SOMMARHACK 2020
JULY 4


  Convert photo to STMED
There has, understandably, come up some questions how the heck to convert a photo to Atari ST medium resolution and the Degas Elite PI2 format.

Here are two ways, one is very easy, the other a little more techy.


Method 1 - Easy web browser based
 
Browser based Javascript tool made by Percy of Light.
  1. Convert your image to 640*400 truecolour with your favourite graphics tool
  2. Scale the image to 640*200 (it will have the wrong aspect ratio, but the ST will double the lines!)
  3. Save as 24-bit PNG
  4. Start Animas IMENHANCE
  5. Set it up like:
    • Colourspace: Atari ST (512 colour palette)
    • Screen size: 640x200
    • Max. colours: 4
    • Dither colour bleed reduction: Experiment yourself
    • Quantisation colour preservation: Experiment yourself
    • Luminance delta (flickering): Experiment yourself
  6. Once setup, select file and see the result.
  7. The last two images are valid (Quantised Atari ST Degas image and Quantised and dithered Atari ST Degas image)
  8. Save the one you like best and submit your entry!
Good luck!




Method 2 - Expert Java commandline based
 
Commandline Java tool made by Troed of Sync.
  1. Convert your image to 640*400 truecolour with your favourite graphics tool
  2. Scale the image to 640*200 (it will have the wrong aspect ratio, but the ST will double the lines!)
  3. Save as 24-bit PNG
  4. Download the tool from: https://github.com/troed/PNGconv
  5. Convert your saved PNG image with the following commandline
      java -jar PNGconv.jar shphoto.png shphoto.pi2 medium -512 -header
  6. Submit your entry!
Thanks to Dma-Sc for the tip!

Good luck!