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2,031 bytes added ,  08:20, 18 January 2014
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== Example session ==
 
== Example session ==
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Lines starting with $ are commands executed on the octave prompt.
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Let's load the package and list available hardware
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<code>
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$ pkg load image-acquisition
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$ imaqhwinfo
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ans =
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  scalar structure containing the fields:
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    driver = uvcvideo
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    card = UVC Camera (046d:0825)
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    bus_info = usb-0000:00:16.2-2
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    version = 3.2.51
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    capabilities =  83886081
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    device = /dev/video0
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</code>
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$
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$ obj = videoinput("v4l2", "/dev/video0")
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obj = videoinput for v4l2
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      device            = /dev/video0
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      driver            = uvcvideo
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      card              = UVC Camera (046d:0825)
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      VideoInput        = 0
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      VideoResolution    = 320 x 240 px
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      VideoFrameInterval = 1/30 s (30.0 fps)
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$ get(obj)
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ans =
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{
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  [1,1] = SelectedSourceName
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  [2,1] = DeviceCapabilities
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  [3,1] = VideoInput
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  [4,1] = VideoResolution
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  [5,1] = VideoFrameInterval
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  [6,1] = VideoFormat
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  [7,1] = brightness
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  [8,1] = contrast
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  [9,1] = saturation
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  [10,1] = white_balance_temperature_auto
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  [11,1] = gain
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  [12,1] = power_line_frequency
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  [13,1] = white_balance_temperature
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  [14,1] = sharpness
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  [15,1] = backlight_compensation
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  [16,1] = exposure_auto
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  [17,1] = exposure_absolute
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  [18,1] = exposure_auto_priority
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}
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$
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$ get(obj, "DeviceCapabilities")
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ans =
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  scalar structure containing the fields:
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    driver = uvcvideo
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    card = UVC Camera (046d:0825)
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    bus_info = usb-0000:00:16.2-2
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    version = 3.2.51
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    capabilities =  83886081
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$
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$ set(obj, "VideoResolution")
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ans =
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    640    480
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    160    120
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    176    144
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    320    176
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    320    240
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    352    288
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    432    240
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    544    288
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    640    360
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    752    416
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    800    448
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    800    600
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    864    480
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    960    544
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    960    720
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  1024    576
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  1184    656
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  1280    720
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  1280    960
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$ set(obj, "VideoResolution", [320 240])
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$
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$ get(obj, "brightness")
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ans =  100
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$ set(obj, "brightness")
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ans =
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  scalar structure containing the fields:
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    min = 0
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    max =  255
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    step =  1
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    default =  128
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$ set(obj, "brightness", 100)
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$
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$ preview(obj)
    
== Using v4l2loopback for tests ==
 
== Using v4l2loopback for tests ==
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