fix grey image output in vae_mnist #1
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Without this, the autoencoder example fails on the last line.
Add ImageIO dependency required for autoencoder example
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In vae_plot.jl the sigmoid needs to be applied to the sampled output from the decoder. Otherwise, the generated image
output/manifold.pngis corrupted.The error was caused by the commits in FluxML#267 that removed the sigmoid from the last decoder layer to enable the use of the more numerically stable logitbinarycrossentropy loss. However, only the output in vae_mnist.jl was adapted. The output in
vae_plot.jlwas not adapted.