TDA4VM: How to reduce exposure of image sensor.

OBUCHI YOHEI

Prodigy 210 points

Part Number: TDA4VM

Hi , experts.

I use Linux & RTOS mode on TDA4VM at following environment.

SDK:

ti-processor-sdk-rtos-j721e-evm-08_00_00_12
ti-processor-sdk-linux-j7-evm-08_00_00_08

I am using TDA4VM SDK with AR0820 to capture images. image Sensor settings are the Default provided by your company.

(ti-processor-sdk-rtos-j721e-evm-08_00_00_12\imaging\sensor_drv\src\ar0820)

With that setting, when the color temperature is high in the daytime (over 10,000 lx), the current mode (Three shutter WD)

Q1 . I want to suppress the exposure. Is there any way to reduce the exposure?

over 3 years ago

0 OBUCHI YOHEI over 3 years ago

Prodigy 210 points

If we want to reduce the exposure , we need to change "OPERATION_MODE_CTRL" at following.
It is correct? Do I need to make any other changes?

About the current exposure,
From code (ti-processor-sdk-rtos-j721e-evm-08_00_00_12\imaging\sensor_drv\src\ar0820\ar0820_wdr_config.h)

From doc

0 Hibino Tsutomu over 3 years ago in reply to OBUCHI YOHEI

Prodigy 100 points

Could you teach us the two exposure mode mode of setting about AR0820?

+1 Gang Hua over 3 years ago in reply to Hibino Tsutomu

TI__Guru 59600 points

Hi Hibino and Obuchi,

Sorry, we have missed your question here.

The register information we have for AR0820 is under NDA with OnSemi and therefore we cannot discuss the details with you.

For reducing the sensor exposure time, you may refer to the "AR0820_SetAeParams(...)" function in "iss_sensor_ar0820.c".
This function changes the sensor exposure time.

Best,
Gang

0 OBUCHI YOHEI over 3 years ago in reply to Gang Hua

Prodigy 210 points

Hi Gang

Thank you for reply.
I understood.

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TDA4VM: How to reduce exposure of image sensor.