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Video Subtraction: Dynamic Temporal Change Versus Intrinsic Colour Instability

Allan G. Farman ; School of Dentistry The Universitiy of Louisville Kentacky 40292, USA
Taeko T. Farman ; School of Dentistry The Universitiy of Louisville Kentacky 40292, USA
William Engilman ; School of Dentistry The Universitiy of Louisville Kentacky 40292, USA
Darren B. Earl ; School of Dentistry The Universitiy of Louisville Kentacky 40292, USA

Puni tekst: engleski, pdf (13 MB) str. 221-230 preuzimanja: 160* citiraj
APA 6th Edition
Farman, A.G., Farman, T.T., Engilman, W. i Earl, D.B. (1998). Video Subtraction: Dynamic Temporal Change Versus Intrinsic Colour Instability. Acta stomatologica Croatica, 32 (2), 221-230. Preuzeto s https://hrcak.srce.hr/97862
MLA 8th Edition
Farman, Allan G., et al. "Video Subtraction: Dynamic Temporal Change Versus Intrinsic Colour Instability." Acta stomatologica Croatica, vol. 32, br. 2, 1998, str. 221-230. https://hrcak.srce.hr/97862. Citirano 28.02.2021.
Chicago 17th Edition
Farman, Allan G., Taeko T. Farman, William Engilman i Darren B. Earl. "Video Subtraction: Dynamic Temporal Change Versus Intrinsic Colour Instability." Acta stomatologica Croatica 32, br. 2 (1998): 221-230. https://hrcak.srce.hr/97862
Harvard
Farman, A.G., et al. (1998). 'Video Subtraction: Dynamic Temporal Change Versus Intrinsic Colour Instability', Acta stomatologica Croatica, 32(2), str. 221-230. Preuzeto s: https://hrcak.srce.hr/97862 (Datum pristupa: 28.02.2021.)
Vancouver
Farman AG, Farman TT, Engilman W, Earl DB. Video Subtraction: Dynamic Temporal Change Versus Intrinsic Colour Instability. Acta stomatologica Croatica [Internet]. 1998 [pristupljeno 28.02.2021.];32(2):221-230. Dostupno na: https://hrcak.srce.hr/97862
IEEE
A.G. Farman, T.T. Farman, W. Engilman i D.B. Earl, "Video Subtraction: Dynamic Temporal Change Versus Intrinsic Colour Instability", Acta stomatologica Croatica, vol.32, br. 2, str. 221-230, 1998. [Online]. Dostupno na: https://hrcak.srce.hr/97862. [Citirano: 28.02.2021.]
Puni tekst: hrvatski, pdf (13 MB) str. 221-230 preuzimanja: 214* citiraj
APA 6th Edition
Farman, A.G., Farman, T.T., Engilman, W. i Earl, D.B. (1998). Video supstrakcija: dinamička privremena promjena prema unutrašnjoj nestabilnosti boje. Acta stomatologica Croatica, 32 (2), 221-230. Preuzeto s https://hrcak.srce.hr/97862
MLA 8th Edition
Farman, Allan G., et al. "Video supstrakcija: dinamička privremena promjena prema unutrašnjoj nestabilnosti boje." Acta stomatologica Croatica, vol. 32, br. 2, 1998, str. 221-230. https://hrcak.srce.hr/97862. Citirano 28.02.2021.
Chicago 17th Edition
Farman, Allan G., Taeko T. Farman, William Engilman i Darren B. Earl. "Video supstrakcija: dinamička privremena promjena prema unutrašnjoj nestabilnosti boje." Acta stomatologica Croatica 32, br. 2 (1998): 221-230. https://hrcak.srce.hr/97862
Harvard
Farman, A.G., et al. (1998). 'Video supstrakcija: dinamička privremena promjena prema unutrašnjoj nestabilnosti boje', Acta stomatologica Croatica, 32(2), str. 221-230. Preuzeto s: https://hrcak.srce.hr/97862 (Datum pristupa: 28.02.2021.)
Vancouver
Farman AG, Farman TT, Engilman W, Earl DB. Video supstrakcija: dinamička privremena promjena prema unutrašnjoj nestabilnosti boje. Acta stomatologica Croatica [Internet]. 1998 [pristupljeno 28.02.2021.];32(2):221-230. Dostupno na: https://hrcak.srce.hr/97862
IEEE
A.G. Farman, T.T. Farman, W. Engilman i D.B. Earl, "Video supstrakcija: dinamička privremena promjena prema unutrašnjoj nestabilnosti boje", Acta stomatologica Croatica, vol.32, br. 2, str. 221-230, 1998. [Online]. Dostupno na: https://hrcak.srce.hr/97862. [Citirano: 28.02.2021.]

Sažetak
Objectives: To evaluate digital subtraction of still video images to show temporal change in a simulated oral hygiene effectiveness trial.
Methods: An acrylic stent was used for the accurate repositioning
of a Stoma Vision (STV) video camera (Trophy Radiologie, Vincennes,
France) to view the anterior teeth and gingivae of a DXTRR manikin
(Dentsply/Rinn, Elgin, Illinois). Images were stored in binary form (16
bit: 5 red; 5 blue: 6 green) within the RVG/STV-PC software provided
by the manufacturer of the camera. Red wax was applied to the manikin to simulate changes in the coverage o f plaque disclosing solutions and gingival inflammation. Videos were also taken over time without manipulation o f the model to evaluate intrinsic colour instability o f the system. Image subtraction followed the formula: g(x1,y)=f(x1,y)-h(x1,y), computing the differences of corresponding pixel from f and h, given the new image y. Histogram analysis for each (red, blue and green) followed the discrete function P(rk)=N/n, where rk is the kth colour level, Nk is the number of pixels in the image with that color level and k=0,l,2,...L~1 is range.
Results: Subtraction o f video images provided solid evidence o f dynamic temporal change where colour contrast was substantial (e.g.
placing a wax red dot over the crown of a tooth). Intrinsic colour instability due to the temperature of light source among other factors was seen over time, especially when the STV was activated for more than one hour. Conclusions: Video subtraction shows potential as a method to quantify changes in disclosed dental hygiene status or tooth coloration over time; however, changes due to colour temperature modification over time need to be factored.

Ključne riječi
dental hygiene; digital imaging; digital subtraction; image processing

Hrčak ID: 97862

URI
https://hrcak.srce.hr/97862

[hrvatski]

Posjeta: 587 *