<div dir="ltr"><div><div><div><div>Hello,<br><br><br></div></div>For
 the directions (degrees): 0, 45, 90, 135, if I want to apply them on an
 image, I knew that for instance here: <a href="https://github.com/ComplexSystemsModeling/DCMTK-ITK/blob/master/Modules/Numerics/Statistics/test/itkScalarImageToRunLengthMatrixFilterTest.cxx">https://github.com/ComplexSystemsModeling/DCMTK-ITK/blob/master/Modules/Numerics/Statistics/test/itkScalarImageToRunLengthMatrixFilterTest.cxx</a><br>
<br> {0,-1} is "vertical", and {-1,0} is 
"horizontal".<br><br></div>Can you kindly just clarify to me how it was 
known that the first is vertical and the later is horizontal? And, if we
 want to represent 35 degrees and 135 degrees, how will this be 
represented?<br><br></div>Thanks.<br></div>