Watermarking Algorithm Research For Color Images And Vedios Based On HSV Color Space

Based on HSV (hue, saturation, and value) color space, a watermarking algorithm for color images is proposed.The digital watermark using the color image is embedded in the original color image. According to the characters of HSV color space, using a different color space, a RGB image is processed by first converting it to an HSV image. And then transform the watermarking images of H plane, S plane and V plane using DCT by 8*8 blocks. Keep DCT coefficients in the top left corner of every block and replace other coefficients with zeros in order to reform new matrix with fewer effective coefficients. Then convert the original color image to an HSV image. Embed watermarking image in intermediate and low frequency of coefficients DCT after transforming the H, S and V planes using DCT by 8*8 blocks. Then a new watermarked image forms through the inverse DCT transform. At last, convert it back to RGB color space. Watermarking image is less than the original images, the robustness is enhanced using redundant embedding technique.Based on the watermarking algorithm of color images, it presents the...