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The contrast ranges from black at the weakest intensity to white at the strongest. [1] Grayscale images are distinct from one-bit bi-tonal black-and-white images, which, in the context of computer imaging, are images with only two colors: black and white (also called bilevel or binary images). Grayscale images have many shades of gray in between.
Chiaroscuro is used in cinematography for extreme low key and high-contrast lighting to create distinct areas of light and darkness in films, especially in black and white films. Classic examples are The Cabinet of Dr. Caligari (1920), Nosferatu (1922), Metropolis (1927) The Hunchback of Notre Dame (1939), The Devil and Daniel Webster (1941 ...
Conventional black-and-white negative film can be reversal-processed to produce black-and-white slides, as by dr5 Chrome. [8] Although kits of chemicals for black-and-white reversal processing may no longer be available to amateur darkroom enthusiasts, an acid bleaching solution, the only unusual component which is essential, is easily prepared ...
Thus, when an optometrist or ophthalmologist assesses a patient's visual acuity using a Snellen chart or some other acuity chart, the target image is displayed at high contrast, e.g., black letters of decreasing size on a white background. A subsequent contrast sensitivity exam may demonstrate difficulty with decreased contrast (using, e.g ...
White often represents purity or innocence in Western culture, [2] particularly as white clothing or objects, can be stained easily. In most Western countries white is the color worn by brides at weddings. Angels are typically depicted as clothed in white robes. In many Hollywood Westerns, bad cowboys wear black hats while the good ones wear white.
While being one of the most well-known contrast illusions, there are similar effects which cause two regions of identical color to appear differently depending on context: The Cornsweet illusion creates a boundary between two identically-shaded regions with a discontinuous gradient, resulting in the opposing sides appearing to be different.
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