25.02.09.18 - Memory usage reduced

Relinking with newest image i/o modules, significantly reducing memory usage when writing files, and allowing stable work with large images.

25.02.01 - FIR optimization

FIR optimization for all method.

Method	Speed gain, % of original (median for 7 runs each, rounded to smaller ±5%)
Scale2x	15%
Scale3x	50%
Scale2xSFX	50%
Scale3xSFX	40%

Note

Figures above are related only to rescaling routine itself; reading and saving files takes additional time not depending on scaling optimization.

25.01.19 - New methods added

Scale2xSFX and Scale3xSFX methods added, providing better diagonals rendering and less artifacts. Initial Scale2x and Scale3x got some 10-15% speed-up. Multiple single-task programs replaced with single common GUI shell, reducing file mess.

Image formats support improved

10 Dec 2025: PyPNM updated, providing better compatibility; minor troubles with paletted PNGs fixed.

25.01.07 General update

General restructure, misc. improvements in dirrerent file subformats support.

25.01.01 PPM, PGM, PBM support

PBM read support added, PPM and PGM support optimized.

PPM and PGM support

PPM and PGM support added to single file rescalers beside PNG support. Batch rescalers still limited to PNG.

Maintenance update

Maintenance update following internal changes (sources more PEP-compliant etc.)

Major update

Substantial I/O change, performance improvement.

Major changes

Main programs changed, GUI and command line versions merged in one file per each method (see readme for more information); includes rewritten to improve speed.