Hue and saturation
The color is the color of the color, and the adjustment of the color is to change in a variety of colors, each color represents a color. You can use the [color phase] | [saturation] command to adjust the color, saturation, and brightness of a single color component in an image. Select [Image] | [adjust] | [color phase/saturation] menu command to open the "color phase/saturation" dialog box shown in 3.19. The meanings of the options are as follows. Figure 3.19 hue/saturation dialog box l EDIT: select a range from the drop-down list. "Full graph" indicates that pixels of all image colors work, the remaining options indicate the effect on the pixels of a certain color component. L color: drag the slider or enter the color value of the image in the text box on the right to adjust the color of the image. L saturation: drag the slider or enter the saturation value in the text box on the right to adjust the saturation of the image. L brightness: drag the slider or enter the brightness value in the text box on the right to adjust the brightness of the image. L coloring: select this check box to replace the color in the original image with the same color. L: After selecting this tool, move to the image window and click. One of the optional colors serves as the basic range of color changes. L: after this tool is selected, move to the image window and click to add the color range of the current click to the original color change range. L: after this tool is selected, move to the image window and click to subtract the color range of the current click from the original color range. L color slide bar: There are two color bars in the dialog box, which represent the order of colors in the color wheel. The color slide bar above is the color sample. The color slide bar below is used to observe and set the color change range. Before 4.26 is not adjusted, the color of the two slide bars is exactly the same, however, after the three slide bars are adjusted, the color slide bar below will reflect the adjustment result. Tip: If you select the color check box, the gray image can be changed to a color image of a single color, or the color image to a single color of the image saturation refers to the color of the image, adjust the saturation, that is, adjust the color of the image. When the saturation is reduced to 0, it will become a gray image. Increasing the saturation will increase the color of the image. Follow these steps to adjust the image by using [color/saturation]: (1) first open the image to be adjusted [color/saturation], as shown in Figure 3.20, select image, adjust, and saturation to go to the color/saturation dialog box shown in Figure 3.20. Figure 3.20 open an image
(2) select any primary color of the six colors in the [edit] drop-down list box in the [color/saturation] dialog box. Tip: In the "edit" drop-down list, "full" indicates that all pixels are selected. "Red" indicates that red pixels are selected, and "Foreign red" indicates that foreign red pixels are selected. (3) After selecting the pixel to be adjusted, you can drag the slider on the slider to change the color, saturation, and brightness to adjust the display of the selected color pixels (for example, if you select red, it only works for Red ). (4) After the adjustment, click the OK button. The adjusted effect is shown in the right figure. Figure 3.21 adjust the color and saturation
3.2.2 color removal and Color Matching
1. The "de-color" command can use the "de-color" command to discard the color information in the image and convert the image to Gray Display. However, you must note that the "de-color" command only removes the color of the original image, instead of converting its color mode to grayscale, and the image is still in RGB color mode. 2. the "color matching" command "color matching" command is an image Adjustment Command added by Photoshop, you can use this command to match the color of the current image or the image in the current layer with the image in the next layer or other image files, it is often used in image synthesis to match two different colors.
Open two image files for color matching, and select the [Image] 4 [adjustment] 4 [color matching] menu command in the image window for color matching, the "color match" dialog box shown in 3.22 is displayed. The meanings of the options are as follows. Figure 3.22 matching color l image options: This column is used to adjust the brightness, color intensity, and fading degree of the image after the matching color. The "color intensity" option is used to control the intensity of the matching color, and the "Fade Out" option is used to control the effect after the matching color is mixed with the original image. When it is set to 100, the image does not change. When the [neutral] check box is selected, the neutral colors of the two images are matched. L image statistics: This column is used to set the source and layer of the image used to match the color. Other image files opened by Photoshop are listed in the "Source" drop-down list box. You can select an image file that matches the color. The thumbnail of the selected image is displayed in the preview box on the right, if the image to be matched contains multiple layers, you can specify the layer used to match the color image in the "layers" drop-down list box.
3.2.3 replacement color and optional color
1. The "replace Color" command allows you to easily use the "replace Color" command to replace selected colors. To replace the color in an image, perform the following operations: (1) open an image and select [Image] | [adjust] | [replace Color, open the replace Color dialog box, as shown in Figure 3.23. (2) First, select the area to replace the color from the selection group in the dialog box. The options are the same as those in the color range dialog box described in Chapter 2nd. (3) You can drag the [color phase], [saturation], and [brightness] slider in the [transform] area to change the color of the selected area. (4) Click OK to replace the selected color. Figure 3.23 color replacement 2. Optional color the [Optional color] command can adjust the ratio of C, M, Y, and K of the selected color to adjust the Dot Gain and color bias of the color. The optional color command is used as follows: (1) select [Image] | [adjustment] | [Optional color. (2) Select the color to be adjusted from the color drop-down list box in the displayed [Optional colors] dialog box, as shown in Figure 3.24. (3) then, you can adjust the proportions of C, M, Y, and K Based on the selected colors by using the four slide Bars: [Blue], [foreign Red], [yellow], and [Black ]. the dot gain and color bias of primary colors. The variation range of each slide is-100% ~ 100%. (4) After completing the settings, click OK. Figure 3.24 The [Method] Option group at the bottom of the [Optional colors] dialog box has two radio buttons. Their functions are as follows: l [relative]: the adjusted amount is calculated as the percentage of the total number of CMYK colors. For example, the percentage of a pixel in blue is 50%. After adding 10%, the total number is equal to 50% of the original amount plus 10% × 50%, that is, 50% + 10% × 50% = 55%. L [Absolute]: Adjust the color in absolute values. For example, a pixel occupies 50% of the percentage of blue, and after adding 10%, the total number is equal to the original amount of 50% plus 10%, that is, 50% + 10% = 60%. Note: Use the optional color command to ensure that the main channel is selected in the channel panel. The optional color command is available only when you view the main channel.
