Description:

Leptonica is a pedagogically-oriented open source software library that is
broadly useful for image processing and image analysis applications.

Featured operations are
* Rasterop (a.k.a. bitblt)
* Affine transformations (scaling, translation, rotation, shear) on images of
arbitrary pixel depth
* Binary and grayscale morphology, rank order, and convolution
* Seedfill and connected components
* Image transformations combining changes in scale and pixel depth
* Pixelwise masking, blending, enhancement, arithmetic ops, etc.
* Ancillary operations include
* I/O for standard image formats
* Utilities to handle arrays of image-related data types
* Utilities for generic stacks, queues, heaps and lists; and for byte queues
and arrays of numbers and strings

Example applications include
* Octcube-based color quantization, with and without dithering
* Skew determination of text images
* Segmentation of page images with mixed text and images
* jbig2 unsupervised classifier
* Border representations of 1 bit/pixel images and raster conversion for SVG
* PostScript wrapping (levels 1, 2) of images for device-independent output
* Rendering text on an image
* Connectivity-preserving thinning and thickening of 1 bit/pixel images
* Line removal from a grayscale sketch
* Search for least-cost paths on binary and grayscale images