Question about preprocessing
Hakuyume opened this issue · comments
A parameter of preprocessing seems different from the TensorFlow version.
In this Keras implementation, you subtract 1.0 from the image (https://github.com/kentsommer/keras-inceptionV4/blob/master/evaluate_image.py#L11).
On the other hand, in the TensorFlow implementation, they subtract 0.5 (https://github.com/tensorflow/models/blob/master/slim/preprocessing/inception_preprocessing.py#L273).
Why did you change this value?
I originally had left that value at 0.5, however, when I started crunching the performance numbers I noticed that performance increased somewhat if I used 1.0 instead. I'm not 100% sure why that would be the case, however, since I used it to achieve the performance metrics listed (which match the metrics here) I left the value at 1.0 for this release.
Thank you for your quick response!