MATLAB IMAGE ACQUISITION TOOLBOX - RELEASE NOTES Podręcznik Użytkownika Pobierz pdf (Strona 115)

Defining Device-Specific Properties

6-3

Device Specific Properties:

Brightness = -10

Contrast = 266

Exposure = 1024

ExposureMode = auto

Hue = 0

Saturation = 340

Sharpness = 40

Suggested Algorithm

When a user calls the videoinput function, the engine calls the

getDeviceAttributes() function to set up any device-specific properties you

have defined for the device. The engine passes several arguments to your adaptor's

getDeviceAttributes() function:

void getDeviceAttributes(const imaqkit::IDeviceInfo* deviceInfo,

const char* acqFormat,

imaqkit::IPropFactory* devicePropFact,

imaqkit::IVideoSourceInfo* sourceContainer,

imaqkit::ITriggerInfo* hwTriggerInfo)

Argument Data Type Description

deviceInfo Handle to a IDeviceInfo

object

Specifies the image acquisition

device

acqformat Text string Specifies the video format or the

path to a device configuration file

devicePropFact Handle to a IPropFactory

object

Provides member functions used

to create properties

sourceContainer Handle to a

IVideoSourceInfo object

Defines the video sources

available with this device,

described in “Identifying Video

Sources” on page 4-9

hwTriggerInfo Handle to a ITriggerInfo

object

Specifies hardware triggers. The

toolbox handles the other two

trigger types (immediate and

manual) automatically.

The algorithm for getDeviceAttributes() typically includes these steps:

1 2 ... 110 111 112 113 114 115 116 117 118 119 120 ... 171 172

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