Filter image¶
Applies simple filtering or scaling algorithms on an image. For more complex operations see the more specialized image manipulation nodes
Documentation¶
Algorithms¶
- abs
Computes absolute value or complex magnitude of image
- angle
Gives the phase angle of a complex image
- center image
Shifts image so that center of mass lies in center of image
- clamp
Restricts the output values to a given maximum/minimum
- minimum:
The minimum output value that can be passed through
- maximum:
The maximum output value that can be passed through
- gaussian
Two-dimensional Gaussian filter
- sigma-x:
Standard deviation of gaussian filter along X-axis
- sigma-y:
Standard deviation of gaussian filter along Y-axis
- border mode:
Determines how the array borders are handled
- k:
Value outside image borders when method constant is used.
More info: http://scikit-image.org/docs/0.13.x/api/skimage.filters.html#skimage.filters.gaussian
- hessian determinant
Computes an approximation of the determinant of the hessian matrix for each pixel.
- sigma:
Standard deviation of gaussian kernel (default 3.0) used for calculating Hessian. Approximation is not reliable for sigma < 3.0
More info: http://scikit-image.org/docs/0.13.x/api/skimage.feature.html#skimage.feature.hessian_matrix_det
- imag
Gives the imaginary part of a complex image
- integral image
Creates the integral image of the input. An integral image contains at coordinate (m,n) the sum of all values above and to the left of it:
S(m,n) = sum(im[0:m, 0:n])More info: http://scikit-image.org/docs/0.13.x/api/skimage.feature.html#skimage.feature.hessian_matrix_det
- normalize
Adds a (positive) scale and offset so that smallest/highest value in image becomes 0 and 1 respectively. Operates on each channel separately
- minimum:
Minimum value after normalization
- maximum:
Maximum value after normalization
- real
Gives the real valued part of a complex image
- scale/offset
Adds a scale and/or an offset to each channel equally
- scale:
Scale factor applied to image before offset
- offset:
Offset applied to image after scale
- to integer
Converts all channels into integer data
Definition¶
Input ports¶
- source image
source image to filter
Output ports¶
- result image
result after filtering
Configuration¶
- Algorithm (algorithm)
(no description)
- border mode (border mode)
(no description)
- k (k)
(no description)
- maximum (maximum)
(no description)
- minimum (minimum)
(no description)
- offset (offset)
(no description)
- scale (scale)
(no description)
- sigma (sigma)
(no description)
- sigma-x (sigma-x)
(no description)
- sigma-y (sigma-y)
(no description)
Implementation¶
- class node_general_filters.GeneralImageFiltering[source]