Tag Archives: pixel

Threshold an Image using OpenCV

andrew July 13, 2012 July 13, 2012 No Comments on 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… Read more »

Digital Image Processing colour, image processing, pixel, rgb, threshold

Flood Fill using OpenCV

andrew July 13, 2012 July 13, 2012 No Comments on 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… Read more »

Digital Image Processing cvFloodFill, flood fill, image processing, pixel

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