Make jpeg file size smaller1/17/2024 ![]() Most of the time, this kind of software is able to produce nearly identical-looking images with huge file-size savings. Incidentally, there's a whole class of software that does nothing except re-compress JPEG images with a more efficient algorithm. Typically, if you open a JPEG from your digital camera, then do nothing but re-save it as a JPEG with maximum quality, you'll see a 25-50% reduction in file size, or even more for an image with low detail. The in-camera JPEG compression of most digital cameras is pretty horrible, and tends to produce larger images than is necessary. ![]() Higher quality will preserve more detail in the saved image, but will also produce a larger file on disk. PixelSugar, like most image editors, lets you choose an image "quality" setting for JPEGs, which controls the tradeoff between file size and visual quality. This means some image information is discarded in order to save on storage space. When you open the saved JPEG version, it will be slightly different from the original (if you compared the value of every pixel to the original), but to your eyes, it should look nearly identical. Saving that image as a JPEG might produce a file that's only 2 million bytes, as the file has been "compressed" with some clever techniques that save space. In both cases, compression allows you to store data on disk with less bytes than it actually contains.įor instance, if you have an image that's 3000x2000 pixels, in RGB color mode, with 8 bits per pixel, then the total amount of data in that image is 18 million bytes (or 18 megabytes, abbreviated to 18MB). Lossless compression allows you to recreate the exact data you began with, byte for byte, while lossy compression attempts to get rid of data selectively, in a way that allows you to reconstruct something close enough to the original. What is JPEG? What is compression?Ĭompressing data means figuring out how to squish it so it takes up less space. However, this is a whole, big, hairy topic that we could discuss for hours, so here are some additional thoughts, if you're inclined. The SHORT answer is this: saving at 90%-ish in PixelSugar (the default) will produce a good quality JPEG that's visually indistinguishable from the original, a larger JPEG file size doesn't necessarily mean better quality, and if you are concerned about maximum quality, save as a TIFF. If dimensions are the same, why are file sizes so vastly different? ![]() Saved on drive shows 3.7MB for PixelSugar vs 17MB original. When I look at image size in photoshop, the dimensions are the same(4160圆240 pixels).
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |