The CMC tolerance method uses an ellipse to represent the range of color differences visually, and the resulting values are closer to those perceived by the human eye. Therefore, many industries consider that the CMC method for representing color differences is more accurate than the CIELAB method.
CMC, the British Dye and Pigment Association, proposed the elliptical ΔE formula in the CIELAB color space.
Three-dimensional geometric shapes that describe colors.
When an object is heated, the color light it emits is measured. Color temperature is usually expressed in absolute temperature or Kelvin (K) degrees. Low color temperature, such as red, is 2400℃K, high color temperature, such as blue, is 9300℃K, and neutral color temperature, such as gray, is 6500℃K.
An optical measuring instrument that simulates the response of the human eye to red, green and blue light.
D50
The CIE standard illuminant representing a color temperature of 5000℃K. In the printing industry, this color temperature is widely used to create viewing light boxes.
The electromagnetic wave radiation bands that propagate in the air at different sizes, expressed in terms of wavelengths, have different properties. Many wavelengths are beyond the range that the human eye can perceive. Only the electromagnetic radiation with wavelengths ranging from 380nm to 720nm is visible light. Beyond the visible light range are invisible, such as X-rays, gamma rays, microwaves, and radio waves.
Inside the glass bulb is a mercury gas, and the tube has a fluorescent substance coated on its inner wall. When the gas is excited by an electric current, the generated radiation is converted into fluorescent energy, causing the fluorescence to emit light.
The basic colors of an object, such as red, green, and purple, can be determined by their position in the cylindrical color space or on the color wheel.
The℃of the color's intensity.
Use the spectral distribution to illustrate the energy distribution of the light source.
The CIE standard light source, represented by incandescent lamps, has a yellowish-orange color and its corresponding color temperature is 2856℃K.
The tungsten filament lamp that simulates average daylight is the representative standard light source. For example, the color temperature related to this is 6774℃K.
