![]() In our last tutorial, we looked at the basics of editing, exposure, shadow/highlights and white balance. Being open source, it is free, but this does not mean that it is any less capable than it’s more expensive rivals. ![]() If you are just joining us, RawTherapee is an open source image management and RAW processing app for Windows, Linux and Mac. Our first installment, An Introduction to RawTherapee – A Free Photography Software Alternative to Photoshop, sparked a lot of interest and you can see the second tutorial featuring some basic editing techniques here. By reducing overall saturation on the first tab and then pushing it in the HSL tool, it made the effects of the individual color channel adjustments stronger.Welcome to our third tutorial on the basics of RawTherapee. There is virtually no green, aqua, blue, purple, or magenta in the image, so we made no adjustments at all to those color bands. This smoothed the transitions between each color band. The HSL adjustments in the red, orange, and yellow bands pulled the red and yellow areas towards orange, which is the predominant color in the photo. Here are screenshots of the two key tabs in Canon's Digital Photo Professional 4 with the adjustments I used. I also applied lens correction at the default settings for CA, color blur, and distortion. Here's what I got with Canon's DPP 4 using the default in-camera settings except for changing WB from 'Auto - ambience priority' to '3800K'.īy pushing brightness by 1/6 stop, changing the WB to 4600K with a slight tint towards magenta, crushing the shadows just a bit (to deal with a little noise in the very dark shadows, reducing contrast very slightly, and using the HSL tool to adjust individual colors (more on that below), I got the following result. Pulling exposure/brightness back requires a 2/3 stop adjustment to eliminate the brightest highlights from blowing out. There are a few areas where the highlights are blown, but any brute force attempt to pull them back will result in the mid highs also being flattened, and that's the major source of your banding. It looks like you tried to compress the dynamic range with ART and that's what caused such severe banding. The only lens correction was for 'Peripheral illumination' set at 70%.Īny attempt to flatten the highlights or boost the shadows will very quickly result in the banding you're seeing in your example above. Using Canon's Digital Photo Professional 4 to open your raw file, it seems your camera used the Standard picture style, a White Balance setting of around 3800K, no tint corrections, and a fairly neutral contrast curve (neither high contrast nor low contrast). and here's the straight-outta-ART image (again, scaled down for file size limits): Here's the embedded JPEG (scaled for file size limits): Is this just "Canon processing magic", or are there tools/techniques I should look into to try to match these? I tried comparing the relative color levels at a few points, and adjusting white balance and individual RAW black point levels for each channel, but I wasn't able to get anything close to the embedded JPEG. Obviously there's a way to get from the input RAW file to the embedded JPEG file, and I'd like to use that (or something very close) as a starting point for my edits. In the "straight-outta-ART" image, there are some clear bands present, the colors doen't transition smoothly, and there is a reddish cast present in some of these "banded" areas. In the embedded JPEG, the color transitions fairly smoothly from a bright yellow in the center of the fire to a saturated orange toward the top of the flames. Usually I've seen this on photos where there is a strong, vibrant orange present - such as a sunset or a fire. ![]() However, there are a handful of scenarios where I'm struggling to achieve the results I'm looking for. I've been using RawTherapee (and then its fork, ART) for several months, and overall I have been quite satisfied with it.
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