Get length in pixels between edges of two contours

asked 2018-01-11 05:17:59 -0600

michlvl
58 ●1 ●2 ●5

updated 2018-01-11 08:22:25 -0600

Hi.

I'm using OpenCV 3.3.1 on Windows 7.

I want to get length (in pixels) between two contours. Here are thresholded and original images (figure may rotated by different angles): image description

This is what I need to get:

image description

I can find centers of this figures:

image description

but I dont know how to find distance from center to edge...

Please give me advices.

UPDATE

Thanks @StevenPuttemans for idea, I tried to implement it, but during this time found one more important note that figure's position is changing and it may be rotated by random angle (sorry, I should note about it earlier):

image description

edit retag flag offensive close merge delete

Comments

Get length in pixels

supra56 ( 2018-01-11 05:51:13 -0600 )edit

@supra56 please man, start by reading the question ... he needs a way of defining the outer pixel border, not the actual distance between two points ...

StevenPuttemans ( 2018-01-11 06:39:50 -0600 )edit

@StevenPuttemans.I will stop making comment from now on.

supra56 ( 2018-01-11 07:46:10 -0600 )edit

@supra56 It's all good. Everyone makes mistakes, especially me.

sjhalayka ( 2018-01-11 20:11:10 -0600 )edit

Oh come on ... I did not say you can no longer post comments. Just lately you have been replying without any consideration of what is actually being asked for and thats what I wanted to get you to understand. That is all ... let us not overdramatize this.

StevenPuttemans ( 2018-01-12 03:11:02 -0600 )edit

add a comment

Comments

Thanks for idea, this may works in case contours are not rotaing. Unfortunatelly, my figure can have random angle of rotation, so in this case "lowest X coordinate" is not the most left edge of contour... (added this not in update)

michlvl ( 2018-01-11 08:18:14 -0600 )edit

Will your object still be rectangular. Then you simply need to do edge detection, find the dominant edge direction and rotate your image to a horizontal position.

StevenPuttemans ( 2018-01-11 08:35:41 -0600 )edit

May be you can use minArea for each shape

LBerger ( 2018-01-11 09:37:54 -0600 )edit

hi everyone. have you find a solution for this ? can you share the code please ?

kilwa ( 2020-11-01 15:04:55 -0600 )edit

add a comment

Get length in pixels between edges of two contours

Comments

1 answer

Comments

Links

Question Tools

Stats

Related questions

Get length in pixels between edges of two contours edit

Comments

1 answer

Comments

Links

Question Tools

Stats

Related questions

Get length in pixels between edges of two contours