HDR 101 using Photomatix Pro - Page 3 - by Honez

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'Luminosity' boosts shadow details and overall image brightness. I usually like to crank this up a little to see what's hiding in the shadows. 'Black Point' and 'White Point' set the high and low clipping levels in the image. Again, I tweaked them slightly from the default. The 'Gamma' slider works in conjunction with 'Luminosity' and 'Black Point' and 'White Point' levels, controlling the middle range tones. I tend to end up playing with all four of these sliders at the same time until I get the right balance.

Next are the 'Color' tab options. 'Temperature' is the usual blue to the left, red to the right. I wanted to bring out the color of the wood and the red wheels, so I went a little towards the red end. Highlight and shadow saturation can be set independently, as well as globally on the Tone tab. I boosted the shadows a fair bit here.

The 'Micro' tab options control the contrast level of local details. The closest Photoshop equivalents I can think of to these are sharpening and noise reduction.

Boosting the 'Microcontrast' level sharpens things up, and 'Micro-smoothing' controls noise reduction.

The terms aren't exactly interchangeable, because the effect on the HDR image isn't the same as it would be in Photoshop.

It's hard to describe how they differ, just that they do things a little differently.

In my example I added some microcontrast to bring out the texture on the black part of the boiler.

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