¿Cómo se cambia el tamaño de los contornos?

How do you resize contours?

How to resize a contour in opencv 2.4. 11 python? (Goal: Object extraction)

1. Resize the contour. Then draw it on the original image.
2. (The one I’m using, without success…) Use the contour to create a mask. Resize the mask. Then add the mask to the original image.

The point is, edge pixels are a local notion: they just point out a significant difference between neighbouring pixels. Contours are often obtained from edges, but they are aimed at being object contours. Thus, they need to be closed curves.

Contours are defined as the line joining all the points along the boundary of an image that are having the same intensity. Contours come handy in shape analysis, finding the size of the object of interest, and object detection. OpenCV has findContour() function that helps in extracting the contours from the image.

How to get an expanded or contracted contour in OpenCV?

1. You can use cv::dilate() and cv::erode() then detect the contours again. – zeFrenchy Mar 27 ’19 at 10:28.
2. How large are the initial contours? How exact has the resulting contour to reflect the shape of original contour?

As nouns the difference between contour and edge is that contour is an outline, boundary or border, usually of curved shape while edge is the boundary line of a surface.

Difference between contour detection & edge detection: Contour detection is mainly used to determine the shape of closed objects as the process to find the contours is to check for the continuous points having same color intensity whereas edge detection is carried by detecting the change in the color intensity.

Using canny edge or the pillow function. but, I could not adjust the contour thickness. You can change thickness by changing param width in getBordered. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question.

Photoshop stroke effect example: http://projectwoman.com/2012/11/smart-objects-and-strokes-in-photoshop.html I was able to extract the edge from an image. Using canny edge or the pillow function. but, I could not adjust the contour thickness. You can change thickness by changing param width in getBordered.

Contour detection is the process of joining all the continuous points along the boundary having same color intensity. Contour detection is a useful method for shape analysis in object detection and recognition. Whereas edge detection is the process of finding the boundaries/edges in images.

Contours can be explained simply as a curve joining all the continuous points (along the boundary), having same color or intensity. The contours are a useful tool for shape analysis and object detection and recognition. For better accuracy, use binary images. So before finding contours, apply threshold or canny edge detection.