aforge.net中的过滤器不支持源像素格式

问题描述

我正在尝试使用Aforge.net开发一个LPR系统，我想在我的图像上应用一个滤镜，就像在这里看到的那样:

I am trying to develop an LPR system using Aforge.net ,i want to apply a filter on my image as you can see here :

            Bitmap a = new Bitmap(@"C:\Users\Public\Pictures\Sample Pictures\1.png");
            SobelEdgeDetector filter = new SobelEdgeDetector();
            filter.ApplyInPlace(a);
            pictureBox1.Image = a;

但运行后出现此错误:

Source pixel format is not supported by the filter.

我在aforge.net上是个新手.

I am so new in aforge.net.

推荐答案

从此 API文档页面，SobolEdgeDetector过滤器仅支持8bpp灰度图像.

As you can see from this API documentation page, the SobolEdgeDetector filter only supports 8bpp grayscale images.

要应用滤镜，因此需要先将图像转换为8bpp并转换为灰度，例如:

To apply the filter, you therefore need to convert your image to 8bpp and grayscale first, for example like this:

Bitmap a = AForge.Imaging.Image.Clone(
    new Bitmap(@"C:\Users\Public\Pictures\Sample Pictures\1.png"),
    PixelFormat.Format8bppIndexed);
AForge.Imaging.Image.SetGrayscalePalette(a);

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