| dwacomb.2.c |
Auto-gen'd Destination Word Accumulation (DWA) Morphology Code |
DWA morphology with auto-generated comb Sels for composite operations on brick Sels |
| dwacomblow.2.c |
Auto-gen'd Destination Word Accumulation (DWA) Morphology Code |
Low-level Sel implementation for dwacomb.2.c |
| fhmtgen.1.c |
Auto-gen'd Destination Word Accumulation (DWA) Morphology Code |
DWA morphology with auto-generated hit-miss sels (high-level) |
| fhmtgenlow.1.c |
Auto-gen'd Destination Word Accumulation (DWA) Morphology Code |
Low-level Sel implementation for fhmtgen.1.c |
| fmorphgen.1.c |
Auto-gen'd Destination Word Accumulation (DWA) Morphology Code |
DWA morphology with auto-generated brick sels (high-level) |
| fmorphgenlow.1.c |
Auto-gen'd Destination Word Accumulation (DWA) Morphology Code |
Low-level Sel implementation for fmorphgen.1.c |
| boxbasic.c |
Basic Box, Boxa and Boxaa Functions |
Implementation of Box, Boxa (Box array), and Boxaa classes |
| boxfunc1.c |
Basic Box, Boxa and Boxaa Functions |
Box intersection, union, containment; Boxa union, extent, permutation |
| boxfunc2.c |
Basic Box, Boxa and Boxaa Functions |
Boxa/Box transforms; Boxa/Boxaa sorting; Boxaa utilities |
| boxfunc3.c |
Basic Box, Boxa and Boxaa Functions |
Mask <-> Boxa; painting into and drawing Boxa |
| arithlow.c |
Basic image operations |
Low-level implementation of grayscale image arithmetic |
| convolve.c |
Basic image operations |
Grayscale, color, float, double convolution; windowed mean, block sum and rank filters; census transform |
| convolvelow.c |
Basic image operations |
Optimized low-level implementation of grayscale convolution and binary rank filter |
| correlscore.c |
Basic image operations |
Correlation between pairs of binary images |
| kernel.c |
Basic image operations |
Basic operations on image kernels for convolution; special kernels |
| pixacc.c |
Basic image operations |
Simple interface for grayscale image arithmetic |
| pixarith.c |
Basic image operations |
Grayscale image arithmetic |
| rank.c |
Basic image operations |
Rank order filters (generalization of min/median/max filters) |
| rop.c |
Basic image operations |
General rasterops. "pixRasterop() is your friend; it is worth memorizing!" |
| ropiplow.c |
Basic image operations |
Low-level implementation of in-place rasterops |
| roplow.c |
Basic image operations |
Low-level general rasterop implementation |
| pixabasic.c |
Basic Pix Array Functions |
Implements Pixa (array of Pix) and Pixaa (2d array of Pix) class |
| pixafunc1.c |
Basic Pix Array Functions |
Binary Pixa (array of Pix) filtering, sorting, clipping. See conncomp.c |
| pixafunc2.c |
Basic Pix Array Functions |
Render a Pixa or Pixaa in a Pix |
| pixalloc.c |
Basic Pix Array Functions |
Custom memory allocation for Pix memory |
| pixtiling.c |
Basic Pix Array Functions |
Split an image into tiles and perform operations independently on each tile |
| compare.c |
Basic Pix Functions |
Pix equality, binary Pix correlation, image differences |
| pix1.c |
Basic Pix Functions |
Implements Pix (image) class - the fundamental one for this library |
| pix2.c |
Basic Pix Functions |
Pixel poking of image, pad and border pixels |
| pix3.c |
Basic Pix Functions |
Masking and logical ops, counting, mirrored tiling |
| pix4.c |
Basic Pix Functions |
Histograms, fg/bg estimation, rectangle extraction |
| pix5.c |
Basic Pix Functions |
Property measurement of 1bbp images, rectangular region extraction, property measurement along lines, cropping to foreground |
| blend.c |
Colormap Utilities and Related Operations |
Blend (optionally with a mask) and re-coloring images |
| colormap.c |
Colormap Utilities and Related Operations |
Implements PixColormap; colormap conversions, serialization, transforms |
| colorspace.c |
Colormap Utilities and Related Operations |
Colorspace conversions between RGB, HSV, and YUV |
