This study explored the effects of reflective screen material color and film treatment in holographic projection on image quality. Employing an experimental approach, algorithmic analysis of images captured after projection was conducted to examine image quality. Image analysis was performed using OpenCV software, focusing on quantifying values of average color (RGB), contrast, sharpness, and saturation. The results revealed that changes in the reflective screen material color led to a decrease in average RGB values, by approximately 50%, compared with the transparent colorless screen. A light brown colored material demonstrated more satisfactory sharpness performance compared with the transparent colorless and black color screens. However, differences in contrast and saturation among different colored screens were not particularly noticeable. Regarding film treatment, a decrease in average RGB values for black and dark silver surface films was observed. However, light black and dark silver surface films showed a significant improvement in sharpness. Differences in contrast were not pronounced, and saturation slightly increased after film treatment. The experimental findings further showed that as the thickness of the reflective screen increased, ghosting and blurring became more noticeable at image edges. Nevertheless, tinted materials and film treatment reduced ghosting and blurring. Film treatment with low light transmittance increased surface reflectivity, which resulted in a glare effect around the images on the reflective screen, affecting the viewing experience. The results of this research may be helpful for understanding image qualities and the setting up of holographic projection reflective screens.
Key words: Film treatment; holographic projection; openCV; reflective screen
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