A noise reduction process where a camera takes a second exposure of a black frame after the camera takes a long exposure image. The image noise is easily identified in the black frame shot and is then electronically removed from the actual image. This helps to reduce the amount of hot pixels that normally show up in long exposure shots from digital cameras.allthingsphotography
Optical and chemical changes in the eye which, over a period of about 20 minutes, enable people to see in the dark. It makes Exposure judgments by eye doubly difficult when light levels change. Tip: at such times, color perception is minimal or non-existent.
period of the Middle Ages from c.5th century CE to 10th century, considered a phase in which philosophy and the arts were ignored or actively hindered.
One way to focus attention on the subject is to use a dark background, especially with backlit and Translucent subjects.
Pixels collect signal charges in the absence of light over time, which can vary from pixel to pixel. The result is known as dark current, or more commonly, noise.
The charge accumulated by pixels while not exposed to light. Normally, this charge is reduced or eliminated prior to capturing a picture