relToPixel

Change from relative to fixed pixel coordinate system

Computerized tomography (CT) can be used to assess certain wood properties when wood disks or logs are scanned. Wood density profiles (i.e. variations of wood density from pith to bark) can yield important information used for studies in forest resource assessment, wood quality and dendrochronology studies. The first step consists in transforming grey values from the scan images to density values. The packages then proposes a unique method to automatically locate the pith by combining an adapted Hough Transform method and a one-dimensional edge detector. Tree ring profiles (average ring density, earlywood and latewood density, ring width and percent latewood for each ring) are then obtained.

Robert Schneider

CTRing

Density Profiles of Wood from CT Scan Images

Dipak Mahatara

relToPixel function

<dl><dt>pith_coord</dt>
<dd>Pith coordinates in relative space (x, y)</dd>
<dt>im</dt>
<dd>Density matrix</dd></dl>

Arguments

Change from relative to fixed pixel coordinate system — relToPixel

<dl>

<dt>pith_coord</dt>
<dd>Pith coordinates in relative space (x, y)</dd>


<dt>im</dt>
<dd>Density matrix</dd>

</dl>

relToPixel: Change from relative to fixed pixel coordinate system

Description

Usage

Value

Arguments