Contrast:
Contrast refers to the difference between different colors. The greater the contrast, the greater the contrast between the different colors, the so-called black and white, the contrast is too large, the picture appears very dazzling. The smaller the contrast, the smaller the contrast between the different colors.
Brightness:
Brightness refers to how light or dark the image or scene is irradiated on the light. Image brightness is increased, or will be very bright dazzling brightness is smaller, the image will become dark.
Hue:
Hue is the degree of brightness of the primary colors in various color mode image, the range of levels from 0 to 255, a total of 256 tones. For example, a grayscale image, when the tone level is 255, white is, when the level is 0, that is, black, is different among the various shades of gray. In RGB mode, the hues of red, green, and blue primary colors of light and shade, there is green light green, light green, dark green and other different colors.
Tone refers to the basic tendency of color appearance. In lightness, purity and hue of these three elements, certain factors play a leading role useful, you can call it some kind of tone
Hue:
Hue is the color, hue adjustment is to adjust the color of the scene, for example, a rainbow of red, orange, yellow, green, cyan, blue, purple seven-color composition, it will have seven kinds of hues. As the name implies i.e., color appearance of various types of titles, such as red, Prussian blue, lemon yellow. Hue is the primary characteristic color, is the difference between the various colors of the most accurate standards. In fact any color other than black and white has a gray hue attributes, i.e. the hue of the primary colors, secondary colors and secondary colors constituted of
Saturation:
Saturation is the concentration of the color image. The higher the saturation, the more full color, the so-called verdant feeling. The lower saturation colors will appear more obsolete, bleak, the saturation is 0, the image is a grayscale image. Concept can be further appreciated that by adjusting the saturation television saturation.
In image processing, including color models common in HSB (Hue, saturation, brightness), the RGB (red, green, blue), the CMYK (cyan, magenta, yellow, black), and CIE L * a * b *, etc. Therefore, there is also a corresponding color mode RGB, CMYK, Lab and the like. In the HSB color model, hue, saturation, brightness basic description of the image attributes.
Hue or hue (Hue) is reflected from the object transmitted through an object or color. At 0 ° to 360 ° on a standard color wheel, by location metric hue. Under normal circumstances, the hue is identified by the color names such as red, orange or green.
Luminance (or the Brightness intensity) is the relative lightness or darkness of the color, usually measured in percentage from 0% (black) to 100% (white)
Tone image generally refers to the overall brightness of the image, for example, if the image is bright portion more pixels, then the whole image looks relatively bright. Conversely, if the dark image portion pixels more, then the whole image looks relatively dark. For color images, the image having multiple tones. , The image can be finely adjusted by adjusting the hue of the different color channels.
In various image processing in the color model, the HSB color model of human perception, which describe the characteristics of the three basic colors.
Reprinted: http://nickandmiles.blog.163.com/blog/static/2342212320142724535318/