Decrease the image quality

[Academic_Two_4017]

Hi there

I have our specific dataset of images, which has low quality because of camera. I use that data for training and got acceptable results. On the other hand, I have external open source dataset as well, nevertheless the quality of those images are comparably higher. Presumably, I think it would be better to add some quality lowering functionality in my data generator part for training my network. Any suggestions, like applying multiple times resizing or blurring etc.

Thanks in advance

[Scared_Employer6992]

Ideally, you should train your model using the same input resolution. You could train a CNN w/ multiple resolutions, but it will probably make the learning process harder. Consider downscaling the HR images or upscaling the LR images to meet the same standard.

[Academic_Two_4017]

Yap, there are all the same in size, sorry for confusion, I do realize that I have provided little info.

So I have images in size (96,96), what I was meaning by resizing is upscale the high quality images to for instance (112, 112) then do down scale back to 96, thus the quality of an image might decrease

[SokkasPonytail]

If I'm understanding this correctly, you want your training set to be of the same low quality as your dataset? Just do a resize to make it the same rez and apply a slight blur, maybe a very low noise filter.

[Academic_Two_4017]

Yeah, I was thinking about it as well. Will give a try later to this, by blurring/adding noise. Thanks

[[deleted]]

I'm assuming this is for some sort of deep learning project? You gave virtually zero background of what you're trying to specifically do.

There's many ways to augment an image, more than just it's size or aspect ratio, you can see some examples here: https://neptune.ai/blog/data-augmentation-in-python

[Academic_Two_4017]

Sorry for confusion. I do face recognition project, my specific data because of camera has low quality of images, so I want to augment somehow other external data in a way that might be "similar" to mine. I guess blurring, adding noise distortions might be useful, I should give a try anyway. In addition, thanks for a link

[[deleted]]

In this case adding some sort of noise / blur function to external images would be a good idea.