White Balance

Corrects the exposure of an image. A color standard can be specified.

white_balance(device, img, debug=None,roi=None,)

returns device, img

  • Parameters:

    • device - device number. Used to count steps in the pipeline
    • img - A gray scale image on which to perform the correction
    • debug - None, "print", or "plot". Print = save to file, Plot = print to screen. Default = None
    • roi - A list of 4 points (x, y, width, height) that form the rectangular ROI of the white color standard. If a list of 4 points is not given, the whole image is used.

  • Context:

    • Used to standardize exposure of images before thresholding

Original image

Screenshot

import plantcv as pcv

# Corrects image based on color standard and stores output as corrected_img
device, corrected_img = pcv.white_balance(device,img,debug="print",(5, 5, 80, 80))

Corrected image

Screenshot