<< Mat Datatypes PtLists >>

scicv >> Datatypes > PtList

PtList

Type for a list of points

Description

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.

Examples

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(:));

See also


Report an issue
<< Mat Datatypes PtLists >>