使用C读取图像文件的程序 [英] program for reading a image file using C

问题描述

亲爱的所有人，

我需要C程序将其转换为JPG格式的图像，并且已经将其转换为未压缩的图像，请帮我改成相同的图像.

Dear All,

I need C program to a JPG formated image, and i have convert it to uncompressed image, please help me to the same.

推荐答案

我已经读过创建jpeg编码器/解码器大约需要花费1个人年的时间.

必须使用C还是可以使用C ++?

GdiPlus(C ++)允许您在项目中添加/添加少量代码即可打开/保存文件.自XP以来，这是Windows的一部分. (gdiplus.h gdiplus.lib)

步骤:

• 创建gdiPlus :: Bitmap，将其加载到图像文件中
• 从此位图创建HBITMAP
• 在此HBITMAP上获取GetDibBits
• 清洁结果，从每条扫描线的末尾删除填充字节(如果存在).

I''ve read that there is about 1 man-year''s worth of work to create a jpeg encoder/decoder.

Must you use C, or can you use C++?

GdiPlus(C++) will allow you to open/save files with a small addition of code to your project. This is a included part of Windows since XP. (gdiplus.h gdiplus.lib)

Steps:

• Create gdiPlus::Bitmap, load it with your image file
• Create a HBITMAP from this bitmap
• GetDibBits on this HBITMAP
• Clean-up result, removing padding bytes (if present) from end of each scan-line.

CodeProject上有一个出色的库，可让您读取JPEG文件并将其转换成几乎所有内容.此链接

CxImage

会带你到那里.不过，它是一个C ++库.如果您需要纯C代码，则可以尝试提取基本部分并将其反向转换为C.

希望有帮助.

There is an excellent library here on CodeProject that lets you read JPEG files and convert it into almost anything. This link

CxImage

will get you there. It is a C++ library, though. If you need pure C code, you could try to extract the essential parts and back-convert them to C.

Hope that helps.

这篇关于使用C读取图像文件的程序的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！