Compact Bilinear Pooling for PyTorch.

This repository has a pure Python implementation of Compact Bilinear Pooling and Count Sketch for PyTorch.

It depends on the FFT implementation of pytorch_fft. pytorch_fft can be installed either from source or from Pypi using pip install pytorch_fft.

Usage

class compact_bilinear_pooling.CompactBilinearPooling(input1_size, input2_size, output_size, h1 = None, s1 = None, h2 = None, s2 = None)

Basic usage:

from torch.autograd import Variable
from compact_bilinear_pooling import CountSketch, CompactBilinearPooling

input_size = 2048
output_size = 16000
mcb = CompactBilinearPooling(input_size, input_size, output_size).cuda()
x = torch.autograd.Variable(torch.rand(4,input_size).cuda())
y = torch.autograd.Variable(torch.rand(4,input_size).cuda())

z = mcb(x,y)

Test

A couple of test of the implementation of Compact Bilinear Pooling and its gradient can be run using:

python test.py

References

• Yang Gao et al. "Compact Bilinear Pooling" in Proceedings of IEEE Conference on Computer Vision and Pattern Recognition", 2016
• Akira Fukui et al. "Multimodal Compact Bilinear Pooling for Visual Question Answering and Visual Grounding", 2016