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I know that a Laplacian filter is based on matrix convolution, but I just can't seem to make sense of the values produced by skimage.filters's ...

skimage.filters. correlate_sparse (image, kernel, mode='reflect') [source] Compute valid cross-correlation of padded_array and kernel. This function is fast when kernel is large with many zeros. See scipy.ndimage.correlate for a description of cross-correlation. Parameters imagendarray, dtype float, shape (M, N, [ …,] P) The input array.

Image filtering theory¶. Filtering is one of the most basic and common image operations in image processing. You can filter an image to remove noise or to enhance features; the filtered image could be the desired result or just a preprocessing step. …

skimage.filter.denoise_bilateral(*args, **kwargs) Deprecated function. Use skimage.restoration.denoise_bilateral instead. Denoise image using bilateral filter. This is an edge-preserving and noise reducing denoising filter. It averages pixels based on their spatial closeness and radiometric similarity.

The following are 8 code examples for showing how to use skimage.filters.median().These examples are extracted from open source projects. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example.

scikit-image/skimage/filters/edges.py ... Sobel and Prewitt filters originally part of CellProfiler, code licensed under. both GPL and BSD licenses.

skimage.filters.gabor_filter(image, frequency, theta=0, bandwidth=1, sigma_x=None, sigma_y=None, n_stds=3, offset=0, mode='reflect', cval=0) Return real and imaginary responses to Gabor filter. The real and imaginary parts of the Gabor filter kernel are applied to the image and the response is returned as a pair of arrays.

Now, we illustrate how to apply one of these thresholding algorithms. This example uses the mean value of pixel intensities. It is a simple and naive threshold value, which is sometimes used as a guess value. from skimage.filters import threshold_mean image = data.camera() thresh = threshold_mean(image) binary = image > thresh fig, axes = plt ...

autolevel¶ skimage.filters.rank. autolevel (image, footprint, out = None, mask = None, shift_x = False, shift_y = False, shift_z = False) [source] ¶ Auto-level image using local histogram. This filter locally stretches the histogram of gray values to cover the …

Gabor filter is a linear filter with a Gaussian kernel which is modulated by a sinusoidal plane wave. Frequency and orientation representations of the Gabor ...

Minimum Mean Square Error (Wiener) inverse filter. skimage.filters.gaussian (image[, sigma, …]) Multi-dimensional Gaussian filter. skimage.filters ...

skimage.filter.threshold_adaptive(image, block_size, method='gaussian', offset=0, mode='reflect', param=None) ¶. Applies an adaptive threshold to an array. Also known as local or dynamic thresholding where the threshold value is the weighted mean for the local neighborhood of a pixel subtracted by a constant.

Return complex 2D Gabor filter kernel. skimage.filters.gaussian (image, sigma[, ...]) Multi-dimensional Gaussian filter.

skimage.filter.threshold_adaptive(image, block_size, method='gaussian', offset=0, mode='reflect', param=None)¶ Applies an adaptive threshold to an array. Also known as local or dynamic thresholding where the threshold value is the weighted mean for the local neighborhood of a pixel subtracted by a constant.

The following are 30 code examples for showing how to use skimage.filters.gaussian().These examples are extracted from open source projects. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example.

butterworth¶ skimage.filters. butterworth (image, cutoff_frequency_ratio = 0.005, high_pass = True, order = 2.0, channel_axis = None) [source] ¶ Apply a Butterworth filter to enhance high or low frequency features. This filter is defined in the Fourier domain. Parameters

The following are 8 code examples for showing how to use skimage.filters.sobel(). These examples are extracted from open source projects.

Image filtering theory¶. Filtering is one of the most basic and common image operations in image processing. You can filter an image to remove noise or to enhance features; the filtered image could be the desired result or just a preprocessing step. Regardless, filtering is an important topic to understand.