The flag has been renamed to cv2.IMREAD_GRAYSCALE
. Generally speaking, flags now have names prefixed in a manner that relates to the function to which they refer. (e.g. imread
flags start with IMREAD_
, cvtColor
flags start with COLOR_
, etc.)
Read image grayscale opencv 3.0.0-dev
Domanda
I am trying to read images directly as black and white.
I recently updated my OpenCv version to 3.0.0-dev, and the code that I used before does not work anymore.
img = cv2.imread(f, cv2.CV_LOAD_IMAGE_GRAYSCALE)
works fine for 2.4 but does not work for the new version, as there is no field CV_LOAD_IMAGE_GRAYSCALE
.
Any suggestions?
Note: I know that cv2.imread(f,0)
will work, but I do not like having unnamed constants in my code.
Thanks!
Soluzione
Altri suggerimenti
Try this it works for me
import cv2
im_gray = cv2.imread('gray_image.png', cv2.IMREAD_GRAYSCALE)
thresh = 127
im_bw = cv2.threshold(im_gray, thresh, 255, cv2.THRESH_BINARY)[1]
cv2.imwrite('blackwhite.png', im_bw)
Try this, it works for me everytime
import cv2
gray_img = cv2.imread('img.png', 0)
cv2.imshow(gray_img)
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