Create a new RGB OpenCV image using Python

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Possible Duplicate    OpenCv CreateImage Function isn   t working       I wish to create a new RGB image in OpenCV using Python  I don t want to load the image from a file  just create an empty image ready to do operations on

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CreateImage size  depth  channels   https   opencv willowgarage com documentation python core operations on arrays html CreateImage

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The new cv2 interface for Python integrates numpy arrays into the OpenCV framework  which makes operations much simpler as they are represented with simple multidimensional arrays   For example  your question would be answered with   import cv2    Not actually necessary if you just want to create an image  import numpy as np blank image   np zeros  height width 3   np uint8    This initialises an RGB-image that is just black   Now  for example  if you wanted to set the left half of the image to blue and the right half to green   you could do so easily   blank image   0 width  2     255 0 0          B  G  R  blank image   width  2 width     0 255 0    If you want to save yourself a lot of trouble in future  as well as having to ask questions such as this one  I would strongly recommend using the cv2 interface rather than the older cv one   I made the change recently and have never looked back   You can read more about cv2 at the OpenCV Change Logs

[python] Create a new RGB OpenCV image using Python?

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