MATLAB VIDEO AND IMAGE PROCESSING BLOCKSET 3 Guide de l'utilisateur télécharger pdf (Page 21)

Version 2.5 (R2008a ) Video and Image Processing Blockset™

Compatability Considerations

To change the non-tunable parameters while you are working with a model,

you must stop a running simulation, change the parameter, and then start

the simulation again.

Enhanced From Multimedia File Block

The Video and Image Processing From Multimedia F i le b lock now allows for

proper synchronization of vide o and audio. Also, the determination of the

Frames Per Second (FPS) in the From Multimedia File Block was improved

for increased accuracy. As a result of these changes, this block might provide

a different sample time to the model. For more information about the

calculation of the default sample time b y the this block, please consult the

From Multimedia File block reference page.

Compatibility Considerations

Your existing models might error out if you are combining the output from

a From M ultimedia File block with the output from another source block

duetothechangeintheFromMultimediaFileblock. Sampletimemight

nowbedifferentfromthesampletimefromanothersourceblockinyour

model, causing the model to error. If this happens, you can either change the

sample time of the other source block to

−1

(inherited), or explicitly specify

thesampletimeyouwanttouseintheFromMultimediaFileblock’sDesired

sample time parameter.

Enhanced Blob Analysis Block

The Specify maximum blob area in pixels param eter in the Blob

Analysis Block is now tunable for both Simulation and Code Generation.

To accommodate this enhancement the Specify m aximum blob area in

pixels parameter has been modified to no longer accept

inf.Themaximum

allowabl e val ue is now calcula ted to be the maximum o f

uint32 data type.

Compatibility Considerations

Entering inf for the Specify maximum blob area in pixels parameter

will cause an error.

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MATLAB VIDEO AND IMAGE PROCESSING BLOCKSET 3 Guide de l'utilisateur Page 21