R-CNN stop sign detector code

I am trying understand the code for stop sign detector using cnn but i do no identify the "Command" in below sentencie of the program: "helperCIFAR10Data.download(url,cifar10Data); I look for help but it shows an error msg

[douadi alim]

Hello, I had the same issue for using this class "helperCIFAR10Data" on Matlab R2015b. After trying [fullfile(toolboxdir('vision'),'visiondemos','helperCIFAR10Data.m'] I found may other classes in Matlab root but not that one. So if you found any solution, please help.

[Walter Roberson]

That code requires R2016b or later.

[Vrushal]

I have R2015a and wrote this code:

It's showing too many output arguments.I need to extract trainingimages,traininglabels,etc. Help me with it.

[Walter Roberson]

Your S is a structure array of loaded data. You should be extracting fields from it, not trying to load() it. For example, if each .mat file has a variable named "trainingImages" then

trainingImages = cat(4, S.trainingImages);

[Vrushal]

It's showing error of reference to non-existent field "trainingImages" but in R2017a they were able to extract each label by using:

    [trainingImages, trainingLabels, testImages, testLabels] = helperCIFAR10Data.load(cifar10Data);

I need to do same in R2015a...please help me with it

[Vrushal]

@walter robinson

[Walter Roberson]

Please show the output of

whos -file data_batch_1.mat
whos -file data_batch_2.mat
whos -file data_batch_3.mat
whos -file data_batch_4.mat
whos -file data_batch_5.mat

[Jun Zhang]

I have the same problem.

>> whos -file data_batch_1.mat

whos -file data_batch_2.mat

whos -file data_batch_3.mat

whos -file data_batch_4.mat

whos -file data_batch_5.mat

Name Size Bytes Class Attributes

batch_label 1x21 42 char

data 10000x3072 30720000 uint8

labels 10000x1 10000 uint8

Name Size Bytes Class Attributes

batch_label 1x21 42 char

data 10000x3072 30720000 uint8

labels 10000x1 10000 uint8

Name Size Bytes Class Attributes

batch_label 1x21 42 char

data 10000x3072 30720000 uint8

labels 10000x1 10000 uint8

Name Size Bytes Class Attributes

batch_label 1x21 42 char

data 10000x3072 30720000 uint8

labels 10000x1 10000 uint8

Name Size Bytes Class Attributes

batch_label 1x21 42 char

data 10000x3072 30720000 uint8

labels 10000x1 10000 uint8

[Walter Roberson]

Could you clarify what problem you are having? Please post your code.

Answer 1

[Walter Roberson]

That code requires R2016b or later.

[Euseb Martinez]

Yes Sir Tks! I did the download from Matlab trial (I assume is the most updated version) even I did all row comment (% sign in the beginning of the sentence) and the code runs with no error msg! That's the reason of my question, I do not understand what this sentence means or what it doing in the code sequence.

[Walter Roberson]

type(fullfile(toolboxdir('vision'),'visiondemos','helperCIFAR10Data.m'))

% This is helper class to download and import the CIFAR-10 dataset. The
% dataset is downloaded from:
%
%  https://www.cs.toronto.edu/~kriz/cifar-10-matlab.tar.gz
%
% References
% ----------
% Krizhevsky, Alex, and Geoffrey Hinton. "Learning multiple layers of
% features from tiny images." (2009).

[Euseb Martinez]

Tks so much Sir!.... now I know the meaning of sentence. I will try to understand the complete code. Tks again. Euseb

[ahmed SHAH]

when i resolve the above issure using

 fullfile( fullfile('C:\Users\hexroot\Desktop\people detection\cifar-10-matlab\cifar-10-batches-mat'))

its creates are ans named variable in workspace...... when i execute the second line

[trainingImages, trainingLabels, testImages, testLabels] = helperCIFAR10Data.load(cifar-10-batches-mat);

its show an error undefined variable cifar.. and can i use this example to detect cars and people also thanks in advance and what database will be good for detecting car people and stop signs..

[ahmed SHAH]

@walter robinson

[Walter Roberson]

location = 'C:\Users\hexroot\Desktop\people detection\cifar-10-matlab';
[trainingImages, trainingLabels, testImages, testLabels] = helperCIFAR10Data.load(location);

[Swati Prakash]

I have installed MATLAB 2020 but also it is giving error

Unable to resolve the name helperCIFAR10Data.load.

