Desaturate it and set the blend mode to Screen and opacity to 70%. Then use the levels to darken it a little bit.

将该层去色，混合模式设为滤色，不透明度70%。然后用色阶将它调暗一点。

youdao

I spent very little time actually cutting them out. Since the trees are typically darker than the ground, I just set the layer blend mode to "darken".

实际上我只花了一点时间来抠树，因为一般情况下，树木比地面的颜色深一些，我只需要将图层混合模式设置为“变暗”即可。

youdao