i used canny function to detect the contour in my android app but i would now to fill the inside of the forms to treat the image easely.

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please post the original image

sturkmen ( 2016-03-10 16:58:20 -0600 )edit

I post the original image .I would find image contours and fill the contours to make the picture more clear

nadia ( 2016-03-11 04:38:56 -0600 )edit

You can try to use cv::adaptiveThreshold() instead of cv:Canny. Or you can try cv::niBlackThreshold() from the ximgproc in contrib modules. Here I have posted some other statistical thresholds you can try (you have to scroll down).

Here is an actual link to the paper.

matman ( 2016-03-11 11:06:45 -0600 )edit

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answered 2016-03-10 15:31:58 -0600

Adams30
1

use find contour to get the contour of each letter.
then draw contour() using thickness -1

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I don't like just to find contours but i would to fill the inside of contours with white color .i find the Floodfill function is it useful for me in this case?

nadia ( 2016-03-10 15:59:50 -0600 )edit

when you put thickness -1 it will fill every contour for you. i have never use floodfill, so you should give it a try

Adams30 ( 2016-03-10 16:19:20 -0600 )edit

I tried thickness -1 I test it with some formes that i draw and it works really but it doen't work efficiently in my picture case because the contours aren't very clear .Have you an other solution which help me?

nadia ( 2016-03-11 07:07:42 -0600 )edit

I think the problem here is, that cv:Canny will leave a lot of open edges, because of "non maxima suppression". So you can't fill these contours in a satisfactory way. A method to avoid this problem is to blur your image in the first step with cv::GaussianBlur or cv::blur. Than use cv::Sobel or cv::Laplacian and finally use a cv::threshold

matman ( 2016-03-11 12:08:59 -0600 )edit

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i used canny function to detect the contour in my android app but i would now to fill the inside of the forms to treat the image easely.

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i used canny function to detect the contour in my android app but i would now to fill the inside of the forms to treat the image easely. edit

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i used canny function to detect the contour in my android app but i would now to fill the inside of the forms to treat the image easely.