Yossarian Dogovitch Posted October 17, 2023 Posted October 17, 2023 Hello everyone, I have noticed that AP(ver 2) saves very large jpgs . As an example : I open a jpg which is originally 11,4 MB and without any manipulation to it save it. The file size is 15,9 now. If any ajustments are done to the photo the size grows to 18, 19 , 22 MB . I do not understand it . The issue makes me to compress the file and reduce resolution Does any one knows why is it so and how to avoid it ? Regards Leszek Quote
NotMyFault Posted October 17, 2023 Posted October 17, 2023 Jpeg compression algorithms and parameters can vary between vendors/apps. affinity is known for creating larger files vs. other apps even when using same jpeg quality parameter. Adjustments like sharpening will create more details, and this always leads to lower compression. The growth is explainable, not exactly a bug. Quote Mac mini M1 A2348 | MBP M3 Windows 11 - AMD Ryzen 9 5900x - 32 GB RAM - Nvidia GTX 1080 LG34WK950U-W, calibrated to DCI-P3 with LG Calibration Studio / Spider 5 | Dell 27“ 4K iPad Air Gen 5 (2022) A2589 Special interest into procedural texture filter, edit alpha channel, RGB/16 and RGB/32 color formats, stacking, finding root causes for misbehaving files, finding creative solutions for unsolvable tasks, finding bugs in Apps. I use iPad screenshots and videos even in the Desktop section of the forum when I expect no relevant difference.
Dan C Posted October 17, 2023 Posted October 17, 2023 24 minutes ago, Yossarian Dogovitch said: As an example : I open a jpg which is originally 11,4 MB and without any manipulation to it save it. The file size is 15,9 now. It's possible that this size increase is due to metadata being exported with the JPEG from Affinity, which may not be included with the original image. The same is true for the Colour Profile, which may not be embedded in the imported image. I'd recommend unticking the relevant options for embedding metadata and colour profiles when exporting your images in order to maintain a smaller file size - though do please note that the above information is still correct and image sizes are bound to change based on the composition of the image, the export compression & algorithms used, etc, all of which is expected behaviour and not a bug. I hope this clears things up Quote
walt.farrell Posted October 17, 2023 Posted October 17, 2023 At one time, and possibly still now, when you Open a JPG and Save it the Affinity applications were using 100% Quality. This will cause a size increase if the original JPG was saved with a lower Quality setting. The actual Quality used is not saved with a JPG, and can only be estimated by later applications. So Affinity chooses to use 100%, I believe. Quote -- Walt Designer, Photo, and Publisher V1 and V2 at latest retail and beta releases PC: Desktop: Windows 11 Pro 23H2, 64GB memory, AMD Ryzen 9 5900 12-Core @ 3.00 GHz, NVIDIA GeForce RTX 3090 Laptop: Windows 11 Pro 23H2, 32GB memory, Intel Core i7-10750H @ 2.60GHz, Intel UHD Graphics Comet Lake GT2 and NVIDIA GeForce RTX 3070 Laptop GPU. Laptop 2: Windows 11 Pro 24H2, 16GB memory, Snapdragon(R) X Elite - X1E80100 - Qualcomm(R) Oryon(TM) 12 Core CPU 4.01 GHz, Qualcomm(R) Adreno(TM) X1-85 GPU iPad: iPad Pro M1, 12.9": iPadOS 18.5, Apple Pencil 2, Magic Keyboard Mac: 2023 M2 MacBook Air 15", 16GB memory, macOS Sequoia 15.5
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.