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Edge enhancement

About: Edge enhancement is a research topic. Over the lifetime, 2324 publications have been published within this topic receiving 30962 citations.


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Patent
01 Nov 1974
TL;DR: In this paper, the scanning velocity of the cathode ray tube electron beam is modulated so as to counteract the blurring effect which occurs when a video amplitude transition causes an increase in beam current and a corresponding increase in the size of the electron beam spot at the screen of the camera.
Abstract: Method and apparatus for enhancing the edges of video images displayed on a cathode ray tube. The scanning velocity of the cathode ray tube electron beam is modulated so as to counteract the blurring effect which occurs when a video amplitude transition causes an increase in beam current and a corresponding increase in the size of the electron beam spot at the screen of the cathode ray tube. When such a transition occurs, the beam is deflected in the direction of normal scan at a rate which corresponds to the rate of change in the size of the diameter of the spot so as to substantially arrest the spot edge, thereby causing a displayed video transition to have a better defined vertical edge. Horizontal edges of images are sharpened by auxiliary vertical deflection of the electron beam. Image edges are further improved by a video peaking scheme which eliminates the large spot size growth usually associated with large amplitude video transitions which have been peaked.

26 citations

Journal ArticleDOI
TL;DR: This letter deals with the color image edge enhancement issue using clustering ideas and based on the use of potential functions (Parzen windows) and employing the mountain clustering method and modifying it appropriately.
Abstract: This letter deals with the color image edge enhancement issue using clustering ideas and based on the use of potential functions (Parzen windows). Two algorithms are proposed. The first uses potential functions (PF's) and selects the output as the vector maximizing the PF. The second one elaborates further by employing the mountain clustering method and modifying it appropriately. Both algorithms are robust in the presence of noise, Gaussian and impulsive.

26 citations

Proceedings ArticleDOI
23 Aug 2010
TL;DR: The unified technique for the irradiance correction and appearance enhancement for the real scene is proposed in this paper and the proposed method employed MPC algorithm for the projector camera system and enabled arbitrary appearance control such like photo retouching software in the real world.
Abstract: The unified technique for the irradiance correction and appearance enhancement for the real scene is proposed in this paper. The proposed method employed MPC algorithm for the projector camera system and enabled arbitrary appearance control such like photo retouching software in the real world. In the experiment, the appearance control of saturation enhancement, color removal, phase control, edge enhancement, image blur, makes unique brightness and the other enhancements for the real scene are shown.

26 citations

Patent
27 Jun 2012
TL;DR: In this paper, a method of image enhancement is proposed for use with an image capture device, such as a security document reader, for attenuation, separation or reduction of reflections from objects such as security documents.
Abstract: Methods of image enhancement are disclosed. In one aspect, the method of image enhancement is for use with an image capture device, such as a security document reader, for the attenuation, separation or reduction of reflections from objects, such as security documents.

26 citations

Journal ArticleDOI
TL;DR: A constant transform, which closely approximates the input-dependent KLT, has been found, and chromatic edge enhancement in this space does add significantly to the perception of image detail and enhances its chromatic fidelity, as compared with standard edge enhancement of only the luminance channel.

26 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20231
20228
202148
202061
201947
201851