Public Function ConvertToGrayscale(ByVal source As Bitmap) as Bitmap Dim bm as new Bitmap(source.Width,source.Height) Dim x Dim y For y=0 To bm.Height For x=0 To bm.Width Dim c as Color = source.GetPixel(x,y) Dim luma as Integer = CInt(c.R*0.3 + c.G*0.59 + c.B*0.11) bm.SetPixel(x,y,Color.FromArgb(luma,luma,luma) Next Next Return bmEnd Function
解决方案 »
免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货