نتایج جستجو برای: histogram analysis
تعداد نتایج: 2832487 فیلتر نتایج به سال:
Aims: The rate of adrenal mass detection has increased due to the development imaging modalities. It is vital differentiate benign adenomas from other masses in order establish whether an active management strategy essential. Volumetric CT histogram analysis calculates percentage covered pixels negative attenuation region. goal this research was evaluate diagnostic utility volume for tumors con...
Methods Using texture analysis, we analysed 104 lesions in 104 patients suspected for lung cancer with a positive CT correlate. The analysis was performed using TexRAD (developed by TexRAD Ltd. UK). Histology was our reference standard. Malignancy was present in 92 lesions. CTTA comprised a filtration-histogram technique where filtration extracted and enhanced features of different sizes (fine,...
Color cast defect detection of video image is challenging and of great importance in the field of video quality evaluation, and one of the difficulties therein is how to distinguish a dominant color (caused by a predominant color, such as an image in which blue sky is a basic tone) from an inherent cast (image presenting a cast due to imaging device failure or taken in a special environment, su...
In this paper, we present content based image retrieval using two features color and texture. Humans tend to differentiate images based on color, therefore color features are mostly used in CBIR. Color histogram is mostly used to represent color features but it cannot entirely characterize the image. Color Histogram is also rotation invariant about the view axis. Regularity, directionality, smo...
In this contribution a technique for video segmentation based on joint colour and motion information is presented. The technique entails preand post-processing stages in addition to clustering algorithms to define homogeneous colour patches. As far as motion detection is concerned, enhanced robustness is achieved by extended depth analysis and motion estimation reliability assessment. Final mer...
Histogram equalization is an efficient contrast enhancement algorithm. Global equalization is effective, but enhances only overall contrast, while local histogram equalization is more powerful, but computationally expensive. In this paper, a Block-based Binomial Filtered Histogram Equalization (BBFHE) algorithm is presented. The image is divided into blocks, and for each block a histogram is ob...
Molecular simulations are very convenient to get insight into the structure and thermal behaviour of small atomic clusters. In this paper, we show how the classical Monte Carlo method can be used to tackle both the global optimization problem of molecular structure and the finite temperature properties. Smarter schemes to compute the caloric curves are also illustrated in the example of the his...
This paper presents some automatic shot detection techniques based on color histograms and also on multiresolution histograms. The approaches tested in the submitted runs are mainly focused on cut detection. The main goal of the runs is to study the behaviour of color histogram differences as a first step in the use of multiresolution color histograms into the adaptive threshold algorithm. Some...
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