PhotoTechEDU Day 11: Document Image Analysis with Leptonica

Google Tech Talks April 4, 2007 ABSTRACT Graphics typically takes a representation of an image or scene and renders it in raster form. This normally occurs through a well-specified process. What happens when you try to go the other way, from a raster image to a description of its contents? The process, so easy for humans, is not easy for machines, because the input raster data can be highly variable and the interpretation of the contents somewhat arbitrary. We'll talk about how this 'inverse graphics' process can be accomplished quickly and usually with sufficient accuracy for most applications, using rasters of document images as input. The 'trick' is to use the image as the primary...