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Separable filter : ウィキペディア英語版 | Separable filter
A separable filter in image processing can be written as product of two more simple filters. Typically a 2-dimensional convolution operation is separated into 2 onedimensional filters. This reduces the cost of computing the operator. == Examples == 1. A twodimensional smoothing filter is separated in this sample: : 2. Gaussian blur (smoothing) : 3. Sobel operator (edge detection) : This works also for Prewitt operator.
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