Материал: part03

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Defined Terms:​

MULTILINE​

INFINITELINE​

CUTLINE​

RANGELINE​

RULER​

AXIS​

CROSSHAIR​

ARROW​

RECTANGLE​

ELLIPSE​

Note​

Implementers may add private graphic types.​

>>Include Table C.10-5a “Text Style Sequence Macro​See Section C.10.5.1.3.12​ Attributes”​

>>IncludeTableC.10-5b“LineStyleSequenceMacro​See Section C.10.5.1.3.13​ Attributes”​

Diameterofthecirclearoundtheorigin,specifiedbyGraphicData(0070,0022)​ where the CROSSHAIR is not rendered.​

The Compound Graphic Units (0070,0282) of Gap Length (0070,0261) shall​ be DISPLAY.​

See Section C.10.5.1.3.​

Required if Compound Graphic Type (0070,0294) equals CUTLINE,​

INFINITELINE or CROSSHAIR.​

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BOTTOM​

CENTER​

TOP​

See Section C.10.5.1.3.​

Required if Compound Graphic Type (0070,0294) equals RULER, AXIS or​

CROSSHAIR.​

Enumerated Values:​

BOTTOM​

TOP​

See Section C.10.5.1.3.​

Required if Compound Graphic Type (0070,0294) equals RULER, AXIS. or​

CROSSHAIR.​

Enumerated Values:​

Y​Yes​

N​No​

Required if Compound Graphic Type (0070,0294) equals RULER, AXIS or​

CROSSHAIR.​

Enumerated Values:​

Y​yes​

N​no​

Required if Compound Graphic Type (0070,0294) equals RECTANGLE or​

ELLIPSE.​

>>Include Table C.10-5c “Fill Style Sequence Macro​In this Module, Attribute Fill Style Sequence (0070,0233) is Type 1C.​

Attributes”​

Required if Graphic Filled (0070,0024) equals Y.​

See Section C.10.5.1.3.14​

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C.10.5.1 Graphic Annotation Attribute Descriptions​

C.10.5.1.1 Unformatted Text Value​

The text shall be displayed if any part of the bounding box or anchor point is within the Specified Display Area.​

The text need not be confined to within the bounding box, but shall be rendered in a direction from the Top Left Hand Corner (TLHC)​ of the bounding box to the Bottom Right Hand Corner (BRHC) of the bounding box, even if these coordinates have been specified in​ an image relative space and then transformed (rotated, flipped or scaled).​

Note​

1.​An implementation may render text outside the confines of the bounding box if necessary to display all the specified​ text.​

2.​Alternatively, an implementation may choose to render the text in a scrolling box, or a link to another fixed or popup​ window as appropriate.​

Whether the contents of the bounding box completely opacify the underlying image or whether the box is "transparent" is undefined.​

Note​

1.​For example, an implementation may choose an "exclusive or" style opacification to be sure that the text is discernible​ over light and dark portions of the image.​

2.​Commonly,theregionof the bounding box around the text will be rendered "transparently", i.e., the imagewillbe visible,​ though some implementations may choose to opacify the bounding box behind the text to improve its readability.​

Analternativetospecifyingaboundingbox,istospecifyanAnchorPoint(0070,0014),i.e.,somepointinanimageorSpecifiedDisplayed​ Area that is related to the text. The semantics of this relationship, and the manner of positioning or linking the text to this point, are​ unspecified.​

Note​

1.​For example, a description of a feature may be linked to a point in the image, and when that image is displayed, if it is​ magnifiedandpanned,therenderedtext(andanyarroworlinedrawninresponsetoAnchorPointVisibility(0070,0015))​ might be repositioned as appropriate so as not to be cropped out of the Specified Displayed Area.​

2.​As another example, the text could be rendered in a pop-up window when a hypertext link flagged on the displayed​ image at the location of Anchor Point (0070,0014) is selected.​

3.​The bounding box and anchor point need not be defined with the same axis units, i.e., one can be image pixel relative,​ and the other displayed area relative.​

The size, font and rotation of the individual rendered text characters are unspecified.​

C.10.5.1.2 Graphic Data and Graphic Type​

Graphic Data (0070,0022) contains the points in the graphic annotation, each dimension for the first point, followed by dimensions​ for second point, etc. For a two dimensional curve: X1, Y1, X2, Y2, etc. The first (X) dimension corresponds to the image or Specified​ Displayed Area column (horizontal offset), and the second (Y) dimension corresponds to the image or Specified Displayed Area row​ (vertical offset). The Value Representation of all components of the N-tuple shall be the same. The image or Specified Displayed​ Area relative drawing space is defined in Graphic Annotation Units (0070,0005).​

If Graphic Type (0070,0023) is POINT, then two values (one point) shall be specified and the single point specified is to be drawn.​

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If Graphic Type (0070,0023) is POLYLINE, then the points are to be interpreted as an n-tuple list of end points between which straight​ lines are to be drawn.​

If Graphic Type (0070,0023) is INTERPOLATED, then the points are to be interpreted as an n-tuple list of end points between which​ some form of implementation dependent curved lines are to be drawn. The rendered line shall pass through all the specified points.​

If Graphic Type (0070,0023) is CIRCLE, then exactly two points shall be present; the first point is to be interpreted as the center and​ the second point as a point on the circumference of a circle, some form of implementation dependent representation of which is to​ be drawn.​

If Graphic Type (0070,0023) is ELLIPSE, then exactly four points shall be present; the first two points are to be interpreted as the​ endpoints of the major axis and the second two points as the endpoints of the minor axis of an ellipse, some form of implementation​ dependent representation of which is to be drawn.​

The notion of "open" or "closed" has no inherent meaning in the context of an arbitrary graphic, other than in the condition for the​ presenceofGraphicFilled(0070,0024).Thegraphichasnosemanticnotionofanassociatedobservationsuchasaregionofinterest,​ except that which the unformatted text in the same Item may describe.​

The choice of pixel value used to represent the graphic on a display is defined in the Graphic Layer Module.​

Point (0.0,0.0)

Pixel (1,1)

Point (1.0,1.0)

Point (511.0,511.0)

Pixel (512,512)

Figure C.10.5-1. Sub-pixel Addressing Units in PIXEL Space​

C.10.5.1.3 Compound Graphic Sequence​

The Attributes of the Compound Graphic Sequence (0070,0209) are described within this section.​

For point encoding rules of Graphic Data (0070,0022) See Section C.10.5.1.2.​

All graphics are applied after the application of the image rendering pipeline.​

C.10.5.1.3.1 Compound Graphic Instance ID​

Every Item in the Compound Graphic Sequence shall have a Compound Graphic Instance ID (0070,0226) with a value that is unique​ within this Sequence.​

There shall be one or more Items in the Graphic Object Sequence or Text Object Sequence that represents an alternate rendering​ of the Compound Object Sequence Item. As a linkage for backward compatibility these Items share the same Compound Graphic​ Instance ID (0070,0226).​

Note​

Every Compound Graphic has an equivalent rendering encoded as a set of simple graphic objects linked by the Compound​ Graphic Instance ID (0070,0226). Simple graphic objects are elements such as points, polylines, interpolated lines, circles​

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