Képpontértékek

Képpontértékek, often translated as pixel values, refer to the numerical representations of color and intensity within a digital image. Each pixel, the smallest addressable element in a raster image, is assigned one or more numerical values that determine its visual appearance. In grayscale images, a single value typically indicates the brightness of the pixel, with 0 usually representing black and the maximum value, often 255 in an 8-bit system, representing white. Intermediate values represent varying shades of gray.

For color images, multiple values are used per pixel to define its color. Common color models include RGB (Red, Green, Blue), where each pixel has three values corresponding to the intensity of red, green, and blue light components. Other models like CMYK (Cyan, Magenta, Yellow, Key/Black) are used in printing, and HSL/HSV (Hue, Saturation, Lightness/Value) represent color based on its shade, intensity, and brightness. The range of these values depends on the bit depth of the image, with higher bit depths allowing for a greater number of possible values and thus a wider color spectrum and smoother transitions. Understanding képpontértékek is fundamental to image processing, manipulation, and analysis.