A new system, RAIDER (Retrieval and Annotation of Image Databases), has been developed for the management of image databases. RAIDER was designed to combat the inadequacies and inefficiencies of traditional systems via a combination of content based retrieval and enhanced text based query capabilities. The interactive annotation technique employed in RAIDER is both quick and easy to use. As a w...

Methods have been used for identification of human by recognizing lip prints. Human lips have a number of elevation and depressions features called lip prints and examination of lip prints is referred to as cheiloscopy. Lip prints of each human being are unique in nature like many others features of human. In this paper lip print is first smoothened using a Gaussian Filter. Next Sobel Edge Dete...

Arminger and Sobel proposed an approach to estimate mean and covariance structures in the presence of missing data These authors claimed that their method based on Pseudo Maximum Likelihood PML estimation may be applied if the data are missing at random MAR in the sense of Little and Rubin Rotnitzky and Robins however stated that the PML approach may yield inconsistent estimates if the data are...

Sniffing has historically been considered an olfactory behavior because inhalation is a necessary step in odor perception. Growing evidence, however, has demonstrated that the display of sniffing surpasses the bounds of those contexts that are olfactory in nature. In this issue of Chemical Senses, Arzi, Shedlesky, Secundo, and Sobel demonstrate that humans mimic visually and auditory-observed s...

In this paper, we present methods for edge segmentation of satellite images; we used seven techniques for this category; Sobel operator technique, Prewitt technique, Kiresh technique, Laplacian technique, Canny technique, Roberts technique and Edge Maximization Technique (EMT) and they are compared with one another so as to choose the best technique for edge detection segment image. These techn...

Received Jul 5, 2012 Revised Aug 8, 2012 Accepted Aug 15, 2012 In this paper, a new one-stage nonlinear directional derivative scheme has been proposed for edge detection. The directional edge detection method was applied to gray and color images. The results were compared to three wellknown conventional edge detectors namely Canny, Prewitt, and Sobel. According to results, the directional deri...

Nowadays security and authentication are the foremost parts of our daily life. Iris is the one of the most reliable organ or part of the human body which can be used for identification and authentication purpose. This paper examines for edge detection techniques use for iris recognition system .Between the prewitt,sobel,LoG,Min.contructor of laplacian edge detector techniques the experimental r...

Image intensity shows abrupt changes at edges. So some typical edge detection operators are proposed by computing of local first or second derivative operate, such as Roberts, Prewitt, Sobel, LOG, Kirsh, etc. But several practices show that these typical operators are not ideal, and they can’t meet people’s demand for edge detection accuracy. Therefore, it is necessary to find some better metho...

| The performance of a neural network based edge detector for high-contrast images has been investigated both quantitatively and qualitatively. We have compared it's performance for both synthetic and natural images with those of four existing edge detection methods namely, Sobel's operator, Johnson proposed Contrast based Sobel operator, MarrHildreth's Laplacian-of-Gaussian (LoG) operator, and...

Face recognition has been a fast growing, challenging and fascinating area in real time applications. A large number of face recognition algorithms have been developed in last decades. This paper presents a face recognition approach that utilizes the Sobel operator, Local Ternary Pattern (LTP) descriptor, Gabor features and Principal Component Analysis (PCA) algorithms to attain enhanced recogn...