When we are dealing with pictures, we often encounter more complex and changeable edges. For example below this tree, how should pull the picture to be most worry? Obviously, you can no longer use the Lasso tool to pull along the edge unless you want to lose all your hair ...
Here, we want to use the method is: Channel pull. Let's look at the operation together:
1, copy the original image.
2, select the upper-middle-level picture, adjust the "level" inside the "Output levels" option: Red--0 0 Green--0 0 Blue--0 255.
3, add the "color fill" effect, set as follows:
4, adjust the color level again, this time need to use "Choose Shadow Color" and "Choose highlight Color" two small straws adjust black and white field, the straw on the left absorbs the color "black Field" (both: use it to select the point of color and darker than his color into the darkest (black)), the same, the right side of the suction works to set the "white field":
5, Black and white field adjustment after the figure:
6, add "reverse" effect:
7, if not satisfied, continue to adjust the color levels.
8, "modification--the plane of the selected"
9, select two map, alignment, select "Modify--mask--combined for the Mask", at this time can see the trees perfectly dug out.
Source file: