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2017-01-26 23:33:24 -0500 commented answer HoughLine parameter

Thank you very much. That answer my question.

2017-01-26 23:31:39 -0500 received badge  Scholar (source)
2017-01-26 02:13:39 -0500 asked a question HoughLine parameter

I want to use houghline to detect lines in image. I read the concept of houghline in openCV website

According to this api call HoughLines(InputArray image, OutputArray lines, double rho, double theta, int threshold, double srn=0, double stn=0 ) and this explanation rho – Distance resolution of the accumulator in pixels. theta – Angle resolution of the accumulator in radians.

I still conduse what is rho and theta in parameter do. Isn't the result of houghLines, OutputArray lines, defined in term of rho, theta?

Could you explain a purpose of rho and theta in parameter?