa Return: ptaa, or null on error
Notes: (1) This generates a pta of the four corners for each box in the boxa. (2) Each of these pta can be rendered onto a pix with random colors, by using pixRenderRandomCmapPtaa() with closeflag = 1.
Definition at line 438 of file graphics.c.
References boxaGetBox(), boxaGetCount(), boxDestroy(), boxGetGeometry(), ERROR_PTR, L_CLONE, L_INSERT, NULL, PROCNAME, ptaaAddPta(), ptaaCreate(), ptaAddPt(), and ptaCreate().
Referenced by pixDrawBoxaRandom().
| PTAA* generatePtaaHashBoxa | ( | BOXA * | boxa, |
| l_int32 | spacing, | ||
| l_int32 | width, | ||
| l_int32 | orient, | ||
| l_int32 | outline | ||
| ) |
Input: boxa spacing (spacing between hash lines; must be > 1) width (hash line width) orient (orientation of lines: L_HORIZONTAL_LINE, ...) outline (0 to skip drawing box outline) Return: ptaa, or null on error
Notes: (1) The orientation takes on one of 4 orientations (horiz, vertical, slope +1, slope -1). (2) The full outline is also drawn if = 1. (3) Each of these pta can be rendered onto a pix with random colors, by using pixRenderRandomCmapPtaa() with closeflag = 1.
Definition at line 487 of file graphics.c.
References boxaGetBox(), boxaGetCount(), boxDestroy(), ERROR_PTR, generatePtaHashBox(), L_CLONE, L_HORIZONTAL_LINE, L_INSERT, L_NEG_SLOPE_LINE, L_POS_SLOPE_LINE, L_VERTICAL_LINE, NULL, PROCNAME, ptaaAddPta(), and ptaaCreate().
Input: pta (vertices of polyline) width closeflag (1 to close the contour; 0 otherwise) removedups (1 to remove, 0 to leave) Return: ptad, or null on error
Notes: (1) If the boxa has overlapping boxes, and if blending will be used to give a transparent effect, transparency artifacts at line intersections can be removed using removedups = 1.
Definition at line 537 of file graphics.c.
References ERROR_PTR, generatePtaWideLine(), NULL, PROCNAME, ptaClone(), ptaCreate(), ptaDestroy(), ptaGetCount(), ptaGetIPt(), ptaJoin(), ptaRemoveDuplicates(), x1, x2, y1, and y2.
Referenced by pixRenderPolyline(), pixRenderPolylineArb(), pixRenderPolylineBlend(), and pixRenderRandomCmapPtaa().
Input: radius Return: pta, or null on error
Notes: (1) The circle is has diameter = 2 * radius + 1. (2) It is located with the center of the circle at the point (radius, radius). (3) Consequently, it typically must be translated if it is to represent a set of pixels in an image.
Definition at line 596 of file graphics.c.
References ERROR_PTR, NULL, PROCNAME, ptaAddPt(), and ptaCreate().
Referenced by selDisplayInPix().
Input: x, y (point of origination) length (of line, including starting point) radang (angle in radians, CW from horizontal) Return: pta, or null on error
Notes: (1) The of the line is 1 greater than the distance used in locatePtRadially(). Example: a distance of 1 gives rise to a length of 2.
Definition at line 636 of file graphics.c.
References generatePtaLine(), x2, and y2.
Referenced by main(), selaAddCrossJunctions(), and selaAddTJunctions().
| l_int32 locatePtRadially | ( | l_int32 | xr, |
| l_int32 | yr, | ||
| l_float64 | dist, | ||
| l_float64 | radang, | ||
| l_float64 * | px, | ||
| l_float64 * | py | ||
| ) |
Input: xr, yr (reference point) radang (angle in radians, CW from horizontal) dist (distance of point from reference point along line given by the specified angle) &x, &y (<return> location of point) Return: 0 if OK, 1 on error
Definition at line 660 of file graphics.c.
Input: pix pta (arbitrary set of points) op (one of L_SET_PIXELS, L_CLEAR_PIXELS, L_FLIP_PIXELS) Return: 0 if OK, 1 on error
Notes: (1) L_SET_PIXELS puts all image bits in each pixel to 1 (black for 1 bpp; white for depth > 1) (2) L_CLEAR_PIXELS puts all image bits in each pixel to 0 (white for 1 bpp; black for depth > 1) (3) L_FLIP_PIXELS reverses all image bits in each pixel (4) This function clips the rendering to the pix. It performs clipping for functions such as pixRenderLine(), pixRenderBox() and pixRenderBoxa(), that call pixRenderPta().
