What describes how bright a pixel is and its color?

The concept that describes how bright a pixel is and its color is known as Pixel Value. Each pixel in a digital image has a specific value that determines its brightness and its color, which is usually represented in numerical form. This value defines the intensity of the color channels (typically red, green, and blue) mixed to create the final color seen in the image. Therefore, the Pixel Value is crucial in digital imaging as it directly influences the overall appearance of the image, affecting its brightness and color fidelity.

In imaging, Pixel Count refers to the total number of pixels in an image and does not directly indicate brightness or color. Color Depth refers to the number of bits used to represent the color of a pixel, which affects how many colors can be displayed, but it doesn't define the brightness of individual pixels. Image Quality is a broader term that encompasses various factors affecting how an image is perceived, including resolution, sharpness, and clarity, but again does not specifically address the brightness or color of individual pixels.