find_border_alpha_gaps

Internal helper that classifies which low-alpha pixels are part
of the exterior border region. Pixels below <code>alpha_threshold</code> are considered
low alpha. The algorithm starts from low-alpha pixels on the image boundary
and performs an 8-connected flood fill through other low-alpha pixels.
Low-alpha regions enclosed by pixels at or above <code>alpha_threshold</code> are not
reached, so they are protected from <code>fill_alpha_gaps()</code>.

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

find_border_alpha_gaps function

<dl><dt>alpha</dt>
<dd>Numeric alpha matrix.</dd>
<dt>alpha_threshold</dt>
<dd>Default <code>0.25</code>. Pixels below this alpha are considered
low-alpha gap pixels.</dd></dl>

Arguments

Find Border Alpha Gaps — find_border_alpha_gaps

<dl>

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


<dt>alpha_threshold</dt>
<dd>Default <code>0.25</code>. Pixels below this alpha are considered
low-alpha gap pixels.</dd>

</dl>

find_border_alpha_gaps: Find Border Alpha Gaps

Description

Usage

Value

Arguments