Seminar I on Agricultural Process Engineering 農産加工学演習 I

Seminar I on Agricultural Process Engineering農産加工学演習　I

No.5

農学研究科　地域環境科学専攻農学研究科　地域環境科学専攻

近藤　直・清水　浩近藤　直・清水　浩

Naoshi Kondo, Hiroshi ShimizuDivision of Environmental Science & Technology,

Graduate School of Agriculture, Kyoto University

KYOTO UNIVERSITY京都大学

AgriculturalAgriculturalProcessProcessEngineeringEngineeringLaboratoryLaboratory

An energy flow from light source tooutput of TV camera

Image grabber and/or PC

Illumination

TV camera

Object



Optical properties of objects- Spectral reflectance -



Spectral reflectance of plant parts



Spectral reflectance of soil



Oai=ΣE･Ra･Ti･L･S･Δλ (i=1,2)Obi=ΣE･Rb･Ti･L･S･Δλ (i=1,2)

C =Oa2‐Oa1

Oa1＋Oa2

Ob2‐Ob1

Ob1＋Ob2‐ a, b : object

i:filter number



0.850 0.357 0.466

0.999

1.1121

8 5 17 5 16 5 9 5 14 5

Wavelength Band C width

(nm) (nm)Tomato Cucumber Eggplant

980 670 550 800 550 880 520 670 520 680

Mandarin Orange Persimon

Most suitable wavelength bands to discriminate fruits from leaves



Tra

nsm

ittan

ce a

nd

Rel

ativ

e Se

nsiti

vity

(%)

Wavelength (nm)

400 500 600 700 800 900 1000 1100 300

60

20

40

80

0

B G R

500550

670850 970

Interference filter

100

Transmittance of filters suitablefor plant part discrimination



Spectral reflectance of beef, pork, andchicken



Spectral reflectance of insect bodies



Assignment

Describe what you learned on reflectance ofDescribe what you learned on reflectance ofplant parts (fruit, leaf, stem, and flowerplant parts (fruit, leaf, stem, and flowerpetal)petal) in several sentences.in several sentences.

Seminar I on Agricultural Process Engineering 農産加工学演習 I

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