In 4D, some of the operations you can apply to pictures may not be easy to understand. The purpose of this technical note is to provide additional information on how to use logical operators with pictures. An example database is included.
After reading this technical note, it is easy to understand that picture operators are logical operators like those used with Boolean values. Implementing an interface that seems logical, in the general sense of the term, will take a solid understanding of the Boolean logic used in your code.