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the focal easy guide to photoshop cs 2 phần 3

Bạn sẽ sử dụng Layer Palette nhiều hơn bất kỳ bảng khác và nó sẽ lấp đầy một cách nhanh chóng khi bạn tạo layer mới. Bây giờ bạn có thể truy cập bất kỳ của bảng màu có thể nhìn thấy và cập cảng bằng cách bấm vào tab bảng đó. Hãy nhìn vào các bảng màu còn sót lại. | FOUNDATION Some notes on curves As with the Levels dialog you ll learn more about the use of the Curves dialog with individual-color channels auto color and eyedroppers in the Advanced Options chapter. Ch aff by auto color Eyedroppers Precise input curve from Large small curves dialog and output values brightness to ink density Also make the Curves dialog as large as possible. Do this by selecting the Large Small icon in the lower right of the dialog box. In grayscale images Photoshop reverses the direction of the curve gradient from light to dark rather than dark to light . Use the icon in the center of the gradient to switch the direction of the gradient. I prefer a dark to light direction. Some sample curves There are many different types of edits you can perform with the curves tool. In fact some Photoshop gurus claim they can do almost everything using curves. Here are a couple of basic examples for changing image brightness and adding contrast. To change image brightness open the Curves dialog create a curves adjustment layer click near the center of the Curve line to create a point and drag the point up. This makes the pixels in the image brighter. 35 THE FOCAL EASY GUIDE TO PHOTOSHOP CS2 To add contrast to the image open the Curves dialog click on the curve to create a point at the quarter-tone of the image about of the way from the white point and another at the three-quarter tone of the image about of the way from the black point . Move the quarter-tone point upward brightening the brighter pixels of the image . Move the three-quarter point downward darkening the darker pixels of the image . Now we have a classic S-curve. Contrast is added by darkening the dark pixels and lightening the bright pixels. The S-curve preserves the values of the black and white points in the image it doesn t push any pixels to pure black or pure white. This is why you should use the Curves dialog to adjust Contrast not the Brightness Contrast dialog. Very small adjustments .