[Elphel-support] How to calibrate other cameras

[Amir Ahmad Shishegar]

Dear Andrey,

Very thanks  for your reply and your valuable time.
As this video is the only key to find the murderer, so everything that can
only recover some pixels of video is vital for me.
Fortunately the camera whose recorded the scene is a fixed camera with no
movable part.
In some frames of video it seems that the face and number plate of the
murderer's motorcycle has not so much motion blur, so it seems that if we
can restore the optical blur of camera lens, it will be a big gain.
The video is in PAL format and is recorded by a DVR, I try soon to upload
whole video or at least some important clips  for you. The scene in
different frame are about 5,6,13 meter far from camera.
I know you are very busy, but I appreciate you very much if you help me how
to use Aberration_Correction plugin as much as possible.
Also I welcome any other product even commercial ones that can help me to
measure accurately the camera psf at a fixed location to restore a part of
video, If you know any practical one please and please inform me.

Best Regards,
A sad but hopeful father,
Amir Ahmad Shishegar




On Wed, Jan 23, 2013 at 11:29 PM, support-list <
support-list at support.elphel.com> wrote:

> **
> Dear Amir Ahmad,
>
> I'm very sorry for your loss, but I'm afraid our calibration can not help
> much, here is why:
> 1 - in the ideal circumstances we were able to improve linear resolution
> by a factor of 1.5 - 2.0. Yes, that doubled effective megapixels of the
> camera, but not much more.
> 2 - we use lenses with fixed focus and iris, the camera in your case may
> have some moveable mechanical components that were in unknown state during
> shooting. Or is it so basic that it has fixed focus/iris?
> 3 - we only developed software for lens aberration correction, motion blur
> is a different thing. In many cases it is easier to correct and there is
> some software to do that - I just do not have any experience with it.
>
> Is it a single shot or video of the criminal? Is it posted somewhere on
> the Internet to look at it and see how bad is it? What was the distance?
> how big (in pixels) is the face?
>
> Andrey
>
> ---- On Sat, 19 Jan 2013 13:47:07 -0800 *Amir Ahmad Shishegar<
> shishegar.amir at gmail.com>* wrote ----
>
> Dear Sir/Madam,
>
> First thanks for developing and maintaining the Elphel project.
> As a brief description I am father of a boy who has killed by a murderer
> some months ago, police has found some video evidence of the murderer but
> the face of murderer is not focused and suffer from optical and motion blur.
> The camera who has captured the scene is some low quality Chinese camera
> who has not any brand.
> I searched the internet and studied many articles on how to restore
> out-of-focus or motion blurred images with non-blind deconvolution or
> psf measurement but found your project more comprehensive and with
> practical tools.
> Now I am to use the tools you have developed for Eyesis post-processing to
> calibrate and psf measurement of camera who has captured the scene.
> But I have not found any document on what are the differences is in
> workflow for using it for other camera instead of Eyesis.
> As this is the only way remained to find my child murderer, so I
> appreciate you very much if you help me how to use your post-processing
> tools to measure the psf of a scene which has occurred at a fixed distance
> of camera and then restore the images.
>
>
> Regards,
> Amir Ahmad Shishegar,
> Dubai,UAE,
> Tel: +1-414-2929074
>
> _______________________________________________
> Support-list mailing list
> Support-list at support.elphel.com
> http://support.elphel.com/mailman/listinfo/support-list_support.elphel.com
>
>
>
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