Failed detection of cropped image

[workingacc123]

Hello,
1.Boxdetect works well for the first image
Input:

Output:

2.Boxdetect fails to detect the checkboxes when used on crop of the image
Input:

Output:

Why does this happen? I want Boxdetect to be able to detect cropped images as well.

[karolzak]

Most likely the kernel size is set too large (or too small) and it's not picking up these other boxes. I advise playing around with different kernel sizes

[workingacc123]

Ok. Thanks for the reply.