Citar:

    * open many image types including rare/scientific types
    * save and optimize JPEG, GIF and PNG with a simple, clean user interface
    * 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

Input image types

    * common bitmap images as well as Adobe Photoshop PSD files
    * popular HDR formats and RAW camera images
    * rare/scientific types (up to 128 bpp, integer and floating point)