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by garik

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visits member for 3 years, 5 months
seen Apr 10 '13 at 19:40

Dec
20
comment How can I restore analog pictures destroyed by airport X-Rays?
+1 for "It would help center if your scans are 16 bit". More bits in this specific case may help with the preserving quality when you do the image-processing.
May
27
comment Are “Windows Photo Viewer” rotations lossless?
@MattGrum, very cool demo. I hope all digital camera makers have their image sizes in integer multiples of 8!
May
27
comment Are “Windows Photo Viewer” rotations lossless?
(to beat a dead horse) EX: a lazy programmer might read a jpeg in as a matrix; then do a matrix rotation; corrupt some of the pixels; then save the image as jpeg again --> so in this example the specific program does a lossy rotation even though it's possible to do a lossless rotation.
May
27
comment Are “Windows Photo Viewer” rotations lossless?
@ArdaXi, I agree the answer to this question is dependent on what is "possible". But again... to answer the question completely you don't need to talk about "what is possible" because the question is only asking about "what does a specific program do". --> If something is possible... there is no gurantee a specific program will do what is possible... it's all up to implementation. The behavior of a specific program could easily NOT do what is possible.
May
27
comment Are “Windows Photo Viewer” rotations lossless?
For me, if you delete the .meta file (which is created next to the image) the photo gets display by picasa viewer as un-rotated. so ya... it isn't rotating the image but just sees in meta data "display as rotated".
May
24
comment Are “Windows Photo Viewer” rotations lossless?
file size changing is suspicious. i don't have win7. someone should do a image diff: outcome should be completely black/white (make sure to check that there are no small values).
May
24
comment Are “Windows Photo Viewer” rotations lossless?
@MattGrum, you are answering the question "is it possible to do a lossless rotation on jpeg file"... which is NOT the question. the question is "can xyz program do a lossless rotation". I strongly suggest editing your answer to answer the right question (and suggest making it more concise...).
May
24
comment Are “Windows Photo Viewer” rotations lossless?
Google Picasa image viewer IS lossless. but it cheats. it doesn't rotate the image. it just marks down in meta data "display this image rotated".
May
24
comment Are “Windows Photo Viewer” rotations lossless?
Man I have ALWAYS wanted to know the answer to this question. IMO they SHOULD be. But most likely due to the JPEG standard... I don't think it is technically possible to make this operation lossless.