Recent studies have shown that visually impaired people have desires to take
selfies in the same way as sighted people do to record their photos and share
them with others. Although support applications using sound and vibration have
been developed to help visually impaired people take selfies using smartphone
cameras, it is still difficult to capture everyone in the angle of view, and it
is also difficult to confirm that they all have good expressions in the photo.
To mitigate these issues, we propose a method to take selfies with multiple
people using an omni-directional camera. Specifically, a user takes a few
seconds of video with an omni-directional camera, followed by face detection on
all frames. The proposed method then eliminates false face detections and
complements undetected ones considering the consistency across all frames.
After performing facial expression recognition on all the frames, the proposed
method finally extracts the frame in which the participants are happiest, and
generates a perspective projection image in which all the participants are in
the angle of view from the omni-directional frame. In experiments, we use
several scenes with different number of people taken to demonstrate the
effectiveness of the proposed method.

最近的研究表明，视障人士希望像视力正常的人一样拍自拍照记录他们的照片并与他人分享。为了解决视障人士在拍摄自拍照时遇到的问题，本文提出了使用全景相机的多人自拍方法，通过面部检测、表情识别等技术，从多个视频帧中提取最满意的照片，并生成透视投影图，以确保所有参与者都在视角内。实验结果验证了该方法的有效性。