High- and mid-range cameras often take pictures in the RAW format. This format is not compressed and hense are not saved as JPG images. The good part about this is that images can be compressed in a format which does not compromise quality. The bad part about this is that they require an image editor capable of dealing with RAW images.
RawTherapee is a free graphics editor for RAW images. It can open and edit photographs created by high-end cameras like Nikon, Sony, Canon, etc. The most common formats are NEF, DNG and others. If you don't have a camera which produces RAW images, it can also open and edit JPEG or TIFF images.
The file browser lets you view images before you open them. The previews it generates are of high quality, it even includes a scoring system for classifying images.
RawTherapee provides a lot of high quality image editing features for free and even outperforms some of the expensive RAW photo editors available.
From RT Team:RawTherapee involves the concept of non-destructive editing, similar to that of some other raw conversion software. Adjustments made by the user are immediately reflected in the preview image, though they are not physically applied to the opened image but the parameters are saved to a separate sidecar file. These adjustments are then applied during the export process.
All the internal processing is done in a high precision 32-bit floating point engine.RawTherapee 4.2.74
is licensed as Freeware
for the Windows operating system / platform without restrictions. RawTherapee is available to all software users as a free download (Freeware).
RawTherapee Virus and Malware Tests:
For security reasons, you should also check out the RawTherapee virus and malware test
that has been uploaded; additional RawTherapee screenshots may be available, too.