sampleRGB

Interactive function to sample RGB value from pixel or square area in an image.

Quantification of variation in organismal color patterns as
obtained from image data. Patternize defines homology between pattern positions
across images either through fixed landmarks or image registration. Pattern
identification is performed by categorizing the distribution of colors using RGB
thresholds or image segmentation.

Steven Van Belleghem

patternize

Quantification of Color Pattern Variation

sampleRGB function

<dl><dt>image</dt>
<dd>Image imported as a RasterStack.</dd>
<dt>resampleFactor</dt>
<dd>Integer for downsampling used by <code>redRes</code>.</dd>
<dt>crop</dt>
<dd>Vector c(xmin, xmax, ymin, ymax) that specifies the pixel coordinates to crop the
original image.</dd>
<dt>type</dt>
<dd>Set 'point' to extract RGB from a single point or 'area' to extract from a square
area defined by setting two points (default = 'point').</dd></dl>

Arguments

Interactive function to sample RGB value from pixel or square area in an image. — sampleRGB

<dl>

<dt>image</dt>
<dd>Image imported as a RasterStack.</dd>


<dt>resampleFactor</dt>
<dd>Integer for downsampling used by <code>redRes</code>.</dd>


<dt>crop</dt>
<dd>Vector c(xmin, xmax, ymin, ymax) that specifies the pixel coordinates to crop the
original image.</dd>


<dt>type</dt>
<dd>Set 'point' to extract RGB from a single point or 'area' to extract from a square
area defined by setting two points (default = 'point').</dd>

</dl>

sampleRGB: Interactive function to sample RGB value from pixel or square area in an image.

Description

Usage

Value

Arguments

Examples