File: precornerdetect.py

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opencv 2.4.9.1%2Bdfsg-1%2Bdeb8u1
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#!/usr/bin/env python

import cv2.cv as cv

def precornerdetect(image):
    # assume that the image is floating-point
    corners = cv.CloneMat(image)
    cv.PreCornerDetect(image, corners, 3)

    dilated_corners = cv.CloneMat(image)
    cv.Dilate(corners, dilated_corners, None, 1)

    corner_mask = cv.CreateMat(image.rows, image.cols, cv.CV_8UC1)
    cv.Sub(corners, dilated_corners, corners)
    cv.CmpS(corners, 0, corner_mask, cv.CV_CMP_GE)
    return (corners, corner_mask)