No business series 7: removing spots from old photos

The main steps are as follows

1. First, get the spot area in a certain way . Generally speaking , Spots due to small areas , Therefore, it will disappear after pooling . Here we call the minimum blur / The biggest blur , Get the picture of removing spots , Then subtract from the original drawing , You get the spot area .

2. Convert the speckled area into a mask , Covering the Gaussian blur of the original image . So the speckled area will be exposed , And the displayed color is the color obtained by Gaussian blur .

3. Put the original image on the lower layer of the upper two , The general drawing of the filled spot area can be obtained .

The specific steps are as follows ：① Copy the original Original To a new layer ;② Perform minimum blur on the new layer 、 The biggest blur （ Same radius ）, Then change the mode from normal to difference , Then adjust the histogram , obtain Mask;③ Copy the original Original To a new layer , Perform Gaussian blur until no spots are visible , Write it down as Blurred;④ take Mask Convert to mask , And placed in Blurred On the right ;⑤ Copy the original Original To Blurred below . So we get the final graph .