In the first image, the Normal blend mode, in my opinion at least, produces a much better result. The three examples that follow illustrate the difference that this change can make. In the Layers palette, select the Curves adjustment layer you wish to alter then use the drop-down menu at the top of the palette to change the blend mode to Luminosity. This involves changing the ‘blend mode’ of the Curves adjustment layer to ‘Luminosity’ rather than ‘Normal’. While you could desaturate the image after applying the Curve, using a Hue/Saturation adjustment layer or similar, there is a better, more efficient way. the more deeply saturated colours will suit the parallel increase in contrast, but on other occasions you might want to increase the contrast without affecting the saturation. More often than not, this will produce an attractive final result i.e. One thing you may have noticed, especially when applying quite strong S-Curves to an image, is that in addition to increasing the contrast, these also increase the colour saturation.
#Topaz detail luminosity mode movie
If you can’t see the movie click here to view it in a new window.
#Topaz detail luminosity mode trial
While these Curves can be constructed through trial and error, and with experience you will be able to visually evaluate an image and have a rough idea of what your Curve should look like, there is an easier way of doing it, as illustrated by the following QuickTime movie (57s/812KB): If you take a look at the Curves for the second and third images you’ll see that the steep section of the Curve, the line between the two control points of the S-Curve, is in different places: the first Curve increases the contrast in the mid-tones – the details in his face and around his eyes – while the second increases the contrast in the highlights, bringing out the detail in his close-cropped hair. The first image, with no Curve applied, is a bit flat, and the third, though retaining good detail in his hair, is too dark and doesn’t really emphasize his features. Hopefully, you thought the middle image was the best. So how do you decide which areas of an image should fall within the steep part of the Curve? Take a look at the following examples, and before you look at the Curves decide which of the three you prefer: both ends of the curve become progressively more shallow as they move towards either the white point or black point. As we have previously noted, the steeper a curve the greater the increase in contrast, but when working with S-Curves not all of the Curve can be steep i.e.
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