Software for image processing and image analysis applications

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An open source C library for efficient image processing and image analysis operations.

Leptonica Web Site


Editors, Graphics


BSD License


  • 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.
  • 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

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