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by elnexo
Wed Feb 12, 2014 1:12 pm
Forum: Camera board
Topic: Permanently turn AWB off
Replies: 125
Views: 36273

Re: Permanently turn AWB off

...Woud be nice to be able to use a fixed CCM but fas with all these things its finding the time to implement it on the GPU and expose the controls to the ARM. Its quite long-winded. I understand that this takes time and you guys are pretty busy. I would be more than glad to look through the code a...
by elnexo
Fri Feb 07, 2014 10:21 pm
Forum: Camera board
Topic: Permanently turn AWB off
Replies: 125
Views: 36273

Re: Permanently turn AWB off

No, the GPU contains a full camera ISP, independent of any other GPU features. It's a pretty good one (as used in the Nokia 808, still regarded as one of the best camera phones), certainly better than the inbuilt on in the sensor. It's implemented in mostly HW blocks that are managed by the vector/...
by elnexo
Thu Feb 06, 2014 10:22 pm
Forum: Camera board
Topic: Permanently turn AWB off
Replies: 125
Views: 36273

Re: Permanently turn AWB off

To clarify: The OV5647 sensor is set up and operated using i2c. The CSI interface is the high-speed LVDS communication channel that pumps high-definition video data through 6 wires. . When you say GPU, you mean that kind of graphical processing unit that you can use openGL program it, right? So pro...
by elnexo
Wed Feb 05, 2014 10:40 pm
Forum: Camera board
Topic: Permanently turn AWB off
Replies: 125
Views: 36273

Re: Permanently turn AWB off

We don't use the on chip AWB, its all done in the GPU. And you cannot access the camera registers from ARM space. The pi camera implementation of the CSI interface does not expose an i2C (SDA SCL) interface? Are you using the default register settings of the sensor then? It would be really great if...
by elnexo
Tue Feb 04, 2014 10:35 pm
Forum: Camera board
Topic: Permanently turn AWB off
Replies: 125
Views: 36273

Re: Permanently turn AWB off

Ok checked Datasheet on (http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Dev/RaspberryPi/ov5647_full.pdf) I believe the Pi camera used the OV5647, right? Check out register 0x5001 bit[1] awb_en But, this is not what actually will fix your issue alone. I believe the key register here is 0x5180 bit [5]...
by elnexo
Tue Feb 04, 2014 10:00 pm
Forum: Camera board
Topic: Permanently turn AWB off
Replies: 125
Views: 36273

Re: Permanently turn AWB off

I don't have a pi but work with Omnivision sensors and others. Most of the sensors have awb intelligence built in. thus, you can set it up via i2c register settings. - get datasheet of the camera chip. - find auto white balance section. - use i2c command to set register of Awb control to fix current...

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