Search found 9 matches

by loupasc
2017-06-13T05:16:55-07:00
Forum: Developers
Topic: Upscaling algo discussion
Replies: 16
Views: 20742

Re: Upscaling algo discussion

Hello magick,

Ok I will check how perform my proposed algorithm compared to the magnify command, I add this to my todo list.

No, ICBI isn't arbitrary scale. According to the following link http://www.andreagiachetti.it/icbi/InterTIPmod2c.pdf ICBI seems to double the image dimensions.
by loupasc
2017-06-13T01:10:33-07:00
Forum: Developers
Topic: Upscaling algo discussion
Replies: 16
Views: 20742

Re: Upscaling algo discussion

Is the algorithm restricted to 2X upscaling? Does it not support arbitrary upscaling? Instead of 128x128 upscaling to 256x256, could the algorithm instead upscale to 400x400, as an example? If so, can you update the code base to support arbitrary widths and heights? Hello magick, This upscaling met...
by loupasc
2017-06-06T01:02:48-07:00
Forum: Developers
Topic: Upscaling algo discussion
Replies: 16
Views: 20742

Re: Upscaling algo discussion

Ok, I'm glad to make my contribution to ImageMagick and I will keep watching this topic in case you need something.
by loupasc
2017-06-05T07:36:56-07:00
Forum: Developers
Topic: Upscaling algo discussion
Replies: 16
Views: 20742

Re: Upscaling algo discussion

Hello magick, The C code is now available, see http://www.fraktales.net/photoprocessor/source/ Upsample is performed by the applyDiamondUpscale function. inputs: - width/height dimensions of the input image. - bitmap greyscale image represented by an array of unsigned char. - threshold value (%) use...
by loupasc
2017-06-04T05:11:15-07:00
Forum: Developers
Topic: Upscaling algo discussion
Replies: 16
Views: 20742

Re: Upscaling algo discussion

Below image samples 4x upsampled using my method and Sigmoidized version of Lanczos. http://www.fraktales.net/photoprocessor/sample/bloodmoney1.jpg http://www.fraktales.net/photoprocessor/sample/bloodmoney2.jpg http://www.fraktales.net/photoprocessor/sample/hats1.jpg http://www.fraktales.net/photopr...
by loupasc
2017-05-29T06:32:48-07:00
Forum: Developers
Topic: Upscaling algo discussion
Replies: 16
Views: 20742

Re: Upscaling algo discussion

Hello, I added four sample pictures in order to show how my implementation performs upscaling: - http://www.fraktales.net/photoprocessor/nofilter_bloodmoney.html - http://www.fraktales.net/photoprocessor/nofilter_lena.html - http://www.fraktales.net/photoprocessor/nofilter_perspective.html - http://...
by loupasc
2017-03-29T00:50:03-07:00
Forum: Developers
Topic: Upscaling algo discussion
Replies: 16
Views: 20742

Re: Upscaling algo discussion

Ok, fine !
by loupasc
2017-03-28T00:55:36-07:00
Forum: Developers
Topic: Upscaling algo discussion
Replies: 16
Views: 20742

Re: Upscaling algo discussion

Hello fmw42, The upscaler is implemented using Java; indeed I can convert it to C. I have to work deeper on the implementation because my current code is far from optimal (CPU and memory usage); but optimization can be done later :mrgreen: I will have a look on the MagickWand C API in order to do a ...
by loupasc
2017-03-27T05:21:59-07:00
Forum: Developers
Topic: Upscaling algo discussion
Replies: 16
Views: 20742

Upscaling algo discussion

Hi ImageMagick team, First I present myself, quickly :) I do photograph and sometimes I print my picture; sizes can be up to 90x60cm. I discover ImageMagick just by chance. The first times I printed my picture I wasn't satisfied of the result after upscaling; then I looked for algorithms to upscale ...