Definition at line 700 of file graphics.c.
References ERROR_INT, L_CLEAR_PIXELS, L_FLIP_PIXELS, L_SET_PIXELS, pixClearPixel(), pixFlipPixel(), pixGetDimensions(), pixSetPixel(), PROCNAME, ptaGetCount(), and ptaGetIPt().
Referenced by main(), pixRenderBox(), pixRenderBoxa(), pixRenderHashBox(), pixRenderLine(), pixRenderPolyline(), pixRenderPtaArb(), selaAddCrossJunctions(), and selaAddTJunctions().
Input: pix pta (arbitrary set of points) rval, gval, bval Return: 0 if OK, 1 on error
Notes: (1) If pix is colormapped, render this color on each pixel. (2) If pix is not colormapped, do the best job you can using the input colors:
Definition at line 783 of file graphics.c.
References composeRGBPixel(), ERROR_INT, L_SET_PIXELS, pixcmapAddNewColor(), pixGetColormap(), pixGetDepth(), pixGetDimensions(), pixRenderPta(), pixSetPixel(), PROCNAME, ptaGetCount(), and ptaGetIPt().
Referenced by pixRenderBoxaArb(), pixRenderBoxArb(), pixRenderHashBoxArb(), pixRenderLineArb(), pixRenderPolylineArb(), and pixRenderRandomCmapPtaa().
| l_int32 pixRenderPtaBlend | ( | PIX * | pix, |
| PTA * | pta, | ||
| l_uint8 | rval, | ||
| l_uint8 | gval, | ||
| l_uint8 | bval, | ||
| l_float32 | fract | ||
| ) |
Input: pix (32 bpp rgb) pta (arbitrary set of points) rval, gval, bval Return: 0 if OK, 1 on error
Notes: (1) This function clips the rendering to the pix.
Definition at line 857 of file graphics.c.
References COLOR_BLUE, COLOR_GREEN, COLOR_RED, composeRGBPixel(), ERROR_INT, GET_DATA_BYTE, L_WARNING, NULL, pixGetDepth(), pixGetDimensions(), pixGetPixel(), pixSetPixel(), PROCNAME, ptaGetCount(), and ptaGetIPt().
Referenced by pixRenderBoxaBlend(), pixRenderBoxBlend(), pixRenderHashBoxBlend(), pixRenderLineBlend(), and pixRenderPolylineBlend().
| l_int32 pixRenderLine | ( | PIX * | pix, |
| l_int32 | x1, | ||
| l_int32 | y1, | ||
| l_int32 | x2, | ||
| l_int32 | y2, | ||
| l_int32 | width, | ||
| l_int32 | op | ||
| ) |
Input: pix x1, y1 x2, y2 width (thickness of line) op (one of L_SET_PIXELS, L_CLEAR_PIXELS, L_FLIP_PIXELS) Return: 0 if OK, 1 on error
Definition at line 922 of file graphics.c.
References ERROR_INT, generatePtaWideLine(), L_CLEAR_PIXELS, L_FLIP_PIXELS, L_SET_PIXELS, L_WARNING, NULL, pixRenderPta(), PROCNAME, and ptaDestroy().
Referenced by kernelDisplayInPix(), main(), pixaGenerateFont(), and selDisplayInPix().
| l_int32 pixRenderLineArb | ( | PIX * | pix, |
| l_int32 | x1, | ||
| l_int32 | y1, | ||
| l_int32 | x2, | ||
| l_int32 | y2, | ||
| l_int32 | width, | ||
| l_uint8 | rval, | ||
| l_uint8 | gval, | ||
| l_uint8 | bval | ||
| ) |
Input: pix x1, y1 x2, y2 width (thickness of line) rval, gval, bval Return: 0 if OK, 1 on error
Definition at line 962 of file graphics.c.
References ERROR_INT, generatePtaWideLine(), L_WARNING, NULL, pixRenderPtaArb(), PROCNAME, and ptaDestroy().
