![]() In the figure above, we have segmented the skin/hand from the image, computed the convex hull (outlined in blue) of the hand contour, and then found the extreme points along the convex hull ( red circles).īy computing the extreme points along the hand, we can better approximate the palm region (highlighted as a blue circle): Figure 2: Using extreme points along the hand allows us to approximate the center of the palm. A great example of such an application is hand gesture recognition: Figure 1: Computing the extreme coordinates along a hand contour While this skill isn’t inherently useful by itself, it’s often used as a pre-processing step to more advanced computer vision applications. ![]() In the remainder of this blog post, I am going to demonstrate how to find the extreme north, south, east, and west (x, y)-coordinates along a contour, like in the image at the top of this blog post. Looking for the source code to this post? Jump Right To The Downloads Section Finding extreme points in contours with OpenCV
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