Type for a list of points
PtList
is the type used to store a list of points.
This type is taken as input parameter of several functions, such as as contourArea
for example.
PtList
supports the extraction operator (n:step:m)
, returning a matrix containing the point coordinates.
scicv_Init(); img_gray = imread(getSampleImage("shapes.png"), CV_LOAD_IMAGE_GRAYSCALE); canny_img = Canny(img_gray, 100, 100*2, 3); [img_out, contours] = findContours(canny_img, CV_RETR_TREE, CV_CHAIN_APPROX_SIMPLE, [0, 0]); // First contour cnt = contours(1); disp(typeof(cnt)); // Contour point coordinates disp(cnt(:)); | ![]() | ![]() |