Chroma Adjust for Black and White at DVinfo.net

Gary Armor · March 30th, 2003, 04:26 PM

Hi- have a PD150 and wish to shoot in black and white and/or desaturated color. Where can I find info on adjusting chroma and luma for this camera?

Mike Rehmus · March 30th, 2003, 09:22 PM

I have not tried to kill the color in-camera since it is so easy to do in Post and I always have the option of using color.

Gary Armor · March 31st, 2003, 12:46 AM

Thanks Mike, I will look into a test on FCP. However, my thought was a clearer image might be attained if the ccd only has to record grayscale rather than color bits, but perhaps I am wrong about this. What do you think? Seemed like I read that the VX1000 had some menus for adjusting chrominance and luminance, but don't seem to be available on the PD150.

Robert Bobson · March 31st, 2003, 06:17 AM

If you're shooting in color, but going to remove chroma in post, does it make sense to shoot with an amber filter? Will this make clouds more dramatic, and get rid of haze?

Any one tried this?

thanks

Bob

Mike Rehmus · March 31st, 2003, 10:26 AM

The color to B&W conversion would be accomplished in the camera electronics. Color detection in a CCD detector is always created with the use of color filters which are permanent parts of the optical block.

I think one would have to play around with filters to see if the CCD pixel triads would react to color filters in the same manner as Panchromatic Silver Halide film.

Haze as recorded on film is the reaction of the film to backscattering of UV. CCD response is way down with regard to UV so I'm guessing it would not be as effected by the type of haze that affects film. IIRC, the more dramatic clouds are really created by darkening the 'blue' sky. A polarizer would do as well.

March 30th, 2003, 04:26 PM	#1
Gary Armor Tourist Join Date: Mar 2003 Location: Sausalito, CA Posts: 2	Chroma Adjust for Black and White Hi- have a PD150 and wish to shoot in black and white and/or desaturated color. Where can I find info on adjusting chroma and luma for this camera?

March 30th, 2003, 09:22 PM	#2
Mike Rehmus Wrangler Join Date: May 2002 Location: Vallejo, California Posts: 4,049	I have not tried to kill the color in-camera since it is so easy to do in Post and I always have the option of using color. __________________ Mike Rehmus Hey, I can see the carrot at the end of the tunnel!

March 31st, 2003, 10:26 AM	#5
Mike Rehmus Wrangler Join Date: May 2002 Location: Vallejo, California Posts: 4,049	The color to B&W conversion would be accomplished in the camera electronics. Color detection in a CCD detector is always created with the use of color filters which are permanent parts of the optical block. I think one would have to play around with filters to see if the CCD pixel triads would react to color filters in the same manner as Panchromatic Silver Halide film. Haze as recorded on film is the reaction of the film to backscattering of UV. CCD response is way down with regard to UV so I'm guessing it would not be as effected by the type of haze that affects film. IIRC, the more dramatic clouds are really created by darkening the 'blue' sky. A polarizer would do as well. __________________ Mike Rehmus Hey, I can see the carrot at the end of the tunnel!

March 31st, 2003, 12:46 AM	#3
Gary Armor Tourist Join Date: Mar 2003 Location: Sausalito, CA Posts: 2	Thanks Mike, I will look into a test on FCP. However, my thought was a clearer image might be attained if the ccd only has to record grayscale rather than color bits, but perhaps I am wrong about this. What do you think? Seemed like I read that the VX1000 had some menus for adjusting chrominance and luminance, but don't seem to be available on the PD150.

March 31st, 2003, 06:17 AM	#4
Robert Bobson Major Player Join Date: Feb 2003 Location: Bay City, Michigan Posts: 585	If you're shooting in color, but going to remove chroma in post, does it make sense to shoot with an amber filter? Will this make clouds more dramatic, and get rid of haze? Any one tried this? thanks Bob