neural-art | Recreate photos in the style of famous artists | Machine Learning library
kandi X-RAY | neural-art Summary
kandi X-RAY | neural-art Summary
Recreate photos in the style of famous artists with neural networks
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Top functions reviewed by kandi - BETA
- Calculate the loss and gradient of the network .
- Main function .
- Set the style targets for each image .
- Scrape artists .
- Return the total number of pages .
- Saves a picture to a directory .
- Clean the painting URL .
- Check if request object is bad .
- Print a debug message .
neural-art Key Features
neural-art Examples and Code Snippets
def ascii(state, highlight, cycle=None):
IP, IS, R0, R1, memory = state
center = []
for (i, s) in enumerate((IP, IS, R0, R1, *memory)):
if i - 4 in highlight:
s = "_" + str(s) + "_"
center.append(str(s).center
Community Discussions
Trending Discussions on neural-art
QUESTION
I am currently getting familiar with TensorFlow and machine learning. I am doing some tutorials on style transfer and now I have a part of an example code that I somehow can not comprehend.
I think I get the main idea: there are three images, the content image, the style image and the mixed image. Let's just talk about the content loss first, because if I can understand that, I will also understand the style loss. So I have the content image and the mixed image (starting from some distribution with some noise), and the VGG16 model.
As far as I can understand, I should now feed the content image into the network to some layer, and see what is the output (feature map) of that layer for the content image input.
After that I also should feed the network with the mixed image to the same layer as before, and see what is the output (feature map) of that layer for the mixed image input.
I then should calculate the loss function from these two output, because I would like the mixed image to have a similar feature map to the content image.
My problem is that I do not understand how this is done in the example codes that I could find online.
The example code can be the following: http://gcucurull.github.io/tensorflow/style-transfer/2016/08/18/neural-art-tf/
But nearly all of the examples used the same approach.
The content loss is defined like this:
...ANSWER
Answered 2019-Apr-08 at 11:42The loss forces the networks to have similar activation on the layer you have chosen.
Let us call one convolutional map/pixel from target_out[layer]
and corresponding map from cont_out
. You want their difference to be as small as possible, i.e., the absolute value of their difference. For the sake of numerical stability, we use the square function instead of absolute value because it is a smooth function and more tolerant of small errors.
We thus get , which is: tf.square(tf.sub(target_out[layer], cont_out))
.
Finally, we want to minimize the difference for each map and each example in the batch. This is why we sum all the difference into a single scalar using tf.reduce_sum
.
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
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Install neural-art
You can use neural-art like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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