I understand that the HQ (via h265 is 10bit...in either Log or HLG.

However, thing change when you switch to FOV (low resolution/quality)

Can you shoot 10bit in FOV?

Hi, Thanks for the inquiry. We will confirm this with our engineers for further clarification. Your patience is highly appreciated.

Wow, these answers all all wrong.

The FOV and HQ modes are for a downsampled 4K and true 4K readout, respectively. These have nothing to do with which color depth you use. 10-bit happens when you then select H.265 AND THEN selecting either the LOG or HLG color modes.


You’re shooting 8-bit in Normal Color, but can at least shoot 8-bit H.265 for the best clarity. You just can’t push the image as far in post without banding. But this is why you should shoot to as close to what you want your final image to look like unless you’re going artistic with it.

DRONE-flies-YOU! Posted at 2018-10-1 15:21
Wow, these answers all all wrong.

The FOV and HQ modes are for a downsampled 4K and true 4K readout, respectively. These have nothing to do with which color depth you use. 10-bit happens when you then select H.265 AND THEN selecting either the LOG or HLG color modes.

I still have not received a comment that says when you select FOV are you shooting in 8bit?

Or can you select FOV and then select log or hlg with 265 and then you shooting FOV 10bit color space?

Can someone (or DJI) make this clear distinctions?

Thanks.

geoffz Posted at 2018-10-1 15:51
I still have not received a comment that says when you select FOV are you shooting in 8bit?

Or can you select FOV and then select log or hlg with 265 and then you shooting FOV 10bit color space?

Hi. I was able to confirm this with our engineers. As long as the video set to DLOG-M and HLG mode, there will be record 10-bit video, not related to the resolution or quality. Yes, in DLOG-M and DLG, you can also get 10-bit video if the resolution is 4K FOV. Please let us know if you have other concerns. Thank you for the support.

DJI Tony Posted at 2018-10-2 08:32
Hi. I was able to confirm this with our engineers. As long as the video set to DLOG-M and HLG mode, there will be record 10-bit video, not related to the resolution or quality. Yes, in DLOG-M and DLG, you can also get 10-bit video if the resolution is 4K FOV. Please let us know if you have other concerns. Thank you for the support.

Thanks Tony.

So why if you can record FOV 10bit...why is the image quality less good in FOV...compared to HQ?

geoffz Posted at 2018-10-2 12:50
Thanks Tony.

So why if you can record FOV 10bit...why is the image quality less good in FOV...compared to HQ?

This question was already answered above!

In FOV mode, it takes the image from the whole sensor (5.5k) and downsamples it to 4k. in HQ mode, it takes the image in the centre of the sensor 1:1 at 4k. When downsampling from the whole sensor, some pixels are thrown away and therefore you lose some detail.

To expand on this a bit more, 8-bit or 10-bit colour has nothing to do with resolution. It relates to how many different colours are processed.

In 8-bit colour, there are 256 different levels of Red, Green and Blue. So 0,0,0 would be black and 255,255,255 would be white. 256 x 256 x 256 = 16.7m different colours.

In 10-bit colour, there are 1024 levels. 0,0,0 is still black but white is now 1023,1023,1023. 1024 x 1024 x 1024 = just over 1 billiion different colours.

Maveric Posted at 2018-10-2 13:08
To expand on this a bit more, 8-bit or 10-bit colour has nothing to do with resolution. It relates to how many different colours are processed.

In 8-bit colour, there are 256 different levels of Red, Green and Blue. So 0,0,0 would be black and 255,255,255 would be white. 256 x 256 x 256 = 16.7m different colours.

So 10bit is available in BOTH HQ and FOV? (as long as you use h265)

geoffz Posted at 2018-10-2 13:22
So 10bit is available in BOTH HQ and FOV? (as long as you use h265)

Correct. In D-Log and HLG mode.

Maveric Posted at 2018-10-2 12:58
This question was already answered above!

In FOV mode, it takes the image from the whole sensor (5.5k) and downsamples it to 4k. in HQ mode, it takes the image in the centre of the sensor 1:1 at 4k. When downsampling from the whole sensor, some pixels are thrown away and therefore you lose some detail.

But aren't you just throwing away the pixels to get down to the same number as HQ? i.e if you didn't throw away pixels you would have an image massively better than HQ. But I'll stop there as this has been done to death previously :-)

Bussty Posted at 2018-10-2 17:41
But aren't you just throwing away the pixels to get down to the same number as HQ? i.e if you didn't throw away pixels you would have an image massively better than HQ. But I'll stop there as this has been done to death previously :-)

If you didn't throw away any pixels from FOV you would have a bigger image than HQ but it would (in theory) be the same quality. In fact the HQ image would be in the middle of it pixel for pixel.

Obviously it's nothing like this simple but if you had to halve the size of a chess board and you threw away all the white squares you end up with a different board than if you took 32 squares from the middle.

Downsampling (Full FOV) doesn't always give less details than cropping(HQ), to the same result resolution. Think about Photoshop image processing.

It's all about processing power. There are many different downsample algorithms. The ones preserve details very well also consume more processing time. The image processor on drone cannot handle 25 images per second using the same high quality algorithm you can get from Photoshop.

Imagine if you can put a I9 desktop processor on the drone you can probably get Full FOV as sharp as (if not sharper) than HQ.

nxun Posted at 2018-10-3 00:12
Downsampling (Full FOV) doesn't always give less details than cropping(HQ), to the same result resolution. Think about Photoshop image processing.

It's all about processing power. There are many different downsample algorithms. The ones preserve details very well also consume more processing time. The image processor on drone cannot handle 25 images per second using the same high quality algorithm you can get from Photoshop.

heat/processor operating temperature.

Evidently, compared to the Ph4pro the little Mavic processor can't withstand the heat so subsamples and therefore the compromise in image quality.