C1 B+W pics, still contains coulour informations ???

[Guest Olof]

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The following pictures have all been converted into B/W with C1. After that i upload them at Flickr. Some pictures are still B/W other coloured. How can that be ?

 

[jaapv]

I generally run my conversions through PSE to sharpen, crop and resize and I routinely remove colour information as well there.

[Jamie Roberts]

The following pictures have all been converted into B/W with C1. After that i upload them at Flickr. Some pictures are still B/W other coloured. How can that be ?

 

Olofsborg's latest photos slideshow on Flickr

 

 

All I can say is that C1 uses the colour profile that's active when you drop them in the process queue, and doesn't care what you do after that. The thumbnail state means nothing to the processor.

 

IOW, the file is exactly the way you've set it to be (exposure, white balance, focus, profile, and so on) when you add it to the process queue. If you go back and change something, the file in the queue will ignore your changes. You need to add it again to the queue for the changes to be picked up.

 

So, if you want *all* BW shots, first select the BW profile (C1s or JFIs or however you're doing) *then* work on the shots and finally add them all to the process queue at the same time. Voila--all black and whites.

 

BTW--the great thing about the way C1 works is that you can quickly do a colour then a BW just by changing the profile and adding the files when the profile was active. C1 handles the file re-name and just gets on with processing.

[Piers]

The following pictures have all been converted into B/W with C1. After that i upload them at Flickr. Some pictures are still B/W other coloured. How can that be ?

 

 

The C1 LE exports the images as rgb files even if you have completely desaturated the image, or substituded a bw profile for the leca M 8 generic; I have found that some more exaggerated adjustments can fool the desaturation into allowing some colour information through--i.e. the r,g and b channels do not all read the same numerical value: you need to convert to grayscale in e.g. Photoshop for a true monochrome image.

 

But then if you routinely save images as srgb jpegs, for web or print, you are reconverting back to a rgb colour space again.

 

Best,

[Piers]

Yes, I looked at the exif data on one of the shots from your webspace, Olof and it says profile: phase one bw, colour mode: rgb, so to get a true monochrome--for example to carry out further PP enhancements, without introducing any colour artefacts--you do need to convert the exported file to "grayscale".

 

Then, if you want, you can apply subtle duo tones/tri tones etc, then reconvert to srgb or other RGB colourspace for web/print.

 

Best,