コード例 #1
0
        void DrawHistogram(PictureBox window, CVHistogram histo, int channelIdx)
        {
            int imageWidth = window.Width;
            int imageHeight = window.Height;

            int bins = histo.BinSizes[0];
            int binWidth = imageWidth / bins;
            if (binWidth <= 0) binWidth = 1;

            CVPair minMax = histo.MinMaxValue;
            CVImage outputImage = new CVImage(imageWidth, imageHeight, CVDepth.Depth8U, 3);
            outputImage.Zero();

            for (int bin = 0; bin < bins; bin++)
            {
                double binValue = histo[bin];
                byte level = (byte)CVUtils.Round(binValue * 255 / minMax.Second);
                byte binHeight = (byte)CVUtils.Round(binValue * imageHeight / minMax.Second);

                byte[] color = new byte[3];
                color[channelIdx] = (byte)(((double)bin / (double)bins) * 255);

                byte[] markerColor = new byte[3];
                markerColor[channelIdx] = level;

                Color colColor = Color.FromArgb(color[2], color[1], color[0]);
                Color colMarker = Color.FromArgb(markerColor[2], markerColor[1], markerColor[0]);

                outputImage.DrawRectangle(new Rectangle(bin * binWidth, imageHeight - binHeight, binWidth - 1, binHeight), Color.White /* colColor */);
                outputImage.DrawRectangle(new Rectangle(bin * binWidth, imageHeight - binHeight, binWidth - 1, 1), colMarker);
                outputImage.DrawRectangle(new Rectangle(bin * binWidth, imageHeight - binHeight, 1, binHeight), colMarker);
            }

            window.Image = outputImage.ToBitmap();
            outputImage.Release();
        }