adyga Posted March 4, 2006 Share Posted March 4, 2006 Hi allI need some ideas on how do I check if my image is truly losslessly compressed ?because I doing an archive of more than 2000 analog images, with 300dpi 600dpi and 1200dpiI am currently using PNG.I wanted to check if PNG is lossless in addition to JPEG2000LC.help is greatly appreciated. Link to comment Share on other sites More sharing options...
spazmire11 Posted March 4, 2006 Share Posted March 4, 2006 well i think a checksum generator would be usefull here basicly,convert image to whatever formatconvert the image back to the same format it was incompare the two checksumsthat might do it, however i realy see no point to it if you cant tell the diffrence Link to comment Share on other sites More sharing options...
adyga Posted March 4, 2006 Author Share Posted March 4, 2006 Thanks spazmire11 for your interestwell i think a checksum generator would be usefull here basicly,I think its a great idea to begin with.however i realy see no point to it if you cant tell the diffrence maybe eye cant catch the difference but with a noisy little-grainy analog images and constant save and close it will lose some detail that might be usefull in the future, maybe to do a hologram of ancestors ? Link to comment Share on other sites More sharing options...
LLXX Posted March 16, 2006 Share Posted March 16, 2006 Save it as BMP, open that BMP and convert to PNG, then save that PNG as BMP (of same settings).Now FC the two bitmap files and they should be byte-identical.If I remember correctly, JPG at 100% is still slightly lossy due to the DCT process used. Link to comment Share on other sites More sharing options...
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