Dose anyone can help with PCA technique

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Noor Abbas
Noor Abbas 2017-11-22
评论： Image Analyst 2017-11-27
How can PCA code reduce the dimension of image, if I have image with 128*128, after used PCA to compress image?

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Image Analyst
Image Analyst 2017-11-22
Attached is a demo where I use it.
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Image Analyst
Image Analyst 2017-11-27
Like what are your distinguishing attributes? You can't have just one - the gray level - you need more than 1. Like when I did it in the demo for a color image we had 3 - the red value,the green value, and the blue value. You can't just take one measurement and do PCA. Like if you had the heights of your classmates, you can't just say "I want to do PCA on the list of heights" - it doesn't make sense. Just like you can't say "I want to do PCA on the gray levels". If you don't even know what your features are, then why do you think that PCA is the approach you want to use??? Are you just wanting to write a compressed image, like in JPG or PNG format or something?

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