fill_alpha_gaps

Internal post-process for small distance-transform
quantization artifacts on outline edges. The algorithm first calls
<code>find_border_alpha_gaps()</code> to mark only low-alpha pixels connected to the
image exterior. It then scans horizontal, vertical, and diagonal directions.
For each gap width up to <code>max_gap</code>, <code>offset_alpha()</code> samples the alpha values
on opposite sides of each candidate gap. A candidate pixel is raised to the
weaker of the two neighboring alpha values, and only if that pixel was marked
as border-connected. This bridges edge notches while leaving enclosed
interior holes unchanged.

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

fill_alpha_gaps function

<dl><dt>alpha</dt>
<dd>Numeric alpha matrix.</dd>
<dt>max_gap</dt>
<dd>Default <code>1</code>. Maximum low-alpha run width, in pixels, to bridge.</dd>
<dt>alpha_threshold</dt>
<dd>Default <code>0.25</code>. Alpha threshold used to decide which
pixels are low-alpha border gaps.</dd></dl>

Arguments

Fill Border Alpha Gaps — fill_alpha_gaps

<dl>

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


<dt>max_gap</dt>
<dd>Default <code>1</code>. Maximum low-alpha run width, in pixels, to bridge.</dd>


<dt>alpha_threshold</dt>
<dd>Default <code>0.25</code>. Alpha threshold used to decide which
pixels are low-alpha border gaps.</dd>

</dl>

fill_alpha_gaps: Fill Border Alpha Gaps

Description

Usage

Value

Arguments