在OpenCV Java中识别矩形

Question

I'm trying to crop rectangles out of an image using OpenCV/Java. I've been somewhat successful finding the lines that make up the rectangular sections I want to crop, but I'm having a hard time finding the best way to do the following:

1. Connect the segmented lines I've found (see screenshot below) into separate rectangles (lines can be shared by multiple adjacent rectangles)
2. Determine that a nearly complete rectangle is a rectangle (see broken bottom edge of full rectangle in screenshot, to the left of line #6)

Any guidance is appreciated!

Answer 1

I had been using OpenCV's Impgproc.HoughLinesP , which produced the line segments seen in the question's screenshot. I ended up scrapping that path, opting for a combination of Imgproc.findContours , Imgproc.contourArea and Imgproc.boundingRect instead. This approach worked for me, and allowed me to avoid writing a bunch of recursive line-combining code.