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Tohru Kikawada


MathWorks

162 total contributions since 2016

Application Engineer
Professional Interests: Signal Processing, Image Processing, Computer Vision, Deep Learning and Robotics

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Answered
rosbagファイルの結合について
残念ながらRobotics System Toolboxは現状でrosbagの書き出しには対応していません。 一方、2つのrosbagを読み出して時系列データとして統合することは可能です。たとえば、timeseriesとして扱う例はこちらにあります。

8 days ago | 0

| accepted

Answered
時変係数行列での微分方程式の解法
非線形の偏微分方程式のようですので下記が参考になるかもしれません。 <https://jp.mathworks.com/help/symbolic/examples/solve-a-partial-differential-equation-tsunam...

2 months ago | 1

| accepted

Answered
イメージラベラーで特定の色の箇所だけ、ラベリングする方法
赤色の部分を抽出してラベル画像化する方法があります。 ご参考になれば幸いです。 %% 画像を保存 imDir = 'images'; [~,~,~] = mkdir(imDir); websave(fullfile(imDir,'image....

2 months ago | 0

| accepted

Answered
SimlinkでFFTを行い,ピーク値を求めたい
DSP System Toolboxをお持ちでないということですとMATLAB Functionブロックと|fft|関数を組み合わせて、ご自身でモデルを作っていただく必要があります。 ご自身で試してみて不明点を質問した方が回答が集まりやすいと思います。

2 months ago | 1

Answered
行列への代入について
線形インデックスを使うのがよいかもしれません。 point=[1 2;2 3;3 2; 1 3]; M=zeros(3,3); M(sub2ind(size(M),point(:,1),point(:,2)))=1; 添字から線...

2 months ago | 2

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Answered
How can I interface CAN_Pack _Unpack with a ROS publisher to generate a standalone ROS node?
Unfortunately, Robotics System Toolbox does not support ROS node generation for models that contain models generating shared lib...

2 months ago | 0

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Answered
Matlab Radar Simulation in Gazebo
If you want to integrate a radar model on Gazebo side, you'll need to write your own SDF file for Gazebo: <http://gazebosim.org...

2 months ago | 0

Answered
Vector transformation from one coordinate system to another
I believe you can do that with the utility functions provided by Robotics System Toolbox like follows. <https://mathworks.com/h...

2 months ago | 0

Answered
Deploying a ROS node on Raspberry Pi in external mode with Simulink
I'd recommend you to try the first path. In the external mode, the deployed model can be running as a ROS node simultaneously li...

2 months ago | 0

Answered
How to link simscape model with a mcode+gui?
The following inverse kinematics block cab be used just for inverse kinematics on Simulink: <https://jp.mathworks.com/help/robo...

2 months ago | 0

Answered
Acquire real-time data from ROS
If you mean acquiring the streaming data through ROS, that's possible using a rossbuscriber in Robotics System Toolbox. Otherwis...

2 months ago | 0

Answered
Convert ROS greyscale image msg in Simulink
Try this Read Image block in Robotics System Toolbox. <https://mathworks.com/help/robotics/ref/readimageblock.html>

2 months ago | 0

Answered
Cannot connect to my Virtual Machine "Ubuntu 14.04" as a ROS device for code generation. Error At "Test" stage under Hardware Implementation for Simulink Coder
You can check the ssh service is running on your Ubuntu with the following command: sudo service ssh restart If the serv...

2 months ago | 0

Answered
Create ROS custom message with a Format 2 package.xml
The ROS message package format 2 is not currently supported. You should still be able to get it to work by changing the line: ...

2 months ago | 0

Answered
Matlab and ROS communication
Security software often blocks the communication between the host and the target enven if the pings are successful. Please make ...

2 months ago | 0

Answered
Create a ROS custom message
You'll need to write the custom ROS messages in a manner before using MATLAB. <http://wiki.ros.org/ROS/Tutorials/CreatingMsgAnd...

2 months ago | 0

Answered
I am not able to read data from the ROS file
You'll need to install custom ROS messages for |rt_msgs.Odom|. See the following link for details: <https://jp.mathworks.com/m...

2 months ago | 0

Answered
How to export PointCloud2 Data from a bagfile with a timestamp?
Reading PointCloud2 messages from rosbag is one of the capabilities of Robotics System Toolbox, so you'll need to introduce the ...

2 months ago | 0

Answered
Question about exporting ROS_HOSTNAME to setup.sh
It depends on your environment, but normally just appending the export command to your .bashrc in your home directory will work....

2 months ago | 0

Answered
Merging Laser Readings into one Topic
The frame_id shoud be published as described in the following documentation. <https://mathworks.com/help/robotics/examples/acce...

2 months ago | 0

Answered
ROS interaction in Matlab R2013b
Unfortunately, there is no way to install Robotics System Toolbox before R2015a release.

2 months ago | 0

Answered
How to publish several topics for a single node?
You'll need to create two publshers corresponding to each topic. Regarding the single node, you can control nodes running on MA...

2 months ago | 0

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Answered
Semantic Segmentation - How many layers to replace in transfer learning?
Did you see |helperDeeplabv3PlusResnet18.m| which is attached to the example as a supporting file? The supporting function might...

2 months ago | 0

Answered
4次元のボリュームデータの重心座標抽出
強度付きのボリュームデータをregionprops3に引数としてあたえると、自動的にバイナリ化されて、領域解析にかけられます。 強度付きボリューム全体の重心を求める際には、バイナリのマスクと強度ボリュームを別々に与えることで実現できます。 ...

2 months ago | 1

| accepted

Answered
Simultaneously inverting many matrices
You can leverage Symbolic Math Toolbox to vectorize the calculation. % Define size of matrices M=2; N=10000; A=rand(M,M,N); ...

2 months ago | 2

Answered
2次元行列演算のSIMD命令による高速化
下記が参考になるかもしれません。 https://jp.mathworks.com/matlabcentral/answers/224361-simultaneously-inverting-many-matrices 基本的には任意のM対して下記を参...

2 months ago | 0

Answered
カラーマーカーを使ったトラッキングの動作について
ファイル内のコメントに沿って作ってみてはいかがでしょう? % 色のしきい値アプリを使ってマスク関数を作成 colorThresholder(frame); % 色空間はHSVを選択 % 緑色のマーカーだけが検出されるようにし...

2 months ago | 1

Answered
既知の姿勢を使用するマッピングについて
はい、原理的には可能と思います。ただ、精度の面では調整は必要です。 下記は3D点群のレジストレーションで地図データを作成しています。 https://jp.mathworks.com/help/vision/examples/3-d-point-clo...

2 months ago | 2

| accepted

Submitted


MATLABによる画像処理・コンピュータービジョン評価キット
MATLABによる画像処理・コンピュータービジョンの機能紹介スライドとデモファイル

2 months ago | 40 downloads |

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