about i.MX8 ISI data convert

[xu_ji1]

Hello,

If camera sensor output is Raw12 bit pixel data,does ISI convert it to YUV420 output then send display or store image?

If it can how to do in code?

Or ISI only can convert RGB with YUV,not support RAW?

Thanks

[joanxie · Accepted solution]

GPU doesn't do this shift job you need shift by yourself, GPU can do the color space conversion job

[joanxie]

ISI couldn't convert raw data to yuv data, when get the raw data from camera, ISP could convert raw data to rgb or yuv

[xu_ji1]

Hello,

 Does i.MX8QM has ISP? 

Thanks

[joanxie]

yes, imx8qm support openCL or openVG, sw-ISP Pipeline Optimized by them

[xu_ji1]

Is there some demo app or API of convert RAW to YUV function that about openCL or openVG?

pls give guide how to realize convert RAW to YUV.

Thanks

[joanxie]

maybe you can refer to the source code as below:

https://bitbucket.sw.nxp.com/projects/GTEC/repos/demo-framework/browse/DemoApps/OpenCL/SoftISP

[xu_ji1]

hello,

I can not access this website.

Thanks

[joanxie]

find ISP information from this:

https://community.nxp.com/docs/DOC-345934 

[xu_ji1]

Hi,

I know this demo,but I try it with my RAW photo,it can not convert the correct YUV,my RAW photo is capture by Raw12bit output camera and the RAW data only has grey info V4L2 format is Y12,does softISP support it?Which API can convert it?

Thanks

[joanxie]

for capture raw 12bits data from ISI, you need to configure ISI to raw16 first,  Bit13~LSB(Bit 13~Bit 2):    0b00DD DDDD DDDD DD00,   right shift 2 bit to get RAW12: 0b0000 DDDD DDDD DDDD, then ISP can handle this data to conversion

[xu_ji1]

Hello,

Does the right shift 2 bit operation can be take by GPU side(have any API)?

If it is no,it needs to use CPU running then If we use the Raw12 camera output data and do image processing

convert to YUV in real time,it will cost much CPU resource,we don't want this,how to do the right shift 2 bit

and do not use CPU?GPU can or not?

Thanks