Questions tagged [wasserstein-gan]
For questions related to the Wasserstein GAN, introduced in "Wasserstein Generative Adversarial Networks" (2017, PMLR) by Martin Arjovsky et al.
14
questions
2
votes
1
answer
66
views
What is being optimized with WGAN loss? Is the generator maximizing or minimizing the critic value?
I am kind of new to the field of GANs and decided to develop a WGAN. All of the information online seems to be kind of contradicting itself. The more I read, the more I become confused, so I'm hoping ...
0
votes
0
answers
24
views
Finer control over the distribution of output from a GAN
I have cast some data into an image (25 x 56) to work better with existing tools, and then used a CNN to train a GAN using the Wasserstein loss with gradient penalty to generate new samples of the ...
- 1
2
votes
1
answer
86
views
Why do we use a linear interpolation of fake and real data to penalize the gradient of discriminator in WGAN-GP
I'm trying to better frame/summarize the formulations and motivations behind Wasserstein GAN with gradient penalty, based on my understanding.
For the basic GAN we are trying to optimize the following ...
- 197
0
votes
0
answers
50
views
Possible improvements to WGAN-GP output images
I am mapping rather complex data into what essentially amounts to a greyscale image to take better advantage of GANs for generative means. Here is an example of some real data:
All real data is of ...
- 1
0
votes
1
answer
183
views
How to calculate the gradient penalty proposed in "Improved Training of Wasserstein GANs"?
The research paper titled Improved Training of Wasserstein GANs proposed a gradient penalty in order to avoid undesired behavior due to weight clipping of the discriminator.
We now propose an ...
- 3,099
0
votes
1
answer
233
views
What to do with a GAN that trained well but got worse over time?
I am training a WGAN-GP network based on the following paper, though I am using a different dataset. Now, for the first ~ 60-70 epochs, my network trained really well, which I could see in the loss ...
- 171
1
vote
0
answers
37
views
How can I estimate the minimum number of training samples needed to get interesting results with WGAN?
Let's say we have a WGAN where the generator and critic have 8 layers and 5 million parameters each. I know that the greater the number of training samples the better, but is there a way to know the ...
2
votes
1
answer
63
views
Classifying generated samples with Wasserstein-GAN as real or fake
I'm quite new to GANs and I am trying to use a Wasserstein GAN as an augmentation technique. I found this article
https://www.sciencedirect.com/science/article/pii/S2095809918301127,
and would like to ...
- 21
2
votes
1
answer
136
views
Aren't scores in the Wasserstein GAN probabilities?
I am quite new to GAN and I am reading about WGAN vs DCGAN.
Relating to the Wasserstein GAN (WGAN), I read here
Instead of using a discriminator to classify or predict the probability of generated ...
- 183
5
votes
0
answers
505
views
Wasserstein GAN: Implemention of Critic Loss Correct?
The WGAN paper concretely proposes Algorithm 1 (cf. page 8). Now, they also state what their loss for the critic and the generator is.
When implementing the critic loss (so lines 5 and 6 of Algorithm ...
- 171
1
vote
0
answers
65
views
WGAN-GP Loss formalization
I have to write the formalization of the loss function of my network, built following the WGAN-GP model. The discriminator takes 3 consecutive images as input (such as 3 consecutive frames of a video) ...
- 11
3
votes
1
answer
273
views
What is the reason for mode collapse in GAN as opposed to WGAN?
In this article I am reading:
$D_{KL}$ gives us inifity when two distributions are disjoint. The value of $D_{JS}$ has sudden jump, not differentiable at $\theta=0$. Only Wasserstein metric provides ...
- 131
1
vote
0
answers
38
views
Under what conditions can one find the optimal critic in WGAN?
The Kantorovich-Rubinstein duality for the optimal transport problem implies that the Wasserstein distance between two distributions $\mu_1$ and $\mu_2$ can be computed as (equation 2 in section 3 in ...
- 41
1
vote
0
answers
24
views
Wasserstein GAN with non-negative weights in the critic
I want to train a WGAN where the convolution layers in the critic are only allowed to have non-negative weights (for a technical reason). The biases, nonetheless, can take both +/- values. There is no ...
- 41