We live in a colorful world, and it is important for us to receive visual information from colors in situations such as when we read a map. However, such important color-based information cannot be accurately received by some people. These people generally have some type of color vision deficiency such as protanopia or deuteranopia. It is important to realize their difficulties in recognizing differences in colors and provide a solution to this problem. We have proposed a lightness modification method that is designed to convey color information to protanopes and deuteranopes. The proposed method modifies the lightness of an input image by considering color differences so that the modified output image presents visual information for protanopes and deuteranopes. The proposed method changes the lightness of an image without changing the hue. Compared with existing hue changing methods, the output image obtained by the proposed method has more natural colors. Compared with existing lightness modification methods, the output image obtained by the proposed method has more contrast. In this paper, improvement points and parameter setting about the proposed method is described in details. We conducted experiments to show features of the proposed method against existing methods. In addition, we also show the limitation of the proposed method in this paper.

我们生活在一个五彩缤纷的世界中，对于我们来说，在阅读地图等情况下从颜色中接收视觉信息非常重要。但是，这样的重要的基于颜色的信息不能被某些人准确地接收。这些人通常有某种类型的色觉缺乏症，例如，普罗旺斯或硬脑膜外。重要的是要认识到他们在识别颜色差异方面的困难，并为该问题提供解决方案。我们提出了一种亮度修改方法，该方法旨在将颜色信息传达给百足动物和氘代动物。所提出的方法通过考虑色差来修改输入图像的亮度，从而使修改后的输出图像呈现出对角锥和氘代七足动物的视觉信息。所提出的方法在不改变色调的情况下改变图像的亮度。与现有的色调改变方法相比，通过该方法获得的输出图像具有更加自然的色彩。与现有的亮度修正方法相比，该方法获得的输出图像对比度更高。本文详细介绍了该方法的改进点和参数设置。我们进行了实验，以表明该方法相对于现有方法的功能。另外，本文还表明了该方法的局限性。我们进行了实验，以表明该方法相对于现有方法的功能。另外，本文还表明了该方法的局限性。我们进行了实验，以表明该方法相对于现有方法的功能。另外，本文还表明了该方法的局限性。