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Mike O'Keeffe
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Colour - Saturation as an Image Artefact
In a summary  HERE  I described an artefact as the distortion of an image.  There are various environmental, optical and processing parameters which bend and distort the properties of an image in different ways. I was recently given an interesting puzzle by...
Colour - Saturation as an Image Artefact
Colour - Saturation as an Image Artefact
birdingimagequalitytool.blogspot.ie
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Colour - A Bird In The Hand
I was recently asked if it there might be software available that would restore perfect white balance to jpegs of birds captured in the hand.  I am not aware of any software guaranteed to do this accurately every time.  If there was, camera's would surely a...
Colour - A Bird In The Hand
Colour - A Bird In The Hand
birdingimagequalitytool.blogspot.ie
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Birds and Light - Polarization
General Principles While I have researched and written about lots of complex aspects in the realm of light, up until now I have avoided one of it's fundamental characteristics, namely Polarization .  Light exhibits characteristic of both particles and waves...
Birds and Light - Polarization
Birds and Light - Polarization
birdingimagequalitytool.blogspot.ie
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Colour - Plumage Morphing
In this Birding Frontier's posting the late, and sadly missed Martin Garner  describes a phenomenon often attributed to Siberian Chiffchaff ( Phylloscopus collybita tristis ), referred to as colour morphing.  Clearly plumage itself doesn't have the ability ...
Colour - Plumage Morphing
Colour - Plumage Morphing
birdingimagequalitytool.blogspot.ie
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Colour - Plumage Morphing
In this Birding Frontier's posting the late, and sadly missed Martin Garner  describes a phenomenon often attributed to Siberian Chiffchaff ( Phylloscopus collybita tristis ), referred to as colour morphing.  Clearly plumage itself doesn't have the ability ...
Colour - Plumage Morphing
Colour - Plumage Morphing
birdingimagequalitytool.blogspot.ie
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Birds and Light - Ghosts
In the spirit of the season I recently had a close encounter with a ghost.  A very washed out Western Bonelli's Warbler Phylloscopus bonelli on Cape Clear Island, Co. Cork last weekend got many pulses racing when the finder reported it called just like it's...
Birds and Light - Ghosts
Birds and Light - Ghosts
birdingimagequalitytool.blogspot.ie
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Field Marks - Grey Scales and Gulls (Part 5)
In this series of postings I have been concerned with trying to replicate the famous (among gull enthusiasts)  Kodak Grey Scale  in sRGB colour space.  The intention has been to try and directly measure gull upper-wing and mantle tones from digital images, ...
Field Marks - Grey Scales and Gulls (Part 5)
Field Marks - Grey Scales and Gulls (Part 5)
birdingimagequalitytool.blogspot.ie
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Colour - Pros and Cons of Boosting Saturation
As a young boy I can remember being told that white light can be scattered by a prism into all the colours of the rainbow.  Like most kids, I found that an incomprehensible concept.  For a child, used to subtractive mixing of coloured paints, the additive m...
Colour - Pros and Cons of Boosting Saturation
Colour - Pros and Cons of Boosting Saturation
birdingimagequalitytool.blogspot.ie
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Field Marks - Grey Scales and Gulls (Part 4)
This apparent Kamchatka Gull ( Larus canus kamtschatschensis ), rear right was photographed by David O'Connor in Co. Kerry, Ireland on 6th March, 2014.  Recent developments in the identification of the Larus canus complex, thanks to extensive studies by Pet...
Field Marks - Grey Scales and Gulls (Part 4)
Field Marks - Grey Scales and Gulls (Part 4)
birdingimagequalitytool.blogspot.ie
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