enginestar Posted December 17, 2020 Share Posted December 17, 2020 Say I have a JPG I want to increase the size of the canvas How can I then save the file as a jpg - without losing quality? If I choose 100% I can end up with a big file. If I choose less quality, I lose quality. JPG - by definition optimises and reduces file size (correct me if I'm wrong). I get that. But then I can use a program like Windows Paint and increase the canvas without compromising the file size or quality. Am I missing something? Thanks. Quote Link to comment Share on other sites More sharing options...
gurunath Posted December 17, 2020 Share Posted December 17, 2020 Hi, To increase canvas size, just go to "Document - Resize canvas". It has options to let you resize as you want. As regards getting a jpeg, you can't save as jpeg, you have to export as jpeg. But you probably know that already. I have noticed that just reducing the quality to 90% reduces the file size to a large extent without appreciably reducing the quality. Also, if you're still concerned, change the resampling option to bicubic or lanczos instead of the default bilinear. Hope this helps. Quote Link to comment Share on other sites More sharing options...
Pšenda Posted December 17, 2020 Share Posted December 17, 2020 4 hours ago, gurunath said: As regards getting a jpeg, you can't save as jpeg, you have to export as jpeg. But you probably know that already. No, if Open JPEG, then Save JPEG. See "pencil" note: https://affinity.help/photo/en-US.lproj/pages/GetStarted/save.html 6 hours ago, enginestar said: But then I can use a program like Windows Paint and increase the canvas without compromising the file size or quality. Really? With lossy JPEG file? 6 hours ago, enginestar said: If I choose 100% I can end up with a big file. With lossy JPEG, even 100% (best quality) is still a loss of quality. You would need to use the lossless JPEG2000 (JPEG-LS). Quote Affinity Store (MSI/EXE): Affinity Suite (ADe, APh, APu) 2.4.0.2301 Dell OptiPlex 7060, i5-8500 3.00 GHz, 16 GB, Intel UHD Graphics 630, Dell P2417H 1920 x 1080, Windows 11 Pro, Version 23H2, Build 22631.3155. Dell Latitude E5570, i5-6440HQ 2.60 GHz, 8 GB, Intel HD Graphics 530, 1920 x 1080, Windows 11 Pro, Version 23H2, Build 22631.3155. Intel NUC5PGYH, Pentium N3700 2.40 GHz, 8 GB, Intel HD Graphics, EIZO EV2456 1920 x 1200, Windows 10 Pro, Version 21H1, Build 19043.2130. Link to comment Share on other sites More sharing options...
enginestar Posted December 18, 2020 Author Share Posted December 18, 2020 Thanks for the replies. None of this makes sense. ALL I want to do is append white space to the jpg. I don't want to 'recreate' a jpg. Paint on Windows 'seem's' to do this. (I could be wrong.) Quote Link to comment Share on other sites More sharing options...
Fixx Posted December 18, 2020 Share Posted December 18, 2020 So add white space either manually with crop tool or numerically with Canvas size -command. Simple save will overwrite your old file with 100% quality JPEG. With Export you can choose quality/size ratio. Admittedly people say AP JPEG quality is not the best so for best quality/size ratio other tools are better. Quote Link to comment Share on other sites More sharing options...
Pšenda Posted December 18, 2020 Share Posted December 18, 2020 6 hours ago, enginestar said: ALL I want to do is append white space to the jpg. Just write in the question, and you will be answered correctly. https://affinity.help/photo/en-US.lproj/pages/SizeTransform/canvasSize.html Anchor point to Center, add size with desired space (x2). Quote Affinity Store (MSI/EXE): Affinity Suite (ADe, APh, APu) 2.4.0.2301 Dell OptiPlex 7060, i5-8500 3.00 GHz, 16 GB, Intel UHD Graphics 630, Dell P2417H 1920 x 1080, Windows 11 Pro, Version 23H2, Build 22631.3155. Dell Latitude E5570, i5-6440HQ 2.60 GHz, 8 GB, Intel HD Graphics 530, 1920 x 1080, Windows 11 Pro, Version 23H2, Build 22631.3155. Intel NUC5PGYH, Pentium N3700 2.40 GHz, 8 GB, Intel HD Graphics, EIZO EV2456 1920 x 1200, Windows 10 Pro, Version 21H1, Build 19043.2130. Link to comment Share on other sites More sharing options...
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