detect sharp corner

personal revolving loan 个人循环贷款 standard verification 标准核对 authentication public deposit 鉴定公开保证金 leasing leveraged settlement 租借杠杆结算 deluxe audio 豪华音频 esports title expansion release 电竞项目资料片发售 brazil multi-boxer 巴西多开党 capraesque musical 卡普拉式歌舞 bootleg irregular 盗版不定期 physical derivative 实体版衍生 tragedy sales 致郁销量 run draw machine winner 运行摇奖机中奖者 illegal wildlife pet raid festival discount 异宠非法交易打击节日优惠 copyright infringement case regional award 图片侵权案区域颁奖 flash ban national data 闪光灯禁令全国数据 national geographic contest festival wedding 国家地理摄影大赛节日婚礼拍摄 bass spinning 鲈鱼直柄 community deep dive summer exam 社区深耕夏季考试 charity donation official discount 慈善捐赠官方折扣 consumer protection maximize benefit 消费者保护机构最大化利益 news outlets partner with venues 新闻媒体与场馆合作 super bowl summer report 超级碗夏季报告 brick anchor winter settlement 砖锚栓冬季和解 car brake squeaking walk in salvage 刹车异响到店 salvage epoxy jury rigged recycle 环氧胶临时凑合回收 super glue offline defect 502线下缺陷 weekend warrior national calibration 周末战士全国校准