The purpose of this paper is to describe medical information retrieval in mobile device to access peer-reviewed information based on textual search and content based image retrieval (CBIR). CBIR consists of retrieving the most visually similar images to a given query image contained in a database of images. In medical diagnosis, the visual characteristics of an image carry diagnostic informatio...

Password authentication is a mechanism used to authenticate user identity over insecure communication channel. In this paper, a new method to improve the security of password authentication is proposed. It is based on the compression capability of the fractal image coding to provide an authorized user a secure access to registration and login process. In the proposed scheme, a hashed password s...

Assessing the computational efficiency of an image compression technique plays an important part in evaluations used to estimate the overall quality of the compression. In this chapter, different methods for assessing computational efficiency will be explored as a part of the evaluations used to determine still image compression usability in image storage/communication systems such as a Picture...

abstract niklas luhmann was one of the prominent thinkers in the realm of sociology and the philosophy of social sciences. his approach was a systems approach. he classified the realm of reality and its entities into four groups that consisted of: machines, organisms, psychic systems, social systems. he belonged to the second wave of systemic thought and focused on the complexity and emergence ...

This article is based on CMOS image sensor which is commonly used in image acquisition. It applies 32-bit ARM9 microprocessor S3C2410A as the CPU to control other function modules and designs embedded Arm9 image acquisition system for the realization of machine vision. The main function modules are SDRAM memory cell, image acquisition unit and Ethernet transmission module, UART serial port comm...

Within the communication process of human beings, the speaker’s facial expression and lip-shape movement contains extremely rich language information. The hearing impaired, aside from using residual listening to communicate with other people, can also use lip reading as a communication tool. As the hearing impaired learn the lip reading using a computer-assisted lip-reading system, they can fre...

Existing spread spectrum based watermarking techniques can not despread the encoded signal as expected in a typical spread spectrum communication system. Also the change in the statistics of the watermarked image as a result of attacks are not adequately compensated. It is therefore expected that these systems have not yielded the desired fully robust characteristics. This paper presents a spre...

This paper presents a new method for encryption of color images based on a combination of chaotic systems, which makes the image encryption more efficient and robust. The proposed algorithm generated three series of data, ranged between 0 and 255, using a chaotic Chen system. Another Chen system was then started with different initial values, which were converted to three series of numbers from...

Content based image retrieval is increasingly gaining popularity among image repository systems as images are a big source of digital communication and information sharing. Identification of image content is done through feature extraction which is the key operation for a successful content based image retrieval system. In this paper content based image retrieval system has been developed by ad...