how to find size of image compressed by principal component analysis??
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azizullah khan
el 17 de Feb. de 2014
Comentada: azizullah khan
el 19 de Feb. de 2014
i have compressed images/data by PCA,now i want to find size of the image that i have compressed by PCA????
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Image Analyst
el 17 de Feb. de 2014
Each PC image will be the same number of rows and columns, though each pixel might be as many as 8 bytes instead of 1 if you're getting double arrays out and starting with uint8. So it may not be compressed at all. Anyway, it would depend on how many PC components there are. There could be 1, 2, 3, 4, 5, or whatever. How many are you calculating and keeping?
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Image Analyst
el 18 de Feb. de 2014
The eigen images are computed just once for all images you want to model. Then for each image, you just need to save the weights applied to each eigenface image. So compression is happening because you're just saving a 1D vector of weights, not all the images. If you're taking 50 eigen images, then each image only needs to save 50 numbers. The eigen images themselves are not considered when you compute compression because they are just the same set of permanent images for all images you want to synthesize.
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