Dark-frame subtraction
id:
dark-frame-subtraction-311-12468285
title:
Dark-frame subtraction
text:
In digital photography, dark-frame subtraction is a way to reduce image noise in photographs shot with long exposure times, at high ISO sensitivity or at high temperatures. It takes advantage of two components of image noise that remain the same from one shot to the next, dark current and fixed-pattern noise. Noise from the image sensor include hot pixels, which light up more brightly than surrounding pixels. The technique works by taking a picture with the shutter closed and subtracting that el
brand slug:
wiki
category slug:
encyclopedia
description:
Method of reducing image noise in long-exposure photographs
original url:
https://en.wikipedia.org/wiki/Dark-frame_subtraction
date created:
date modified:
2023-08-02T07:04:26Z
main entity:
{"identifier":"Q861103","url":"https://www.wikidata.org/entity/Q861103"}
image:
{"content_url":"https://upload.wikimedia.org/wikipedia/commons/c/c1/Dark_Frame.jpg","width":1028,"height":682}
fields total:
13
integrity:
15