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G12 low light mode spots

Started Jun 3, 2021 | Questions
vass72 New Member • Posts: 6
G12 low light mode spots
1

Hi, i tried the low light mode (jpeg) of my canon g12 and for some reason i see some white and red spots. like pixels out of place.

I attach three different photos here that show the effect. In raw mode, i dont get any of these spots.

Any ideas?

PS please ignore the red marks on the floor...

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Canon PowerShot G12
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Sue Anne Rush
Sue Anne Rush Senior Member • Posts: 6,285
Re: G12 low light mode spots
2

Hello...

I see the white /red spots - just pp them out - IMHO 

vass72 wrote:

Hi, i tried the low light mode (jpeg) of my canon g12 and for some reason i see some white and red spots. like pixels out of place.

I attach three different photos here that show the effect. In raw mode, i dont get any of these spots.

Any ideas?

PS please ignore the red marks on the floor...

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Sue Anne Rush

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Enders Shadow
Enders Shadow Veteran Member • Posts: 3,604
Re: G12 low light mode spots
3

Those are hot or stuck pixels. They often appear with longer exposures and higher ISO values. They tend to increase over time.

Some cameras offer a function to help map out the worst pixels. And newer cameras often have a long exposure noise reduction option. This takes a dark frame of the same exposure duration and subtracts dark frame from the light frame. This can help minimize fixed pattern noise. But these aren't options with the G12.

I'm not sure why they don't appear in RAW files. Possibly your RAW developer app is filtering them out.

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Phil

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Miss tilly
Miss tilly Senior Member • Posts: 2,165
Re: G12 low light mode spots
1

Exactly, well explained.

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Regards,
Gary

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