High Quality Content by WIKIPEDIA articles! The Sobel operator is used in image processing, particularly within edge detection algorithms. Technically, it is a discrete differentiation operator, computing an approximation of the gradient of the image intensity function. At each point in the image, the result of the Sobel operator is either the corresponding gradient vector or the norm of this vector. The Sobel operator is based on convolving the image with a small, separable, and integer valued...
High Quality Content by WIKIPEDIA articles! The Sobel operator is used in image processing, particularly within edge detection algorithms. Technically, it is a discrete differentiation operator, computing an approximation of the gradient of the image intensity function. At each point in the image, the result of the Sobel operator is either the corresponding gradient vector or the norm of this vector. The Sobel operator is based on convolving the image with a small, separable, and integer valued filter in horizontal and vertical direction and is therefore relatively inexpensive in terms of computations. On the other hand, the gradient approximation which it produces is relatively crude, in particular for high frequency variations in the image.
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Стремительный прогресс в области технологий и новые знания об устройстве видимого и невидимого мира заставляют физиков-теоретиков искать новые объяснения установившемуся порядку вещей. И наиболее интригующими остаются рассуждения о пространстве и времени. С момента публикации мирового бестселлера «Краткая история времени» профессор Стивен Хокинг внимательно следил за развитием астрофизики, пока...
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