Referenced by main(), and pixFindBaselines().
| l_int32 pixRenderLineBlend | ( | PIX * | pix, |
| l_int32 | x1, | ||
| l_int32 | y1, | ||
| l_int32 | x2, | ||
| l_int32 | y2, | ||
| l_int32 | width, | ||
| l_uint8 | rval, | ||
| l_uint8 | gval, | ||
| l_uint8 | bval, | ||
| l_float32 | fract | ||
| ) |
Input: pix x1, y1 x2, y2 width (thickness of line) rval, gval, bval fract Return: 0 if OK, 1 on error
Definition at line 1003 of file graphics.c.
References ERROR_INT, generatePtaWideLine(), L_WARNING, NULL, pixRenderPtaBlend(), PROCNAME, and ptaDestroy().
Referenced by main().
Input: pix box width (thickness of box lines) op (one of L_SET_PIXELS, L_CLEAR_PIXELS, L_FLIP_PIXELS) Return: 0 if OK, 1 on error
Definition at line 1043 of file graphics.c.
References ERROR_INT, generatePtaBox(), L_CLEAR_PIXELS, L_FLIP_PIXELS, L_SET_PIXELS, NULL, pixRenderPta(), PROCNAME, and ptaDestroy().
Referenced by main().
| l_int32 pixRenderBoxArb | ( | PIX * | pix, |
| BOX * | box, | ||
| l_int32 | width, | ||
| l_uint8 | rval, | ||
| l_uint8 | gval, | ||
| l_uint8 | bval | ||
| ) |
Input: pix box width (thickness of box lines) rval, gval, bval Return: 0 if OK, 1 on error
Definition at line 1077 of file graphics.c.
References ERROR_INT, generatePtaBox(), NULL, pixRenderPtaArb(), PROCNAME, and ptaDestroy().
Referenced by boxaaDisplay(), jbDataRender(), main(), and pixDrawBoxaRandom().
| l_int32 pixRenderBoxBlend | ( | PIX * | pix, |
| BOX * | box, | ||
| l_int32 | width, | ||
| l_uint8 | rval, | ||
| l_uint8 | gval, | ||
| l_uint8 | bval, | ||
| l_float32 | fract | ||
| ) |
Input: pix box width (thickness of box lines) rval, gval, bval fract (in [0.0 - 1.0]; complete transparency (no effect) if 0.0; no transparency if 1.0) Return: 0 if OK, 1 on error
Definition at line 1113 of file graphics.c.
References ERROR_INT, generatePtaBox(), NULL, pixRenderPtaBlend(), PROCNAME, and ptaDestroy().
Referenced by main().
| l_int32 pixRenderHashBox | ( | PIX * | pix, |
| BOX * | box, | ||
| l_int32 | spacing, | ||
| l_int32 | width, | ||
| l_int32 | orient, | ||
| l_int32 | outline, | ||
| l_int32 | op | ||
| ) |
Input: pix box spacing (spacing between lines; must be > 1) width (thickness of box and hash lines) orient (orientation of lines: L_HORIZONTAL_LINE, ...) outline (0 to skip drawing box outline) op (one of L_SET_PIXELS, L_CLEAR_PIXELS, L_FLIP_PIXELS) Return: 0 if OK, 1 on error
Definition at line 1151 of file graphics.c.
References ERROR_INT, generatePtaHashBox(), L_CLEAR_PIXELS, L_FLIP_PIXELS, L_HORIZONTAL_LINE, L_NEG_SLOPE_LINE, L_POS_SLOPE_LINE, L_SET_PIXELS, L_VERTICAL_LINE, pixRenderPta(), PROCNAME, and ptaDestroy().
Referenced by main().
| l_int32 pixRenderHashBoxArb | ( | PIX * | pix, |
| BOX * | box, | ||
| l_int32 | spacing, | ||
| l_int32 | width, | ||
| l_int32 | orient, | ||
| l_int32 | outline, | ||
| l_int32 | rval, | ||
| l_int32 | gval, | ||
| l_int32 | bval | ||
| ) |
Input: pix box spacing (spacing between lines; must be > 1) width (thickness of box and hash lines) orient (orientation of lines: L_HORIZONTAL_LINE, ...) outline (0 to skip drawing box outline) rval, gval, bval Return: 0 if OK, 1 on error
Definition at line 1197 of file graphics.c.
