Take a 256 × 256 grayscaled image. Hide a (text) message of length 15 to 25 in the image such that the first bit of the hidden message is positioned at the pixel ([p/8], [q/8]). P=839 9=283
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- When embedding a 10-bit message in an image using LSB replacement, write down the probability that the embedding will introduce k ∈ {0,1,...,10} embedding changes.Given a 1000 × 1000 picture in true color (24-bit depth), how many bytes will be needed to store this image if we use a color look-up table and assume the image has only 256 different colors?What is dynamic range and find the number of bits in an image with intensity 1024
- Describe an algorithm for converting a greyscale image to a two-bit image (i.e. only using black, dark grey, light grey and white), while preserving as much visual quality as possible. Your algorithm should map every input greyscale pixel to exactly one output pixel.Consider the following MIPS code segment in the attached image, and how many iterations does this loop undergo?Consider a checkerboard image containing binary pixel values in which each square is 1 mm x 1 mm. Assuming that the image extends infinitely in both coordinate directions, what is the minimum sampling rate (in samples/mm) required to avoid aliasing? Explain your calculations in detail.
- If we use 2-bytes pixel values in a 32-bit lookup table representation, how manybytes does the lookup table occupy? how many bytes does the image occupy?Suppose that an imaging system samples a checkerboard image at 8 samples (pixels) / mm of the checkerboard. What should be the minimum size (side-length (mm) x side-length (mm)) of a square of the checkerboard, which will not cause aliasing in the image?Given the bitplanes of a 3x3 pixels image, which one is the reconstructed image?
- CHOOSE THE CORRECT OPTION If each pixel of an acquired image is represented by 11 bits, the number of distinct gray intensities that are available in the image is given as A. 2048 B. 2047 C. 1023 D. 1024Encode the following 8-bit 6*6 image using Huffman coding .the histogram of the image mentioned below.You are given a text file of size 60 MB, which is to be encrypted using steganography in the low-order bits of each color in an image file. What size image would be required in order to encrypt the entire file? What size would be needed if the file were first compressed to a third of its original size? Give your answer in pixels, and show your calculations. Assume that the images have an aspect ratio of 3:2, for example, 3000 × 2000 pixels.