Errant pixels

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How many users are having this problem?

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I understand hot pixels to be bright points I'm a relatively dark photo.
Would dark spots in your photos be AKA dead pixels?
There seem to be several Git 2 users with errant pixels!
 
Pier28 said:
There is a new sensor calibration option that should fix hot pixels. (special maintenance mode)
Click to expand...
I have been reading of that maintenance mode, but should a buyer have to work on and/or program a new device?
 
It's pretty straight forward. The calibration at the factory is not always perfect unfortunately due to environmental factors, temperature differences and if it was fully warmed up yet etc.
 
Optimal ppl shouldent have to do this calibration, but with the product and the price for it in mind i would not mind having to do so.

Then again i am technical minded so for the most things like this is no problem to me, but some / many ppl might not be the same and so they will have a hard time dooing so and undestanding it might be needed.

To be on the safe side i think gitup should provide a video that will guide inexperienced ppl thru the process, this should allso help ppl with poor english skills.
 
kamkar1 said:
Optimal ppl shouldent have to do this calibration, but with the product and the price for it in mind i would not mind having to do so.

Then again i am technical minded so for the most things like this is no problem to me, but some / many ppl might not be the same and so they will have a hard time dooing so and undestanding it might be needed.

To be on the safe side i think gitup should provide a video that will guide inexperienced ppl thru the process, this should allso help ppl with poor english skills.
Click to expand...
Thanks for the reply. Techtronic9000 has such a video, but I found his presentation hard to follow. He uses what looks like a focus chart, but I couldn't follow the flow of the presentation
 
I think that video is just for focussing the camera, but offcourse this can be needed once in a while, even for expensive gopro cameras.

For calibrating camera sensor you need to have the camera aimed at a white background ( usioally at the factories they use a light box with a certain kelvin light source )
For calibrating the erly V1 SG9665GC dashcams we used a white screen on phone or tablet ( white ) and then lens blocked for the all black part of the setup.

what you do in that calibration is teach the sensor what is all white and what is all black, when it know that it should be able to figure out itself anything in between.

Not sure if the sensor calibration for the GIT2 camera is the same but i kinda suspect so.
 
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kamkar1 said:
I think that video is just for focussing the camera, but offcourse this can be needed once in a while, even for expensive gopro cameras.

For calibrating camera sensor you need to have the camera aimed at a white background ( usioally at the factories they use a light box with a certain kelvin light source )
For calibrating the erly V1 SG9665GC dashcams we used a white screen on phone or tablet ( white ) and then lens blocked for the all black part of the setup.

Not sure if the calibration for the GIT2 camera is the same but i kinda suspect so.
Click to expand...
Yes, K. It is the sixth video on his youtube channel.
Mike
 
Pier28 said:
It's pretty straight forward. The calibration at the factory is not always perfect unfortunately due to environmental factors, temperature differences and if it was fully warmed up yet etc.
Click to expand...

I saw watching Tech Tronic9000's hot pixel video that there is an SPI calibration menu for bright and dark pixels.
I feel better about this cam
Is this calibration something like auto white balance?
 
A 5100K light box is how it's done

cb4624079edbffa368b333a7c77fde23.jpg


Using this image via smartphone should work.
(Full brightness turn off all filters)

https://www.dropbox.com/s/im0c1fuvwzjioxu/1920 x 1080 WHITE IMAGE.jpg?dl=1
 
kamkar1 said:
I think that video is just for focussing the camera, but offcourse this can be needed once in a while, even for expensive gopro cameras.

For calibrating camera sensor you need to have the camera aimed at a white background ( usioally at the factories they use a light box with a certain kelvin light source )
For calibrating the erly V1 SG9665GC dashcams we used a white screen on phone or tablet ( white ) and then lens blocked for the all black part of the setup.

what you do in that calibration is teach the sensor what is all white and what is all black, when it know that it should be able to figure out itself anything in between.

Not sure if the sensor calibration for the GIT2 camera is the same but i kinda suspect so.
Click to expand...
The procedure to calibrate bright and dark pixels is clear on the Dropbox zip file
 
TwoBlues said:
So whereas TechTronics9000 video relies on the cam being aimed at his white sheet of paper illuminated by his high intensity lamp, I should be able to place the Git 2 lens on the white image on my tablet?
Click to expand...
The white pixels on a tablet are normally made up from a mixture of red, green and blue pixels - try looking at it with a magnifying glass. If you are not careful then the camera may not be seeing white on all the pixels! Since the camera has 16MP resolution and the tablet probably only 2MP it should be easy for the camera to see the individual red, green and blue plus the black gaps between them, however they will probably be very out of focus and thus somewhat mixed.

If you are going to use the tablet then I suggest you leave the translucent lens cap on the Git2 to diffuse the light so that it only sees the light as white. Probably a good idea if using sunlight on, or through white paper too.
 
Yeah use the white pice of "paper" pier28 link to, i used it on my 7"tablet with the cracked screen at full brightness.
Dont really need a large screen for this as the lens is right up against the tablet/phone screen, for the black part we just ( on the SG9665GC dashcam ) had the lens pressed against the table or as i did my black mouse mat, main thing here is to only have all blackness in the footage so any way that will leave 0 light for the sensor should be allright for the black part of the calibration.

Dunno if there is any glass on the git2 lens thats more forward than other parts of the lens, on the SG9665GC lens the glass is recessed a little so no problem having that flush against a flat surface blocking all light out.
 
Nigel said:
The white pixels on a tablet are normally made up from a mixture of red, green and blue pixels - try looking at it with a magnifying glass. If you are not careful then the camera may not be seeing white on all the pixels! Since the camera has 16MP resolution and the tablet probably only 2MP it should be easy for the camera to see the individual red, green and blue plus the black gaps between them, however they will probably be very out of focus and thus somewhat mixed.

If you are going to use the tablet then I suggest you leave the translucent lens cap on the Git2 to diffuse the light so that it only sees the light as white. Probably a good idea if using sunlight on, or through white paper too.
Click to expand...
Sounds like I should stick with TechTronics9000's method but I think halogen lamp?
 
kamkar1 said:
Yeah use the white pice of "paper" pier28 link to, i used it on my 7"tablet with the cracked screen at full brightness.
Dont really need a large screen for this as the lens is right up against the tablet/phone screen, for the black part we just ( on the SG9665GC dashcam ) had the lens pressed against the table or as i did my black mouse mat, main thing here is to only have all blackness in the footage so any way that will leave 0 light for the sensor should be allright for the black part of the calibration.

Dunno if there is any glass on the git2 lens thats more forward than other parts of the lens, on the SG9665GC lens the glass is recessed a little so no problem having that flush against a flat surface blocking all light out.
Click to expand...
I think the white paper, bright light, and carefully holding the cam to prevent a shadow seems best.
 
I tried that too with the SG9665GC first, backlighting a white paper with my powerfull 85W HID torch.
All i got out of that was allmost frying my retinas and setting my apartment on fire 😀 a 85W HID torch is a serious bit of kit, will set flameable things on fire if it get close enuff to them for a while.
Found the bright tablet screen so much better to work with.

But if the result is not good enuff you can allways repeat it, its not like you destroy anything.
 
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