Aruco , Charuco detection with java and opencv-CodePudding

The

It found nothing,

i've verfied the aruco codes seems te be good the 4x4 50 :

Or by changing the detection dictionary to 6x6 and with this board (the qrcode detection work fine)

CodePudding user response：

ArUco markers shouldn't be placed directly at the edge of the image. And the markers need a complete and wide black border.

If you add some white space around the whole image then the first two markers are detected (id 0 and 1).

If you add some black color to the broken frame of the second row of markers then all markers are detected (id 0, 1, 2 and 3).

Please check this modified input image:

Update

When I run your code above with this image I get the following ouput:

current path is: <my working dir> Welcome to OpenCV 4.6.0 OpenCV Mat: [2; 3; 1; 0] OpenCV size idds 1x4 OpenCV Mat Corner: 4