A novel quality assessment for visual secret sharing schemes

Abstract

To evaluate the visual quality in visual secret sharing schemes, most of the existing metrics fail to generate fair and uniform quality scores for tested reconstructed images. We propose a new approach to measure the visual quality of the reconstructed image for visual secret sharing schemes. We developed an object detection method in the context of secret sharing, detecting outstanding local features and global object contour. The quality metric is constructed based on the object detection-weight map. The effectiveness of the proposed quality metric is demonstrated by a series of experiments. The experimental results show that our quality metric based on secret object detection outperforms existing metrics. Furthermore, it is straightforward to implement and can be applied to various applications such as performing the security test of the visual secret sharing process.

Design of Boolean XOR based (n, n) Secret Image Sharing Schemes with Contrast and Security Improvement

“…The proposed techniques have advantages like no pixel expansion, no need to design codebook and no Basis matrices required during share images generation. The quality evaluation metrics [14,15] such as correlation, Peak Signal-to-Noise Ratio (PSNR) and Mean Structural SIMilarity index (MSSIM) are used for verification of experimental simulation results in proposed schemes. The rest of the paper is organized as follows.…”