IMX6 Cropping Issue

raoudi82 — Mon, 09 Mar 2020 04:40:33 GMT

I am testing using a cropping example of ipu-example.
==========================================
// Input image size and format
task.input.width = 1280;
task.input.height = 1024;
//task.input.format = v4l2_fourcc('R', 'G', 'B', 'P');
task.input.format = v4l2_fourcc('U', 'Y', 'V', 'Y');

task.input.crop.pos.x = 480;
task.input.crop.pos.y = 460;
task.input.crop.w = 246;
task.input.crop.h = 262;

// Output image size and format
task.output.width = 480;
task.output.height = 480;
//task.output.format = v4l2_fourcc('R', 'G', 'B', 'P');
task.output.format = v4l2_fourcc('U', 'Y', 'V', 'Y');

task.output.crop.pos.x = 0;
task.output.crop.pos.y = 0;
task.output.crop.w = 480;
task.output.crop.h = 480;

==========================================

It is OK.
if i set task.input.crop.pos.x from 480 to 481, it is not work correctly.
The result is the same above settings(pos.x is 480).

For example, increasing the value of pos.x by 4, such as 480, 484, 488, works fine, but increasing by 1 does not work.

how can i this problem?

help me plz.

Re: IMX6 Cropping Issue

igorpadykov — Wed, 11 Mar 2020 07:34:54 GMT

Hi Han

seems it is IPU IC Main Processing Memory restriction as

described for example in sect.37.4.5.4 Main Processing Section

i.MX6DQ Reference Manual:

"Each memory word (128 bits) stores 4 adjacent pixels".

Best regards
igor
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IMX6 Cropping Issue

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