在 C# 中调整单色图像的大小

发布于 2024-08-28 21:31:06 字数 776 浏览 7 评论 0原文

我有以下代码可以使用以下代码调整单色图像的大小（因此像素值为 0[黑色] 或 255[白色]）

        Bitmap ResizedCharImage = new Bitmap(newwidth, newheight);

        using (Graphics g = Graphics.FromImage((Image)ResizedCharImage))
        {
            g.CompositingQuality = CompositingQuality.HighQuality;
            g.InterpolationMode = InterpolationMode.HighQualityBilinear;
            g.SmoothingMode = SmoothingMode.HighQuality;
            g.PixelOffsetMode = PixelOffsetMode.HighQuality;
            g.DrawImage(CharBitmap, new Rectangle(0, 0, newwidth, newheight),
                new Rectangle(0, 0, CharBitmap.Width, CharBitmap.Height), GraphicsUnit.Pixel);
        }

我遇到的问题是在调整大小（我放大图像）后某些像素值变成 254、253、1、2 等。（因此不是单色的。）我需要这种情况不会发生。这可能吗，也许可以通过更改 Graphins 属性之一来实现？

原文

I have the following code to resize a monochromatic image (hence pixel value is 0[black] or 255[white]) with the following code

        Bitmap ResizedCharImage = new Bitmap(newwidth, newheight);

        using (Graphics g = Graphics.FromImage((Image)ResizedCharImage))
        {
            g.CompositingQuality = CompositingQuality.HighQuality;
            g.InterpolationMode = InterpolationMode.HighQualityBilinear;
            g.SmoothingMode = SmoothingMode.HighQuality;
            g.PixelOffsetMode = PixelOffsetMode.HighQuality;
            g.DrawImage(CharBitmap, new Rectangle(0, 0, newwidth, newheight),
                new Rectangle(0, 0, CharBitmap.Width, CharBitmap.Height), GraphicsUnit.Pixel);
        }

The problem that I am having is that after resizing (i am enlarging the image) some of the pixel values become 254, 253, 1, 2 etc. (and so are not monochromatic.) I need that this do not occur. Is this possible, maybe by changing one of the Graphins properties?

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