ImageItemTypedefines the general characteristics of an ImageItem which represents a matrix of values like an image, where the pixel position is given by X which is the column and Y the row. The value is the pixel intensity.

ImageItemTypeis formally defined in Table 11.

Table 11– ImageItemType definition

Attribute	Value
BrowseName	ImageItemType
IsAbstract	False
ValueRank	2 (2 = two dimensional array)
DataType	BaseDataType
References	NodeClass	BrowseName	DataType	TypeDefinition	ModellingRule
Subtype of the ArrayItemType defined in 5.3.4.1
HasProperty	Variable	XAxisDefinition	AxisInformation	PropertyType	Mandatory
HasProperty	Variable	YAxisDefinition	AxisInformation	PropertyType	Mandatory

Engineering units and range for the Valueare defined by corresponding Propertiesinherited from the ArrayItemType.

The DataTypeof this VariableTypeis restricted to SByte, Int16, Int32, Int64, Float, Double, ComplexNumberType and DoubleComplexNumberType.

The ArrayDimensions Attributefor Variablesof this type or subtypes shall use the first entry in the array ([0]) to define the number of columns and the second entry ([1]) to define the number of rows, assuming the size of the matrix is not dynamic.

XAxisDefinition Propertyholds the information about the engineering units and range for the X-Axis.

YAxisDefinition Propertyholds the information about the engineering units and range for the Y-Axis.

The StatusCode.SemanticsChangedbit shall be set if any of the InstrumentRange, EURange, EngineeringUnits, Title, XAxisDefinitionor YAxisDefinition Propertiesare changed.