图像8位数据读取使用.NET

最新推荐文章于 2022-12-30 08:11:00 发布

松子茶

最新推荐文章于 2022-12-30 08:11:00 发布

阅读量1.5k

点赞数

CC 4.0 BY-SA版权

文章标签：图像处理图像数据

本文链接：https://blog.youkuaiyun.com/songzitea/article/details/8332526

机器学习与视觉专栏收录该内容

162 篇文章 ¥9.90 ¥99.00

订阅专栏

本文介绍了如何通过直接访问.NET Framework中的BitmapData内存来处理8位灰度或索引图像，这种方法比Set/GetPixel方法更快。首先通过Bitmap.LockBits()锁定内存，然后在完成操作后使用Bitmap.UnlockBits()解锁。创建了自定义的SetPixel和GetPixel方法，适用于8位像素，同时注意直接内存访问的安全问题。对于8位图像，每个值对应颜色调色板的索引，可以通过设置调色板实现灰度图像。最后提供了一个8位图像访问类，方便使用。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

For some reason Microsoft made it pretty hard to work with anything but 24bit images. This is even though they provide you with several pixel formats, but no way of setting and getting the values of a pixel. If you use the SetPixel(x,y) or GetPixel(x,y) methods, your application will fail. There are plenty of articles and blogs on the Internet on how to do direct access on 1bit and 24bit, but I wasn't able to find anything on8bit.

This article will cover some of the basics on how to access 8 bit greyscale or indexed images, by accessing the bitmapdata directly in memory. This also has the benefit of being much faster than the Set/GetPixel

了解本专栏