Find image inside another in SimpleCV

Question

I'm using Python and SimpleCV (but is ok to use OpenCV too) and i have an image:

Futhermore, i have some small images, like this, which were cropped from the original image:

Assuming that the first image contains the second, I would like to get the second's image coordinates in regard of first, before cropping. How I can make this?

Answer 1

Use matchTemplate in OpenCV:

diff = cv2.matchTemplate(img1, img2, cv2.TM_CCORR_NORMED)
x, y = np.unravel_index(np.argmax(diff), diff.shape)