Image retrieval is an important research field which has received great attention in the last decades. In this paper, we present an approach for the image retrieval based on the combination of text-based and content-based features. For text-based features, keywords and for content-based features, color and texture features have been used. Query in this system contains some keywords and an input...

In this paper we design a new practical computer algorithm based on chaotic map lattices which allows direct encryption and decryption of color digital images. The basic idea is to convert, pixel by pixel, the image color to logistic chaotic maps one-way coupled by initial conditions. After small numbers of iterations and cycles, the image becomes indistinguishable due to inherent properties of...

In this paper, a new image encryption scheme using a secret key of 144-bits is proposed. In the substitution process of the scheme, image is divided into blocks and subsequently into color components. Each color component is modified by performing bitwise operation which depends on secret key as well as a few most significant bits of its previous and next color component. Three rounds are taken...

Reconstruction the spectral data of color samples using conventional color devices such as a digital camera or scanner is always of interest. Nowadays, multispectral imaging has introduced a feasible method to estimate the spectral reflectance of the images utilizing more than three-channel imaging. The goal of this study is to spectrally characterize a color scanner using a set of conventional...

The image security on internet transfers is the concern of the hour as the breaching attacks into the image databases are rising every year. The hackers take advantage of the stolen personal and important images to fulfill their dangerous and unethical intentions. The image data theft can be used to defame a person on the internet by posting the illegal and unacceptable images of that person (i...

In recent years, one can see an increasing interest in the security of digital images. This research presents a new RGB color image encryption using keystream generator based on Choquet fuzzy integral (CFI). The properties of the dynamical keystream generator with mathematical analysis are presented in this work. In the proposed method, the CFI is first used to generate pseudo-random keystreams...

Today, with the continuous increase in use of computer networks and rapid evolution information technologies. The secure transmission data over Internet has become an urgent necessity to preserve privacy users protect sensitive from theft distortion. images are most this transferred data, so it was necessary by encrypting them using algorithms that ensure protection access receiver. Color conta...