Black Level Compensation is a technique used in image processing that is applied for accurate representation of black in digital images or videos. The black level is the minimum brightness level that the signal represents, and is a pixel value that represents black.

Black level correction is mainly used to compensate for variations or unevenness in black levels that occur in image sensors or digital cameras. This is important to maintain accurate color and contrast in the image.

Black levels may vary depending on the imaging equipment or environment, and these black level variations must be corrected to accurately represent black in digital images or videos. In the calibration process, a dark and constant pixel value based on the black level is set to accurately represent the black color of the image, and the brightness values are adjusted based on this.

Black level calibration is performed primarily in image processing pipelines and can be implemented in software or hardware. This improves the contrast between contrast and contrast of the image, and improves the quality of the image by preserving the details of the black area. In addition, black-level correction, combined with other image processing techniques, can also be applied to various image quality improvement techniques such as color correction, contrast adjustment, white balance, etc.