The purpose of this study is to apply digital image processing to original images acquired with common digital devices to generate the resulting images that are easy for the elderly to see without using colorimetric values. Therefore, we propose an image enhancement method to improve color visibility of digital images for the elderly, taking account of their color vision characteristics. The proposed method consists of lightness conversion by adaptive gamma correction according to the effective luminance ratio of the young and the elderly, contrast enhancement using an S-shape function, and hue preservation processing in the RGB color space. The effectiveness of the proposed method is illustrated by comparing it with other conventional methods through experiments using many natural images.

本研究的目的是将数字图像处理应用于使用普通数字设备获取的原始图像，以生成老年人无需使用比色值即可轻松看到的结果图像。因此，我们提出了一种图像增强方法，以提高老年人数字图像的色彩可见性，同时考虑到他们的色觉特性。所提出的方法包括根据年轻人和老年人的有效亮度比通过自适应伽马校正进行亮度转换，使用 S 形函数进行对比度增强，以及在 RGB 色彩空间中进行色调保持处理。通过使用许多自然图像的实验，将其与其他常规方法进行比较，说明了所提出的方法的有效性。