Portable RIOT 0.6.1
RIOT is an application that enables you to reduce the size of your images for your websites. RIOT has an easy to use interface to compare the original with the optimized image in real time and instantly see the resulting file size. The image optimizer is lightweight, fast and simple to use, yet powerful for advanced users. The interface of the tool is clean and simple. You can import images by using the file browser or the “drag and drop” method (batch processing is also supported).
You have several options at your disposal, according to the file format – JPEG, GIF or PNG. So, you can configure JPEG options (e.g. adjust quality, select the chrome subsampling, apply a grayscale filter), metadata settings (e.g. remove IPTC info and the EXIF profile) and make image adjustments (e.g. brightness, contrast, gamma).
open many image types including rare/scientific types
save and optimize JPEG, GIF and PNG with a simple, clean user interface
automatic optimization selects the most suitable format and parameters
works in dual view: (original – optimized image) or single view (optimized image).
automatic preview of resulting image
in-place compare function (alternativelly display the original image over the optimized image to notice small pixel changes)
compress files to desired filesize threshold
fast processing (all is done in memory);
see instant results including resulting filesize
batch support (process multiple files at once)
transparency handling options
decide if you want to keep metadata (comments, IPTC, Adobe XMP, EXIF profiles, ICC profiles).
Unsupported metadata is removed
transfer metadata between image formats (destination format must support them)
common tools: pan and zoom, rotate, flip
basic image adjustments: brightness, contrast, gamma, invert
visually reduce number of unique colors for PNG and GIF images in order to reduce filesize
(two quantization methods are available: Xiaolin Wu and NeuQuant neural net)
resize image by using well known resample filters (ex: Lanczos3, Catmull Rom, Bicubic, and others)
out-of-the-box support for external PNG optimizers (optipng, pngout, etc)
the compression and the results are comparable to those of commercial products, even higher.
Adaptive logarithmic tone mapping algorithm (Drago) used for HDR images
+ added support for Gimp 2.10 in the plugin installer
* fixed a bug in batch mode where in certain conditions optimized files don’t get written
* fixed memory leak when opening the batch window, which also caused Access Violation in host applications if used as plugin
* fixed issue with saving of zoom factor
* fixed default batch window size not showing Settings button in certain situations
* fixed Compress to Size button not always enabled when needed
* minor UI fixes
– removed feature to toggle “Report file size changes” from batch settings. It is on by default
– removed menu item for Help Context. Docs will be moved to the website