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Stuck/hot pixels... any cure?

Discussion in 'Photography & Video' started by The_blue, 11 Oct 2009.

  1. The_blue

    Mobster

    Joined: 25 Oct 2002

    Posts: 4,186

    Location: Derbyshire

    I've been taking a few light trails over the motorway and i've noticed a few red pixels and 1 blue popping up after 15 seconds, about 4 in total

    Can these be mapped out some way or am i stuck with PSing them out?


    Camera is my aging 300D - sure it never used to do this :confused:
     
  2. Derek W

    Capodecina

    Joined: 1 Oct 2008

    Posts: 11,565

    Location: Glebe Park

    Someone had a similar thread to this a few months ago but I forget the user or title I'm afraid. I had a look and couldn't see it either.

    they were using a 300D or 350D as well from memory. I think its because the camera doesn't have a long exposure noise reduction function so these hot spots will start appearing. the longer the exposure the more will appear.
     
  3. V-Spec

    Mobster

    Joined: 8 Jun 2005

    Posts: 3,698

    Location: London

    Nearly all digital cameras have hot pixels during a long exposure, all my Canon's used to do it and there is no cure, other than PSing them out, or using some sort of software to remember their location and automatically clone them out for you.
     
  4. The_blue

    Mobster

    Joined: 25 Oct 2002

    Posts: 4,186

    Location: Derbyshire

    Any macros for PS to do this?
     
  5. rpstewart

    Man of Honour

    Joined: 11 Mar 2003

    Posts: 10,744

    Location: Greenock, Scotland

    You'll need to write your own action because your hot pixels will be in a different place to everyone elses.

    Take a long exposure of the inside of the lens cap, open it up in PS then record an action while you clone out all the hot spots. Save the action and you're done.
     
  6. Nutster

    Associate

    Joined: 11 Jan 2006

    Posts: 53

    Location: UK

    Lightroom removes hot pixels from your images automatically.
     
  7. The_blue

    Mobster

    Joined: 25 Oct 2002

    Posts: 4,186

    Location: Derbyshire

    Cool :)

    Don't spose you've seen a step by step for a n00b?