1. Take the following figure as an example. To change the background of the image below, click to enter the Channel panel.
Second, click on the three-color channels one by one to observe which channel to use when the color difference between the characters and the background is large.
Third, after finding the channel with large chromatic aberration, copy this channel by one layer.
Fourth, the following operations are all operated on the copied channel (note: never operate on the original channel).
5. Press Ctrl+L to open the color code window, drag the three sliders together, and make the characters and background become pure black/white (individual positions cannot be adjusted to black, so there is no need to force them, just use a brush to smear them later), and click OK.
6. As shown in the figure below, if an individual area is similar to the background color, and it is impossible to adjust the black color by using the color scale, then press the B key to switch the brush tool, press the D key to restore the front/background color to the black and white primary color, and then smear this area with black.
Seven, after daubing, hold down the Ctrl key, click on the channel thumbnail, and select all the white areas (background areas) of the channel.
Eight, and then click on the RGB channel, copy channel can be hidden, can also be deleted directly.
Nine, back to the layer panel, Shift+Ctrl+I can select people by deselecting the selection.
Ten, press Ctrl+J to dig out the characters directly.
XI。 Select the background color to replace in the color swatch.
Twelve, click on the bottom of the original background layer, press Alt+DEl to fill the selected foreground color and complete the background replacement operation.
Thirteen. Finally, press Ctrl+Alt+S to save the window, select the format, save the file location, change the file name, and click Save.