can be difficult to recognize because the viewer initially interprets them as ordinary pieces of the forest. That distinction is what makes hidden-image puzzles so entertaining. Human vision does not operate like a simple camera that gives equal attention to every visible detail. The visual system continuously organizes information, separates likely objects from backgrounds and searches for meaningful patterns.
This process is extremely useful in ordinary life because there is far more visual information around us than we could consciously examine one element at a time. In a puzzle, however,
