One of the color theory series knows color
Copyright © ASHUIXU Reprint, please stay intact and indicate
Color theory series
Well-known color
Color image
How to choose the color you want
Representation of color in the computer
What is color
The presence of colors is because there are three entities: light, viewed objects, and observer. Physicists have proven white light consisting of red, green, and blue three wavelengths. The human eye is formed by absorbing the color as a red, green, blue formed by an object, and reflects different wavelengths. For example, assume that the user participated in a camping in a sunny day, is preparing to take a red apple. Sunlight is irradiated on the apple, and the red wavelength of the light reflected from the apple to the user's eyes. The wavelength of green and blue is absorbed by the apple. The sensor in the user's eyes responds to the reflected light, transmitting information, which is interpreted by the user's brain as red. The feeling of users on red depends on Apple, rays, and Irs themselves. An apple may absorb more green and blue than another apple, so its color is more red. If the cloud covers the sun, Apple's red has become bleak. The user's feelings of this apple will also be affected by their own physiological conditions, eating Apple's experience or have nothing to eat all day. Make the user see Apple's red, green, and blue three wavelengths of all colors in nature. This is why we often call red, green, and blue three-color primary colors. All colors in the spectrum are composed of different intensities of these three wavelengths. The three primary colors are overlap, they produce a mixed color: blue, magenta, yellow. The base color and the second mixing color are complementary colors of each other. Complementary Colors (complementary color) is the least different from each other. Yellow is made of red and green. Blue is a lack of primary color; therefore, blue and yellow are complementary colors. The green complementary color is magenta, and the red complementary color is cyan. That's why users can see other colors other than red, green, and blue three colors. In a sun flower, the user saw yellow because the red and green wavelength reflected in the eyes of the user, while the blue was absorbed by the sun. The mixture of all primary colors formed a white. The user may think that these colors will be added together to produce a darker color, but don't forget, we are added to light. When we add the wavelength of the light, it will be a brighter color. This is why the base color is often referred to as adding colors.
We get the brightest light by adding the light waves of all colors together: white light. So when we saw a white paper, all red, green, and blue wave were reflected in our eyes. When we see black, all red, green, and blue wave are completely absorbed by objects, so there is no light reflected into our eyes.
Monitor Color Theory - RGB Color Mode
The system created on the monitor is based on the same basic characteristics as the light of the nature: the color can be generated by the three wavelengths of red, green, and blue. This is the basis of RGB color mode.
The monitor is a color, green, and blue phosphorescent material covered on the screen to produce colors by emitting three different intensity beams. When the user sees the red on the screen, the monitor has opened its red beam, and the red beam stimulates the red phosphorescent material to show a red pixel on the screen. Therefore, watching an apple's scan image on the screen with viewing of an apple to eat on the top of a computer. When the user closes the light of the room, you will not see your own red snacks; but the user can still see Apple's scanning image, because the light is emitted from the monitor.
In the RGB color mode, the color of the pixel can be changed by combining the red, green, and blue values. Each of these three primary colors has a range from O to 255. When the user combines 256 red values, 256 green values, 256 blue values, all the colors that can be obtained will be approximately 1.67 million (256 × 256 × 256). It seems that this is already a lot of colors, but don't forget, these are only part of the color in nature. However, 1.67 million colors are enough for copying crystal-clear digital images on monitors connected to a 24-bit color computer. Print Color Theory - CMYK color mode
The basis of the CMYK color mode is not an increase in the light, but reduces the light. In the RGB mode, the creation of colors is implemented by increasing the light. Monitor (or a TV) is a light source capable of creating a color. But a print paper does not emit light; it only absorbs and reflects light. Therefore, when the user wants to convert the color of the monitor to the paper, it must use another color mode CMYK, CMYK is the foundation of four color printing, and the four-color processing print is mainly used on printing machine. Continuous image. (For example, digital illumination). During the four-color printing process, the color is generated by using four different printing plates on a printing press; these four different printing plates are C (Cyan blue), M (Magenta Mango ), Y (YELLOW Yellow) and K (Black Black) BLACK is represented by K, because B may also represent Blue blue. Since the printing paper cannot be transmitted, the printing machine cannot be printed using the RGB color; in contrast, it uses some inks that can absorb specific light wavelengths and reflect other wavelengths. By combining cyan, magenta, and yellow inks, a commercial printing machine can copy the visible spectrum color. In theory, 100% cyan, 1oo% magenta and 100% yellow are made to produce black. However, because the ink is not pure, cyan, magenta and yellow mixed colors are not black, but a blurred tan. Therefore, print workers typically add black in blue, magenta and yellow to produce dark and gray parts in the image. Note that the mixing of each of the two reductions produces a base color.
summary
I will talk about the color of the colors. Do you have some preliminary understanding of the colors, let's talk about the color image.
