Tag Archives: pixel

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 […]

Digital Image Processing Also tagged , , , Leave a comment

Flood Fill using OpenCV

To use the flood fill, first a seed point is selected, then all neighbouring pixels of a similar colour are converted to a uniform colour. In this example the seed point is at 200, 200 (shown by a blue circle). The neighbouring pixels are then flood filled with a red colour. #include “stdafx.h” #include “cv.h” […]

Digital Image Processing Also tagged , , Leave a comment