MATLAB IMAGE ACQUISITION TOOLBOX - RELEASE NOTES Guia do Utilizador descarregar pdf (Página 87)

Specifying the Format of the Image Data

5-9

describe how the bytes of red, green, and blue data are arranged in memory. In packed

formats, the red, green, and blue triplets are grouped together. In nonpacked formats,

all the red data is stored together, followed by all the green data, followed by all the blue

data. The following figure illustrates this distinction.

Packed and Planar Formats

To get more information about video formats, go to the fourcc.org Web site.

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User's Guide 1
How to Contact MathWorks 2
Revision History 3
Contents 5
Defining Your Adaptor Class 6
Getting Started 11
Custom Adaptors 12
What Knowledge Is Required? 13
Creating an Adaptor 14
Creating an Adaptor 15
1 Getting Started 16
Looking at the Demo Adaptor 17
Setting Breakpoints 19
Running the Demo Adaptor 21
Using Environment Variables 25
Select Win32 Project 27
Select Win32 27
Specify name and location 27
Click OK 27
Select DLL 28
New Project 29
Select VC++ Directories 31
Select General 33
Select Input 35
Specify library names 36
Select Code Generation 38
Set these properties 38
Select Language 39
Set this property 39
Select Command Line 40
Save the makefile 43
Creating a Stub Adaptor 48
DeviceInfo fields are empty 50
Storing Device Information 55
Storing Format Information 56
Storing Adaptor Data 61
Unloading Your Adaptor DLL 63
4 Defining Your Adaptor Class 68
Identifying Video Sources 73
Acquiring Image Data 81
Specifying Image Dimensions 83
Specifying Frame Type 85
Acquiring Image Data 100
Supporting ROIs 102
5 Acquiring Image Data 104
Supporting Hardware Triggers 105
Using Critical Sections 108
Using Critical Sections 109
User Scenario 111
Suggested Algorithm 115
Creating Device Properties 117
Creating Property Help 118
IMDF File 133
Hierarchy of IMDF Elements 135
Creating AdaptorHelp Nodes 140
Specifying Device Information 142
Example: Device Node 143
Specifying Format Information 148
Specifying Trigger Sources 151
Specifying Trigger Conditions 151
Specifying Video Sources 152
Testing Adaptors or Hardware 156
defines x offset 162
defines y offset 162
Test Suite Properties 165
Test Suite Functions 166
deviceId2, deviceFormat2) 169
Test Suite Example 170

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