From 6d2cfac3037e35332bad65700aba610fb2a3c966 Mon Sep 17 00:00:00 2001 From: Alexander Alekhin Date: Mon, 15 Oct 2018 17:13:16 +0000 Subject: [PATCH] objdetect: validate QRdecode inputs - drop unnecessary matrix initialization --- modules/objdetect/src/qrcode.cpp | 28 ++++++++++++++++------------ modules/objdetect/test/test_qrcode.cpp | 2 +- 2 files changed, 17 insertions(+), 13 deletions(-) diff --git a/modules/objdetect/src/qrcode.cpp b/modules/objdetect/src/qrcode.cpp index aa269d9..814b67e 100644 --- a/modules/objdetect/src/qrcode.cpp +++ b/modules/objdetect/src/qrcode.cpp @@ -332,7 +332,7 @@ bool QRDetect::localization() const int width = cvRound(bin_barcode.size().width / coeff_expansion); const int height = cvRound(bin_barcode.size().height / coeff_expansion); Size new_size(width, height); - Mat intermediate = Mat::zeros(new_size, CV_8UC1); + Mat intermediate; resize(bin_barcode, intermediate, new_size, 0, 0, INTER_LINEAR); bin_barcode = intermediate.clone(); for (size_t i = 0; i < localization_points.size(); i++) @@ -833,26 +833,29 @@ void QRDecode::init(const Mat &src, const vector &points) bool QRDecode::updatePerspective() { + const Point2f centerPt = QRDetect::intersectionLines(original_points[0], original_points[2], + original_points[1], original_points[3]); + if (cvIsNaN(centerPt.x) || cvIsNaN(centerPt.y)) + return false; + const Size temporary_size(cvRound(test_perspective_size), cvRound(test_perspective_size)); vector perspective_points; perspective_points.push_back(Point2f(0.f, 0.f)); perspective_points.push_back(Point2f(test_perspective_size, 0.f)); - perspective_points.push_back(Point2f(static_cast(test_perspective_size * 0.5), - static_cast(test_perspective_size * 0.5))); - original_points.insert(original_points.begin() + 2, - QRDetect::intersectionLines( - original_points[0], original_points[2], - original_points[1], original_points[3])); - perspective_points.push_back(Point2f(test_perspective_size, test_perspective_size)); perspective_points.push_back(Point2f(0.f, test_perspective_size)); - Mat H = findHomography(original_points, perspective_points); - Mat bin_original = Mat::zeros(original.size(), CV_8UC1); + perspective_points.push_back(Point2f(test_perspective_size * 0.5f, test_perspective_size * 0.5f)); + + vector pts = original_points; + pts.push_back(centerPt); + + Mat H = findHomography(pts, perspective_points); + Mat bin_original; adaptiveThreshold(original, bin_original, 255, ADAPTIVE_THRESH_GAUSSIAN_C, THRESH_BINARY, 83, 2); - Mat temp_intermediate = Mat::zeros(temporary_size, CV_8UC1); + Mat temp_intermediate; warpPerspective(bin_original, temp_intermediate, H, temporary_size, INTER_NEAREST); no_border_intermediate = temp_intermediate(Range(1, temp_intermediate.rows), Range(1, temp_intermediate.cols)); @@ -1054,6 +1057,7 @@ CV_EXPORTS bool decodeQRCode(InputArray in, InputArray points, std::string &deco vector src_points; points.copyTo(src_points); CV_Assert(src_points.size() == 4); + CV_CheckGT(contourArea(src_points), 0.0, "Invalid QR code source points"); QRDecode qrdec; qrdec.init(inarr, src_points); @@ -1061,7 +1065,7 @@ CV_EXPORTS bool decodeQRCode(InputArray in, InputArray points, std::string &deco decoded_info = qrdec.getDecodeInformation(); - if (straight_qrcode.needed()) + if (exit_flag && straight_qrcode.needed()) { qrdec.getStraightBarcode().convertTo(straight_qrcode, straight_qrcode.fixedType() ? diff --git a/modules/objdetect/test/test_qrcode.cpp b/modules/objdetect/test/test_qrcode.cpp index 0f4b485..8ede468 100644 --- a/modules/objdetect/test/test_qrcode.cpp +++ b/modules/objdetect/test/test_qrcode.cpp @@ -121,7 +121,7 @@ TEST(Objdetect_QRCode_basic, not_found_qrcode) EXPECT_FALSE(detectQRCode(zero_image, corners)); #ifdef HAVE_QUIRC corners = std::vector(4); - EXPECT_FALSE(decodeQRCode(zero_image, corners, decoded_info, straight_barcode)); + EXPECT_ANY_THROW(decodeQRCode(zero_image, corners, decoded_info, straight_barcode)); #endif } -- 2.7.4