Rejuvenation - reverse opacity

material

<Figure 1>
<Figure 2>
final effect

When I came up with this idea two days ago, I mentioned it to someone, but I was dismissed as wishful thinking and almost gave up!
As shown in the picture below, what we have to do is to remove the translucent layer (a large and complex watermark) on top and restore the original appearance of the base image. (Note: The operation of the following layer is actually the operation of RGB values)

This is like walking from one place to another and needing to return. The safest and most reliable way is to walk back along the original road. Let’s see how we got here first! Opacity mixing principle: The overlay layer is mixed with the base image with an opacity of X%, and the resulting mixed image is equal to the overlay layer multiplied by X% plus the base image multiplied by (1-X%).

How to go back is self-explanatory: the base image is equal to the mixed image minus the overlay multiplied by x% and then divided by (1-X%), but we can only find the original image of the overlay, and we don’t know what opacity it is What about mixed ones? It doesn't matter, we will find out the opacity later.

1. Open the top materials <Picture 1> and <Picture 2>, select all of <Picture 1> and copy them, create a new layer on top of <Picture 2> and press Ctrl + V to copy <Picture 1>, as shown below. Display, the two layers are named: "Layer 0", "Layer 1". Set the blending mode of the upper layer (Layer 0) to Difference.

2. Call up the selection of <Layer 1> (that is, the selection of the frame), then click the position shown in the picture and select "Hue/Saturation"

3. It’s so scary, please do something less! By the way, the effect of opacity has not been added yet, so layer 1 needs to be multiplied by X%. There are at least two ways to do it, the output level of the color level or the lightness in the hue and saturation (if you are familiar with color theory and these two adjustment tools, you should know why), slow down the slider on the right side of the output level Move slowly to the left, the watermark gradually fades until it disappears, stop! It's 166 here. Now I know it. It turns out that the opacity x% is 166/255 or 65%!

4. Return to "Layer 0" and bring up the selection of "Layer 1", as shown in the figure below

5. As shown in the picture below, select "Color Levels"

6. Use the stamp to erase the border to get the final effect