Comparative Evaluation of Hue Value Chroma using Cross Polarised Photography

Abstract

Introduction: Digital photographs offer a wide range of colour options. They aid in increasing communication between a dentist and a technician by making the morphology, colour, and texture of the teeth easier to visualise. A polarising filter reduces reflections and glare while boosting colour saturation in an image. The aim of the study was to analyse images with and without polarised photography. Methodology: A total of 125 images of shade guidelines were collected for this study, 5 each shade tab for 5 shades (A1 to A4). We looked at the following shade guidance systems: VITA Classical (VITA Zahnfabrik) (control), IPS e. max Ceram (Ivoclar Vivadent) were photographed with a Canon EOS 60D digital camera and a 100-mm Canon Macro Lens. Ambient light, exposure (1/125, f16), ISO (100), flash (ETTL), distance, focusing (1:1), and backdrop were all standardized in the photographs. The Adobe RGB colour system was utilised since it covers nearly half of the Lab colour space. Results: Mean and standard deviation values of images with and without cross polarised photography were compared. Hue, value, chroma of the images were assessed showing no statistical difference among the images with and without cross polarised photography. Conclusion: Compared to visual and digital photographic approaches for choosing shades, the application of polarising filters had negligible effect on shade choice. When routinely practised, shade matching can improve a clinician's ability to choose the appropriate shade. Thus, knowledge and training may help someone become better at shade matching. Keywords: Hue, value, chroma, cross polarised photography, Camera, Ring flash, Micro lens.