使用Jpeg的隐写术 [英] Steganography using Jpeg

问题描述

大家好，

我正在一个需要在C#应用程序上打开jpeg文件的项目中工作

然后获取DCT系数..用我的隐藏消息替换一些位

然后在更改一些系数后将图像重新编码为jpeg图像.

问题是..我不知道如何从jpeg图像中获取这些系数..

&到达它们并对其进行更改之后..我如何将其保存到新的jpeg图像中? :))


在此先感谢

Hi all ,

i''m working in a project that needs to open a jpeg file on a c# application

then get the DCT coefficients .. replace some bits with my hidden message

then reencode the image into a jpeg image .. after changing some coefficients

the problem is .. i don''t know how to get those coefficients from a jpeg image ..

& after reaching them& changing it .. how will i be able to save it into a new jpeg image ? :))


thanks in advance

推荐答案

如果您需要示例代码来进行基于DCT的隐写术，请访问:使用JPEG的高性能隐写术DCT域中的量化索引调制 [ ^ ].该示例以及论文的背景信息应被证明是有用的.

干杯！

--MRB

If you need a sample code for doing DCT based steganography please go here: http://code.google.com/p/c-jpeg-steganography/[^]. This paper is an interesting read on the same topic: High performance JPEG steganography using quantization index modulation in DCT domain[^]. The sample along with the background information of the paper should prove to be useful.

Cheers!

--MRB

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