topic Re: USING SAME UIMAGE FOR DIFFERENT RESOLUTION in i.MX Processors

USING SAME UIMAGE FOR DIFFERENT RESOLUTION

shanmugamsundar — Wed, 15 May 2013 07:51:04 GMT

hi all,

I am using i.mx535 board in that we interface a camera application and we done the capturing of all resolution videos and images for that we are using seperate uImage for capturing the different resolution

CAMERA SENSOR: ov5640

For Eg:-

for 640x480 jpeg image we are using a seperate uImage1

for 720p jpeg image Uimage 2

for 1080p uImage 3 like these

can any one help me how to capture all the resolution jpeg Images in a single uImage how can i change the ioctl functions

NOTE:

There is a seperate jpeg register settings for seperate resolutions

Thanks,

shan

Re: USING SAME UIMAGE FOR DIFFERENT RESOLUTION

BrilliantovKiri — Wed, 15 May 2013 12:46:36 GMT

Hello, shan!

What different in configuration for your uImage?
As example you can configure CMOS on maximum resolution and modify video buffer after, e.g. in ColorSpaceConverter or use GStreamer videoscale.

Re: USING SAME UIMAGE FOR DIFFERENT RESOLUTION

shanmugamsundar — Fri, 17 May 2013 08:00:51 GMT

hi kirill,

Using the Gstreamer application we capturing only the video that is no probem it's absolutely fine,

My problem is in Image capturing, we are using a Generic capture C application for capturing the images of various resolution, for that we pass the v4l2 format parameters such as width, height, buf type, image format whether it is YUYV or RGB etc from the application.

when we execute the application it communicates with mxc_v4l2_capture.c file and set the parameters, the particular parameters will be set in the driver and sensor starts to capture the appropriate resolution image.

So, In the ov5640.c under the Register structure 640_480 we replace the RAW settings with the JPEG settings

of 720p or 1080p resolution image and we make a seperate uImage for two resolution, we load this in the board and execute the corresponding User application it ll capture the images of 720p or 1080p with capturemode=0 and image is fine

Now, i need to capture all the resolution images in single uImage file.

NOTE:

When i gothrough the freescale mmcodecs source, They are passing the capturemode and v4l2_format in the mfw_v4l2_gst_src file for capturing the video, if we pass the capturemode , width and height in the gst command line it writes the apropriate register settings in the sensor and captures the video

For me, if i pass the capturemode in the user application it takes the picture in raw mode only, when i enable the jpeg settings in the register the image is not coming, but it takes corresponding register settings under the structure in ov5640.c

hi kirill, if you cant able to understand the problem in text, you can contact me at this skype id shanmugam.891

Sorry, for confusing you and Thanks for your reply,

Thanks,

shan

Re: USING SAME UIMAGE FOR DIFFERENT RESOLUTION

BrilliantovKiri — Fri, 17 May 2013 09:39:59 GMT

Ok, but I not understand why you use different uImage if you can configure CMOS from user-space.

And you can modify drivers if it work not correct for your.

Re: USING SAME UIMAGE FOR DIFFERENT RESOLUTION

fabio_estevam — Fri, 17 May 2013 22:41:19 GMT

The unit test code allows capturing from the camera by passing the width and height as parameters.