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geometry: fix boundingRect throwing for boolean masks

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In 5.0 cv::Mat_<bool>::depth() returns CV_Bool instead of CV_8U, so
boundingRect routed boolean masks into pointSetBoundingRect, which expects
a CV_32S/CV_32F point set and threw. CV_Bool is a 1-byte 0/1 mask type, so
handle it like CV_8U/CV_8S via the byte-wise maskBoundingRect path.
This commit is contained in:
Arnesh Banerjee
2026-07-23 19:32:36 +05:30
parent eccd1c43c4
commit c219bb783d
2 changed files with 32 additions and 2 deletions
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modules/geometry/test/test_boundingrect.cpp
+27
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@@ -96,4 +96,31 @@ TEST(Imgproc_BoundingRect, bug_24217)
}
}
// See https://github.com/opencv/opencv/issues/29578
// cv::Mat_<bool>::depth() returns CV_Bool in 5.0, which regressed boundingRect
// (it used to be treated as CV_8U in 4.x). A boolean mask must be handled as a
// byte-wise mask, matching the CV_8UC1 result.
TEST(Imgproc_BoundingRect, bool_mask_29578)
{
for (int image_width = 3; image_width < 20; image_width++)
{
for (int image_height = 1; image_height < 15; image_height++)
{
cv::Rect rect(0, image_height - 1, 3, 1);
cv::Mat_<bool> mask(cv::Size(image_width, image_height), false);
mask(rect).setTo(true);
cv::Mat_<uchar> ref(cv::Size(image_width, image_height), (uchar)0);
ref(rect).setTo(255);
EXPECT_EQ(mask.depth(), CV_Bool);
cv::Rect result;
ASSERT_NO_THROW(result = boundingRect(mask));
EXPECT_EQ(result, rect);
EXPECT_EQ(result, boundingRect(ref));
}
}
}
}} // namespace