3.2.4 Channel Mixer and gradient ing commands1. The [Channel Mixer] command uses the "Channel Mixer" command to modify the color channel by mixing the color channels to produce the image synthesis effect. Select the [Image] 4 [adjustment] 4 [Channel Mixer] menu command to open the "Channel Mixer" dialog box shown in 3.25. The meanings of the options are as follows. Figure 3.25 channel mixed L output channel: select the color channel to be adjusted from the drop-down list box. L source channel: drag the slider on the slider with the mouse or enter a value in the Value box on the right to adjust the percentage of the source channel in the output channel. The value ranges from-200% ~ In the range of 200%. L constant: drag the slider with the mouse or enter a value in the Value box on the right to change the opacity of the output channel. The value ranges from-200% ~ In the range of 200%. When the input is negative, the channel color is black; when the input is positive, the channel color is white. L [monochrome]: select this check box to convert a color image to a grayscale image containing only the gray value. 2. The "gradient ing" command uses the "gradient ing" command to change the color of the image, and uses various gradient modes to adjust the color of the image. Select the [Image] 4 [adjust] 4 [gradient ing] menu command to open the "gradient ing" dialog box shown in 3.26. The meanings of the options are as follows. Figure 3.26 gradient ing l gradient used by grayscale ing: select the gradient to be used in the drop-down list box, you can also click the color box in the middle to open the "gradient Editor" dialog box to edit the required gradient color. L [imitation color]: select this check box to achieve jitter gradient. L [reverse]: select this check box to reverse the gradient.
3.2.4 change color[Change] The command allows you to adjust the color balance, contrast, and saturation intuitively. This command is equivalent to the color balance command and then the color/saturation command. However, it can adjust the image color more accurately and conveniently. When you use this command, you can adjust the entire image or only the content in the Selection Range and layer. Select [Image] | [adjust] | [change] command to open the [change] dialog box, as shown in the figure 3.27 On the left. The thumbnail of the image to be processed in various situations is displayed in the dialog box, allowing you to adjust and observe the changes of the image. The two thumbnails in the upper left corner of the change dialog box represent the original image and the selected image respectively. The left figure shows the real effect of the original image, and the right pane shows the adjusted image. This allows you to intuitively compare the pre-adjusted and post-adjusted images during the adjustment process. Move the mouse pointer to the original thumbnail and click it to restore the selected thumbnail to the same effect as the original image. There are 7 thumbnails in the lower left of the dialog box. The selected thumbnail in the middle works the same as the selected thumbnail in the upper left corner to display the adjusted image effect. The other six thumbnails can be used to change the RGB and CMY colors of the image respectively. clicking any one of the six thumbnails can increase the color corresponding to the thumbnail. For example, click the [dark green] thumbnail to add a green color. The three thumbnails in the lower-right corner of the dialog box are used to adjust the brightness of the image. Click the highlighted thumbnail to brighten the image. Click the dimmed thumbnail to darken the image, the adjusted effect is displayed in the selected thumbnail. In the upper-right corner of the dialog box, there are four single-choice buttons. In the above three dialog boxes, the "Shodows" dialog box appears, the "Midtones" dialog box appears, and the "Highlights" dialog box appears)] Single-choice buttons have the same meaning and adjust the dark, middle, and bright colors respectively. Saturation: the single-choice button is used to control the Saturation of the image. When this single-choice button is selected, Photoshop automatically refreshes the dialog box to adjust the saturation, as shown in the right figure 3.27. At this point, only three thumbnails are displayed at the bottom left of the dialog box. Click the low saturation and high saturation thumbnails to reduce and increase the saturation respectively. Under the "saturation" Single-choice button, there is a "Fine/rough (Fine/Coarse)" slide, which can be used to control the intensity of Color adjustment. The more the slide moves toward the "fine" side, the more subtle the changes will be when you click the thumbnail adjustment. The more you click the "rough" side, the more obvious the changes will be when you click the thumbnail adjustment. The Show Clipping check box on the right of the slide bar shows the ultra Color Gamut in the image, that is, the color overflow area, which can prevent overflow after adjustment. When this check box is not selected, Photoshop CS2 does not respond to the color overflow area. This check box is equivalent to the View | Color Gamut warning command. Figure 3.27 [change] dialog box