| paintcmap.c |
Colormap Utilities and Related Operations |
Paint onto colormap images - regions, masks |
| ccbord.c |
Connected Components in Binary Images |
Border representation of connected components: display and svg serialization |
| ccthin.c |
Connected Components in Binary Images |
Connected-component-preserving thinning |
| conncomp.c |
Connected Components in Binary Images |
Connected component counting and extraction (Heckbert's seedfill algorithm) |
| fpix1.c |
Float-Valued Images |
Implements FPix and DPix classes (float and double images) |
| fpix2.c |
Float-Valued Images |
FPix operations: interconversion FPix <-> Pix; borders; rasterop; arithmetic |
| bmpio.c |
Formatted I/O |
Read/write bmp format, from/to file and memory |
| gifio.c |
Formatted I/O |
Read/write gif format from/to file and memory |
| jpegio.c |
Formatted I/O |
Read/write jpeg format from/to file and memory |
| leptwin.c |
Formatted I/O |
Leptonica routines needed only on Microsoft Windows |
| pdfio.c |
Formatted I/O |
Read/write pdf format from/to file and memory |
| pngio.c |
Formatted I/O |
Read/write png format from/to file and memory |
| pnmio.c |
Formatted I/O |
Read/write pnm format from/to file and memory |
| psio1.c |
Formatted I/O |
High level PostScript device driver for wrapping sets of images in PostScript |
| psio2.c |
Formatted I/O |
Lower-level PostScript device driver for wrapping images |
| readfile.c |
Formatted I/O |
Pix from memory and disk; detecting format |
| spixio.c |
Formatted I/O |
Fast pix serialization to/from file |
| tiffio.c |
Formatted I/O |
Read/write tiff format from/to file and memory |
| webpio.c |
Formatted I/O |
Read/write webp format from/to file |
| writefile.c |
Formatted I/O |
Pix to memory and disk; selecting format |
| bmpiostub.c |
Formatted I/O Stub Functions |
Read/write bmp format, from/to file and memory |
| gifiostub.c |
Formatted I/O Stub Functions |
Read/write gif format from/to file and memory |
| jpegiostub.c |
Formatted I/O Stub Functions |
Read/write jpeg format from/to file and memory |
| pdfiostub.c |
Formatted I/O Stub Functions |
Read/write pdf format from/to file and memory |
| pngiostub.c |
Formatted I/O Stub Functions |
Read/write png format from/to file and memory |
| pnmiostub.c |
Formatted I/O Stub Functions |
Read/write pnm format from/to file and memory |
| psio1stub.c |
Formatted I/O Stub Functions |
High level PostScript device driver for wrapping sets of images in PostScript |
| psio2stub.c |
Formatted I/O Stub Functions |
Lower-level PostScript device driver for wrapping images |
| tiffiostub.c |
Formatted I/O Stub Functions |
Read/write tiff format from/to file and memory |
| webpiostub.c |
Formatted I/O Stub Functions |
Read/write webp format from/to file |
| bytearray.c |
Fundamental Data Structures for Computation |
Functions for handling byte arrays, in analogy with C++ 'strings' |
| heap.c |
Fundamental Data Structures for Computation |
Implements heap of generic pointers to structs that are keyed by a float, used for priority queue |
| list.c |
Fundamental Data Structures for Computation |
Implements doubly-linked list of generic pointers |
| numabasic.c |
Fundamental Data Structures for Computation |
Basic operations for float/int arrays (Numa, Numaa, Numa2d, NumaHash) |
| numafunc1.c |
Fundamental Data Structures for Computation |
Arithmetic, data extraction, interpolation, sorting on numas |
| numafunc2.c |
Fundamental Data Structures for Computation |
Shift, scale, convolve, histograms, rank statistics, splitting distributions, extrema finding, threshold crossing, frequency analysis |
| pixcomp.c |
Fundamental Data Structures for Computation |
Handles compressed pix arrays in memory. |
| ptabasic.c |
Fundamental Data Structures for Computation |
Implements 1d and 2d arrays of points (Pta, Ptaa) |
| ptafunc1.c |
Fundamental Data Structures for Computation |
