压缩后丢失嵌入式消息的解决方案
大家好，我希望您做得很好，我在周日有最后的项目演讲，并且真的很挣扎，该项目是关于我们使用JSTEG算法的隐身志，老师要求我们使用JPEG压缩，并在此后插入秘密消息量化矩阵，以下步骤为：
- dct，量化，插入秘密消息，量化倒数，idct - ＆gt;获取Stego图像 为了提取数据，AM在Stego图像上应用第二压缩：
- DCT，量化，提取秘密消息 问题是提取的消息是错误的，当我进行研究时，我发现jpeg是一种有损的压缩，这意味着使用第二压缩，我们将失去隐藏的消息 已经超过一个月来试图弄清楚它，但仍然没有找到任何解决方案 您有任何建议吗？ 谢谢
Hello Guys i hope that you are doing great , i have my final project presentation on sunday and am really struggling , The project is about the steganography we are using jsteg algorithm the teacher asked us to use JPEG compression and to insert the secret message after the quantification matrix , the steps that am following are :
- DCT , Quantization , inserting the secret message , Inverse of the quantization , IDCT --> getting the stego image
and in order to extract data am applying on the stego image a 2nd compression: - DCT , quantization , extracting the secret message
The problem is the message extracted is wrong , when i did researches i've found that JPEG is a lossy compression which means using the 2nd compression we will lose the hidded message
It's been more than a month trying to figure it out , but still didn't find any solution
Do you have any suggestions in mind ?
Thank you
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