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2016-04-26 05:30:12 -0500 commented question Is there suggestion on extracting white line?

But it works like edge detection

2016-04-26 05:21:39 -0500 asked a question Is there suggestion on extracting white line?

image description I have some trouble in it. 1.The diffrence of white line with background is not intense enough. 2.The singular threshold is uneffective because the image is very different in illumination

2016-04-13 04:07:56 -0500 answered a question .exe file - world300d.lib missing

.lib?Isn't .dll? I think you shold put relvant .dll into the executable folder. However,you can try static compilation

2015-12-16 21:00:23 -0500 commented answer How to ensure the position of this pattern?

Okay,Thank your for your help. I will tell you the progress.

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2015-12-15 22:20:17 -0500 commented answer How to ensure the position of this pattern?

Thanks for your answers.However,it is not easy to detect red circles. The fans have two diffrent color:red and blue,I don't know the reason why "houghcircles" can't work it well. Pictures of red fans have been added to the question.

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2015-12-15 07:26:07 -0500 commented question How to ensure the position of this pattern?

V shapes?How to detect it?I think it is not standard V shape neither.

2015-12-15 06:24:53 -0500 commented question How to ensure the position of this pattern?

To grab the fan,so we want to know the position of the fan.Do you have some suggestion

2015-12-15 06:02:00 -0500 asked a question How to ensure the position of this pattern?

Recently we are comparing for a robot competition. There is a task that needs our robot to grab the fan blade. we decide to use image technology to complete the mission. However,it's not easy to find the center of the circle.Because the edge is not obvious. What should I do? image description image description image description image description

2015-09-20 10:07:56 -0500 commented question How to get the corners of rectangle shapes?

Thankyou,but i failed to find the corners using this function,maybe the way i used is wrong.what should i do?

2015-09-20 10:06:24 -0500 commented question How to get the corners of rectangle shapes?

Thankyou,but i failed to find the corners using this function,maybe the way i used is wrong.what should i do?

2015-09-20 09:36:21 -0500 asked a question How to get the corners of rectangle shapes?

image description Recently I received a task. Getting the distance and the angle of rotain between camera and object. I think I can put a rectangle card which is easily to be find on it and caculate the information. However,I have difficulty in it, what should I do?

2015-09-08 09:11:48 -0500 commented question How to Extract track information with OpenCV?

Thank you !It's very efficent!

2015-09-06 22:54:09 -0500 asked a question How to Extract track information with OpenCV?

image description image description Hi,I just need your help. We're preparing for Robocon 2016. according to the rules,our automatic robot need to move down the white line(It is about 3cm in width) We have thresholded the image. Next ,I want to extract the "middle line" to control our robot. So,How to extract it? Some people scan image row by row,find the left edge and right edge.add and divide them by 2. However,It isn't wise when the line is horizontal. How should I do ?Is there some good functions to extract "middle line" and save it in array or other container?