Brightness: means the number of light reflected from the object or image surface. Or the number of lights emitted from a light source. In practical applications, it has a close relationship with the visual effect of the picture. The brightness is also the most basic component or attribute. Sature (saturation): Color "concentration" in a picture. The lower the saturation, the more gray color is dark. The color of high saturation is very bright, and it is required to print or print with more ink. Contrast: The contrast ratio between the graphic bright colors and the shadow area. A picture of a very high contrast must include a large black and white or dark area of the contrast. There is almost no grayscale transition. A picture with a lower contrast, it seems to be a piece, and there is no special obvious theme (focus). Hue (Tone): A technical vocabulary that is defined for color types. For example, the red truck, green ball, etc., based on the specific location of the color in full chromatography. Image processing: emphasizes the conversion between images to improve the visual effect of the image. Image analysis: Mainly to detect and measure the targets of interest in the image to obtain their objective information to establish a description of the image. Image understanding: The focus is based on image analysis, further study the nature of the targets in the image and the interconnection between them, and derive the interpretation of the original imaging objective scene, thereby guiding and planning action.