I have given the fullpath

addpath(['D','/examples','/deeplearning_shared','/main']);

location = 'D:\examples\deeplearning_shared\main\helperCIFAR10Data.m';

[trainingImages, trainingLabels, testImages, testLabels] = helperCIFAR10Data.load(location);

[Walter Roberson]

These days,

fullfile(matlabroot,'examples','deeplearning_shared','main', 'helperCIFAR10Data.m')

Answer 2

[Vignesh Ganapathiraman]

Or you can just add the path at the start

addpath([matlabroot,'/examples','/vision','/main']);

[Zekun]

Great! This solved my problem!~ Thanks!

Answer 3

[Ali]

Hi guys,

The file is really at the directory provided by Walter Roberson, however the error message still there.

to overcome this problem, you may follow these steps:

1. go to fullfile(matlabroot,'examples', 'vision', 'main', helperCIFAR10Data.m', find the file there and open it.
2. inside 'helperCIFAR10Data.m' you will find 4 functions (download,load, loadBatchAsFourDimensionalArray, convertLabelsToCategorical). Copy each function to a new script and save them. you can give 'load' function to another name to avoid conflict with the same Matlab-builtin function.
3. use the code provided on Mathworks website but remove the prefix'helperCIFAR10Data'

% Download CIFAR-10 data to a temporary directory
location = 'C:\Users\JICA\Desktop\Object Detection Using Deep Learning\';
url = 'https://www.cs.toronto.edu/~kriz/cifar-10-matlab.tar.gz';
download(url, location);

%%Load
% Load the CIFAR-10 training and test data.
[trainingImages, trainingLabels, testImages, testLabels] = Dataloading(location);

Each image is a 32x32 RGB image and there are 50,000 training samples.

size(trainingImages)

hope this helps

Ali

[sheeza rafaqat]

how can i goto fullfile(matlabroot,'examples', 'vision', 'main', helperCIFAR10Data')

[Walter Roberson]

cd(fullfile(matlabroot,'examples', 'vision', 'main'))
edit helperCIFAR10Data.m

[sheeza rafaqat]

when i am copying each function in a seperate script it is giving an error of "Not enough arguments in function". how can i resolve this issue?

[bhanu prakash]

when i am copying each function in a seperate script it is giving an error of "Not enough arguments in function". how can i resolve this issue?

[Walter Roberson]

Please show which function you are calling, and show how you are calling it.

Did you follow Ali's suggestion to rename load ? That would include changing the references to the function so that you do not accidentally invoke MATLAB's built-in load()

Answer 4

[巴山学长]

Just copy the 'helperCIFAR10Data.m' to your temporary directory, and then run. Good luck!

Answer 5

[Saif Hussein]

when l was to run the code in https://uk.mathworks.com/help/vision/examples/object-detection-using-deep-learning.html . l have that error below

Undefined variable "helperCIFAR10Data" or class "helperCIFAR10Data.load".

l have email the matlab team many times, they didn't solve the problem. l do believe the problem with matlab copy under Mac,

[Walter Roberson]

Which MATLAB release are you using?

[Donnie Agema]

I am using MATLAB version R2017b and getting the same error. Any solution?

[Walter Roberson]

In R2017b I find it at

fullfile(matlabroot,'examples', 'vision', 'main', 'helperCIFAR10Data.m')

This requires the Computer Vision toolbox.

Answer 6

[Nicola Gaburro]

I'm having the same issue with Matlab R2017b When running the command

helperCIFAR10Data.download(url, cifar10Data);

it shows the error

Undefined variable "helperCIFAR10Data" or class "helperCIFAR10Data.download". Seems like helperCIFAR10Data class is missing

[Walter Roberson]

In R2017b I find it at

fullfile(matlabroot,'examples', 'vision', 'main', 'helperCIFAR10Data.m')

This requires the Computer Vision toolbox.

[Walter Roberson]

By R2018b it has moved to

fullfile(matlabroot,'examples', 'nnet', 'main', 'helperCIFAR10Data.m')

[Dora Craba]

what is the correct code for matlab2019b?

[Walter Roberson]

fullfile(matlabroot,'examples','deeplearning_shared','main','helperCIFAR10Data.m')

[Dora Craba]

Thank you for your answer. Now I get another error:

Unable to resolve the name helperCIFAR10Data.load.

Error in prova_dataset (line 9)

[trainingImages,trainingLabels,testImages,testLabels] = helperCIFAR10Data.load(cifar10Data);

[Walter Roberson]

The helperCIFAR10Data class must be on your MATLAB path.

addpath(fullfile(matlabroot,'examples','deeplearning_shared','main'))