LSB embedding with the text I'll try to use the indicator

Question

Abduellah Elbakoush 2022-1-3

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1621605-lsb-embedding-with-the-text-i-ll-try-to-use-the-indicator

回答： Image Analyst 2022-1-3

I am working in an image steganography using LSB technique , I'll try to use indicator to improve security Can anyone Help me to explain How I can do this

The technique uses least two significant bits of one of the channels Red, Green or Blue as an indicator of data existence in the other two channels. The indicator bits are set randomly (based on the image nature) in the channel. below the text shows the relation between the indicator and the hidden data inside the other channels.the indicator channel is not fixed. The indicators are chosen based on a sequence. In the first pixel Red is the indicator, while Green is channel 1 and Blue is the channel 2. In the second pixel, Green is the indicator, while Red is channel 1 and Blue is channel 2. In third pixel Blue is the indicator, while Red is channel 1 and Green is channel 2

the Indicator is

Indicator Ch 1 Ch 2

00 No hidden data No hidden data

01 No hidden data 2bits of hidden data

10 2bits of hidden data No hidden data

11 2bits of hidden data 2bits of hidden data