Auflösungsartefakten

Auflösungsartefakte, also known as artifacts of resolution, are visual anomalies that appear in digital images or videos due to limitations in the sampling, compression, or transmission processes. These artifacts can significantly degrade the quality of the visual content and are often noticeable as unwanted patterns or distortions.

One common type of Auflösungsartefakte is blocking or tiling, which occurs when an image is compressed using a block-based compression algorithm, such as JPEG. In this case, the image is divided into small blocks, and each block is compressed independently. If the compression ratio is too high, the boundaries between the blocks become visible, resulting in a blocky or tiled appearance.

Another type of Auflösungsartefakte is ringing or Gibbs phenomenon, which appears as a series of oscillations or ripples around sharp edges in an image. This artifact is often caused by the use of a low-pass filter during the compression process, which can introduce high-frequency components that are not present in the original image.

Moire patterns are another form of Auflösungsartefakte, which can occur when two periodic patterns, such as a grid or a halftone screen, are overlaid or when an image is displayed on a screen with a different resolution than the original. In this case, the interference between the two patterns can result in a moiré pattern, which appears as a series of wavy or zigzag lines.

Finally, color bleeding or fringing is a type of Auflösungsartefakte that can occur when an image is compressed using a chroma subsampling technique, such as 4:2:0 or 4:2:2. In this case, the color information is sampled at a lower resolution than the luminance information, which can result in color artifacts, such as color bleeding or fringing, around sharp edges in the image.

Auflösungsartefakte can be minimized or eliminated by using higher-quality compression algorithms, increasing the resolution of the image or video, or using more advanced display technologies. However, in many cases, these artifacts are an inevitable consequence of the trade-offs between image quality, file size, and transmission bandwidth.