I wanted to try recreating the behavior you described but I had a few questions before I tested. I was wondering what the pixel dimensions were of the image that you had exported from PS CS5, the largest supported in PS Touch is 1600x1600. I can save at max quality but just want to ensure I was doing something similiar before I started. Also, did you have to resize the image during the import process? I'll test based on your answers.
Many thanks for coming back to me.
My test was of muliple sizes all exceeding 1600 in either one or both dimensions. Any camera still is unlikely to fit within the constraints of a 1600 square. I will try today if I have time to 'cookie cutter' a 1600 square from the marcie to test.
It's a fair possibility that the rescale is responsible for the artifacts I am seeing. This would tie up with the popular forum frustration of low quality exports.
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I have done another test where i have 'cookie cut' a 1600x1600 square from
the marcie test frame. Again this was exported from cs5 as a max quality
When imported into ps touch i do not see any compression or resolution
This strongly points to a problem with resizing on import.
What are your findings?
For my test I created 3000 x 24000 pixel image then created a 1 pixel line that was perfectly vertical and close to the height of the image. From there I rotated it over and over 5 degrees with the center of screen being the fulcrum. After which I saved the source image as a high quality jpeg. Then I tested importing and resizing it to 1600 x 1600 in both PS Touch and Photoshop CS5. In Photoshop CS5 it was 53% reduction using the bicubic algorithm to fit within the 1600x1600 canvas. I definately saw quality loss when importing and downsampling to 1600 x 1600 in PS Touch that I wasn't seeing in Photoshop CS5 when performing a similiar downsizing process.
Thanks posting about this I'll share my finding with the product team.
I look forward to the update