References ERROR_INT, generatePtaHashBox(), L_HORIZONTAL_LINE, L_NEG_SLOPE_LINE, L_POS_SLOPE_LINE, L_VERTICAL_LINE, pixRenderPtaArb(), PROCNAME, and ptaDestroy().
Referenced by main(), pixFindHistoPeaksHSV(), pixFindLargestRectangle(), RenderHashedBoxa(), and RenderTransformedBoxa().
| l_int32 pixRenderHashBoxBlend | ( | PIX * | pix, |
| BOX * | box, | ||
| l_int32 | spacing, | ||
| l_int32 | width, | ||
| l_int32 | orient, | ||
| l_int32 | outline, | ||
| l_int32 | rval, | ||
| l_int32 | gval, | ||
| l_int32 | bval, | ||
| l_float32 | fract | ||
| ) |
Input: pix box spacing (spacing between lines; must be > 1) width (thickness of box and hash lines) orient (orientation of lines: L_HORIZONTAL_LINE, ...) outline (0 to skip drawing box outline) rval, gval, bval fract (in [0.0 - 1.0]; complete transparency (no effect) if 0.0; no transparency if 1.0) Return: 0 if OK, 1 on error
Definition at line 1245 of file graphics.c.
References ERROR_INT, generatePtaHashBox(), L_HORIZONTAL_LINE, L_NEG_SLOPE_LINE, L_POS_SLOPE_LINE, L_VERTICAL_LINE, pixRenderPtaBlend(), PROCNAME, and ptaDestroy().
Referenced by main().
Input: pix boxa width (thickness of line) op (one of L_SET_PIXELS, L_CLEAR_PIXELS, L_FLIP_PIXELS) Return: 0 if OK, 1 on error
Definition at line 1289 of file graphics.c.
References ERROR_INT, generatePtaBoxa(), L_CLEAR_PIXELS, L_FLIP_PIXELS, L_SET_PIXELS, NULL, pixRenderPta(), PROCNAME, and ptaDestroy().
Referenced by main().
| l_int32 pixRenderBoxaArb | ( | PIX * | pix, |
| BOXA * | boxa, | ||
| l_int32 | width, | ||
| l_uint8 | rval, | ||
| l_uint8 | gval, | ||
| l_uint8 | bval | ||
| ) |
Input: pix boxa width (thickness of line) rval, gval, bval Return: 0 if OK, 1 on error
Definition at line 1323 of file graphics.c.
References ERROR_INT, generatePtaBoxa(), NULL, pixRenderPtaArb(), PROCNAME, and ptaDestroy().
Referenced by main(), pixDrawBoxa(), and pixItalicWords().
| l_int32 pixRenderBoxaBlend | ( | PIX * | pix, |
| BOXA * | boxa, | ||
| l_int32 | width, | ||
| l_uint8 | rval, | ||
| l_uint8 | gval, | ||
| l_uint8 | bval, | ||
| l_float32 | fract, | ||
| l_int32 | removedups | ||
| ) |
Input: pix boxa width (thickness of line) rval, gval, bval fract (in [0.0 - 1.0]; complete transparency (no effect) if 0.0; no transparency if 1.0) removedups (1 to remove; 0 otherwise) Return: 0 if OK, 1 on error
Definition at line 1360 of file graphics.c.
References ERROR_INT, generatePtaBoxa(), NULL, pixRenderPtaBlend(), PROCNAME, and ptaDestroy().
Referenced by main().
Input: pix ptas width (thickness of line) op (one of L_SET_PIXELS, L_CLEAR_PIXELS, L_FLIP_PIXELS) closeflag (1 to close the contour; 0 otherwise) Return: 0 if OK, 1 on error
Note: this renders a closed contour.
Definition at line 1399 of file graphics.c.
References ERROR_INT, generatePtaPolyline(), L_CLEAR_PIXELS, L_FLIP_PIXELS, L_SET_PIXELS, NULL, pixRenderPta(), PROCNAME, and ptaDestroy().
| l_int32 pixRenderPolylineArb | ( | PIX * | pix, |
| PTA * | ptas, | ||
| l_int32 | width, | ||
| l_uint8 | rval, | ||
| l_uint8 | gval, | ||
| l_uint8 | bval, | ||
| l_int32 | closeflag | ||
| ) |
Input: pix ptas width (thickness of line) rval, gval, bval closeflag (1 to close the contour; 0 otherwise) Return: 0 if OK, 1 on error
Note: this renders a closed contour.
