I need help on cell array and Imaging processing

Question

Abdussalam Elhanashi 2020-10-26

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/625958-i-need-help-on-cell-array-and-imaging-processing

评论： Walter Roberson 2020-10-27

采纳的回答： drummer

在 MATLAB Online 中打开

Hi

I am using the following code

close all;
clc; 
 
%%  Initalize the data 
 
dataDir= fullfile('Data/');
exts = {'.jpg','.png','.tif','BMP'};
 
 
imds = imageDatastore(fullfile(dataDir),...
'IncludeSubfolders',true,'FileExtensions','.jpg','LabelSource','foldernames');
countEachLabel(imds);
 
[TrainData, TestData] = splitEachLabel(imds, 0.5);
size(TrainData);
countEachLabel(TrainData);
numImages = numel(TrainData.Files); 
for i = 1:numImages
    img = readimage(TrainData, i);
%     img2= imshow(img, 'InitialMagnification', 800);
    img3= imresize(img, [100 100]);
    img4= imshow(img3, 'InitialMagnification', 800);
     drawnow;
    Train{i} = (img3);         %#ok<SAGROW>
 
end
hiddenSize = 25;
autoenc = trainAutoencoder(Train,hiddenSize,'MaxEpochs',1000,...
'DecoderTransferFunction','purelin','EncoderTransferFunction','satlin','L2WeightRegularization',0.0004,'SparsityRegularization',4,'SparsityProportion',0.15);
 
numImages = numel(TestData.Files); 
for i = 1:numImages
    img5 = readimage(TestData, i);
    img6= imresize(img, [100 100]);
    img7= imshow(img3, 'InitialMagnification', 800);
     drawnow;
    Test{i} = (img6);      %#ok<SAGROW>
end
xReconstructed = predict(autoenc,Test);
%% Test Images 
figure();
for i = 1:10
    subplot(4,5,i);
    imshow(TestData.Files{i});
end
 
%% Reconstructed images from TestData
figure();
for i = 1:10
    subplot(4,5,i);
    imshow(xReconstructed(i))
end

But I got the following error

Error using imageDisplayValidateParams
Expected input number 1, I, to be one of these types:
 
double, single, uint8, uint16, uint32, uint64, int8, int16, int32, int64, logical
 
Instead its type was cell.
 
Error in images.internal.imageDisplayValidateParams (line 11)
validateattributes(common_args.CData, {'numeric','logical'},...
 
Error in images.internal.imageDisplayParseInputs (line 79)
common_args = images.internal.imageDisplayValidateParams(common_args);
 
Error in imshow (line 253)
    images.internal.imageDisplayParseInputs({'Parent','Border','Reduce'},preparsed_varargin{:});
 
Error in data_process1 (line 51)
    imshow(xReconstructed(i))

When I compare to the example,

https://www.mathworks.com/help/deeplearning/ref/trainautoencoder.html

the issue is with Train{i}and Test {i}, The model is not trained probably with given data. When I compared with example in MATLAB for digitTrainCellArrayData and digitTTestCellArrayData I am having problems and my cell array which are not the same as in example

My cell arrays for Train{i}and Test {i} are like this like for example Train{i}

But in the example in MATLAB for digits, digitTrainCellArrayData and digitTestCellArrayData are like this

digitTrainCellArrayData

In addition to that. Range in example is from 0 – 1 while my data is from 0 – 255

Kindly looking for your support

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

drummer 2020-10-26

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/625958-i-need-help-on-cell-array-and-imaging-processing#answer_524573

在 MATLAB Online 中打开

figure();
for i = 1:10
    subplot(4,5,i);
    imshow(TestData.Files{i});
end

Hi.

It's probably your argument for imshow that is cell type, while it only accepts the type mentioned in your error message.

Try this workaround

figure();
for i = 1:10
    subplot(4,5,i);
    image = cell2mat(TestData.Files{i});
    imshow(image);
end

I haven't tested, so before performing within the loop, try outside, with a single image.

