|
|||||||||
|
Thread Tools | Search this Thread |
March 25th, 2009, 03:26 PM | #136 |
Major Player
Join Date: Dec 2006
Location: Los Angeles, CA
Posts: 959
|
Why don't you guys just connect your A1 to a calibrated monitor and make adjustments to the preset (-blue and/or +red, etc). Some experience this slight blue cast (me included) and some don't. Like I said, I did... and corrected it with adjustments.
|
March 25th, 2009, 03:39 PM | #137 |
New Boot
Join Date: Jan 2009
Location: Poland
Posts: 24
|
I haven't one but I'll try to do it with my Samsung SyncMaster 957DF. Certain difficultness is multitude of adjustments such as RG Gain, GR Gain etc. Did you noticed blacks are black and whites are blue in my shots?
|
March 25th, 2009, 03:51 PM | #138 |
Major Player
Join Date: Nov 2008
Location: Elgin, IL
Posts: 249
|
Bill,
Do you mind sharing your adjusted settings? Thanks in advance. |
September 10th, 2009, 08:26 AM | #139 | |
Major Player
Join Date: Mar 2007
Location: Salem, Oregon
Posts: 435
|
Quote:
Danged if I couldn't get rid of what looked like a blue cast in the whites, looking, for instance, at a sheet of paper with my naked eye and through the LCD viewfinder simultaneously. I white balanced probably a dozen times: same result. In fact, the entire picture looked a bit cold no matter what I did, suggesting that my various attempts to white balance were "correct", and at least invariable. For grins I clicked over to auto-WB and the image warmed immediately and slightly to remove the blue cast, yielding whites that really looked white and an image that didn't seem warm but just right. What gives? Why couldn't I attain the same pleasing image with an accurate manual white balance? If it weren't for this troubling (to me) aspect of TRUCOLOR and my apparent inability to compensate for it, I would use the present as my default. Any ideas from folks who have experimented more? Steve |
|
September 10th, 2009, 08:46 AM | #140 |
Regular Crew
Join Date: Dec 2006
Location: Rock Hill, S.C.
Posts: 57
|
Steven,
When I tried this preset a while back, I got a same blue cast as well. I don't believe it's a white balance issue either. I have never seen anything specific on what settings can compensate for it. I would like for someone to post those as well. On a side note, do you think the colors on this preset look a bit saturated? |
September 10th, 2009, 09:00 AM | #141 | |
Major Player
Join Date: Mar 2007
Location: Salem, Oregon
Posts: 435
|
Quote:
WB'ing comes second nature to me now, and so I, too, suspect that I'm not WB'ing incorrectly. Unfortunately, I'm just a serious hobbyist with a high end LCD monitor, not a calibrated production monitor ($$). I suppose if I had the latter, I could find out just what tweaks in the camera would remove the slight blue cast. Since I don't, I revived the thread for my selfish purpose of finding out what might have worked for others similarly situated (frustrated). Steve |
|
September 10th, 2009, 10:48 AM | #142 |
New Boot
Join Date: Jan 2009
Location: Poland
Posts: 24
|
I changed RGB settings to 0,0,0 and something else. Now the white is exactly white. My version is below.
__________________
Good cam :-), poor english :-( |
September 10th, 2009, 10:58 AM | #143 | |
Major Player
Join Date: Mar 2007
Location: Salem, Oregon
Posts: 435
|
Quote:
Steve EDIT: I suppose your reply also would clarify for me what "RGB" is, if this does not refer to the three separate gain settings for R, G, and B, respectively. |
|
September 10th, 2009, 11:27 AM | #144 | |
Major Player
Join Date: Dec 2006
Location: Los Angeles, CA
Posts: 959
|
Quote:
GAM N KNE M BLK P PED -4 SET -1 SHP -1 HDF M (default) DHV 0 (default) COR 0 NR1 0 NR2 0 CMX N CGN 8 CPH 0 RGN -1 GGN -2 BGN -3 RGM 10 RBM -12 GRM 6 GBM 0 BRM 12 BGM -3 |
|
September 10th, 2009, 12:09 PM | #145 |
New Boot
Join Date: Jan 2009
Location: Poland
Posts: 24
|
Yes, RGB are separate channels of Red, Green, Blue.
