Chinese Journal of Liquid Crystals and Displays, Volume. 38, Issue 5, 617(2023)
Real-time automatic image cropping based on portrait detection
Fig. 8. Results comparion of the method in this paper with the existing automatic image cropping methods
Table 1. Intelligent composition-solving the main character common algorithm pseudocode
View tableView in ArticleTable 1. Intelligent composition-solving the main character common algorithm pseudocode
算法I：主要人物共同中心点坐标求解算法 输入：bounding box坐标（x1i，y1i，x2i，y2i），i=1，2…n；
输出：主要人物的共同中心点坐标center_main（X，Y）；
begin
//遍历bounding box
for i∈｛0，…n｝do；
Si=（x2i-x1i）*（y2i-y1i）；
xi=（x1i+x2i）/2；
yi=（y1i+y2i）/2；
//求出面积最大的bounding box并加入group
Smax=max｛S1，S2，…. Sn｝；
group.append（max）；
X=xmax；Y=ymax；
//加入低于阈值的索引i 到group
for i∈｛0，…n｝do；
if（X-xi<Th）and（Y-yi<Th）
group.append（i）；
//求group中所以索引值对应的bounding box
的中心点坐标均值
X=mean（xgroup［i］）；
Y=mean（ygroup［i］）；
end
Table 2. Comparison of the network performance before and after the transformation
View tableView in ArticleTable 2. Comparison of the network performance before and after the transformation
Method Input Params/M FLOPs/G AP Centernet-resnet18 512 17.46 39.86 77.19 Ours 512 2.31 2.16 80.53
Table 3. Comparison of the FPS with existing automated image cropping methods
View tableView in ArticleTable 3. Comparison of the FPS with existing automated image cropping methods
Method FPS（GPU） FPS（CPU） A2-RL 5 0.05 VPN 75 0.8 VFN 0.5 0.005 VEN 0.2 0.002 Ours 77 5.02
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Yu-hang WU, Shan-ling LIN, Zhi-xian LIN, Tai-liang GUO. Real-time automatic image cropping based on portrait detection[J]. Chinese Journal of Liquid Crystals and Displays, 2023, 38(5): 617
Category: Research Articles
Received: Aug. 1, 2022
Accepted: --
Published Online: Jul. 4, 2023
The Author Email: Shan-ling LIN (sllin@fzu.edu.cn)
