Real-Time Depth-Based Hand Detection and Tracking

Algorithm 1

Proposed algorithm for feature extraction.

Input:

 𝐼     // input image segment

 𝑁_𝑥 and 𝑁_𝑦 // control parameters

Initialize:

step_𝑥=𝐼_𝑤/2𝑁_𝑥,step_𝑦=𝐼_ℎ/2𝑁_𝑦block_𝑤=𝐼_𝑤/𝑁_𝑥,block_ℎ=𝐼_ℎ/𝑁_𝑦End_𝑥=2𝑁_𝑥−1,End_𝑦=2𝑁_𝑦−1

  𝑖=0

for 𝑥=0,…,End_𝑥

 for 𝑦=0,…,End_𝑦

    roi=Rect(𝑥×step_𝑥,𝑦×step_𝑦,block_𝑤,block_ℎ)

    Fv[𝑖]=Depth_𝑐−Area(roi)/(roi_𝑤×roi_ℎ)

    𝑖=𝑖+1

 end

end

Output:

 The feature value array Fv.