نتایج جستجو برای: scene change detection
تعداد نتایج: 1164246 فیلتر نتایج به سال:
This paper presents a novel scene change detection method using complexity and edge direction based on intra prediction mode in H.264/AVC compressed video. When scene change occurs, there is less temporal correlation between consecutive frames. Therefore, most of macro-blocks are encoded in intra mode. Using this property, the proposed method calculates the percentage of intra mode blocks in ea...
در این پژوهش به منظور بررسی تغییرات دمای سطح زمین در شهرستان ارومیه، ابتدا تصاویر دمای سطح زمین (lst) ماه آگوست سالهای 1998 و 2013 استخراج گردید. سپس تصاویر پوشش گیاهی با اعمال شاخص ndvi برای هر دو سال تهیه گردید. جهت تحلیل و بررسی تغییرات زمانی و مکانی دمای سطح زمین و بررسی ارتباط آن با پوشش گیاهی ، روش های change detection به کار گرفته شد. روش های مورد استفاده عبارتند از تهیه تصاویر تفاضل و ط...
in the present work, a simple and sensitive method was developed for determination of morphine and heroin using gold nanoparticles as resonance rayleigh scattering (rrs) and colorimetric technique’s probe. synthesized gold nanoparticles by sodium citrate reduction method have a negative charge layer on their surfaces because of self-assembled citrate anions on their surface. binding of morphin...
SAR images are perfectly suited for change detection, given that they are not affected by different sun illumination conditions and/or clouds. There is potential to improve the SAR change detection results by taking into account prior knowledge of the scene, which can be obtained from other sources of information such as high resolution optical images and data from Geographic Information System...
In 3 experiments the author investigated the relationship between the online visual representation of natural scenes and long-term visual memory. In a change detection task, a target object either changed or remained the same from an initial image of a natural scene to a test image. Two types of changes were possible: rotation in depth, or replacement by another object from the same basic-level...
In order to process video data efficiently, a video segmentation technique through scene change detection must be employed. Many of advanced video applications require manipulations of compressed video signals. So, the scene change detection process is achieved by analyzing the video directly in the compressed domain, thereby avoiding the overhead of decompressing video into individual frames i...
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