offset_alpha

Internal shift helper used by <code>fill_alpha_gaps()</code>. 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.

internal

Uses convolution-based techniques to generate simulated camera bokeh, depth of field, and other camera effects, using an image and an optional depth map. Accepts both filename inputs and in-memory array representations of images and matrices, including common raster formats such as 'JPEG', 'PNG', 'TIFF', 'TGA', 'BMP', 'PSD', 'GIF', 'HDR', 'PIC', 'PNM', 'DNG', and 'EXR'. Includes functions to perform 2D convolutions, color correction, colorspace conversion, image/matrix reorientation and resizing, image and text overlays, exposure adjustment, camera vignette effects, and image titles.

Tyler Morgan-Wall

rayimage

Image Processing for Simulated Cameras

offset_alpha function

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

Arguments

Offset Alpha Matrix — offset_alpha

<dl>

<dt>alpha</dt>
<dd>Numeric alpha matrix.</dd>


<dt>row_offset</dt>
<dd>Integer row offset. Positive values sample from rows below
each output pixel.</dd>


<dt>col_offset</dt>
<dd>Integer column offset. Positive values sample from columns
to the right of each output pixel.</dd>

</dl>

offset_alpha: Offset Alpha Matrix

Description

Usage

Value

Arguments