Tachistoscopic illumination and masking of real scenes
| Autor: | John W. Philbeck, David Chichka, Daniel A. Gajewski |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Visual perception
Computer science ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Experimental and Cognitive Psychology Environment computer.software_genre Article Arts and Humanities (miscellaneous) Computer graphics (images) Developmental and Educational Psychology Humans Computer Aided Design Computer vision Lighting General Psychology business.industry Distance Perception Visual distance Research Design Fixation (visual) Visual Perception Computer-Aided Design Psychology (miscellaneous) Artificial intelligence Cues business Depth perception computer Photic Stimulation |
| Zdroj: | Behavior Research Methods. 47:45-52 |
| ISSN: | 1554-3528 |
| Popis: | Tachistoscopic presentation of scenes has been valuable for studying the emerging properties of visual scene representations. The spatial aspects of this work have generally been focused on the conceptual locations (e.g., next to the refrigerator) and the directional locations of objects in 2D arrays and/or images. Less is known about how the perceived egocentric distance of objects develops. Here we describe a novel system for presenting brief glimpses of a real-world environment, followed by a mask. The system includes projectors with mechanical shutters for projecting the fixation and masking images, a set of LED floodlights for illuminating the environment, and computer-controlled electronics to set the timing and initiate the process. Because a real environment is used, most visual distance and depth cues may be manipulated using traditional methods. The system is inexpensive, robust, and its components are readily available in the marketplace. This paper describes the system and the timing characteristics of each component. Verification of the ability to control exposure to time scales as low as a few milliseconds is demonstrated. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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