Mit dem Radical Image Optimization Tool gibt es ein vielseitiges und vor allem kostenloses Programm zum konvertieren und Verändern von Bildern.
Bilder einer Digitalkamera sind i.d.R. mehrere MB gross. Will man sie z.B. auf eine Webseite laden, müssen sie von der Grösse reduziert werden. Das RIOT eignet sich besonders gut, weil gleich mehrere Bilder auf einmal bearbeitet werden können.
DownloadMain features:
* open many image types including rare/scientific types
(up to 128 bpp, integer and floating point).
* 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)
Grüsse
Alexander
