Indirect, N Dimensional Displacement Addressing Mechanism for an Image Processor
Original Publication Date: 1983-Mar-01
Included in the Prior Art Database: 2005-Feb-06
For addressing picture elements (pixels) in the vicinity of a current operating point during image processing operations, the following technique is suggested: The relative displacement between a pixel and the operating point is inserted as the immediate operand into the instruction for that pixel. A table comprising the absolute displacement values (based on selected dimension, etc.) is provided which can be looked up by using relative displacements as selectors or addresses. When a pixel is being evaluated, i.e., the respective instruction is executed, it is only necessary to access the table using the relative displacement to obtain the absolute displacement. This saves arithmetic operations which would otherwise be necessary during execution.