The rapid development of multimedia devices such as computers, network technologies, and cell phones have made it easier for users to create, broadcast, convey, share, store, and distribute multimedia data including images, videos and audio files on a daily basis. However, the availability of image processing software in the public domain has facilitated illegal copying and distribution of digi...

Image hashing is a novel technology of multimedia and finds many applications such as image retrieval, image copy detection, digital watermarking and image indexing. This paper proposes a multiple histograms based image hashing, which can reach an acceptable trade-off between rotation robustness and discrimination. The proposed hashing is done by converting the input image into a normalized ima...

Image perceptual hashing has been proposed to identify or authenticate image contents in a robust way against distortions caused by compression, noise, common signal processing and geometrical modifications, while still holding a good discriminability to tell the same content from different ones in sense of human perception. We propose and compare in this paper four normalized block mean value ...

Image hashing is a new technology in multimedia security. It maps visually identical images to the same or similar short strings called image hashes, and finds applications in image retrieval, image authentication, digital watermarking, image indexing, and image copy detection. This paper presents a perceptual hashing for color images. The input image in RGB color space is firstly converted int...

The perceptual image hashing is an emerging technique which can be used in image authentication and content-based image retrieval. Design of an image hashing scheme which has both robustness and fragility properties is becoming a new challenge. Recently, Xiang et al. proposed a histogram-based image hashing scheme which achieves a good robustness to perceptually insignificant attacks. However, ...

In order to improve classification performance and operating efficiency of the hash algorithm, this paper proposes a novel algorithm that combines three-dimensional global features local energy features. During stage extraction, image is firstly compressed by SVD decomposition form secondary image. Then statistical at visual angle are extracted as Finally, feature generated using relationship b...

With the advancement of technology, it has become easier to modify or tamper with digital data effortlessly. In recent times, image hashing algorithm gained popularity for authentication applications. this paper, a convolutional stacked denoising autoencoder (CSDAE) is utilized producing hash codes that are robust against different content preserving operations (CPOs). The CSDAE comprises mappi...

Image perceptual hashing finds applications in content indexing, large-scale image database management, certification and authentication and digital watermarking. We propose a Block-DCT and PCA based image perceptual hash in this article and explore the algorithm in the application of tamper detection. The main idea of the algorithm is to integrate color histogram and DCT coefficients of image ...