Gaussian Blur¶

Applies a gaussian blur filter. Applies median value to central pixel within a kernel size (ksize x ksize). The function is a wrapper for the OpenCV function gaussian blur.

gaussian_blur(device, img, ksize, sigmax=0, sigmay=None, debug=None)**

returns device, blurred image

• Parameters:
  • device - Counter for image processing steps
  • img - img object
  • ksize - kernel size => ksize x ksize box, e.g. (5,5)
  • sigmax - standard deviation in X direction; if 0, calculated from kernel size
  • sigmay - standard deviation in Y direction; if sigmaY is None, sigmaY is taken to equal sigmaX
  • debug - None, "print", or "plot". Print = save to file, Plot = print to screen. Default = None
• Context:
  • Used to reduce image noise

Original image

import plantcv as pcv

# Apply gaussian blur to a binary image that has been previously thresholded.
device, gaussian_img = pcv.gaussian_blur(device, img=img1, ksize=(51,51), sigmax=0, sigmay=None, debug='print')

Gaussian blur (ksize = (51,51))

import plantcv as pcv

# Apply gaussian blur to a binary image that has been previously thresholded.
device, gaussian_img = pcv.gaussian_blur(device, img=img1, ksize=(101,101), sigmax=0, sigmay=None, debug='print')

Gaussian blur (ksize = (101,101))