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JPEG format. I recommend that you keep your photo settings in High Efficiency unless you see a noticeable difference in photo quality.)
The general rule is to use JPGs for photographs, images that don't have a transparent background, and other memory intensive files. And to choose PNGs for graphics, files with transparent backgrounds, and other images where clarity and color vibrancy are important.
Because of their different compression processes, JPEGs contain less data than PNGs — and therefore, are usually smaller in size. Unlike JPEGs, PNGs support transparent backgrounds, making them preferred for graphic design.
The biggest advantage of PNG over JPEG is that the compression is lossless, meaning there is no loss in quality each time it is opened and saved again. PNG also handles detailed, high-contrast images well.
I'm using a background image, and I would like it to weigh little without losing quality.
I found this option in Xcode.
Project-> Packaging -> Compress PNG Files
This would help me to improve file sizes?
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