i.MX Processors中的主题 split/rolling image

split/rolling image

liamtien — Thu, 23 Aug 2018 11:10:28 GMT

My capture picture is split/rolling image issue, as attached, any solution is appreciation.

Re: split/rolling image

igorpadykov — Thu, 23 Aug 2018 23:19:24 GMT

Hi liam

split/rolling image may be due to timings or with interlaced data from sensor.

What processor used in the case, one can look at documentation on below link

and try to debug in sensor driver

i.MX Software|NXP

Best regards
igor
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

Re: split/rolling image

liamtien — Fri, 24 Aug 2018 03:06:55 GMT

The proccessor is i.MX6Q, FPGA send greyscale 16bits data via parallel DVP interface.

Re: split/rolling image

igorpadykov — Fri, 24 Aug 2018 04:35:42 GMT

There are some posts covering some topics about raw capture:
https://community.nxp.com/thread/302769
https://community.nxp.com/thread/320618
https://community.nxp.com/thread/355469
https://community.nxp.com/thread/319780

Re: split/rolling image

liamtien — Mon, 27 Aug 2018 10:54:09 GMT

Does IMX6Q has the register can tune VSYNC timing?

In camera_callback( ) of mxc_v4l2_capture.c:

when (done_frame->buffer.flags & V4L2_BUF_FLAG_QUEUED) is true, I get current time by do_gettimeofday() , the interval between two frames sometimes is T usec, sometimes randomly changes to 2T usec.

I wonder if it is the input VSYNC signal issue? How to solve it? Thanks.