There are many neutral tonal methods, and a more common method of channel substitution is presented here. Replace with the channel can be a two-color picture, and then use the color palette tool to quickly unify the colors, and then control the good and low saturation effect, high light and dark part of the rendering of some complementary.
Original
< small map view big picture >
Final effect
1, open the material picture, the background layer to copy a layer, into the channel panel, select the green channel, press CTRL + A all selected, press CTRL + C copy, select the blue channel, press CTRL + V paste, point RGB channel return to the layer board, the effect of the following figure.
< map 1>
2, create hue/saturation adjustment layer, adjust the cyan, parameter settings such as Figure 2, the effect is shown in Figure 3. This step turns the cyan in the picture into red.
< map 2>
< map 3>
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