Generic Image Decoder / News: Recent posts

• Quality of progressive JPEG and overall performance of JPEG decoding have been improved.
• There are also two new tools shipped with GID (and of course using it):
  • comp_img: an image comparison tool (result is from 0: identical, to 1: black/white)
  • benchmark: a performance test between GID and ImageMagick, an open-source library. Test images are incorporated in the repository and the .zip release files. Some results: GID is significantly faster than ImageMagick for the GIF and PNG formats! More details here.

Added support for progressive JPEG images.

Added support for animated PNGs.

• Added a decoder for the QOI (Quite OK Image) format
• Added an all RGB demo

A code review and cleanup of the Recurve automatic digitization tool provided with GID has lead to a significant improvement on the quality of detected curves.
Before...

After...
... read more

Source code gardening: removal of needless "use" clauses (GNAT Community 2018 detects them)

Improvements in JPEG and GIF decoding.

Minor issues were fixed:

• TGA: transparency hint correctly detected
• GIF: workaround for an encoding bug in some animated GIF's

In the "tools" area, we've added two image processing examples:

• Recurve, a tool for retrieving sets of (x,y) points from several curves plotted on a chart
• Is_opaque, a tool for determining whether an image is fully opaque (not a single pixel with transparency), or not

• Source code gardening. The decoder builds successfully with ObjectAda 7.2.2 SE - and GNAT as before.
• Tools: steg (steganography tool) improved about minimal image size.

• Added PNM (PBM, PGM, PPM) formats
• Added steganography demo
• Image descriptors can be reused