| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an image recording method for restraining, by using a partially adapting mask, encrypted images from being fraudulently taken out. <P>SOLUTION: An image recoding method for recording image data in a hologram memory medium while carrying out optical encryption by using a random phase mask for adding random phase components to light is provided. Original image data 3, gradation-inverted dummy image data 4 wherein gradation of the original image data 3 is inverted, and random dummy image data 5 wherein brightness of a plurality of pixels for forming the image is random are recorded in a phase multiple manner on the same image data recording position by successively using the random phase masks different for each image data 3, 4, and 5. <P>COPYRIGHT: (C)2007,JPO&INPIT |