Manipulation/calculations using arrays of points |
| ptra.c |
Fundamental Data Structures for Computation |
Implements 1d and 2d arrays of generic pointers (Ptra, Ptraa) |
| quadtree.c |
Fundamental Data Structures for Computation |
Quadtree creation and statistics. |
| queue.c |
Fundamental Data Structures for Computation |
Implements queue of generic pointers |
| sarray.c |
Fundamental Data Structures for Computation |
Impements an array of C strings, and useful utilities based on it |
| stack.c |
Fundamental Data Structures for Computation |
Implements a stack of generic pointers |
| allheaders.h |
Header Files |
Includes all required Leptonica header files |
| alltypes.h |
Header Files |
Includes all required Leptonica type related header files |
| array.h |
Header Files |
Structs for basic number and string arrays (Numa, Numaa, Numa2d, NumaHash and Sarray) |
| bbuffer.h |
Header Files |
Struct for expandable byte buffer (see bbuffer.c) |
| bmf.h |
Header Files |
Structs for bitmap fonts |
| bmp.h |
Header Files |
Structs for bmp file format (uncompressed) |
| ccbord.h |
Header Files |
Structs for representation of 1 bpp component outlines |
| dewarp.h |
Header Files |
Data structure to hold arrays and results for generating a vertical disparity array based on textlines |
| endianness.h |
Header Files |
Machine endian test helper |
| environ.h |
Header Files |
Specifies external libraries to be used, and whether the runtime supports output redirection from files to memory |
| freetype.h |
Header Files |
Display freetype fonts in a pix. |
| gplot.h |
Header Files |
Struct and parameters for generating gnuplot files |
| heap.h |
Header Files |
Struct for representing generic expandable priority queue (L_Heap) |
| imageio.h |
Header Files |
Enums for supported image file formats |
| jbclass.h |
Header Files |
Structs for unsupervised classification of 1 bpp components from a set of pages; used for jbig2 compression |
| leptprotos.h |
Header Files |
ANSII C headers for all functions in the library, automatically generated by xtractprotos |
| leptwin.h |
Header Files |
ANSII C headers for Leptonica routines needed only on Microsoft Windows |
| list.h |
Header Files |
Struct for generic double-linked list; macros for list traversal |
| morph.h |
Header Files |
Structs for image morphology (Sel, Sela) and convolution (Kernel), with enum flags |
| pix.h |
Header Files |
Basic file defining image and image-related structs (Pix, PixColormap, Pixa, Pixaa, Box, Boxa, Boxaa, Pta, Ptaa, Pixacc, PixTiling, FPix, DPix, PixComp, PixaComp), along with enums for many operations |
| ptra.h |
Header Files |
Structs for generic expandable arrays (L_Ptra, L_Ptraa) |
| queue.h |
Header Files |
Struct for generic expandable queue (L_Queue) |
| readbarcode.h |
Header Files |
Enums and consts for reading 1d barcodes |
| stack.h |
Header Files |
Struct for generic expandable stack (L_Stack) |
| sudoku.h |
Header Files |
Sudoku related structures |
| watershed.h |
Header Files |
Struct for generating watershed information from a grayscale image |
| colormorph.c |
Image Morphology |
Color morphological operations (apply grayscale separately to each component) |
| fhmtauto.c |
Image Morphology |
Code generator, writes dwa code for user-supplied hit-miss transform Sels |
| fmorphauto.c |
Image Morphology |
Code generator, writes dwa code for erosion, dilation, opening and closing, for user-supplied Sels |
| graymorph.c |
Image Morphology |
Top-level grayscale morphological operations |
| graymorphlow.c |
Image Morphology |
Low-level implementation of grayscale morphology |
| morph.c |
Image Morphology |
Binary morphological operations (dilate, erode, hit-miss, open, close) |
| morphapp.c |
Image Morphology |
Composite morph ops: component-wise, union/isect, tophat, gradient, granulometry |
| morphdwa.c |
Image Morphology |
