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Google reports a 64% reduction in file size for images converted from animated GIFs to lossy WebP, however, with a very noticeable visual impact, both at default settings, and optimised settings. When converting using lossless WebP, a 19% reduction is achieved as reported by Google, [ 28 ] although real world performance is nearer to 10%.
Like any resampling operation, changing image size and bit depth are lossy in all cases of downsampling, such as 30-bit to 24-bit or 24-bit to 8-bit palette-based images. While increasing bit depth is usually lossless, increasing image size can introduce aliasing or other undesired artifacts.
dir-tree, search results Yes Yes name, date, file size, image width/height, type, user-defined KPhotoAlbum: Yes Yes Yes fit, in/out, presets Yes views search results by date Phase One Media Pro: Yes Yes Yes Fit to viewing area/height/width, 1:1, zoom to 1600% Yes Yes Yes, user-defined Yes Database
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This characteristic sometimes results in a smaller file size for some lossless formats than lossy formats. For example, graphically simple images (i.e. images with large continuous regions like line art or animation sequences) may be losslessly compressed into a GIF or PNG format and result in a smaller file size than a lossy JPEG format.
Results may include similar images, web results, pages with the image, and different resolutions of the image. Images on Google may take anything between 2–30 days to index if they are properly formatted. The precision of Search by Image's results is higher if the search image is more popular. [22] Additionally, Google Search by Image offers ...
Compressing drawings or diagrams with JPEG results in an image of poor quality, because the human eye can spot the compression artifacts around the edges. Another drawback is the large file size you will end up with. JPEG compression has many options but most commonly only two colour spaces: 24-bit RGB (8 bits per sample) and 8-bit greyscale.