Changelog

Imago OCR 2.0

22 February 2013

• Recognition quality:

  • Added adaptive preliminary filters designed for recognition of low-quality scans or even photos;

  • Recognition rate is significantly improved due to usage of highly-adaptive methods instead of strict criterias;

  • Restriction constants and recognition parameters are moved into configurable clusters, so the better recognition rate can be achieved on various non-typical image sets using machine learning approach;

  • Machine learning tool is embedded in console application, added ability to quickly check recognition rate on specified collection;

• Chemical features:

  • Chemical feature set is extended: bridged bonds, query features, R-groups are handled properly;

  • Superatom labels validation logic introduced which greatly increases recognition probability of complex superatom labels;

  • Abbreviation expansion support added;

• Improved interoperability:

  • Added support of various popular image formats: JPG, BMP, DIB, TIFF, PBM, RAS and others;

  • Implemented the new logging system which produces nice human-readable reports;

  • Replaced characters recognition system, the new one supports user-defined fonts;

  • Updated API and Java / C wrappers;

  • Updated build system, reduced dependencies list;

  • Fixed a lot of bugs, overall stability is significantly improved, decreased memory consumption.

Imago OCR 1.0

28 March 2011

• Recognizable Molecule Features

  • Single, double, triple bonds;

  • Atom labels, subscripts, isotopes, charges;

  • Superatoms;

  • Rings;

  • Stereochemistry (up- and down-bonds);

• Supported PNG image format;

• Implemented characters recognition system based on Fourier Descriptors;

• Java and C wrappers introduced;

• Ego, a Java GUI application introduced

• Improved techniques are used for molecular graph extraction.