Wade Nicholas J
Psychology, Nethergate, University of Dundee, Dundee DD1 4HN, UK.
Vision (Basel). 2025 Jun 3;9(2):47. doi: 10.3390/vision9020047.
Concealing images has been a concern of artists and scientists, as have the conditions that can reveal them. It is relatively easy to hide images in pictures, but this is of little value if they remain hidden. The skill is in revealing previously concealed images. Three aspects of hiding images are examined, two of which are monocular and the third is binocular. Firstly, high-contrast patterns, like Street figures and Mooney faces, have been used in psychological tests of pattern recognition, and Gestalt grouping principles can result in concealing images. Second, it is possible to hide low spatial frequency content carried by high-spatial-frequency patterns. A wider range of carriers than gratings can be used, like graphics, photographs, and combinations of them (photo-graphics). Pictorial images can be concealed in terms of detection or recognition. In both cases, there is interplay between the global features of the concealed image and the local elements that carry it. Third, randomly textured stereograms reveal to two eyes what is concealed from each one alone-stereoscopic depth. The dimension of stereoscopic depth can be manipulated, as can that of binocular rivalry, to conceal images.
隐藏图像一直是艺术家和科学家关注的问题，能够揭示这些图像的条件也是如此。在图片中隐藏图像相对容易，但如果它们一直处于隐藏状态，那就没什么价值了。关键在于揭示先前隐藏的图像。本文探讨了隐藏图像的三个方面，其中两个是单眼方面，第三个是双眼方面。首先，高对比度图案，如街头人物和穆尼脸，已被用于图案识别的心理测试中，格式塔分组原则可能导致图像隐藏。其次，有可能隐藏高空间频率图案所携带的低空间频率内容。可以使用比光栅更广泛的载体，如图形、照片以及它们的组合（照片图形）。图像可以在检测或识别方面被隐藏。在这两种情况下，隐藏图像的全局特征与承载它的局部元素之间存在相互作用。第三，随机纹理立体图向两只眼睛揭示了单独一只眼睛所看不到的内容——立体深度。立体深度的维度可以像双眼竞争的维度一样被操控，以隐藏图像。
