gunjannandy / steganography Goto Github PK

I tried to encode the message in all the R,G and B channels. But the watermarked image was all grey colored. Any inputs on how to output with proper colored watermark image?

Hi,

Thank you for this great library and work.

I am waiting for the DWT comparison ! 😃

Thanks,

In your report, you said that the secret message is embedded by modifying the coefficients of the middle-frequency sub-band due to given reasons.
But in the code DCT Class -> encode_image function, you embedded each bit of each character of the secret into the LSB of the first element of each block. Why is that?

.
.

for quantizedBlock in quantizedDCT:
            #find LSB in DC coeff and replace with message bit
            DC = quantizedBlock[0][0]
            DC = np.uint8(DC)
            DC = np.unpackbits(DC)
            DC[7] = self.bitMess[messIndex][letterIndex]
            DC = np.packbits(DC)
            DC = np.float32(DC)
            DC= DC-255

.
.
Also, why are you subtracting the value with 255 and making it negative as the maximum value of DC will be 255?

please add requirements.txt to easily install dependencies