WPF 调节图片的明度(亮度)

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转载最新推荐文章于 2024-04-25 11:57:58 发布 · 527 阅读

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原文链接：http://www.cnblogs.com/dreamzgj/archive/2012/06/20/2556559.html

本文介绍了一种使用C#编程语言调整图片亮度的方法，通过修改像素数据实现图片亮度变化，适用于需要进行图像处理的开发人员。

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void SetBrightness(int brightness)
{
brightness = brightness * 255 / 100;

            WriteableBitmap wb = new WriteableBitmap(this.ImgViewBak.Source as BitmapSource);
            uint[] PixelData = new uint[wb.PixelWidth * wb.PixelHeight];
            wb.CopyPixels(PixelData, 4 * wb.PixelWidth, 0);
            for (uint y = 0; y < wb.PixelHeight; y++)
            {
                for (uint x = 0; x < wb.PixelWidth; x++)
                {
                    uint pixel = PixelData[y * wb.PixelWidth + x];
                    byte[] dd = BitConverter.GetBytes(pixel);
                    int B = (int)dd[0] + brightness;
                    int G = (int)dd[1] + brightness;
                    int R = (int)dd[2] + brightness;
                    if (B < 0) B = 0;
                    if (B > 255) B = 255;
                    if (G < 0) G = 0;
                    if (G > 255) G = 255;
                    if (R < 0) R = 0;
                    if (R > 255) R = 255;
                    dd[0] = (byte)B;
                    dd[1] = (byte)G;
                    dd[2] = (byte)R;
                    PixelData[y * wb.PixelWidth + x] = BitConverter.ToUInt32(dd, 0);
                }
            }
            wb.WritePixels(new Int32Rect(0, 0, wb.PixelWidth, wb.PixelHeight), PixelData, 4 * wb.PixelWidth, 0);
            this.ImgView.Source = wb;
        }

转载于:https://www.cnblogs.com/dreamzgj/archive/2012/06/20/2556559.html