Detect and fix incomplete rectangle

asked 2016-01-30 05:11:24 -0500

Polyquin gravatar image

Hi all, I am trying to detect the numbers within the white rectangle. My thought process as follows:

  1. binarize the image
  2. detect canny edges
  3. use findContours to detect the contours
  4. for each contour, check for numbers

I am stuck at step 3 for this photo. There is a hand cutting the rectangle which lets findContours detect no rectangle. So my question is how to detect and fix an incomplete rectangle.

image description image description

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I tested Hough Lines on this and it detected nothing, so i think it's more than just using findContours now. Any ideas? I'm trying (1) locate the 'rectangle' then recognise the numbers.

Polyquin gravatar imagePolyquin ( 2016-01-30 08:20:59 -0500 )edit