Tag Archives: threshold

Image Contour detection and display using OpenCV

In this example we threshold the image based on the position of the track bar. Then find contours on the image an display the contours as white lines. #include “stdafx.h” #include “cv.h” #include “highgui.h” // global variables IplImage* input = NULL; IplImage* gray = NULL; int threshold = 100; CvMemStorage* storage = NULL; /** trackbar […]

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Threshold an Image using OpenCV

The cvThreshold function allows us to reject pixels above or below a set value while keeping the others. In this example the input image is separated into the RGB channels. Then we preform a threshold on the red channel, with a maximum value of 100. The result of this is that all the light areas […]

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