MATLAB VIDEO AND IMAGE PROCESSING BLOCKSET 3 User's Guide Page 65
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Working with Multimedia Files
WorkingwithMultimediaFiles
If you are working on a Windows platform, Video and Image Processing
Blockset contains blocks that you can use to import and view multimedia files.
These blocks include the From Multimedia File b lock, the To Multimedia
File block, and the To Video Display block. Thes e blocks perform best on
platforms wi t h D irectX Version 9.0 or later and Windows Med ia Version 9.0 or
later. They also support code generation. If y ou generate code from a model
that contains a To Video Display block, you can view the video stream w hen
you run the executable.
This section includes the following topics:
• “Importing and Viewing Multimed ia Files” on page 2-25 — U se th e From
Multimedia File block to import video data into y o u r Simulink m o del and
theToVideoDisplayblocktoviewit
• “Exporting to M ultimedia Files” on page 2-27 — Use the To Multimedia
File block to export video data to a m ultimedia file
• “Working with Audio” on page 2-31 — Use the To Multimedia File block to
writeseparateaudioandvideodatatoasinglemultimediafile
Importing and Viewing Multimedia F iles
In this example, you u se the From Multimedia File block to import a video
stream into a Simulink model and the To Video Display block to view it. This
procedure a ssumes you are working on a Windows platform:
1 Create a new Simulink model, and add to it the blocks shown in the
following table.
Block Library Quantity
From Mu lti media File Video and Image
Processing Blockset >
Sources
1
To Video Display Video and Image
Processing Blockset >
Sinks
1
2-25
- VideoandImagePro 1
- User’s Guide 1
- 508-647-7000 (Phone) 2
- 508-647-7001 (Fax) 2
- The MathWorks, Inc 2
- 3 Apple Hill Drive 2
- Natick, MA 01760-2098 2
- Revision History 3
- Contents 5
- Working with MPlay 6
- Conversions 6
- Getting Started 9
- 1 Gettin g Started 10
- Installation 11
- Product Demos 13
- Viewing the Documentation 15
- What Chapter Should I Read? 17
- Key Blockset Concepts 19
- Defining Intensity and Color 21
- From File block dialog box 23
- Key Blockset Con cepts 25
- Coordinate Systems 27
- Sample Time 29
- Normal and Accelerator Mode 31
- Neares t neighbor 33
- Block Data Type Support 36
- Image Credits 40
- Importing and Exporting 41
- Working with AVI Files 42
- Exporting to AVI Files 46
- Same as input 47
- Importing and Exporting Video 48
- Intensity 50
- [[5 10]' [80 10]'] 54
- %d' 55
- '%s region 57
- 'Frame %d' 59
- Video only 60
- WorkingwithMultimediaFiles 65
- Separate color signals 66
- Exportin 67
- Fi xed- step 70
- Working with Audio 71
- Working with Multimedia Files 73
- 3 Working with MPlay 78
- Viewing Video Files 82
- 7 Experim 85
- IntensitytoBinaryConversion 88
- 4 Positi 89
- Connect the 91
- Autothreshold Block 93
- Color Space Conversion 100
- 4 Conversions 102
- Chroma Resampling 105
- Symmetric 107
- No pad ding 107
- Fixe d-st ep 111
- Geometric Transformation 113
- Interpolation Overview 114
- Bilinear Interpo lation 115
- 5 Geometri c Transformation 116
- 0 0 0 1 1 2 2 3 3 0 0 0 0 117
- 0 0 0 4 4 5 5 6 6 0 0 0 0 117
- 0 0 0 7 7 8 8 9 9 0 0 0 0 117
- Rotating an Image 118
- Expanded to fit 121
- Free running 121
- Resizing an Image 125
- Cropping an Image 132
- Morphological Operations 139
- Over view of Morphology 140
- CountingObjectsinanImage 141
- 6 Morphological Operations 142
- 'disk',15) 151
- Analysis and Enhancement 157
- Feature Extraction 158
- 7 Analysis and Enhancement 160
- Finding Lines in Images 165
- Zero-based 169
- Image Enhancement 183
- Separat e color signals 185
- I array at the output ports 185
- Separate color signals 185
- Pixel Statistics 215
- Separate color signa ls 217
- Example Applications 223
- Pattern Matching 224
- 8 Example Applications 226
- Fixed-step 229
- Motion Compensation 231
- Image Compression 233
- Accelerator mode 1-23 247
- Normal and Accelerator 1-23 250
- Normal mode 1-23 250
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