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Well-log data and the associated extracted attributes have allowed better description of reservoir heterogeneities and more realistic assessment of oil and gas in place. However, the establishment of a complicated nonlinear relationship between logging attributes and reservoir properties has been a major challenge for working geoscientists. Although back propagation neural network is widely and successfully...
The selection of threshold is critical in image segmentation. Based on genetic algorithm, an improved method for selecting the optimal threshold in image segmentation is proposed. In the computational process, the improved GA adjusts crossover probability and mutation probability automatically according to the variance between the target and background, thus overcoming the problems of poor astringency...
Slant Correction plays an important role in the pretreatment during the recognition of vehicle license plate (VLP). To reduce and avoid the interference from the dirt, noise and frame of the VLP, as well as simplify the computation load, a method of slant correction of VLP integrates PCA (Principal Component Analysis) based on color-pair feature and radon transformation is presented in this paper...
Slant Correction plays an important role in vehicle license plate automatic recognition system. In order to reduce or avoid adverse effects caused by noise disturbance and fragmentary frame of vehicle license plate, as well as speed up the computation, an approach based on feature point and principal component analysis (PCA) is presented. Feature points are considered as the edge of characters on...
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