카메라 화이트밸런스 설정과 외부 광원의 색온도에 따른 이미지 획득 결과에 대한 고찰
Consideration of the image acquisition result according to the camera white balance setting and the color temperature of the external light source
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초록
Digital photography is a very useful recording and communication method for both dentists and dental technicians. Intraoral photography can be influenced by a variety of factors. Among them, the digital camera’s white balance setting and interference of external lighting can greatly affect the intraoral photography. The purpose of this study was to analyze the effect of color temperature of ambient light and white balance of digital camera on intraoral digital photography. The maxillary central incisor made of composite resin was used as an intraoral photographic model. In the first experiment, color measurement was performed by changing the ambient light color temperature to 3500°K, 4000°K, 4500°K, 5000°K, 5500°K, and 6000°K. The white balance of the camera was set to 3570°K, 4550°K, and 5500°K, respectively. CIE L*a*b* values of buccal surface region were recorded. ΔE values were obtained by comparing the CIE L*a*b* values obtained in each group. In the second experiment, CIE L*a*b* values were obtained by changing the white balance to 4000°K, 4550°K, 5000°K, and 5500°K in the intraoral photography model. At this time, the color temperature of the ambient light was fixed at 5500°K. ΔE values between each group were obtained in the same way. As a result of the experiment, digital photographs did not show visually perceptible ΔE values for the changing in ambient light color temperature. This was the same for all white balance groups. When the camera’s white balance setting was changed, the ΔE value was more than 3.7, which is a visually perceptible change. In conclusion, digital photographs were more affected by digital camera’s white balance setting than the color temperature of ambient light.
Abstract
Digital photography is a very useful recording and communication method for both dentists and dental technicians. Intraoral photography can be influenced by a variety of factors. Among them, the digital camera’s white balance setting and interference of external lighting can greatly affect the intraoral photography. The purpose of this study was to analyze the effect of color temperature of ambient light and white balance of digital camera on intraoral digital photography. The maxillary central incisor made of composite resin was used as an intraoral photographic model. In the first experiment, color measurement was performed by changing the ambient light color temperature to 3500°K, 4000°K, 4500°K, 5000°K, 5500°K, and 6000°K. The white balance of the camera was set to 3570°K, 4550°K, and 5500°K, respectively. CIE L*a*b* values of buccal surface region were recorded. ΔE values were obtained by comparing the CIE L*a*b* values obtained in each group. In the second experiment, CIE L*a*b* values were obtained by changing the white balance to 4000°K, 4550°K, 5000°K, and 5500°K in the intraoral photography model. At this time, the color temperature of the ambient light was fixed at 5500°K. ΔE values between each group were obtained in the same way. As a result of the experiment, digital photographs did not show visually perceptible ΔE values for the changing in ambient light color temperature. This was the same for all white balance groups. When the camera’s white balance setting was changed, the ΔE value was more than 3.7, which is a visually perceptible change. In conclusion, digital photographs were more affected by digital camera’s white balance setting than the color temperature of ambient light.
참고문헌 (18)
- Jarad F, "The use of digital imaging for colour matching and communication in restorative dentistry", British dental journal, 199, pp.43~49 (2005)
- Schropp L, "Shade matching assisted by digital photography and computer software", Journal of Prosthodontics : Implant, Esthetic and Reconstructive Dentistry, 18, pp.235~241 (2009)
- Tung OH, "Development of digital shade guides for color assessment using a digital camera with ring flashes", Clin Oral Investig, 15, pp.49~56 (2011)
- McLaren E, "Photography in dentistry", Journal of the California Dental Association, 29, pp.735~ (2001)
- Tam WK, "Dental shade matching using a digital camera", J Dent, 40(Suppl 2), pp.e3~10 (2012)
- Casaglia A, "Dental photography today. Part 1: Basic concepts", ORAL & implantology, 8, pp.122~ (2015)
- Snow SR, "Assessing and achieving accuracy in digital dental photography", Journal of the California Dental Association, 37, pp.185~191 (2009)
- Sampaio CS, "Variability of color matching with different digital photography techniques and a gray reference card", The Journal of prosthetic dentistry, 121, pp.333~339 (2019)
- Paul S, "Visual and spectrophotometric shade analysis of human teeth", Journal of dental research, 81, pp.578~582 (2002)
- Yamanel K, "Assessment of color parameters of composite resin shade guides using digital imaging versus colorimeter", Journal of Esthetic and Restorative Dentistry, 22, pp.379~388 (2010)
- Wozniak W, "Proposed guidelines for the acceptance program for dental shade guides", American Dental Association, 1~2 (1987)
- Johnston W, "Assessment of appearance match by visual observation and clinical colorimetry", Journal of dental research, 68, pp.819~822 (1989)
- Yılmaz B, "Outcomes of visual tooth shade selection performed by operators with different experience", Journal of Esthetic and Restorative Dentistry, 31, pp.500~507 (2019)
- Preston JD, "Light and lighting in the dental office", Dent Clin North Am, 22, pp.431~451 (1978)
- Sarafianou A, "Matching repeatability and interdevice agreement of 2 intraoral spectrophotometers", The Journal of prosthetic dentistry, 107, pp.178~185 (2012)
- Dagg H, "The influence of some different factors on the accuracy of shade selection", Journal of oral rehabilitation, 31, pp.900~904 (2004)
- Culpepper WD, "A comparative study of shade-matching procedures", Journal of Prosthetic Dentistry, 24, pp.166~173 (1970)
- Sajjadi SH, "Effects of three types of digital camera sensors on dental specialists’ perception of smile esthetics : A preliminary doubleblind clinical trial", Journal of Prosthodontics, 25, pp.675~681 (2016)