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Open Source Computer Vision Library
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71 lines
2.4 KiB
71 lines
2.4 KiB
#!/usr/bin/env python |
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''' |
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=============================================================================== |
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Interactive Image Segmentation using GrabCut algorithm. |
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=============================================================================== |
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''' |
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# Python 2/3 compatibility |
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from __future__ import print_function |
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import numpy as np |
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import cv2 as cv |
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import sys |
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from tests_common import NewOpenCVTests |
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class grabcut_test(NewOpenCVTests): |
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def verify(self, mask, exp): |
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maxDiffRatio = 0.02 |
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expArea = np.count_nonzero(exp) |
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nonIntersectArea = np.count_nonzero(mask != exp) |
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curRatio = float(nonIntersectArea) / expArea |
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return curRatio < maxDiffRatio |
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def scaleMask(self, mask): |
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return np.where((mask==cv.GC_FGD) + (mask==cv.GC_PR_FGD),255,0).astype('uint8') |
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def test_grabcut(self): |
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img = self.get_sample('cv/shared/airplane.png') |
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mask_prob = self.get_sample("cv/grabcut/mask_probpy.png", 0) |
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exp_mask1 = self.get_sample("cv/grabcut/exp_mask1py.png", 0) |
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exp_mask2 = self.get_sample("cv/grabcut/exp_mask2py.png", 0) |
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if img is None: |
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self.assertTrue(False, 'Missing test data') |
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rect = (24, 126, 459, 168) |
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mask = np.zeros(img.shape[:2], dtype = np.uint8) |
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bgdModel = np.zeros((1,65),np.float64) |
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fgdModel = np.zeros((1,65),np.float64) |
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cv.grabCut(img, mask, rect, bgdModel, fgdModel, 0, cv.GC_INIT_WITH_RECT) |
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cv.grabCut(img, mask, rect, bgdModel, fgdModel, 2, cv.GC_EVAL) |
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if mask_prob is None: |
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mask_prob = mask.copy() |
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cv.imwrite(self.extraTestDataPath + '/cv/grabcut/mask_probpy.png', mask_prob) |
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if exp_mask1 is None: |
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exp_mask1 = self.scaleMask(mask) |
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cv.imwrite(self.extraTestDataPath + '/cv/grabcut/exp_mask1py.png', exp_mask1) |
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self.assertEqual(self.verify(self.scaleMask(mask), exp_mask1), True) |
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mask = mask_prob |
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bgdModel = np.zeros((1,65),np.float64) |
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fgdModel = np.zeros((1,65),np.float64) |
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cv.grabCut(img, mask, rect, bgdModel, fgdModel, 0, cv.GC_INIT_WITH_MASK) |
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cv.grabCut(img, mask, rect, bgdModel, fgdModel, 1, cv.GC_EVAL) |
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if exp_mask2 is None: |
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exp_mask2 = self.scaleMask(mask) |
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cv.imwrite(self.extraTestDataPath + '/cv/grabcut/exp_mask2py.png', exp_mask2) |
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self.assertEqual(self.verify(self.scaleMask(mask), exp_mask2), True) |
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if __name__ == '__main__': |
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NewOpenCVTests.bootstrap()
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