A Fast DCT Algorithm for Watermarking in Digital Signal Processor

<div>The distribution of coefficients in DCT, (a) low frequency position (heavy color), (b) low-middle-frequency position (light color), (c) high-middle frequency position (light color with dots), and (d) high frequency position (white).</div>

Mathematical Problems in Engineering

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Figure 2

Figure 2: A Fast DCT Algorithm for Watermarking in Digital Signal Processor 