Pixelintensität

Pixelintensität refers to the brightness or color value of an individual pixel within a digital image. Each pixel in a digital image is represented by a specific number or set of numbers that determine its appearance. For grayscale images, a single value typically represents the intensity, with 0 often indicating black and the maximum value (e.g., 255 for an 8-bit image) representing white. Intermediate values correspond to shades of gray.

In color images, pixelintensität is usually represented by multiple values. The most common color model is RGB (Red, Green, Blue), where each pixel has three values corresponding to the intensity of red, green, and blue light. These values are combined to create a wide spectrum of colors. Other color models like HSV (Hue, Saturation, Value) or CMYK (Cyan, Magenta, Yellow, Key/Black) also define pixelintensität, but in different ways.

The range of possible values for pixelintensität is determined by the bit depth of the image. An 8-bit image allows for 2^8 = 256 levels of intensity per color channel, while a 16-bit image offers 2^16 = 65,536 levels. Higher bit depths result in smoother transitions and more detail, particularly in areas with subtle variations in brightness or color. Analyzing and manipulating pixelintensität is fundamental to image processing techniques such as adjusting brightness, contrast, and color correction.