The authors focus on the fact that a pixel can be regarded as an edge pixel if either there is a sharp intensity change on either side of the pixel, or the texture on either side of the pixel is different. A two stage...
详细信息
ISBN:
(纸本)081860777X
The authors focus on the fact that a pixel can be regarded as an edge pixel if either there is a sharp intensity change on either side of the pixel, or the texture on either side of the pixel is different. A two stage generate-and-confirm paradigm is used for detecting all edge pixels in the scene. In the first stage, a directional derivative approach is used for determining all potential edge pixels and the direction of the edge. Each candidate pixel is subjected to two separate tests to confirm whether the edge pixel is a 'step edge' or 'texture edge. ' Only these edge pixels which pass one of the two tests are accepted.
This paper presents a robust, real-time block matching-based tracking method for defomable objects. Block matching has been used for various imageprocessing.applications as well as video coding because it has a regul...
详细信息
ISBN:
(纸本)9781424410651
This paper presents a robust, real-time block matching-based tracking method for defomable objects. Block matching has been used for various imageprocessing.applications as well as video coding because it has a regular computing structure. Video tracking based on block matching, however, fails to provide correct inolion information of the object when;(i) background changes spatio-temporally, (ii) an object deforms, and (iii) occlusion occurs. To solve these problems, background is first generated to localize a deformable object, and the object is defined by the corresponding boundary. Shape of the object is reconstructed by using a set of shape control points (SCPs) inside the object boundary, and the trajectoty of each SCP is traced by block matching. We use an additional SCP preserving step at every certain interval of frames for more efficient object tracking. For the experiment we used a computer generated moving fish sequence and an outdoor sequence. Experimental results show that the proposed tracking g algorithm can solve the problem of existing block matching-based methods, and at the same time it can track an object with occlusion and/or deformation.
An approach to the motion-based segmentation problem is presented. The designed formalism includes 2-D motion models and relies on an explicit partial motion information through a stochastic approach. It leads to the ...
详细信息
ISBN:
(纸本)081860777X
An approach to the motion-based segmentation problem is presented. The designed formalism includes 2-D motion models and relies on an explicit partial motion information through a stochastic approach. It leads to the computation of a likelihood ratio test embedded in a split-and-merge procedure. Hence, regions are structured according to motion homogeneity criteria considered in a hierarchical way. This means that segmentation starts with a motion model as simple as possible (e. g. , constant apparent velocity), and, after a complete iteration cycle, a more elaborated motion model can be taken into account.
The retail sector has experienced significant growth in artificial intelligence and computer vision applications, particularly with the emergence of automatic checkout (ACO) systems in stores and supermarkets. ACO sys...
详细信息
Detecting foreground object often need to face the problems of illumination change and image noise. In this paper, we propose an object detection method using two successive image frames. Illumination change would be ...
详细信息
The paper describes a novel comprehensive approach to image-contrast enhancement in the spatial domain. Instead of defining another transformation function our strategy consists of adopting a general functional form, ...
详细信息
With image-based relighting (IBL), one can render realistic relit images of a scene without prior knowledge of object geometry in the scene. However, traditional IBL methods require a large number of basis images, eac...
详细信息
Spike (S) protein of severe acute respiratory syndrome coronavirus (SARS-CoV) associates with cellular receptors to mediate infection of their target cells. This paper studies the genome sequences of S protein and SAR...
详细信息
In laser eye surgery, the accuracy of operation depends on coherent eye tracking and registration techniques. Main approach used in imageprocessing.based eye trackers is extraction and tracking of pupil and limbus re...
详细信息
Low resolution severely degrades the detail of face images, while bad illumination condition further increases the difficulty of face recognition. In this paper, we present a new differential images based face recogni...
详细信息
暂无评论