estimate length/width of food grains

Christof Kluß

2012-09-24 14:59:02 UTC

for the archive...

"Analyze" > "Particle Analyzer" fit ellipse seems to be a good option to
estimate the length and width. major/minor axis of the ellipse
should be approximately equal to length/width of the food grains.

Furthermore this option should have the advantage to be not so sensitive
to noise, shadow or ragged borders of the food grains.

- select straight "Analyze" > "Set Scale"
(set Known Distance and Unit of length)
- select dirt and "Edit" > "Clear"
- "Image" > "Type" > 8-Bit
- "Process" > "Binary" > "Make Binary"
- "Analyse" > "Set Measurements" > Fit ellipse
- "Analyse" > "Anaylse Particles"
- Show > Outlines, Display results, Clear results,
Summarize, Add to Manager, Record Stat ...

- OK, "Major"/"Minor" in Results = length/wide of fitted ellipse.

Christof

Post by Christof KluÃ
Hi
I would like to estimate the length and width of food grains. There is
an article about exactly this topic (Igathinathane et al., 2009). But I
do not find a tutorial how to do this mesasurement.
Do you know instructions, or rather plugins, for this task?
thx
Christof
C. Igathinathane, L.O. Pordesimo, W.D. Batchelor, Major orthogonal
dimensions measurement of food grains by machine vision using ImageJ,
Food Research International, Volume 42, Issue 1, January 2009, Pages
76-84, ISSN 0963-9969, http://dx.doi.org/10.1016/j.foodres.2008.08.013
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