Play around with the 'Quality' tab and the 'Subsampling' options until you get your desired file size with acceptable image quality. See if you can maintain the image quality with a lowered file size. Step 6: Click on 'Advanced Options' and from the 'Subsampling' menu, experiment with selecting 'Chroma Halved' and 'Chroma Quartered'. Step 5: Lower the 'Quality' setting and see if you are able to get your desired file size with an acceptable image quality. You should now be able to see the current file size and an image preview. Step 4: In the resulting dialog box, check the 'Show preview in image window'. Eg: image-name.jpg and then click 'Export'. ![]() Step 3: In the 'Name' field, add a name to your file ending with a '.jpg'. Step 1: Open Gimp and Go to 'File > Open' and open the image that you want to optimize. Here are the steps on optimizing JPEG images using Gimp: ![]() Gimp does a pretty good job of optimizing JPEG images without the need for any additional plugins. I have also written an article on PNG optimization which you can check out if you want information on the best open source tools to optimize PNG images. ![]() In this article we will be discussing JPEG optimization using open source tools like GIMP, PhotoWorks and RIOT. In addition to that, you can also implement chroma subsampling which allows one to reduce the chroma information as compared to the luma information taking advantage of the human eye's lower sensitivity for color differences as compared to the luminance. The best part about JPEG is that you can adjust the degree of compression and thereby reduce the size of the image with acceptable loss to the overall image quality. JPEG format is best suited for displaying images that have a large array of colors.
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