Unintentional B&W tint ...

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PcB - 20 Jan 2006 21:29 GMT

... what I mean is, I have a colour image which I have desaturated in
Elements. The image, however, appears to have a blue tint (which I am not
seeing elsewhere). I am working with a new display and have messed around
for two days now, updating drivers and tweaking gamma and colour settings. I
am starting to wonder if it's just my eyes, the new monitor or I missed
something in Elements and it really does have a blue tint.

Anyway, I would be really grateful if you would have a look at the image

http://static.flickr.com/33/87953538_cdaeda5d48_o.jpg

and let me know before I decide to take further action and return the
display or look for the superglue to re-apply my hair.

Cheers,
Paul

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Paul ============}
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// Live fast, die old //
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aussie bongo - 20 Jan 2006 21:54 GMT

> ... what I mean is, I have a colour image which I have desaturated in
> Elements. The image, however, appears to have a blue tint (which I am not
[quoted text clipped - 12 lines]
> Cheers,
> Paul

looks b/w to me :)

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Avery - 21 Jan 2006 00:24 GMT

>... what I mean is, I have a colour image which I have desaturated in
>Elements. The image, however, appears to have a blue tint (which I am not
[quoted text clipped - 12 lines]
>Cheers,
>Paul

If you desaturated it I would think the only blue tint would be coming
from a wrongly calibrated monitor.

It looks good on my screen.

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PcB - 21 Jan 2006 10:26 GMT

Thanks guys. I suspect the monitor is not calibrated properly but I've spent
two days trying to get it right. Maybe it is calibrated as far it will go
and now what I'm seeing is just the best the display can give me (it's a
TFT).

Paul

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Paul ============}
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// Live fast, die old //
Gallery at http://homepage.ntlworld.com/pcbradley/NewGallery2.htm

>
>>... what I mean is, I have a colour image which I have desaturated in
[quoted text clipped - 19 lines]
>
> It looks good on my screen.

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Avery - 21 Jan 2006 10:45 GMT

>Thanks guys. I suspect the monitor is not calibrated properly but I've spent
>two days trying to get it right. Maybe it is calibrated as far it will go
>and now what I'm seeing is just the best the display can give me (it's a
>TFT).
>
>Paul

I use a TFT monitor as well. Calibration without all the spiders etc.
is just hit and miss. Probably the best you can do is display this
pic. and adjust the blue out of it. Mine seems to be pretty good at
the moment but that is entirely by chance - I just kept playing around
till I got it.

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Marvin - 29 Jan 2006 20:07 GMT

> Thanks guys. I suspect the monitor is not calibrated properly but I've spent
> two days trying to get it right. Maybe it is calibrated as far it will go
> and now what I'm seeing is just the best the display can give me (it's a
> TFT).
>
> Paul

I copied and pasted the photo in Paint Shop Pro. The Properties tab there showed that it
is in rbg format, not gray scale.

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dj_nme - 30 Jan 2006 09:33 GMT

>> Thanks guys. I suspect the monitor is not calibrated properly but I've
>> spent two days trying to get it right. Maybe it is calibrated as far
[quoted text clipped - 5 lines]
> I copied and pasted the photo in Paint Shop Pro. The Properties tab
> there showed that it is in rbg format, not gray scale.

If the image was desaturated, then all three chanels (R, G & B) will be
identical.
Have another look.
Greyscale is not a good way to do digital B&W, because you only get an
8bit (256 shades) image, where-as desaturated colour has 24bits (16.7
million shades) per pixel.

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Marvin - 30 Jan 2006 16:56 GMT

>>> Thanks guys. I suspect the monitor is not calibrated properly but
>>> I've spent two days trying to get it right. Maybe it is calibrated as
[quoted text clipped - 12 lines]
> 8bit (256 shades) image, where-as desaturated colour has 24bits (16.7
> million shades) per pixel.

If you confuse the viewing software about the nature of the image, you will get effects
like an over-all tint.

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PcB - 30 Jan 2006 21:10 GMT

>>>> Thanks guys. I suspect the monitor is not calibrated properly but I've
>>>> spent two days trying to get it right. Maybe it is calibrated as far it
[quoted text clipped - 15 lines]
> If you confuse the viewing software about the nature of the image, you
> will get effects like an over-all tint.

It's definitely RGB not greyscale; I've always done it that way, initially
so that I could tint it back up again if I wanted to. Actually I did have
another thought, following-on from dj_nme's post, would colour spaces have
an effect here? If they are likely to have an effect then I'm going to need
a few more pointers.....

Paul

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Paul ============}
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// Live fast, die old //

Gallery at http://homepage.ntlworld.com/pcbradley/NewGallery2.htm
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dj_nme - 31 Jan 2006 08:49 GMT

>>>>>Thanks guys. I suspect the monitor is not calibrated properly but I've
>>>>>spent two days trying to get it right. Maybe it is calibrated as far it
[quoted text clipped - 23 lines]
>
> Paul

The possiblity that has been overlooked is that your software may not
use the monitor profile that has been set with Windows control panel or
the software that came with your monitor.
Have a careful look around your picture editing program and see if there
is any option to calibrate or set the profile of the monitor from within
the program.

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Rob Novak - 23 Jan 2006 14:22 GMT

>and let me know before I decide to take further action and return the
>display or look for the superglue to re-apply my hair.

Looks fine - neutral on my calibrated monitor.

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