Threshold image

Applies a threshold to an image giving a boolean output

Documentation

Algorithms

adaptive

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.

threshold method:

Method used for calculating adaptive threshold

kernel size:

Size of blocks used during threshold check. Must be an odd number. (default 3)

offset:

Constant subtracted from weighted mean of neighborhood to calculate the local threshold value. (default 0.0)

sigma:

Standard deviation of gaussian kernel when method gaussian is used.

More info: http://scikit-image.org/docs/0.13.x/api/skimage.filters.html#skimage.filters.threshold_local

automatic

Performs global thresholding based a selection of automatic algorithms with none or few parameters

auto threshold method:

Method used for calculating threshold

More info: http://scikit-image.org/docs/0.13.x/api/skimage.filters.html

basic

Compares each channel with a threshold

threshold:

Threshold value to compare with

Definition

Input ports

source image

source image to filter

Output ports

result image

result after filtering

Configuration

Algorithm (algorithm)

(no description)

auto threshold method (auto threshold method)

(no description)

kernel size (kernel size)

(no description)

offset (offset)

(no description)

sigma (sigma)

(no description)

threshold (threshold)

(no description)

threshold method (threshold method)

(no description)

Implementation

class node_threshold.ThresholdImage