offset_alpha: Offset Alpha Matrix

In rayimage: Image Processing for Simulated Cameras

Offset Alpha Matrix

Description

Internal shift helper used by fill_alpha_gaps(). It returns a same-size alpha matrix shifted by integer row and column offsets, filling newly exposed pixels with zero instead of wrapping. This lets the gap-filling scan compare pixels a fixed distance away on opposite sides of a candidate gap.

Usage

offset_alpha(alpha, row_offset, col_offset)

Arguments

alpha	Numeric alpha matrix.
row_offset	Integer row offset. Positive values sample from rows below each output pixel.
col_offset	Integer column offset. Positive values sample from columns to the right of each output pixel.

Value

Numeric alpha matrix with the same dimensions as alpha.

rayimage documentation built on June 12, 2026, 5:06 p.m.