Trade off between losses?

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I have been working on a super-resolution task. I have this question about determining loss function, So in the case of the task at hand I felt like going with SSIM as a loss function to train my model. I did get a good set of results. Recently I come across perceptual loss function where we compare how a pretrained model looks at the Ground truth(GT) Images and the Super Resolution(SR) Image(Image generated by the model). My question is, I am thinking of using both ((1-SSIM(SR,GT))+Perceptual loss(SR,GT)) loss for backpropagation, so should I use a trade-off parameter between these two losses? if so how can I set up these trade-off parameters? or should I add these losses with equal weights.

PS: the perceptual loss is calculated by finding SSIMs between the feature maps of GT and SR images from the pre-trained model

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