C.8.19.7 XA/XRF Multi-frame Presentation Module
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#### C.8.19.7 XA/XRF Multi-frame Presentation Module

Table C.8.19.7-1 specifies the Attributes of a XA/XRF Multi-frame Presentation Module.

Table C.8.19.7-1. XA/XRF Multi-frame Presentation Module Attributes

Attribute Name | Tag | Type | Attribute Description
--- | --- | --- | ---
Preferred Playback Sequencing | (0018,1244) | 3 | Describes the preferred playback sequencing for a multi-frame image. Enumerated Values: 0 Looping (1,2…n,1,2,…n,1,2,….n,…) 1 Sweeping (1,2,…n,n -1,…2,1,2,…n,…)
Frame Display Sequence | (0008,9458) | 3 | Sequence that specifies the display frame rate of a selected set of frames. The Items are ordered in increasing frame number. The range of the frames may not overlap and the ranges shall be adjacent. One or more items are permitted in this sequence.
>Start Trim | (0008,2142) | 1 | The Frame Number of the first frame of the set of frames to be displayed in this Item.
>Stop Trim | (0008,2143) | 1 | The Frame Number of the last frame of the set of frames to be displayed in this Item.
>Skip Frame Range Flag | (0008,9460) | 1 | A flag indicating that the range of frames in this item may be skipped. Defined Terms: DISPLAY SKIP
>Recommended Display Frame Rate in Float | (0008,9459) | 1 | Recommended rate at which the frames of this Item should be displayed in frames/second.
>Recommended Viewing Mode | (0028,1090) | 2 | Specifies the recommended viewing protocol(s). When this attribute is present with a value, this value shall override the value of Recommended Viewing Mode (0028,1090) specified in the Mask Module. Defined Terms: SUB subtraction with mask images NAT native viewing of image as stored ### Note If an implementation does not recognize the Defined Term for Recommended Viewing Mode (0028,1090), reverting to native display mode is recommended.
>Display Filter Percentage | (0028,9411) | 2 | Edge enhancement filter percentage that is recommended by the pixel data creator as filter presetting for display purposes. The value of 100 corresponds to the maximum filter strength that can be applied by a specific application displaying the image.
>Mask Visibility Percentage | (0028,9478) | 1C | The percentage of visibility of the mask frame during a subtracted display. A value of 0 corresponds to subtracted display, a value of 100 corresponds to un-subtracted display (native). See Section C.8.19.7.1. ### Note The value of 100 is equivalent to Recommended Viewing Mode (0028,1090) having a value of NAT. Required if Recommended Viewing Mode (0028,1090) equals SUB.

##### C.8.19.7.1 Multi-frame Presentation Attributes

###### C.8.19.7.1.1 Mask Visibility Percentage (Informative)

An example of the usage of the Mask Visibility Percentage (0028,9478) attribute is illustrated below.

Assume that Psub is the output pixel level of a subtracted frame,its calculation can be expressed as followed:

Pcontrast: Pixel level of the contrast frame in the logarithmic domain

Pmask: Pixel level of the mask frame in the logarithmic domain

X: Mask Visibility Percentage (0028,9478): 0 <= X <= 100

Psub = Pcontrast- (1- X/100) * Pmask

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