我在我的Ubuntu机器上安装了Matlab 2018a（linux版本）。我正在尝试计算视频的光流量，其中出现上述错误。 Google搜索表明，这可能是由两个问题造成的，要么使用旧版本的Matlab（如2009），要么可能未安装计算机视觉工具箱。
我有最新版本的Matlab，但仍然遇到此错误，我还安装了所需的工具箱，可以从ver
>> ver
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MATLAB Version: 9.4.0.813654 (R2018a)
MATLAB License Number: 893265
Operating System: Linux 4.13.0-38-generic #43~16.04.1-Ubuntu SMP Wed Mar 14 17:48:43 UTC 2018 x86_64
Java Version: Java 1.8.0_144-b01 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode
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使用命令OpticalFlow计算opticalFlowClass = vision.OpticalFlow('OutputValue', Horizontal and vertical components in complex form', 'Method', 'Horn-Schunck')时出现以下错误：
Undefined variable "vision" or class "vision.OpticalFlow".
Error in Video2OpticalFlow (line 28)
opticalFlowClass = vision.OpticalFlow('OutputValue', ...
有人可以指导我为什么会收到此错误？ 谢谢
答案 0 :(得分：1)
我发现了为什么它不起作用.. vision.OpticalFlow已从最新版本的Matlab中删除，如果使用opticalFlowHS
Horn-Schunck method
更多详细信息：https://uk.mathworks.com/help/vision/ref/opticalflow-class.html