IC_hard soft attention 2

input image

4 candidate blocks of regions for hard attention each corresponds to an object

0.0

average attention weight

2

probability for each region to be focused

compressed featureseach corresponds to a image region

choose the block with largest average attention weight

attention network

0.4

LSTM

H

0.2

CNN

0.3

0.1

mix of 2 region features

hardattention

SSD

block of object 1has the largest possibility

1

3

4

softattention

Y

Z