Color photography is photography that uses media capable of capturing and reproducing colors. By contrast, black-and-white monochrome photography records only a single channel of luminance brightness and uses media capable only of showing shades of gray. In color photography, electronic sensors or light-sensitive chemicals record color information at the time of exposure. This is usually done by analyzing the spectrum of colors into three channels of information, one dominated by red, another by green and the third by blue, in imitation of the way the normal human eye senses color. The recorded information is then used to reproduce the original colors by mixing various proportions of red, green and blue light RGB color , used by video displays, digital projectors and some historical photographic processes , or by using dyes or pigments to remove various proportions of the red, green and blue which are present in white light CMY color , used for prints on paper and transparencies on film. Monochrome images which have been " colorized " by tinting selected areas by hand or mechanically or with the aid of a computer are "colored photographs", not "color photographs". Their colors are not dependent on the actual colors of the objects photographed and may be inaccurate.
Media in category "Black-and-white photographs"
Photography is the art, application and practice of creating durable images by recording light or other electromagnetic radiation , either electronically by means of an image sensor , or chemically by means of a light-sensitive material such as photographic film. It is employed in many fields of science, manufacturing e. Typically, a lens is used to focus the light reflected or emitted from objects into a real image on the light-sensitive surface inside a camera during a timed exposure. With an electronic image sensor, this produces an electrical charge at each pixel , which is electronically processed and stored in a digital image file for subsequent display or processing. The result with photographic emulsion is an invisible latent image , which is later chemically "developed" into a visible image, either negative or positive depending on the purpose of the photographic material and the method of processing. A negative image on film is traditionally used to photographically create a positive image on a paper base, known as a print , either by using an enlarger or by contact printing. Several people may have coined the same new term from these roots independently. Hercules Florence , a French painter and inventor living in Campinas, Brazil , used the French form of the word, photographie , in private notes which a Brazilian historian believes were written in
A monochromic  image is composed of one color or values of one color. A monochromatic object or image reflects colors in shades of limited colors or hues. Images using only shades of grey with or without black or white are called grayscale or black-and-white. However, scientifically speaking, monochromatic light refers to visible light of a narrow band of wavelengths see spectral color. Of an image , the term monochrome is usually taken to mean the same as black and white or, more likely, grayscale , but may also be used to refer to other combinations containing only tones of a single color, such as green -and-white or green-and-red. It may also refer to sepia displaying tones from light tan to dark brown or cyanotype "blueprint" images, and early photographic methods such as daguerreotypes , ambrotypes , and tintypes , each of which may be used to produce a monochromatic image. A monochrome computer display is able to display only a single color, often green, amber , red or white, and often also shades of that color. In film photography, monochrome is typically the use of black-and-white film. Originally, all photography was done in monochrome. Although color photography was possible even in the late 19th century, easily used color films, such as Kodachrome , were not available until the mids.
The history of various visual media has typically begun with black and white, and as technology improved, altered to color. However, there are exceptions to this rule, including black-and-white fine art photography , as well as many motion pictures and art films. Most early forms of motion pictures or film were black and white. Some color film processes, including hand coloring were experimented with, and in limited use, from the earliest days of motion pictures. The switch from most films being in black-and-white to most being in color was gradual, taking place from the s to the s. Even when most film studios had the capability to make color films, the technology's popularity was limited, as using the Technicolor process was expensive and cumbersome.