[Leica] IMG: Moonrise from the Space Needle

[Douglas Sharp]

Colour gamut in jpg against RAW, colour space conversion?

Did you try outputting in .tif format?

Douglas

On 10.02.2015 11:38, Peter Klein wrote:
> Another clue:  I just looked at several of the pictures on the camera's LCD
> screen.  Even blown up to 14x, the tail lights are still red.
>
> On Tue, Feb 10, 2015 at 2:33 AM, Douglas Sharp <douglas.sharp at gmx.de> wrote:
>
>> Hi Peter,
>>
>> looks like blown highlights to me.
>>
>> It's possible that the lights that are particularly bright are those of
>> cars braking (or maybe halogen bulbs that screw up the white balance)
>>
>> Cheers
>> Douglas
>>
>>
>> On 10.02.2015 11:19, Peter Klein wrote:
>>
>>> We were treated to quite a show during our anniversary dinner.
>>> <https://www.flickr.com/photos/24844563@N04/16304267069/>
>>>
>>> I'd like some advice on a technical problem with this picture, and in fact
>>> with all of the pictures I took of the city from atop the Needle.  Red car
>>> tail lights turn white.  It isn't overexposure, because it happens even on
>>> shots that I deliberately underexposed drastically, where all the RGB
>>> values are under 255. In shots with any decent city detail, the red
>>> channel
>>> does hit 255, but the green and blue are much lower.  Lowering the
>>> exposure
>>> in post, or using highlight recovery has no effect.
>>>
>>> This doesn't happen with larger areas of red light where the pixels have
>>> the same values as the little tail lights. But taill lights turn white, as
>>> do other points of colored light like the blue and green Seahawks colors
>>> that still adorn some construction cranes. The key seems to be that the
>>> light sources are just a few pixels in diameter.
>>>
>>> Maddeningly, on the onscreen preview, the tail lights appear red. But when
>>> I "develop" the JPG, they turn white.They also turn white if I blow up the
>>> onscreen preview to 50% size or larger.
>>>
>>> The camera is an Olympus E-M5 with 45/1.8 lens, and the RAW developer is
>>> Capture One v. 7.1.2. Here's a screen clip of the whole picture, followed
>>> by a section with and a string of car rears blown up to 400% so you can
>>> see
>>> what's going on with the pixels.
>>> <
>>> http://gallery.leica-users.org/v/pklein/temp/
>>> SpaceNeedleMoonriseScrPreview.JPG.html
>>> <
>>> http://gallery.leica-users.org/v/pklein/temp/
>>> SpaceNeedleMoonriseCars400pct.JPG.html
>>> Advice, anyone? Is this just an inevitable result of the Bayer array, or
>>> is
>>> there a way to fix it?
>>>
>>> --Peter
>>>
>>> _______________________________________________
>>> Leica Users Group.
>>> See http://leica-users.org/mailman/listinfo/lug for more information
>>>
>>>
>>>
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> _______________________________________________
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>