Binary morphological (dwa) operations |
| morphseq.c |
Image Morphology |
Interpreter for morphological operations, including binary expansion and reduction |
| sel1.c |
Image Morphology |
Implements Sel (morph structuring element) and Sela (array of sel) |
| sel2.c |
Image Morphology |
Contains definitions of simple structuring elements |
| selgen.c |
Image Morphology |
Generate hit-miss Sels for doing a loose match to a small bitmap |
| seedfill.c |
Image Operations with Filling |
Binary and gray seedfill; distance functions; voronoi-like seed spreading; local extrema |
| seedfilllow.c |
Image Operations with Filling |
Low-level implementation of binary and gray seedfill |
| watershed.c |
Image Operations with Filling |
Find watershed basins from specified seeds in grayscale image |
| adaptmap.c |
Image Quantization/Depth Conversion |
local adaptive grayscale quantization; mostly gray-to-gray in preparation |
| binarize.c |
Image Quantization/Depth Conversion |
Special binarization methods, locally adaptive: Otsu and Sauvola |
| colorcontent.c |
Image Quantization/Depth Conversion |
Measure and map the color content (divergence from gray) of an image |
| colorquant1.c |
Image Quantization/Depth Conversion |
Octcube color quantization |
| colorquant2.c |
Image Quantization/Depth Conversion |
Modified median cut color quantization (Heckbert) |
| colorseg.c |
Image Quantization/Depth Conversion |
Unsupervised color segmentation; selection and display of color content in HSV |
| convertfiles.c |
Image Quantization/Depth Conversion |
Perform depth conversion on selected files |
| grayquant.c |
Image Quantization/Depth Conversion |
Standard, simple, general grayscale quantization |
| grayquantlow.c |
Image Quantization/Depth Conversion |
Low-level implementation for some grayscale quantiziation functions |
| pixconv.c |
Image Quantization/Depth Conversion |
Convert between images of different types without scaling |
| binexpand.c |
Image Scaling |
Integer upscaling of 1 bpp images by replicated expansion |
| binexpandlow.c |
Image Scaling |
Low-level implementation of integer upscaling |
| binreduce.c |
Image Scaling |
Power of 2 integer reduction of 1 bpp images by sampling and rank value |
| binreducelow.c |
Image Scaling |
Low-level implementation of power of 2 reduction |
| scale.c |
Image Scaling |
Image up- and down-scaling, by linear interpolation, area mapping, and sampling; scaling from binary to gray; mipmap scaling; upscaling with thresholding; downscaling with min, max and rank value |
| scalelow.c |
Image Scaling |
Low-level implementation of scaling functions |
| gplot.c |
Line Graphics and Special Output |
Basic gnuplot-based plotting; serialization of plots |
| graphics.c |
Line Graphics and Special Output |
Rendering shapes from lines (using Pta representation) |
| viewfiles.c |
Line Graphics and Special Output |
Generates html for viewing a directory of images |
| arrayaccess.c |
Low-Level Pixel Access |
Function access to pixels in 32-bit arrays |
| arrayaccess.h |
Low-Level Pixel Access |
Macro access to pixels in 32-bit arrays |
| runlength.c |
Low-Level Pixel Access |
Run-length-encoding, horizontal and vertical run membership |
| maze.c |
Maze |
A game with a pedagogical slant: generate and search binary and grayscale mazes |
| bbuffer.c |
Miscellaneous Utilities |
Implements ByteBuffer, a byte queue; used for zlib comp/decomp in memory |
| endiantest.c |
Miscellaneous Utilities |
When used with the gnu compiler, it allows efficient computation of the endian flag as part of the normal compilation process. |
| libversions.c |
Miscellaneous Utilities |
Returns string with image library versions. |
| parseprotos.c |
Miscellaneous Utilities |
Parse output of cpp to generate ANSII C function prototypes from a file of C functions |
| regutils.c |
Miscellaneous Utilities |
Regression test utilities |
| regutils.h |
