Adjust the contrast: First, set a threshold, usually 128 then determine the pixel R, G, B values, all greater than 128, add a value smaller than 128, reduce the value

对比度\Project1.cfg
......\Project1.dof
......\Project1.dpr
......\Project1.res
......\Project1.~dpr
......\Unit1.dcu
......\Unit1.ddp
......\Unit1.dfm
......\Unit1.pas
......\Unit1.~ddp
......\Unit1.~dfm
......\Unit1.~pas
对比度

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