It converts scanned images of text back to text files.
GOCR claims it can handle single-column sans-serif fonts of 20–60 pixels in height. It reports trouble with serif fonts, overlapping characters, handwritten text, heterogeneous fonts, noisy images, large angles of skew, and text in anything other than a Latin alphabet.
GOCR can also translate barcodes.
Acceptable image formats are:
Other formats are automatically converted using netpbm-progs, gzip and bzip2 via the use of a unix pipe. These images types include: