Csharp 如何从原始图像到新创建的图像获得相同的特定 colored颜色 ，并且具有相同的 colored颜色 量和相同的宽度和高度

您的代码中有几个问题:

1. 如果在分析源图像之后、调用SaveColorsAsBitmap之前查看"Colors"数组的内容，则会发现值太多且重复.我认为数组中的元素数量应该与原始图像中的 colored颜色 数量相匹配.首先，在将一种 colored颜色 添加到"Colors"数组之前，您需要判断该数组中是否已经存在这样的 colored颜色 .要做到这一点，您可以稍微更改"Colors"数组的 struct ，即创建一个将包含 colored颜色 值及其十六进制表示的类.在此之后，数组将包含原始图像中的 colored颜色 数量.
2. 在SaveColorsAsBitmap方法中，需要设置将用color-widthColorBlock和heightColorBlock填充的矩形的大小.此外，在图形中绘制时，必须遵循沿Y轴的步长，即后续的每种 colored颜色 都必须低于另一种 colored颜色 .

附注:不要忘记在代码中更改源和结果图像的路径

完整代码:

public class ColorItem
{
    public Color color { get; set; }
    public string hexColor { get; set; }
}

private List<ColorItem> GetColors()
{
    List<string> targetColors = new List<string>
    {
        "#ff00fe",
        "#d00078",
        "#e10a12",
        "#fb3f00",
        "#ff7d01",
        "#ffa800",
        "#ffcf00",
        "#fefd19",
        "#7cff21",
        "#12f218",
        "#01d31c",
        "#00b02c",
        "#008c4d",
        "#00a09b",
        "#00c3c9",
        "#0165ef"
    };

    List<ColorItem> colors = new List<ColorItem>();

    using (var bmp = new Bitmap(@"sourceImage.jpg"))
    {
        int width = bmp.Width;
        int height = bmp.Height;

        for (int j = 0; j < height; j++)
        {
            for (int i = 0; i < width; i++)
            {
                Color c = bmp.GetPixel(i, j);
                string hexColor = ColorTranslator.ToHtml(c).ToLower(); // Convert to lowercase

                // Check if the lowercase hex color matches any of the target colors
                if (targetColors.Contains(hexColor))
                {
                    if (colors.Count(d => d.hexColor == hexColor) == 0)
                    {
                        colors.Add(new ColorItem() { color = c, hexColor = hexColor });
                    }
                }
            }
        }

        // Save the bitmap with the colors once all colors are collected
        SaveColorsAsBitmap(colors, @"resultImage.png");
    }

    return colors;
}

private void SaveColorsAsBitmap(List<ColorItem> colors, string filePath)
{
    int widthColorBlock = 39; // color rectangle width
    int heightColorBlock = 18; // color rectangle height

    int imageHeight = 377; //result image height
    int imageWidth = 106;  //result image width

    var startDrawColorsPoint = new Point(45, 38); // start point (x,y) for drawing colors

    var hexBackground = "#CECECE"; 
    var backgroundColor = System.Drawing.ColorTranslator.FromHtml(hexBackground); // result image background color and hex color value

    var borderThickness = 1;  // thickness of lines around color (pixel)

    using (Bitmap bitmap = new Bitmap(imageWidth, imageHeight, PixelFormat.Format32bppArgb))
    {
        using (Graphics g = Graphics.FromImage(bitmap))
        {
            g.Clear(backgroundColor);

            for (int i = 0; i < colors.Count; i++)
            {
                using (SolidBrush brush = new SolidBrush(colors[i].color))
                {
                    //draw black border
                    g.FillRectangle(Brushes.Black, startDrawColorsPoint.X, (heightColorBlock * i) + startDrawColorsPoint.Y, widthColorBlock, heightColorBlock + borderThickness);

                    //draw color block
                    var colorBlockPositionX = startDrawColorsPoint.X + borderThickness;
                    var colorBlockPositionY = startDrawColorsPoint.Y + (heightColorBlock * i) + borderThickness;
                    var colorBlockWidth = widthColorBlock - (borderThickness * 2);
                    var colorBlockHeight = heightColorBlock - borderThickness;

                    g.FillRectangle(brush, colorBlockPositionX, colorBlockPositionY, colorBlockWidth, colorBlockHeight);
                }
            }
        }

        // Save the bitmap as a PNG file (PNG supports transparency)
        bitmap.Save(filePath, ImageFormat.Png);
    }
}