Miscellaneous Utilities |
Regression test parameter packer |
| sudoku.c |
Miscellaneous Utilities |
Solve a sudoku by brute force search |
| utils.c |
Miscellaneous Utilities |
Error, warning and info macros; safe string ops; file <-> memory ops; byte-swapping, file naming and timing ops |
| xtractprotos.c |
Miscellaneous Utilities |
Accepts a list of C files on the command line and outputs the C prototypes to stdout. |
| zlibmem.c |
Miscellaneous Utilities |
Compresses and decompresses a byte array from one memory buffer to another |
| zlibmemstub.c |
Miscellaneous Utilities Stub Functions |
zlib operations in memory, using bbuffer |
| affine.c |
Other Geometric Image Transforms |
3-pt affine transforms on images and coordinates, with sampling and interpolation; gauss-jordan solver |
| affinecompose.c |
Other Geometric Image Transforms |
Composable affine coordinate transforms |
| bilinear.c |
Other Geometric Image Transforms |
4-pt bilinear transforms on images and coordinates, with sampling and interpolation |
| projective.c |
Other Geometric Image Transforms |
4-pt projective transforms on images and coordinates, with sampling and interpolation |
| rotate.c |
Other Geometric Image Transforms |
Top-level image rotation by interpolation and sampling |
| rotateam.c |
Other Geometric Image Transforms |
Interpolated image rotation |
| rotateamlow.c |
Other Geometric Image Transforms |
Low-level helpers for interpolated rotation |
| rotateorth.c |
Other Geometric Image Transforms |
Orthogonal image rotation and flips |
| rotateorthlow.c |
Other Geometric Image Transforms |
Low-level helpers for orthogonal rotation |
| rotateshear.c |
Other Geometric Image Transforms |
Image rotation by shear |
| shear.c |
Other Geometric Image Transforms |
Image shear about arbitrary lines and special points |
| bardecode.c |
Specialized Document Image Processing |
Decode barcodes after sequence of widths is found |
| baseline.c |
Specialized Document Image Processing |
Find text baselines; determine and remove local skew |
| bmf.c |
Specialized Document Image Processing |
Generation of bitmap fonts |
| classapp.c |
Specialized Document Image Processing |
Unsupervised classification of connected components and words; image comparison using word bounding boxes |
| dewarp.c |
Specialized Document Image Processing |
Dewarp scanned book pages by generating a vertical disparity array based on textlines |
| finditalic.c |
Specialized Document Image Processing |
Identifies italic words |
| flipdetect.c |
Specialized Document Image Processing |
Page orientation detection (on roman text) |
| fliphmtgen.c |
Specialized Document Image Processing |
Hit-miss transforms for flipdetect.c |
| freetype.c |
Specialized Document Image Processing |
Display freetype fonts in a pix. |
| jbclass.c |
Specialized Document Image Processing |
data extraction from a set of pages for jbig2 compression |
| pageseg.c |
Specialized Document Image Processing |
Top-level page segmentation, halftone region extraction, textline extraction |
| partition.c |
Specialized Document Image Processing |
Bruel algorithm for extracting large whitespace boxes from a binary image: classification and location of connected components (characters or words) |
| readbarcode.c |
Specialized Document Image Processing |
Early beta code for locating and identifying line widths in 1d barcodes |
| skew.c |
Specialized Document Image Processing |
Find and remove text page skew |
| textops.c |
Specialized Document Image Processing |
Simple utility to put text on images |
| warper.c |
Specialized Document Image Processing |
Simple captcha generator based on random warping |
| edge.c |
Specialized Image Filters |
Sobel and related edge filters |
| enhance.c |
Specialized Image Filters |
Image enhancements: gamma TRC mapping; contrast enhancement, histogram eq; unsharp-masking; hue and saturation |
