Abstract
In recent years, the media develops rapidly, and various media comes up. In the IT (Information-Technology) society, visual information exists a lot. In this situation, mosaic processing is used to hide the image information that must not be understood. However, mosaic, depending on conditions of processing and viewing distance, has a problem such as understanding processed images by mosaic. In this paper, we investigate conditions of understanding Japanese character images under mosaic processing. In addition, we perform visual experiments of the character images for anti-aliasing processing, geometric patterns and contrast.
