图像中的像素编辑 [英] pixel editing in an image

问题描述

我正在寻找VB的getpixel/setpixel函数的C ++版本.我在VB中有一个程序，它的运行速度太慢了，所以我试图将其转换为VC ++.基本上，它运行的算法会逐像素编辑图像.它在VB中工作正常，但像泥浆一样慢.

因此，a)如何在Vc ++中访问已加载图像中选定像素的rbg值，b)一旦获得信息，如何更改它们?

在此先感谢您.

I''m looking for the C++ version of the getpixel/setpixel functions of VB. I have a program in VB that''s way too slow, so I''m trying to translate it into VC++. Basically it runs algorithms that edit an image pixel by pixel. It works fine in VB, but slow as mud.

So a) how do you access the rbg values of a selected pixel in a loaded image in Vc++, and b) how do you change them once you have the info?

Thanks in advance.

推荐答案

您要访问多少像素? 5 15 :-)

如果要处理整个图片或其中的很大一部分，请忘记GetPixel/SetPixel-这太慢了.
若要获得更好的方法，请查看此CodeProject文章:一种在不使用慢GetPixel的情况下处理Windows位图像素数据的快速方法和SetPixel方法 [ ^ ].

另请参阅另一篇文章-教程:位图基础知识-GDI教程 [

How many pixels you want to access? 5, 15? :-)

If you want to process a whole picture or a big part of them, forget GetPixel/SetPixel — this is too slow.
For a better approach, check out this CodeProject article: A fast way to work on Windows bitmap pixel data without using the slow GetPixel and SetPixel methods[^].

See also another article — a tutorial: Bitmap Basics - A GDI tutorial[^].

—SA

您可以查看反谷物几何项目 [^ ]

很好:)

最好的问候
Espen Harlinn

You could take a look at the Anti-Grain Geometry Project[^]

It''s quite good :)

Best regards
Espen Harlinn

看看位图函数 [ ^ ]，特别是SetPixel

have a look at The Bitmap Functions[^], specifically SetPixel

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