# Nt1310 Unit 4 Lab Report

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Step 1: Select secret image S and target image T. If the size of the target image T is different from that of the secret image S, change the size of T to be identical to that of S
Step 2: Convert target image into HSV image by using the equation (1) to form new target image T
Step 3: For performing color conversion, first means and of S and T are find out and then find standard deviation quotient from equation (3.5) for each color channel
Step 4: Limit mean value by eight bits and standard deviation quotient to seven bits
Step 5: Based on this value, for each pixel p in each secret image S with color value c where c = r, g, or b, transform c into a new value by (3)
Step 6: if is not smaller than 255 or if it is not larger than 0, then …show more content…
Step 19: Concatenate the bit streams of all T in F in a raster-scan order to form a total bit stream ; use the secret key K to encrypt into another bit stream by using AES encryption; and embed into by replacing fourth bit position.
Step 20: Construct a bit stream I including: 1) encryption key; and 2) total length of before encryption and embed the bit stream I into mosaic image F by the same scheme used in Step 16.
Step 21: Send embedded target image to receiver side through e-mail.
ALGORITHM 2: Secret image recovery

Step 1: Select the image

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