J 2008

A digital image analysis approach to measurement of the conodont colour alteration index (CAI): a case study from the Moravo-Silesian Zone, Czech Republic

BÁBEK, Ondřej, Eva FRANCŮ, Jiří KALVODA and Franz NEUBAUER

Basic information

Original name

A digital image analysis approach to measurement of the conodont colour alteration index (CAI): a case study from the Moravo-Silesian Zone, Czech Republic

Name in Czech

Použití digitální analýzy obrazu pro měření indexu barevné alterace konodontů (CAI): případová studie z moravskoslezské zóny, Česká republika

Authors

BÁBEK, Ondřej (203 Czech Republic, guarantor), Eva FRANCŮ (203 Czech Republic), Jiří KALVODA (203 Czech Republic) and Franz NEUBAUER (40 Austria)

Edition

Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen, Stuttgart, E. Schweitzerbartsche Verlagsbuchhandlun, 2008, 0077-7749

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10500 1.5. Earth and related environmental sciences

Country of publisher

Germany

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

Impact factor

Impact factor: 0.423

RIV identification code

RIV/00216224:14310/08:00024876

Organization unit

Faculty of Science

UT WoS

000258751500006

Keywords in English

RGB colour space; conodonts; colour calibration; spectral reflectance; thermal maturation; Devonian; Carboniferous; Variscides

Tags

Tags

International impact, Reviewed
Změněno: 29/6/2009 09:12, prof. RNDr. Jiří Kalvoda, CSc.

Abstract

ORIG CZ

V originále

Presented is a simple non-destructive method for quantifying conodont colour based on digital processing of conodont images taken by a digital camera attached to a binocular microscope operating under incident light, using the RGB colour space. The digital colour data was calibrated to a spectral reflectance of the standard colour background. The results from the Moravo-Silesian Zone (MSZ) of the Bohemian Massif, Czech Republic, demonstrate an excellent relationship existing between the digital intensities of the red (R), green (G) and blue (B) colours and CAI in the range from CAI 3 to CAI 6. The R/B colour ratio proved the best proxy of CAI. The R/B ratio decreases with increasing CAI from values of about 1.6 (CAI3) to about 1.0 (CAI5) and then slightly increases to 1.15 (mean for CAI 5.5) and 1.26 (mean for CAI6). It is closely related to CAI (R2 = 0.8974) within CAI 3 to CAI 5 interval. The R/B ratio is similar in concept to the slope of the reflectance curve obtained from the spectral reflectance of conodonts by previous authors, as well as to the shift from yellow and brown colours towards greyscale conodont colours with increasing thermal maturation according to the original definition of CAI. Regional distribution of the CAI and R/B ratio from the MSZ suggests that the digital conodont colour data is closely related to vitrinite reflectance and illite crystallinity data.

In Czech

viz. anglický text

Links

GA205/03/0967, research and development project
Name: Studium tepelné přeměny a vývoje hloubky pohřbení variských karbonátů moravskoslezské pánve na základě indexu barevné přeměny konodontů (CAI)
MSM0021622412, plan (intention)
Name: Interakce mezi chemickými látkami, prostředím a biologickými systémy a jejich důsledky na globální, regionální a lokální úrovni (INCHEMBIOL) (Acronym: INCHEMBIOL)
Investor: Ministry of Education, Youth and Sports of the CR, Interactions among the chemicals, environment and biological systems and their consequences on the global, regional and local scales (INCHEMBIOL)