Cheers

15 个评论
显示 13更早的评论隐藏 13更早的评论

Abdussalam Elhanashi 2020-10-26

在 MATLAB Online 中打开

Hi Walter

I am using the following code

close all;
clc; 
 
%%  Initalize the data 
 
dataDir= fullfile('Data/');
exts = {'.jpg','.png','.tif','BMP'};
 
 
imds = imageDatastore(fullfile(dataDir),...
'IncludeSubfolders',true,'FileExtensions','.jpg','LabelSource','foldernames');
countEachLabel(imds);
 
[TrainData, TestData] = splitEachLabel(imds, 0.5);
size(TrainData);
countEachLabel(TrainData);
numImages = numel(TrainData.Files); 
for i = 1:numImages
    img = readimage(TrainData, i);
%     img2= imshow(img, 'InitialMagnification', 800);
    img3= imresize(img, [100 100]);
    img4= imshow(img3, 'InitialMagnification', 800);
     drawnow;
    Train{i} = (img3);         %#ok<SAGROW>
 
end
hiddenSize = 25;
autoenc = trainAutoencoder(Train,hiddenSize,'MaxEpochs',1000,...
'DecoderTransferFunction','purelin','EncoderTransferFunction','satlin','L2WeightRegularization',0.0004,'SparsityRegularization',4,'SparsityProportion',0.15);
 
numImages = numel(TestData.Files); 
for i = 1:numImages
    img5 = readimage(TestData, i);
    img6= imresize(img, [100 100]);
    img7= imshow(img3, 'InitialMagnification', 800);
     drawnow;
    Test{i} = (img6);      %#ok<SAGROW>
end
xReconstructed = predict(autoenc,Test);
%% Test Images 
figure();
for i = 1:10
    subplot(4,5,i);
    imshow(TestData.Files{i});
end
 
%% Reconstructed images from TestData
figure();
for i = 1:10
    subplot(4,5,i);
    imshow(xReconstructed(i))
end

But I got the following error

Error using imageDisplayValidateParams
Expected input number 1, I, to be one of these types:
 
double, single, uint8, uint16, uint32, uint64, int8, int16, int32, int64, logical
 
Instead its type was cell.
 
Error in images.internal.imageDisplayValidateParams (line 11)
validateattributes(common_args.CData, {'numeric','logical'},...
 
Error in images.internal.imageDisplayParseInputs (line 79)
common_args = images.internal.imageDisplayValidateParams(common_args);
 
Error in imshow (line 253)
    images.internal.imageDisplayParseInputs({'Parent','Border','Reduce'},preparsed_varargin{:});
 
Error in data_process1 (line 51)
    imshow(xReconstructed(i))

When I compare to the example,

https://www.mathworks.com/help/deeplearning/ref/trainautoencoder.html

the issue is with Train{i}and Test {i}, The model is not trained probably with given data. When I compared with example in MATLAB for digitTrainCellArrayData and digitTTestCellArrayData I am having problems and my cell array which are not the same as in example

My cell arrays for Train{i}and Test {i} are like this like for example Train{i}

But in the example in MATLAB for digits, digitTrainCellArrayData and digitTestCellArrayData are like this

digitTrainCellArrayData

In addition to that. Range in example is from 0 – 1 while my data is from 0 – 255

Kindly looking for your support

Abdussalam Elhanashi 2020-10-27

在 MATLAB Online 中打开

Hi walter I tried this but i got error

reconstructed(imbinarize(xReconstructed)) = 1;
Error using imbinarize
Expected I to be one of these types:
uint8, uint16, uint32, int8, int16, int32, single, double
Instead its type was cell.
Error in imbinarize>validateImage (line 262)
validateattributes(I,supportedClasses,supportedAttribs,mfilename,'I');
Error in imbinarize>parseInputs (line 198)
validateImage(I);
Error in imbinarize (line 134)
[I,isNumericThreshold,options] = parseInputs(I,varargin{:});

Walter Roberson 2020-10-27

在 MATLAB Online 中打开

       reconstructed = xReconstructed{i};
       reconstructed(imbinarize(reconstructed)) = 1;
       imshow(reconstructed)

请先登录，再进行评论。

I need help on cell array and Imaging processing

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

采纳的回答

15 个评论
显示 13更早的评论隐藏 13更早的评论

更多回答（0 个）

另请参阅

类别

标签

Community Treasure Hunt

I need help on cell array and Imaging processing

0 个评论 显示 -2更早的评论隐藏 -2更早的评论

采纳的回答

15 个评论 显示 13更早的评论隐藏 13更早的评论

更多回答（0 个）

另请参阅

类别

标签

Community Treasure Hunt

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

15 个评论
显示 13更早的评论隐藏 13更早的评论