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Professional Information Technology-Programming Book part 20

Tham khảo tài liệu 'professional information technology-programming book part 20', công nghệ thông tin, kỹ thuật lập trình phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | shadows. High-key interpretations of an image tend to look dreamy glamorous and idealized. That s one of the reasons they keep cropping up as a fad in fashion female portraiture and cosmetic ads. However high-key images can be equally effective in creating a dreamy or foggy landscape or romantic wedding photo. One precaution any image that is destined to be interpreted as high-key should be adjusted in RAW so that all the detail falls inside the borders of the Histogram. In other words you don t want to see any more blocked detailespecially in the highlightsthan absolutely necessary even though you may decide it s appropriate when you finalize the adjustments in Photoshop. The Camera Raw Histogram should look something like the one in Figure 4-42. Of course this is an ideal Histogram for virtually any type of RAW file exposure interpretation. But it s more important here because if highlight detail is blocked to begin with there will be even more detail blocked when you use Photoshop to further interpret the image as high-key. Figure 4-42. The ACR adjustments and Histogram of a high-key interpretation. It would seem that the no brainer way to create a high-key version of the image would be to simply drag the Exposure slider far enough to the right. The problem with that is you push a lot of the brightest details which are precisely the ones you want to keep right off the edge of the Histogram. That means those highlights are blocked and you won t be able to see any detail in the area where it is most important to have it. Now let s try an interpretation that keeps detail in the highlights although perhaps not as much as we d have in a normal or low-key interpretation and in which there are at least enough blacks to keep the image from looking like it was a mistake. Then go to the Curves tab and select Linear from the Tone Curve menu. The Linear curve is superimposed over the image s Histogram. At the point where the Histogram reaches the greatest height has the .