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webcam colours

  • albertw
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20 years 6 months ago #1689 by albertw
webcam colours was created by albertw
Hi all,

Hope that the Christmas festivities are progressing well for you. Since the telly is rubbish I'm back at the computer with the remains of a bottle of wine and making a start on the turkey snadwiches!

I did manage to get the webcam working with linux, and when I've got it all in a coherent manner I'll post a howto if anyone else is interested.

While testing I was just using the webcam as a webcam, and noticed that the colours it was detecting were very strange. Have a look at this:



The image on the left is from a canong3 camera, the right a ToUcampro. The coulours are just plain wrong on the webcam and no messing with the settings seems to be able to produce anything even close to correct.

I have tried this in daylight and the results are a bit better, but my black tshirt still appears as a light blue.

The really curious thing is that it seems to be dependant on texture, the loudspeaker is all black as you can see from the camera image, but the webcam seems to detect the cloth on the speaker as blue!

Any thoughts on what is happening or solutions would be appreciated.

Happy new year!

Cheers,
~Al

Albert White MSc FRAS
Chairperson, International Dark Sky Association - Irish Section
www.darksky.ie/

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20 years 6 months ago #1691 by
Replied by on topic Re: webcam colours
Dear Al,
Merry Christmas , I know sod all about webcams but I agree that the T.V. is bloddy desperate,so try uk Gold-they're repeating the Two Ronnies.Now they were funny!

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20 years 6 months ago #1692 by dave_lillis
Replied by dave_lillis on topic Re: webcam colours
Hi,
Before I read the test, I thought the one on the right was the good one and the one on the left was the webcam, I didnt notice anything as severe as that with the my toucampro, I'll have a go at trying to reproduce what you got,

Dave L. on facebook , See my images in flickr
Chairman. Shannonside Astronomy Club (Limerick)

Carrying around my 20" obsession is going to kill me,
but what a way to go. :)
+ 12"LX200, MK67, Meade2045, 4"refractor

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20 years 6 months ago #1696 by spculleton
Replied by spculleton on topic Re: webcam colours
Okay, so you've got the remains of a bottle of wine, you're seeing funny colours and you're eating QUOTE turkey sNadwiches !!! That's some tiny remains of a bottle of wine.

Shane Culleton.

Dozo Yoroshiku Onegai Shimasu

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20 years 6 months ago #1701 by astroguy
Replied by astroguy on topic Re: webcam colours
Albert I think you might ahev an examplary colour problem with your toucam. This is certainly not what I get. You might like to borrow another one for comparison?


regards

Jouke


Hi all,

Hope that the Christmas festivities are progressing well for you. Since the telly is rubbish I'm back at the computer with the remains of a bottle of wine and making a start on the turkey snadwiches!

I did manage to get the webcam working with linux, and when I've got it all in a coherent manner I'll post a howto if anyone else is interested.

While testing I was just using the webcam as a webcam, and noticed that the colours it was detecting were very strange. Have a look at this:



The image on the left is from a canong3 camera, the right a ToUcampro. The coulours are just plain wrong on the webcam and no messing with the settings seems to be able to produce anything even close to correct.

I have tried this in daylight and the results are a bit better, but my black tshirt still appears as a light blue.

The really curious thing is that it seems to be dependant on texture, the loudspeaker is all black as you can see from the camera image, but the webcam seems to detect the cloth on the speaker as blue!

Any thoughts on what is happening or solutions would be appreciated.

Happy new year!

Cheers,
~Al


LX 200 GPS, Williams optics 80mm APO, Meade LPI, Canon 300D, Skymap pro, Lunar phase pro, Image plus, Exploradome.

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20 years 6 months ago #1725 by dave_lillis
Replied by dave_lillis on topic Re: webcam colours
Hi Albert,
I cant reproduce what you have there by just changing the illumination of the scene, there is either something wrong with the camera or maybe there is some setting set incorrectly ???

Dave L. on facebook , See my images in flickr
Chairman. Shannonside Astronomy Club (Limerick)

Carrying around my 20" obsession is going to kill me,
but what a way to go. :)
+ 12"LX200, MK67, Meade2045, 4"refractor

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