How to create a database of feature vectors for images?

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Elias Unk 2017-6-18

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评论： Elias Unk 2017-6-19

I have a database of around 4 classes each consistent of around 50 images.I created a features vector on matlab to extract the features i need from each image.My question is how to create the database of vectors for all the images to then train them per class .

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KSSV 2017-6-19

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https://ww2.mathworks.cn/matlabcentral/answers/345242-how-to-create-a-database-of-feature-vectors-for-images#answer_271101

在 MATLAB Online 中打开

N = 50 ;  % number of fimages 
C = 4 ; % number of classes 
%%loop for each image 
iwant = cell(N,C) ;
for i = 1:N
    %%Extract the features of images,
    iwant{i,1} = rand(10) ;
    iwant{i,2} = rand(5) ;
    iwant{i,3} = rand(6) ;
    iwant{i,4} = rand(11) ;
end
%%Rows corresponds to each image, and columns correspon to each class of the respective image

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KSSV 2017-6-19

If vec1,vec2, vec3 and vec4 are your feature vectors for image 1. Use: iwant{i,1} = vec1 ; iwant{i,2} = vec2 ; iwant{i,3} = vec3 ; iwant{i,4} = vec4; end

Elias Unk 2017-6-19

nope i have 1 feature vector of 110 elements i just combined all the features extraction in 1 final vector so that each image will have only 1 vector extracted of it formed of 110 elements that i then normalized and transformed to 1 element,hope that made you better understand the issue.

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