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In this paper, a specific region called affine noisy invariant region is extracted from a query and database images to help accurate retrieval on different attacks. Then, only a 64×1 codebook based feature vector is obtained from this specific region applying vector quantization and codebook generation based on the Linde-Buzo-Gray algorithm, which reduces retrieval feature comparison calculations...
Texture classification is an important part of many object recognition algorithms. In this paper, a new approach to texture classification is proposed. Recently, local binary pattern (LBP) has been widely used in texture classification. In conventional LBP, directional statistical features and color information are not considered. To extract color information of textures, we have used color LBP. Also,...
In this paper, a semantic segmentation method for aerial images is presented. Semantic segmentation allows the task of segmentation and classification to be performed simultaneously in a single efficient step. This algorithm relies on descriptors of color and texture. In the training phase, we first manually extract homogenous areas and label each area semantically. Then color and texture descriptors...
Nowadays the steganographic methods use the more sophisticated image models to increase security; consequently, steganalysis algorithm should build the more accurate models of images to detect them. So, the number of extracted feature is increasing. Most modern steganalysis algorithms train a supervised classifier on the feature vectors. The most popular and accurate one is SVM, but the high training...
In this study a fully automatic segmentation of intervertebral disk method based on graph cut (GC) algorithm is presented. In graph cut algorithm, a graph is constructed from image pixels and two additional nodes named source (s) and sink (t). GC algorithm requires some seed points for initialization. Presented method extracts several features from training images and uses them to automate GC algorithm...
The extreme growth of using digital media has created a need for techniques that can be used to protect the copyrights of digital contents. One approach for copyright protection is to embed an invisible signal, known as a digital watermark, in the image. One of the most important features of an effective watermarking scheme is transparency. A good watermarking method should be invisible such that...
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