Parameter Original value My value GAM Gamma N N KNE Knee M L BLK Black P S PED Pedestal -9 0 SET Setup -9 -4 SHP Sharpness -9 -4 HDF Hor.Detail M (default) M (default) DHV Detail HV Balance 0 (default) 0 (default) COR Coring 0 -2 NR1 Noise Reduction 1 0 0 NR2 Noise Reduction 2 0 0 CMX Color Matrix N N CGN Color Gain 0 0 CPH Color Phase 0 0 RGN Red Gain -7 0 GGN Green Gain 3 0 BGN Blue Gain 12 0 RGM Red Green Matrix 40 40 RBM Red Blue Matrix -12 -12 GRM Green Red Matrix 6 6 GBM Green Blue Matrix 0 0 BRM Blue Red Matrix 12 12 BGM Blue Green Matrix -3 -3
__________________
Good cam :-), poor english :-( |
September 10th, 2009, 12:18 PM | #146 |
Major Player
Join Date: Mar 2007
Location: Salem, Oregon
Posts: 435
|
Bill, Artur:
Many thanks for the quick replies. I'm going to give these revised TRUCOLOR settings a try this evening. Artur, your earlier posts of pictures showing white paper illuminated by a desk lamp under various WB settings looked exactly like my results from last night. Thus, I'm encouraged that a solution is in sight! Steve |
September 10th, 2009, 08:39 PM | #147 |
Major Player
Join Date: Mar 2007
Location: Salem, Oregon
Posts: 435
|
Comparison of Original TruColor with Bill's and Artur's Variations
After testing this evening, it is evident that both Bill's and Artur's variations of the TruColor preset definitively get rid of the blue cast that I observe with the original TruColor preset. I conducted three tests following the procedure below each time I changed values in the TruColor preset.
Test: 1. Selected one of the variations for the preset.Results: 1. Original TruColor is most definitely blue. Subjectively and objectively (RGB) this is clearly the case.As you can see, the tests were under artificial (halogen) lighting. I'd like to try out the variations outdoors in daylight, where I tend to shoot the most footage. For now, I really like Bill's version. My thanks to both gentlemen for posting their efforts. Steve |
September 11th, 2009, 05:00 AM | #148 |
New Boot
Join Date: Jan 2009
Location: Poland
Posts: 24
|
Thank you for comparison, Steve. I can see my settings give some reddish cast opposite to Bill's. I will try his preset in tungsten and daylight. I use my TC's version indoor only. At this reason I raised PED and SET to get more details of blacks. I left RG, GR, BG etc. the same of Paolo Ciccone. I lowered KNE at L to avoid overexpose the whites.
__________________
Good cam :-), poor english :-( |
September 11th, 2009, 07:23 AM | #149 |
Major Player
Join Date: May 2007
Location: Bethesda, MD
Posts: 404
|
Very useful
I like Bill's too.
I had noticed the blue cast in the original setting and thought to just work it out in post, but Bill's much better. I 'm wondering what the original poster thinks about this? L. |
September 11th, 2009, 08:01 AM | #150 | |
Major Player
Join Date: Mar 2007
Location: Salem, Oregon
Posts: 435
|
Quote:
It is plain from the previous many pages of this thread that the OP was quite active and was adamant that TruColor gave no blue cast whatsoever. I got the feeling the OP felt that to the extent that a blue cast does exist on a given camera, however, then perhaps that camera needs calibration. His blog indicates that he does not have an A1, suggesting that this project was a one-off not to be visited again. Still, like you, I'd be interested in reading his thoughts. Steve |
|
| ||||||
|
Thread Tools | Search this Thread |
|