![]() I usually adjust the mask to fully block stars and highlights and allow 80% to apply to the background. So my normal approach is to is use a reversed luminance mask to apply noise reduction. There were no settings where the stars were not chewed to bits! So clearly Topaz is not a solution for all images.Īs you mention, it doesn’t make sense to apply noise reduction to areas that contain sufficient signal sample to begin with. for color adjustment(removal) I would use LAB color mode since you want to keep the luminance or lightning but just want the erase the color yellow. The smaller stars are totally destroyed in the few images I tried processing.Īfter the positive results with my NGC5566 data I tried the new model on M14. The new Low Light mode is intended for challenging lighting conditions with lots of noise. This is for denoising smooth surfaces Severe Noise is, as the name implies, for addressing excessive noise from high ISO. I'm not sure it's an improvement over the previous versions. This is what Topaz describes as a well-rounded noise reduction coupled with detail preservation. In the Topaz GUI, the stars develop a slight pixelation effect that resembles under-sampling, and they are distorted around the edges after the image is saved. Join photographer and workshop leader Joe Reardon for an in-depth session on using Topaz with luminosity masking in Photoshop. I tried the newest version, and I found that the Severe Noise model with Sharpening = 0 still chews up the stars, but in a slightly different way. The ability to turn off the AI sharpening completely is huge to me. It's great for dark/dusty nebulae, maybe better than anything else out there? However, I don't want Topaz touching my stars or the midtones/higlights of the image, where the S:N ratio is already good. Generally, I'm impressed with what Topaz can do for problematic noise in the sky background and the shadows of the images. That's exactly how I have used Topaz AI on a few of my images, except I use a 50/50 blend of Topaz and standard noise reduction to achieve a natural-looking result that is somewhat less noisy the the standard NR permits by itself. ![]() If you used the luminosity blend mode but do want the color in some places, you can duplicate the DXO layer, set it to color blend mode and use a layer mask where needed. ![]() This will give the noise reduction benefit without the unwanted color shift. "I typically apply noise reduction like this with either a mask or opacity of about 80% Leaving 20% of the noise seems to maintain the integrity of the image." Otherwise, put the DXO layer above the original in PS and set the blend mode to luminosity. I downloaded the latest version of Topaz AI and gave it a whirl. tons of presets, and a decent selection of rendering modes. Kevin, thanks for posting this information. Topaz AI, from Topaz Labs, is available for both Mac & PC and it has a wide suite of apps. ![]()
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