I just started learning Image processing. Could someone help me explain this Step3 how to calculate these column? i really don't understand it. So please explain it simply as possible.
Rotation formula -> forward and backward mapping
Flowchart diagram and equations Step1
Forward mapping -> Step2
Backward mapping table1 Step3 <-- here is my question
Backward mapping table1(cont.) -> Step4
Forward mapping and Backward mapping result -> Step5