Remasking a digitally subtracted image may be necessary due to noise artifacts, motion artifacts, and underexposure, all of which can degrade image quality.
Remasking a digitally subtracted image may be required due to several artifacts that can affect the quality of an image. These include: noise artifacts, motion artifacts, and underexposure. Noise artifacts can be caused by electronic interference or insufficient signal, leading to grainy images. Motion artifacts occur when there's movement by the subject or the imaging device, causing blurriness or streaking. Underexposure happens when too little light reaches the camera's sensor, resulting in images that are too dark or have very little visible detail. Adjustments may need to be made to the shutter speed, aperture, or ISO settings to correct for underexposure in digital imaging.