Figure 4
From: Automatic multiple zebrafish tracking based on improved HOG features
The process of the improved HOG algorithm. First we applied the HOG algorithm to convert the zebrafish image samples to the HOG feature map. Then we classified the HOG feature blocks based on the correlation of the zebrafish’s back texture. The fixed number of blocks marked as 1 were outputted spirally from the centre. Finally we obtained the improved HOG feature with low dimensionality but high stability.
