Comparison of Some Efficient Methods of Contour Compression
نویسندگان
چکیده
Effectiveness of the Tangent Method [4,5] for contour approximation is discussed in the paper. The compression abilities, level of introduced distortion, complexity (expressed by the computational time) of this algorithm are measured and compared with some other, appreciated methods. The mean square error, signal-to-noise ratio and number of required operations are used as the main criterions of this comparison. Finally, results of experiments and advantages and drawbacks of the Tangent Method (TM) are discussed. Key-Words: contour representation, contour compression, polygonal approximation, the Ramer method, the MMSE algorithm.
منابع مشابه
Chain code lossless compression using move-to-front transform and adaptive run-length encoding
Chain codes are the most size-efficient representations of rasterised binary shapes and contours. This paper considers a new lossless chain code compression method based on move-to-front transform and an adaptive run-length encoding. The former reduces the information entropy of the chain code, whilst the latter compresses the entropy-reduced chain code by coding the repetitions of chain code s...
متن کاملA New Method for Contour Approximation Using Basic Ramer Idea
Abstract—This paper presented two new efficient algorithms for contour approximation. The proposed algorithm is compared with Ramer (good quality), Triangle (faster) and Trapezoid (fastest) in this work; which are briefly described. Cartesian co-ordinates of an input contour are processed in such a manner that finally contours is presented by a set of selected vertices of the edge of the contou...
متن کاملشناسایی منبع اصلی مولد صدا در واحد تولید هوا یک صنعت پتروشیمی و ارزیابی اثر محصورسازی آن
Aims: Noise is considered the most harmful physical agents in the workplace which exposure to it can cause the harmful physical and psychological effects on worker. Since the best noise control measures is to reduce or limit the at the source, the purpose of this study was to assess the noise pollution and determine the dominant sound source in an Air production plant of a Petrochemical industr...
متن کاملThe contour tree image encoding technique and file format
The process of contourization is presented which converts a raster image into a discrete set of plateaux or contours . These contours can be grouped into a hierarchical structure, defining total spatial inclusion, called a contour tree. A contour coder has been developed which fully describes these contours in a compact and efficient manner and is the basis for an image compression method. Simp...
متن کاملImplementation of VlSI Based Image Compression Approach on Reconfigurable Computing System - A Survey
Image data require huge amounts of disk space and large bandwidths for transmission. Hence, imagecompression is necessary to reduce the amount of data required to represent a digital image. Thereforean efficient technique for image compression is highly pushed to demand. Although, lots of compressiontechniques are available, but the technique which is faster, memory efficient and simple, surely...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2005