How to change input size of neural network from 3d to 2d?

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Jahandad Baloch
Jahandad Baloch 2018-5-30
评论： Jahandad Baloch 2018-5-31
I have to classify 2d images using googlenet model of Neural Network Toolbox, here the input layer size is 224x224x3 but I need it to classify 224x224x1. How to change the size of input layer and what else would be needed to change after this change in input size?

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回答（1 个）

Majid Farzaneh
Majid Farzaneh 2018-5-30
编辑：Walter Roberson 2018-5-30
Hi,
You can use the gray-scale image instead of RGB image. Use this command to make gray-scale from RGB:
Ig=rgb2gray(I)
Where I is your input image.
Also you can use one of layer of image:
R=I(:,:,1);
or
G=I(:,:,2);
or
B=I(:,:,3);
  1 个评论
Jahandad Baloch
Jahandad Baloch 2018-5-31
Thank you very much Majid and Walter. The problem is, I already have gray-scale 2D images but googlenet model by Neural Network Toolbox accepts data in 3D. Should I introduce third dimension by converting gray-scale to RGB? Wouldn't this extra dimension reduce the performance of algorithm?

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