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Re: image-acquisition package install

From: Kire Pudsje
Subject: Re: image-acquisition package install
Date: Tue, 6 Dec 2016 15:21:52 +0100

No. I guess your question because of speed issues? I am looking into getting a higher update rate.
What kind of update rate do you get?
Here on my work machine octave is very slow, because the virus scanner constantly wants to check each file.

Could you try something like this (untested code), but you get the idea adjust N as appropriate?
for i=1:N

2016-12-06 14:28 GMT+01:00 Dominic Bitter <address@hidden>:

@Kire Pudsje

Is there a way to load a section of a snapshot, without getting the full image first?




Von: Kire Pudsje [mailto:address@hidden]
Gesendet: Sonntag, 4. Dezember 2016 19:55
An: Dominic Bitter <address@hidden>
Cc: Nicholas Jankowski <address@hidden>; Andreas Weber <address@hidden>; address@hidden

Betreff: Re: image-acquisition package install


And an updated version. Everything except help and live-preview should work now.

I also implemented the set function like the image-acquisition package, to give back the range and step size for the setting.

I will not be trying to get live preview to work. Next step is integrating it in the image-acquisition package. With a little lick I can re-use their preview stuff.


2016-12-02 22:58 GMT+01:00 Dominic Bitter <address@hidden>:

Hello Kire,

thanks for the code.


I have a Matlab script from a colleague which (if i remeber it right) is able to get live images from USB cams.

Sadly i can’t get a Matlab license for me there.

If it can help you i can ask him on Monday and send you the file.


Von: Kire Pudsje [mailto:address@hidden]
Gesendet: Freitag, 2. Dezember 2016 20:49
An: address@hidden; address@hidden; address@hidden; address@hidden
Betreff: Re: image-acquisition package install




I am busy implementing webcam support on Windows.

I based it on the interface described by the webcam package of matlab


It is currently in a very early and rough stage. No help yet, very dirty code, etc. I only managed to get it working today, but it can already obtain images. Also Brightness, backlight etc, can be set. No resolution control at the moment.

Once I have everything working, I might try and integrate it in the img-acq package.


>> pkg load webcam
>> webcamlist
ans =
  [1,1] = VGA Webcam
  [2,1] = HD 720P Webcam
>> cam=webcam(1);
warning: This is work in progress, be prepared for segfaults
warning: called from
    webcam at line 8 column 15
>> cam.get()
ans =

  scalar structure containing the fields:

    Name = VGA Webcam
    Resolution = 640x480
    AvailableResolutions =
      [1,1] = 640x480
      [2,1] = 640x360
    Brightness = 0
    Contrast =  32
    Hue = 0
    Saturation =  64
    Sharpness =  4
    Gamma =  221
    WhiteBalance = auto
    BacklightCompensation = off
    Exposure = auto



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