Color Enhancement in Art Works Based on Image Processing Technology of Contourlet Domain

Abstract

With the rapid development of network technology and image processing technology, people can obtain data in a number of ways. Although the emergence of digital works has brought convenience to people’s lives, it has also brought many hidden dangers in the field of copyrights, for example, illegal copying, dissemination, and disclosure of digital art works. Sensitive information contained in digital art works can easily be stolen or illegally tampered with through the Internet, thereby destroying the legitimate rights and interests of copyright owners. Therefore, the emergence of digital watermarks provides convenience and practicality for copyright protection. This paper proposes an image digital watermarking algorithm based on SVD and contourlet domain changes. Contourlet transforms the carrier image, divides the direction subbands with high energy values into blocks, performs SVD on each sub-block, and adds the watermark according to the parity quantization rule. The color information-based image enhancement discussed in this article uses the characteristics of multichannel color images to meet application requirements. It mainly involves three aspects: color image enhancement technology that dyes grayscale images into color images, image enhancement technology that uses the colorization algorithm to improve the accuracy of the reconstructed chromaticity image in the process of super-resolution reconstruction, and grayscale image color enhancement technology that preserves the characteristics of the color image during the conversion of the artwork image to the grayscale image. This paper studies the image processing technology based on the contourlet domain and applies it to the research of color enhancement of art works to promote the further development of art works.