also offers up some plugins to help make your photos look better and print cleaner. I'd noticed the effects and noise in much of my digital photos, but had no idea how to remove it -- until now.


http://rondayview.com/000002.php

Gosh... have I actually helped somebody?  That's one for the record books.      

Not at the moment - the module may cover it at a later date. But do post your questions and I'll ask some mates and maybe even email my lecturer! (He's a World Leader in Image Processing, Vision and graphics).

I'll see what I can do

DJ

Actually what i'm looking for info on is the inherent artefacts that occur with digital photography.  To be more specific ghost photography and things called orbs which are supposed to be the first stage of an apparition.  They have only really appeared since the advent of digital ccd photography and are particularly prevalent in the 2-3 megapixel range of camera.  These orbs generally appear as small whiteish vaguely circular objects in photos, sometimes they appear to have surface markings.

What i'm looking for is any info on known conditions that may cause this to happen, maybe a
characteristic flaw in the way ccd's work

Any info much appreciated, and i'll throw in a freebie bottle of ectoplasm.    

Summary:

It's because cameras have got smaller. Now the flash unit is nearer the lens and as a result any small dust particles, dandruff, condensation etc. near the lens are shown up by the flash.

To make your very own orb picture:
1. go into a darkened room
2. shake a paper tissue / duster above the camera
3. take shot

You can keep the ectoplasm

Summary:

It's because cameras have got smaller. Now the flash unit is nearer the lens and as a result any small dust particles, dandruff, condensation etc. near the lens are shown up by the flash.

i know its quite easy to fake them but often there have been many  situations e.g. when no "orbs" have been picked up in a room for ages, suddenly a cold spot appears or a presence is felt and is verified by a laser thermometer a picture is taken and there's an orb there.  If dust was responsible you would expect to get more of these events than actually occurs.
I was looking more for an explanation in which the CCD produces artefacts in certain conditions.  If you can eliminate that you might have a spook.