Photoshop CS5_tập 7

Tham khảo tài liệu photoshop cs5_tập 7, công nghệ thông tin, đồ họa - thiết kế - flash phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả
Nội dung trích xuất từ tài liệu:
Photoshop CS5_tập 7 7 Defining the highlight and shadow7 With the highlight eyedropper ( ) selected, hover over the image and hold down the Alt/Option key, causing the image to again display in the posterized view. Here is where it might get tricky: add the Shift key to this configuration, your cursor changes into the Color Sampler too ( ). Click on the light area you can find in the logo art. A color sample appears on the image, but no change has yet been made to the image. Add a color sample to mark the lightest point in the image. If necessary, you can reposition the Color Sample by holding down the Shift key and dragging it to a newlocation.8 Make sure that the Set White Point eyedropper is still selected, and click on the color sampler you just created on the logo art. This has now defined this area of the image as the lightest point of the tone curve and is adjusted to your newly defined highlight color values. If this gives you unexpected results, you might have missed the color sampler.You can undo by pressing Ctrl+Z (Windows) or Command+Z (Mac OS), and then try clicking on the white area of the logo art again. Keep in mind that the color sample that you dropped is only a marker; you do not have to move the sampler to change the highlight. Now you will set the black, or darkest, part of your image.9 Before you begin, press Ctrl+0 (zero) (Windows) or Command+0 (zero) (Mac OS) to make the image fit in the window. Lesson 7, Creating a Good Image 1917 Defining the highlight and shadow 10 Select the shadow slider ( ) on the Curves Adjustments panel, and hold down the Alt/ Option key and drag the slider towards the left. When dragging the slider (slowly), notice that clipping appears, indicating (with darker colors) the shadow areas of this image. Notice that there are many shadow areas in this image, but we want to focus on the subject matter (the small boy). Slide to the left until you see the shadow areas increase in the folds of the boy’s clothing, and then release. To see the darkest parts of this image, hold down the Alt/Option key and slide the shadow slider to the right. Depending upon the input device you might have, many areas display as the darkest areas of an image.This is an indication that the input device, whether a scanner or camera, does not have a large dynamic range of tonal values that it can record.You might have to take a logical guess as to what is the darkest part of the image.192 Adobe Photoshop CS5 Digital Classroom 7 Defining the highlight and shadow11 Make sure that the Set Black Point eyedropper is selected, and then hold down the Alt+Shift (Windows) or Option+Shift (Mac OS) keys and click on the darkest shadow area to leave a color sampler To see the darkest parts of this image, hold down the Alt/Option key and slide the shadow slider to the right.12 With the Set Black Point eyedropper still selected, click on the color sample that you dropped on the image. This has now been set as the darkest area of the image, using the values you input earlier in this example. You should already see a difference in the image—a slight color cast has been removed and the colors look a little cleaner—but you are not done yet. The next step involves balancing the midtones (middle values) of the image.13 Leave the Curves Adjustments panel visible for the next exercise. Lesson 7, Creating a Good Image 1937 Adjusting the midtones Adjusting the midtones In many cases, you need to lighten the midtones (middle values of an image) in order to make details more apparent in an image. 1 Select the center (midtone area) of the black curve and drag downwards (don’t worry about the colored curves, as Photoshop is making an overall change in this window). Move the curve downwards slightly to l ...