4/21/2017
OpenCV binarization test : threshold, adaptive threshold, otzu
< gist >
< /gist >
And refer to below site :
Otzu :
http://cvlecture.marearts.com/2017/04/opencv-lecture-5-4-otzu.html
adaptive threshold :
http://cvlecture.marearts.com/2017/04/opencv-lecture-5-3-adaptivethreshold.html
threshold :
http://cvlecture.marearts.com/2017/04/opencv-lecture-5-3-adaptivethreshold.html
4/19/2017
OpenCV Background subtraction 3.2 version example (for MOG, MOG2, GMG, KNN)
This is example for background subtraction on opencv 3.2 version
previously, I post 2.7 version example on here.
http://study.marearts.com/2014/04/opencv-study-background-subtractor-mog.html
But some usage is changed, and knn subtraction method is added.
Many people ask that example based on opencv 3.2
refer to below source code
Thank you.
< gist code >
< /gist code >
previously, I post 2.7 version example on here.
http://study.marearts.com/2014/04/opencv-study-background-subtractor-mog.html
But some usage is changed, and knn subtraction method is added.
Many people ask that example based on opencv 3.2
refer to below source code
Thank you.
< gist code >
< /gist code >
4/17/2017
floodFill opencv function example
floodFill function example
< gist >
< /gist >
#tags
CallBackFunc, EVENT_LBUTTONDOWN, setMouseCallback, rectangle, floodFill,
< gist >
< /gist >
#tags
CallBackFunc, EVENT_LBUTTONDOWN, setMouseCallback, rectangle, floodFill,
video show and write keeping original fps
When the video write, we can set parameter in following function..
outVideo.open(".\\outVideo.avi", askFileTypeBox, capture.get(CV_CAP_PROP_FPS), S, Color);
And we can control play speed by waitKey.
double fps = capture.get(CV_CAP_PROP_FPS);
delay Per Second = 1/fps
in milliseconds = 1/fps * 1000
so we delay, waitKey( 1/fps * 1000 )
by the way, it is not exact fps. because it is delayed including other processing in the loop.
for example, data copy, sobel, imshow ...
< gist code >
< /gist code >
#tags
CV_CAP_PROP_FRAME_WIDTH, CV_CAP_PROP_FRAME_HEIGHT, VideoCapture, VideoWriter, waitKey
4/14/2017
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fig 1. Left: set 4 points (Left Top, Right Top, Right Bottom, Left Bottom), right:warped image to (0,0) (300,0), (300,300), (0,300) Fi...
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make well divided linear coordinate And make pair coordinate Please see code for detail explanation. import numpy as np import cv2 ...
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There is shape match function in the OpenCV. The function name is cvMatchShapes. This function compares two contours. If two contours is ...
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input image output image source code import cv2 as cv import numpy as np import sys import random #read image img = ...