我尝试使用matlab检测图像中的面部。我为此找到了许多演示。所有演示都使用vision.CascadeObjectDetector类。但我的matlab总是抛出异常，即“Undefined variable”vision“或class”vision.CascadeObjectDetector“，甚至试图在命令窗口调用vision类
计算机视觉系统工具箱已经安装。
问题在哪里，我该如何解决？
已安装的工具箱列表;
MATLAB Version 7.13 (R2011b)
Simulink Version 7.8 (R2011b)
Aerospace Blockset Version 3.8 (R2011b)
Aerospace Toolbox Version 2.8 (R2011b)
Bioinformatics Toolbox Version 4.0 (R2011b)
Communications System Toolbox Version 5.1 (R2011b)
Computer Vision System Toolbox Version 4.1 (R2011b)
Control System Toolbox Version 9.2 (R2011b)
Curve Fitting Toolbox Version 3.2 (R2011b)
DO Qualification Kit Version 1.5 (R2011b)
DSP System Toolbox Version 8.1 (R2011b)
Data Acquisition Toolbox Version 3.0 (R2011b)
Database Toolbox Version 3.10 (R2011b)
Datafeed Toolbox Version 4.2 (R2011b)
EDA Simulator Link Version 3.4 (R2011b)
Econometrics Toolbox Version 2.0.1 (R2011b)
Embedded Coder Version 6.1 (R2011b)
Filter Design HDL Coder Version 2.9 (R2011b)
Financial Derivatives Toolbox Version 5.8 (R2011b)
Financial Toolbox Version 4.1 (R2011b)
Fixed-Income Toolbox Version 2.2 (R2011b)
Fixed-Point Toolbox Version 3.4 (R2011b)
Fuzzy Logic Toolbox Version 2.2.14 (R2011b)
Global Optimization Toolbox Version 3.2 (R2011b)
IEC Certification Kit Version 2.0 (R2011b)
Image Acquisition Toolbox Version 4.2 (R2011b)
Image Processing Toolbox Version 7.3 (R2011b)
Instrument Control Toolbox Version 3.0 (R2011b)
MATLAB Builder EX Version 2.1 (R2011b)
MATLAB Builder JA Version 2.2.3 (R2011b)
MATLAB Builder NE Version 4.1 (R2011b)
MATLAB Coder Version 2.1 (R2011b)
MATLAB Compiler Version 4.16 (R2011b)
MATLAB Distributed Computing Server Version 5.2 (R2011b)
MATLAB Report Generator Version 3.11 (R2011b)
Mapping Toolbox Version 3.4 (R2011b)
Model Predictive Control Toolbox Version 4.0 (R2011b)
Model-Based Calibration Toolbox Version 4.3 (R2011b)
Neural Network Toolbox Version 7.0.2 (R2011b)
OPC Toolbox Version 3.1 (R2011b)
Optimization Toolbox Version 6.1 (R2011b)
Parallel Computing Toolbox Version 5.2 (R2011b)
Partial Differential Equation Toolbox Version 1.0.19 (R2011b)
Phased Array System Toolbox Version 1.1 (R2011b)
RF Toolbox Version 2.9 (R2011b)
Robust Control Toolbox Version 4.0 (R2011b)
Signal Processing Toolbox Version 6.16 (R2011b)
SimBiology Version 4.0 (R2011b)
SimDriveline Version 2.1 (R2011b)
SimElectronics Version 2.0 (R2011b)
SimEvents Version 4.0 (R2011b)
SimHydraulics Version 1.10 (R2011b)
SimMechanics Version 3.2.3 (R2011b)
SimPowerSystems Version 5.5 (R2011b)
SimRF Version 3.1 (R2011b)
Simscape Version 3.6 (R2011b)
Simulink 3D Animation Version 6.0 (R2011b)
Simulink Code Inspector Version 1.0 (R2011b)
Simulink Coder Version 8.1 (R2011b)
Simulink Control Design Version 3.4 (R2011b)
Simulink Design Optimization Version 2.0 (R2011b)
Simulink Design Verifier Version 2.1 (R2011b)
Simulink Fixed Point Version 7.0 (R2011b)
Simulink HDL Coder Version 2.2 (R2011b)
Simulink PLC Coder Version 1.2.1 (R2011b)
Simulink Report Generator Version 3.11 (R2011b)
Simulink Verification and Validation Version 3.2 (R2011b)
Spreadsheet Link EX Version 3.1.4 (R2011b)
Stateflow Version 7.8 (R2011b)
Statistics Toolbox Version 7.6 (R2011b)
Symbolic Math Toolbox Version 5.7 (R2011b)
System Identification Toolbox Version 7.4.3 (R2011b)
SystemTest Version 2.6.2 (R2011b)
Vehicle Network Toolbox Version 1.5 (R2011b)
Wavelet Toolbox Version 4.8 (R2011b)
xPC Target Version 5.1 (R2011b)
xPC Target Embedded Option Version 5.1 (R2011b)
答案 0 :(得分：2)
此错误强烈指向未安装的计算机视觉系统工具箱。
要确保已安装，请在Matlab命令提示符下键入ver。对我来说，这输出：
>> ver
-------------------------------------------------------------------------------------------------------
MATLAB Version: 8.0.0.783 (R2012b)
MATLAB License Number: xxxxxx (edited out)
Operating System: Linux 2.6.35-32-generic #67-Ubuntu SMP Mon Mar 5 19:39:49 UTC 2012 x86_64
Java Version: Java 1.6.0_26-b03 with Sun Microsystems Inc. Java HotSpot(TM) 64-Bit Server VM mixed mode
-------------------------------------------------------------------------------------------------------
MATLAB Version 8.0 (R2012b)
Simulink Version 8.0 (R2012b)
Curve Fitting Toolbox Version 3.3 (R2012b)
Fuzzy Logic Toolbox Version 2.2.16 (R2012b)
Global Optimization Toolbox Version 3.2.2 (R2012b)
Image Acquisition Toolbox Version 4.4 (R2012b)
Image Processing Toolbox Version 8.1 (R2012b)
M2HTML Toolbox - A Documentation Generator for ... Version 1.5
MATLAB Coder Version 2.3 (R2012b)
MATLAB Compiler Version 4.18 (R2012b)
Mapping Toolbox Version 3.6 (R2012b)
Neural Network Toolbox Version 8.0 (R2012b)
Optimization Toolbox Version 6.2.1 (R2012b)
Parallel Computing Toolbox Version 6.1 (R2012b)
Partial Differential Equation Toolbox Version 1.1 (R2012b)
Signal Processing Toolbox Version 6.18 (R2012b)
Statistics Toolbox Version 8.1 (R2012b)
Symbolic Math Toolbox Version 5.9 (R2012b)
System Identification Toolbox Version 8.1 (R2012b)
Wavelet Toolbox Version 4.10 (R2012b)
如您所见，我不安装了此工具箱。你呢？
答案 1 :(得分：2)
我不认为vision.CascadeObjectDetector在R2011b中可用。它可以从R2012a获得。您运行的演示是否提到了任何最低版本要求？