AM62A7-Q1: AM62A ISP uses non-fixed exposure (100~33000us), and the image is blue.

Hello Yangrongbo,

When you had non-fixed exposure time (100~33000us), was the image brightness okay? Can you print out the exposure time calculated by the 2A algorithm? 

When you tuned AWB, did you use fixed exposure or automatic exposure?

Thank you.

Jianzhong

Hi Yangrongbo,

I suppose you developed the IMX623 driver for AM62A on your own.

Do you receive the xml files from Sony or do you do the tuning on your own camera?

For Sony, sensor exposure is always fixed at 11ms.

HI，  Jianzhong,

  When I tuned awb, I use fixed exposure. The exposure time calculated by 2A algorithm is as follows:

HI， Gang Hua，

Yes, the imx623 driver we developed，we do the tuning on my own camera。

yes，For Sony, sensor exposure is always fixed at 11ms， However, the image is too dark, so I want to increase the brightness by adjusting the exposure。

In addition, how to set H3A_INPUT_LSB appropriately, 2 or 4?

yangrongbo said:

In addition, how to set H3A_INPUT_LSB appropriately, 2 or 4?

It is typically around 2~6.

You may start with 4 and adjust if necessary.

I cannot tell if your AWB calibration is correction.

Could you share your tuning tool project for AWB calibration?

HI, Gang Hua,

     AWB calibration:

Hi Yangrongbo,

The calibration plots look fine to me.
That is probably why you don't see any issue with 11ms exposure time.

yangrongbo said:

uses non-fixed exposure (100~33000us), and the image is blue.

What is the condition for the images to be blue?
Could you please share the sensor companding knee points and some raw images in failure case?

HI, Gang Hua,

When the environmental brightness changes and the gain is adjusted, it will turn blue.

image:

Companding knee points:

HI,Gang Hua

   On Sony's official website, I don't have permission to download the imx623 module. Can you help me download it

Hi yangrongbo,

You will have to go through their request/approval process I guess.

I am not able to do anything on Sony's website.

HI,Gang Hua：

    How to remove black levels before PWL decompression？

HI,Gang Hua：

  Thank you for your reply. I understand that 1037 has been changed to 1073

HI, Gang Hua:

From below sensor companding knees points before adding 200 black level
0 0
273 1118481
546 2236962
3822 15658734
4095 16777215
65535 16777215

To decompanding knee points used by AWB plugin 

0 0
200 0
1118681 273
2237162 546
15658934 3822
16777415 4095
16777415 65535

Is it correct?

yangrongbo said:

I understand that 1037 has been changed to 1073

Yes, that is a typo.

yangrongbo said:

0 0
273 1118481
546 2236962
3822 15658734
4095 16777215
65535 16777215

This does not look like reasonable sensor companding knee points.

Anything below 1118481 in the linear raw image would get lost during sensor companding.

HI, Gang Hua:

From below sensor companding knees points before adding 240 black level

0 0
256 256
512 1024
831 3900
994 7800
1319 23400
1984 87315
2530 174630
2871 349260
2968 548421
3258 1736000
3541 5208000
3855 16777215
65535 16777215

yangrongbo said:

0 0
256 256
512 1024
831 3900

Yes, this looks good and you can add the black level on top.

Hi Gang Hua:

  The black level has been added and the AWB verification looks good, but the ISP estimates the color temperature to be around 3000 and the actual color temperature to be 7500. Do you have any suggestions?