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fix testBoardSubpixelCoords#3224

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opencv-pushbot merged 1 commit intoopencv:4.xfrom
AleksandrPanov:fix_testBoardSubpixelCoords
Apr 13, 2022
Merged

fix testBoardSubpixelCoords#3224
opencv-pushbot merged 1 commit intoopencv:4.xfrom
AleksandrPanov:fix_testBoardSubpixelCoords

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@AleksandrPanov AleksandrPanov commented Apr 11, 2022

Merge with extra: opencv/opencv_extra#969
This PR fix and enable testBoardSubpixelCoords test.
Old test image:
trivial_board_detection
This ChArUco board configuration is currently not possible. The top left square should always be black.

New test image:
new_trivial_board_detection
Blur added to the new test image to make the test more useful (the old image was also blurry, but not as much).

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  • I agree to contribute to the project under Apache 2 License.
  • To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV
  • The PR is proposed to the proper branch
  • There is a reference to the original bug report and related work
  • There is accuracy test, performance test and test data in opencv_extra repository, if applicable
    Patch to opencv_extra has the same branch name.
  • The feature is well documented and sample code can be built with the project CMake

Comment on lines -622 to -624
// load board image with corners at round values
cv::String testImagePath = cvtest::TS::ptr()->get_data_path() + "aruco/" + "trivial_board_detection.png";
Mat img = imread(testImagePath);
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Now the test image is generated.

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@AleksandrPanov AleksandrPanov Apr 11, 2022

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The positions of the "gold" markers have changed.


// generate ChArUco board
board->draw(Size(res.width, res.height), gray, 150);
cv::GaussianBlur(gray, gray, Size(5, 5), 1.0);
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Blur test image.


cv::Mat c_ids, c_corners;
cv::aruco::interpolateCornersCharuco(corners, ids, gray, board, c_corners, c_ids, K);
cv::Mat corners_reshaped = c_corners.reshape(1);
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variable corners_reshaped was not used

c_ids = cv::Mat();
c_corners = cv::Mat();
cv::aruco::interpolateCornersCharuco(corners, ids, gray, board, c_corners, c_ids);
corners_reshaped = c_corners.reshape(1);
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variable corners_reshaped was not used


ASSERT_EQ(c_corners.rows, expected_corners.rows);
EXPECT_NEAR(0, cvtest::norm(expected_corners, c_corners.reshape(1), NORM_INF), 1e-3);
EXPECT_NEAR(0, cvtest::norm(expected_corners, c_corners.reshape(1), NORM_INF), 1e-1);
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Reduced accuracy requirement to 0.1 of a pixel.


ASSERT_EQ(c_corners.rows, expected_corners.rows);
EXPECT_NEAR(0, cvtest::norm(expected_corners, c_corners.reshape(1), NORM_INF), 1e-3);
EXPECT_NEAR(0, cvtest::norm(expected_corners, c_corners.reshape(1), NORM_INF), 1e-1);
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Reduced accuracy requirement to 0.1 of a pixel.

@AleksandrPanov AleksandrPanov marked this pull request as ready for review April 11, 2022 15:31
@asmorkalov
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LGTM: Tested on Ubuntu 18.04 amd64.

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3 participants