Definition at line 1437 of file graphics.c.
References ERROR_INT, generatePtaPolyline(), NULL, pixRenderPtaArb(), PROCNAME, and ptaDestroy().
| l_int32 pixRenderPolylineBlend | ( | PIX * | pix, |
| PTA * | ptas, | ||
| l_int32 | width, | ||
| l_uint8 | rval, | ||
| l_uint8 | gval, | ||
| l_uint8 | bval, | ||
| l_float32 | fract, | ||
| l_int32 | closeflag, | ||
| l_int32 | removedups | ||
| ) |
Input: pix ptas width (thickness of line) rval, gval, bval fract (in [0.0 - 1.0]; complete transparency (no effect) if 0.0; no transparency if 1.0) closeflag (1 to close the contour; 0 otherwise) removedups (1 to remove; 0 otherwise) Return: 0 if OK, 1 on error
Definition at line 1476 of file graphics.c.
References ERROR_INT, generatePtaPolyline(), NULL, pixRenderPtaBlend(), PROCNAME, and ptaDestroy().
Referenced by main().
| PIX* pixRenderRandomCmapPtaa | ( | PIX * | pix, |
| PTAA * | ptaa, | ||
| l_int32 | polyflag, | ||
| l_int32 | width, | ||
| l_int32 | closeflag | ||
| ) |
Input: pix (1, 2, 4, 8, 16, 32 bpp) ptaa polyflag (1 to interpret each Pta as a polyline; 0 to simply render the Pta as a set of pixels) width (thickness of line; use only for polyline) closeflag (1 to close the contour; 0 otherwise; use only for polyline mode) Return: pixd (cmapped, 8 bpp) or null on error
Notes: (1) This is a debugging routine, that displays a set of pixels, selected by the set of Ptas in a Ptaa, in a random color in a pix. (2) If == 1, each Pta is considered to be a polyline, and is rendered using and . Each polyline is rendered in a random color. (3) If == 0, all points in each Pta are rendered in a random color. The and parameters are ignored. (4) The output pix is 8 bpp and colormapped. Up to 254 different, randomly selected colors, can be used. (5) The rendered pixels replace the input pixels. They will be clipped silently to the input pix.
Definition at line 1530 of file graphics.c.
References ERROR_PTR, FALSE, generatePtaPolyline(), L_CLONE, NULL, pixcmapCreateRandom(), pixcmapGetColor(), pixConvertTo8(), pixRenderPtaArb(), pixSetColormap(), PROCNAME, ptaaGetCount(), ptaaGetPta(), ptaClone(), and ptaDestroy().
Referenced by DoPageSegmentation(), main(), pixDrawBoxaRandom(), and pixGetRegionsBinary().
Input: pixs (8 or 16 bpp; no colormap) startval (value of lowest contour; must be in [0 ... maxval]) incr (increment to next contour; must be > 0) outdepth (either 1 or depth of pixs) Return: pixd, or null on error
Notes: (1) The output can be either 1 bpp, showing just the contour lines, or a copy of the input pixs with the contour lines superposed.
Definition at line 1590 of file graphics.c.
References ERROR_PTR, GET_DATA_BYTE, GET_DATA_TWO_BYTES, L_WARNING, NULL, pixCopy(), pixCopyResolution(), pixCreate(), pixGetColormap(), pixGetData(), pixGetDimensions(), pixGetWpl(), PROCNAME, SET_DATA_BIT, SET_DATA_BYTE, and SET_DATA_TWO_BYTES.
Referenced by TestDistance().
Input: fpixs startval (value of lowest contour incr (increment to next contour; must be > 0.0) proxim (required proximity to target value; typ. 0.1 * incr) Return: pixd (1 bpp), or null on error
Definition at line 1712 of file graphics.c.
References ERROR_PTR, fpixGetData(), fpixGetDimensions(), fpixGetWpl(), L_ABS, NULL, pixCreate(), pixGetData(), pixGetWpl(), PROCNAME, and SET_DATA_BIT.
Referenced by dewarpBuildModel(), and main().
1.7.3 
