Line segment detector crashes when no keylines found! #647
Description
This bug report follows This question at OpenCV Answers. In short, the line detector (both of them) crash when no keylines are found. Either a graceful error (throw etc.) or a normal behavior (e.g. set the keylines detector to a special value that will produce a descriptor of all-zeroes), would be fine.
The code fails at line 2475 of binary_descriptor.cpp, with an Access violation writing location 0x0000000000000000 message.
The image, a minimal reproducing example, and possibly some more info can be found at the above mentioned Opencv Answers question.
UPDATE: Since answers.opencv.org seems to be down, i will repost all necessary info here:
The image i refer to is
The code that crashes is cv::Mat Image= cv::imread("pathToImage", CV_LOAD_IMAGE_COLOR); Ptr<cv::line_descriptor::BinaryDescriptor> LINES = cv::line_descriptor::BinaryDescriptor::createBinaryDescriptor(); std::vector<cv::line_descriptor::KeyLine> keylines; LINES->detect(Image, keylines);