The color information will drastically reduce as you choose a higher level and the file size will decrease. With JPEG you get to set the quality level as well as select the desired chroma sub-sampling (storing of color information at a lower resolution): none (4:4:4), low (4:2:2), medium (4:2:0) and high (4:2:1). You have control over the quality of the resulting file regardless of the output format chosen. The application will automatically put its compression abilities to work the moment you load a picture. It can detect that multiple elements have been added and it will automatically open the batch optimizer window. It does not matter if you drop one item or a bunch of them because RIOT can also optimize them in batches. Loading up the pictures is an easy task as the program comes with “drag and drop” support. RIOT can export your pictures to web-friendly JPEG, GIF or PNG, but the input formats supported include common bitmap images, Adobe Photoshop’s PSD, some popular HDR types and a few RAW camera images. Each move is immediately reflected in the preview pane and file size information is updated on the spot. You have a dual-pane structure comparing the initial image with the optimized result in the lower part of the screen there are all the knobs you need to adjust the settings in order to achieve the result you want. Also, the application window is filled with details, such as file size, about the original item as well as the processed one.
The interface is simple and straightforward, with all the options in plain view. RIOT, or Radical Image Optimization Tool by its full name, is free of charge and does not take much time to install but you have to be careful during the process unless you want to install third party code that does nothing to help you with image compression. Its purpose is to shrink the size of the original images without taking too much of their quality.
Image optimization may seem for many a matter of size over quality, but as far as RIOT is concerned it is more like an undetectable compromise between the two.
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