Aiming at the shortcomings of current Canny edge detection method in terms noise removal, threshold setting, and recognition, this paper proposes a for improving by geo-information mapping. The traditional are analyzed using optimal criterion Tobler's First Law, which points out direction optimization difference between properties properties. property characteristics spatial distribution rules ...

In this system we improved the performance of an automatic system for extracting leaf contour. The proposed leaf contour extraction method consists of three major procedures: the detection of four edge points, and contour tracing. Leaf detection includes two stages: feature extraction and matching. For the leaf contour extraction part, we present a new technique for automatically identifying th...

Edge detection is one of the most commonly used operations in image analysis and is also an essential pre-processing step in image segmentation. An edge is the boundary between an object and the background, and indicates the boundary between adjacent parts of image and overlapping objects. Here we are reviewing several techniques for edge detection like Sobel operator technique, Prewitt techniq...

This paper evaluates the performance of the color based edge detection techniques. As known in prior the color images provides more information than the gray scale images, 90% of the edges are same in both type of images but 10% edges cannot be detected in gray images. Therefore color edge detection may improve the edge clarity further and also avoids false edges. The overall purpose of this pa...

Proposed watermarking algorithm is best suitable for the protection of multimedia content by using the concept of Digital Watermark. Proposed watermarking algorithm is developed by using a combination of Discrete Cosine Transform (DCT), Singular Value Decomposition (SVD) frequency domains and Canny Edge detection technique. The proposed algorithm is a Non-blind watermarking algorithm. By using ...

Document image binarization is a vital pre-processing technique for document image analysis that segments text from badly degraded document images. In this paper, we propose a robust document image binarization technique that is based on the concept of adaptive image contrast. The adaptive image contrast which is formed by combining local image contrast and the local image gradient makes it tol...

This paper presents a novel method for edge detection within two-dimensional signals (images). Using Boolean partial derivatives calculated quickly through a logical transform, the algorithm generates a binary edge map. The process is initially described for binary data and then extended for multi-bit (grayscale) images. Computer simulations demonstrate the procedure for three classes of signal...

In this work, we introduce a new algorithm for effectual crack detection using flying line laser thermography, based on the well-known Canny approach. The transforms input thermographic sequence into an edge map. Experimental measurements are performed metallic component that contains surface breaking cracks due to industrial use. specimen is tested thermography at different scanning speeds and...