Line detection as only one line

#LineDetection

asked 2014-10-05 09:46:45 -0600

I have scanned papers with some quite straight lines. I'd like to get every line as a mathematical function. In openCV there is HoughLinesP that detect lines but it shows upper edge of my line and bottom edge of my line. The second problem is that there is usually few lines very close to themselves (because lines are not perfect). I need method that show me only one line the most closest to my scanned line.

What should I use?

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hi peter,

put your entire code here then easy to understand exactly what is goingon in code

Thank you,

it's gov...

govardhana padavala ( 2014-10-06 01:53:13 -0600 )edit

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answered 2014-10-05 11:17:32 -0600

aliavci
76 ●2 ●4

updated 2014-10-06 10:09:59 -0600

Make a new function to calculate the slope of a line by using the 2 points in a single line. You can do this with the y and x values of the line's points. Do this for every line.
Use the gradient to separate between horizontal lines and vertical looking lines
Find the end points of the line you want to draw by search end points by searching the end points of all the lines according to gradient and place where you might see that point.

An example for part 3 is when searching a horizontal line: Use gradient function to filter horizontal lines, then search the x values of all points to keep the lowest x and highest x only.

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This made it even more unclear to me ...

StevenPuttemans ( 2014-10-06 06:15:52 -0600 )edit

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Line detection as only one line

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