Display contours over image about opencv-processing HOT 1 CLOSED

A couple of things. First you haven’t found the contours in this example. You’ve run a canny filter on the image. Finding contours returns you actual geometric information about the locations of the contours in data. You can then use this data to draw lines on top of the image if you want. See the find contours example to see usage: https://github.com/atduskgreg/opencv-processing/tree/master/examples/FindContours (also installed in processing with the library).

If instead you want to just draw the filtered image you’ve produced here on top of the image from the camera that’s a task that has nothing to do with OpenCV directly. See the processing documentation for more on how to do that: https://processing.org/reference/blendMode_.html

from opencv-processing.