ham_convert 1.3.1

New in this version: higher quality HAM6 conversion due to improved triple mode and LAB mode combination. Experimental HAM5 conversion.

ham_convert 1.3.1

ham_convert 1.3.1

Download:
Main mirror (all stable and testing versions)
External mirror


Changelog:

  • HAM6: new higher quality “aggressive” LAB mode based on CIE 76 that distributes error more evenly across 3 consecutive pixels. Produces less artefacts than the previous version and better preserves vertical lines. Requires enabling dual mode or triple mode, but triple mode is recommended. Enabled by default.
    Update: another variant based on CIE 94 was added in the 1.3.2 beta.
  • HAM6: added new palette modes: blank+fixed HAM pattern (RGRG, RGBG on even lines+BGRG on odd lines, fakemode). These are special modes that can be useful when fixed HAM pattern is required or when combined with the unofficial “7-planes” ocs mode.
  • Experimental preview of the HAM5 conversion – 1 control bit (and 1 hardwired to zero)+4 bits of data, 12-bit color space (Amiga OCS/ECS). Differences from ham6: red and modify green operations are unavailable resulting in worse quality. Only dual mode works now, triple mode runs as a single mode, iff may not work due to lack of software support, confirmed to work on Paint.net.
  • Experimental preview of the HAM7 conversion – specs need futher research.
  • HAM6: added normal checks dithering (checks lines variants often produce better results).
  • Faster LAB HAM6 conversion.
  • Extra ham6 palette optimization speed tweaks.
  • DynamicHires: fixes a small palette editor bug appearing after the first conversion.
  • Fixed sliced mode crash bug.

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