Revision as of 19:46, 11 February 2013

Opencv

Great Resources

cv 2.4.3

• http://docs.opencv.org -> documentation

• http://docs.opencv.org/opencv2refman.pdf / http://cvhci.anthropomatik.kit.edu/download/visionhci09/opencv.pdf -> pdf documentation resources

• http://fossies.org/dox/OpenCV-2.4.3/index.html -> Complete Hierarchical guide to opencv

• http://docs.opencv.org/doc/tutorials/tutorials.html -> tutorials on opencv

A cv2 example

Here is a little program that will capture video from the webcam and display it (you might have to CTRL+C)

"""
This module is used for testing the opencv2 capabilities
"""
import cv2
#get webcam feed
capture = cv2.VideoCapture(0)
while True:
    #combines VideoCapture.grab() and VideoCapture.retrieve()
    retrieval_value, image = capture.read()
    #shows captured image in a window
    cv2.imshow("webcam", image)
    #will stop capture with capatible webcam
    if cv2.waitKey(10) == 27:
        break

cv 2.1

• http://opencv.willowgarage.com/documentation/python/index.html -> documentation
• http://nullege.com/codes/search/cv -> code samples

Concerns

Here we place all of the concerns when migrating to a newer version of opencv or the repercussions of not upgrading.

Migration to Python 3

• Opencv 2.4.3 does not support Python 3

Camera drivers

• Currently, only some camera drivers are supported with the new version of opencv, leading to problems regarding capture. One issue is the inability to cancel the program webcam capture.

Yum repo

• Right now, only the 2.3.1 version of opencv is available in the yum repository