نتایج جستجو برای: scene change detection
تعداد نتایج: 1164246 فیلتر نتایج به سال:
Scene change detection is an essential process of frame rate up-conversion (FRUC). The performance FRUC highly dependents on the accuracy scene detection. This paper proposes a new scene-change method that uses analysis luminance level histograms for FRUC. histogram refers to statistical average value obtained from generated each region. Existing histogram-based methods calculate difference bet...
This paper proposes a method for detecting changes of a scene using a pair of its vehicular, omnidirectional images. Previous approaches to the problem require the use of a 3D scene model and/or pixel-level registration between different time images. They are also computationally costly for estimating city-scale changes. We propose a novel change detection method that uses features of convoluti...
For video scene analysis, the wipe transition is considered most complex and difficult to detect. In this paper, an effective wipe detection method is proposed using the macroblock (MB) information of the MPEG compressed video. By analyzing the prediction directions of B frames, which are revealed in the MB types, the scene change region of each frame can be found. Once the accumulation of the ...
Nine experiments examined the means by which visual memory for individual objects is structured into a larger representation of a scene. Participants viewed images of natural scenes or object arrays in a change detection task requiring memory for the visual form of a single target object. In the test image, 2 properties of the stimulus were independently manipulated: the position of the target ...
We present a new approach for automatic video scene segmentation and content based indexing. Our approach detects video shots and builds a collection of key frames and representative frames. Scene segmentation and video indexing are based on a temporally windowed principal component analysis of a subsampled version of the video sequence. Two discriminants are derived from the principal componen...
Saccade-contingent change detection provides a powerful tool for investigating scene representation and scene memory. In the present study, critical objects presented within color images of naturalistic scenes were changed during a saccade toward or away from the target. During the saccade,the critical object was changed to another object type, to a visually different token of the same object t...
Robust Estimation of 3-D Line Segments from Satellite Images for Model Building and Change Detection
This paper addresses how to automatically match and reconstruct line segments from multiple satellite images and detect changes in man-made structures by using reconstructed 3-D line segments. We propose a new approach to line reconstruction and use wireframe models to better estimate the actual 3-D geometry by using the incidence relations between reconstructed line segments. Our change detect...
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