renamed_account_13401 Posted October 22, 2008 Share Posted October 22, 2008 Hello ThereI have a question here:Do you know which is the place I should edit to increase the image quality uploaded on my Prestashop store? It seems that the image quality from my shop are not the same (high quality) with the images I uploaded from my compter. I think prestashop changes the image DPI when uploading it. What should I edit in order to keep the same image DPI?Thanks. Link to comment Share on other sites More sharing options...
Paul C Posted October 22, 2008 Share Posted October 22, 2008 The different image resolutions used by the store are set in Preferences->Image. You can adjust them there, and the images will be created appropriately (may require regeneration).Paul Link to comment Share on other sites More sharing options...
Noxyd Posted January 26, 2009 Share Posted January 26, 2009 Sorry Paul, but in Preferences->Image, you can change the size, but not quality, it's very different.The image quality after resizing is very low, it would be very usefull to complete the resizing module with a quality cursor...Regards. Link to comment Share on other sites More sharing options...
Skipper Posted January 26, 2009 Share Posted January 26, 2009 Paul is right. Pixel dimensions is all that is needed for an online shop. The DPI, or more correctly PPI, are defined by the screen's hardware and are invariable, just like the DPI depends on the printers hardware. PPI typically varies between 72 and 85.If the perceived image quality decreases, then I would dare a bet that this is a problem in either the quality of the original image or in the concert between image resize dimensions and the template code, or more precisely the size parameters. Link to comment Share on other sites More sharing options...
Paul C Posted January 26, 2009 Share Posted January 26, 2009 It's a difficult one this. If your large image is a jpeg, then by definition it's compressed. A large image with 70% compression can look fine, but may start to blur if you then down-size this compressed image. The only way to prevent this would be to resize the original image (the source from your camera if it supports uncompressed RAW format) and once resized, THEN apply the jpeg compression (image quality setting). The minute you make an image smaller you've started throwing away information, and when you compress an image (using jpeg) you also throw away some information so there's no way the end result is going to be "high quality"!That said, as skipper points out, what the customer actually sees will depend on the capabilities of their display. Are the images really that bad, or are you maybe just expecting too much? Paul Link to comment Share on other sites More sharing options...
Noxyd Posted February 9, 2009 Share Posted February 9, 2009 Thank you, Paul was right, I confirm :- To increase photo's resolution, we have to adjust the px rate up to the original photo's size.- The restriction is to stay under the 2Mo (if someone knows how to increase it...? ).- So to have the best ratio quality/size/weight I had to resize the original to 2200x2200ppp and compress until being under the 2Mo barrel.- In the end I put 2200px in the preference/image.Sorry for my english, I hope you understood.Thanks to everyone.Arnaud Link to comment Share on other sites More sharing options...
eggdesign Posted November 25, 2011 Share Posted November 25, 2011 To solve this I just increased for example my product listing page images sizes to 300px x 300px in preferences - image settings. Then in my css file I reduced the image displayed to 150px x 150px. This displays the images at a better qulity (300px resized down to 150px) Link to comment Share on other sites More sharing options...
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