remove all of a contour from image

Question

I need to remove small parts from a binary image. So I find its contours by findContour. Then I find the area of each contour by contourArea. Is there a function that paints all pixels on boundaries and within those contours?

Answer 1

Or, rather, since you're using the OpenCV 2.x API:
drawContours(image, contours, contourIdx, Scalar(255,255,255))

See the documentation for more info.

Answer 2

cvDrawContours( image, contour, 255, 255, 0, CV_FILLED );