What are the gray values in digital cameras? Does the higher the gray scale mean that more colors can be displayed?

The gray value in a digital camera refers to the number of color values of each object when it is converted into rgb format. Gray scale refers to the classification of white and black according to logarithmic relationship, and the generated image is tested by a black-and-white gray scanner, usually displayed in gray scale. The higher the gray level, the brighter the color of the picture, the richer and more realistic it looks. Gray value-The gray value of each point on the black-and-white image means that the color and brightness of each scene are different, but the gray value of the black-and-white photo taken or the black-and-white image accepted by the TV is different. We can classify white and black as logarithmic relationship, which is divided into several levels, also called gray scale, usually from 0 to 255, with black as the lowest level and white as the highest point. Black-and-white photos, also known as black-and-white gray-scale images, are widely used in image recognition and medical fields.

Gray scale, which can also be regarded as color scale, refers to the classification from lowest to highest after the logarithmic relationship between white and black is divided into several parts, which is also called gray scale image. Outside the field of Chinese character images, black-and-white images with grayscale photos are usually called black-and-white photos, and some monochrome images are also grayscale images. Black-toned objects are used as reference colors, and bright tissues are explained by different saturations. After differentiation, they can be scanned and imaged by a gray scanner.

The higher the gray value, the more vivid and true the image color is. If the grayscale object is converted into rgb, it can be converted into a CMYK object according to its color value. In some edge images, the segmentation of gray discontinuity is also based on this principle. Under normal circumstances, in the process of taking pictures, the average gray level of most objects will remain around 18%, and the gray level is actually related to the brightness of pixels.

In the refresh bit memory cell corresponding to the pixel, the performance of the display itself can also be adjusted corresponding to the gray level. The higher the gray value, the larger the image display pixel of the display.

The gray scale value can be corrected, and the adjustment of the color gray scale value can be simply linearly adjusted by the power supply on the display. This power function relationship can be regarded as a correction. The normal value is 2.2, beyond which the gray scale that can be seen by human eyes will increase and the balance of the whole picture will be enlarged accordingly. When calculating this color value, you can't simply add it up, but you should adjust it after converting it through physical luminosity.

In short, black-and-white photos have a certain gray value, which can show different gray levels according to different colors and brightness. The division of gray scale is to distinguish white from black according to logarithmic relationship, and divide the image from 0 to 225. The higher the gray value, the brighter the adjusted color, and the more vivid the photos taken. When processing photos, you can adjust the color through correction to achieve the ideal effect.