This article describes the method of adjusting contrast of C# images. Share it for your reference. The details are as follows:
//Define the contrast adjustment functionprivate static Bitmap ContrastP(Bitmap a, double v)
{
bmpData = (new Rectangle(0, 0, , ), , .Format24bppRgb);
int bytes = * * 3;
IntPtr ptr = bmpData.Scan0;
int stride = ;
unsafe
{
byte* p = (byte*)ptr;
int temp;
for (int j = 0; j < ; j++)
{
for (int i = 0; i < * 3; i++)
{
temp = (int)((p[0] - 127) * v + 127);
temp = (temp > 255) ? 255 : temp < 0 ? 0 : temp;
p[0] = (byte)temp;
p++;
}
p += stride - * 3;
}
}
(bmpData);
return a;
}
I hope this article will be helpful to everyone's C# programming.