By Robert L. Myers
Demonstrate Interfaces. basics and criteria КНИГИ ;ТЕХНИКА Название: exhibit Interfaces. basics and StandardsАвтор: Bob Myers, Robert L. MyersГод: 2002 г.Страниц: 289 стр.Формат: pdfЯзык: английскийИздание: John Wiley & Sons, LtdРазмер: 6.93 mbISBN:0471499463Дисплейные интерфейсы. Основы и стандарты. Название говорит само за себя. Чтобы правильно понять эту книгу, знание английского - ОБЯЗАТЕЛЬНО.Скачать demonstrate Interfaces. basics and criteria c eighty five
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Additional info for Display Interfaces. Fundamentals and Standards
The blue object(s) are seen as behind the red, through chromostereopsis (the perception of depth resulting solely from color differences rather than actual differences in the physical distance between objects). Due to these problems, the use of such colors in close proximity – bright red text on a blue background, for instance – is to be avoided. 6 Stereopsis Besides the false sense of visual depth mentioned above, human beings are, of course, very capable of seeing true depth – we have “three-dimensional,” or stereoscopic vision.
Clearly, the perception of motion is going to be governed by how rapidly our eyes can process new images, or changes in the visual information presented to them. It takes time for the receptors to respond to a change in light level, and then time to “reset” themselves in order to be ready for the next change. It takes time for this information to be conveyed to the brain and to be processed. We can reasonably expect, then, that there will be a maximum rate at which such changes can be perceived at all, but that this rate will vary with certain conditions, such as the brightness or contrast of the changing area relative to the background, the size of the object within the visual field, and so forth.
Freedom from “jitter”), uniformity of brightness and color, and requirements for minimizing reflections or “glare” from the screen surface. A summary of specifications regarding some of the more important of these, from the ISO 9241-3 standard, is given in Table 2-1. DISPLAY ERGONOMICS Table 2-1 31 Summary of ISO-9241-3 Ergonomic Requirements for CRT Displays Item ISO-9241-3 Ref. 24 Requirement Min. 400 mm (300 mm in some cases) Horizontal to 60 deg. below horizontal Legible up to 40° from the normal to the surface of the display Min.