More attention has been paid to the study of video object segmentation in compressed domain these years, which has already led to some practical technology. In this paper, a scheme is put forward for segmentation of h...More attention has been paid to the study of video object segmentation in compressed domain these years, which has already led to some practical technology. In this paper, a scheme is put forward for segmentation of head-shoulder video in MPEG (Motion Picture Experts Group) compressed domain. The conception of DCT (Discrete Cosine Transform) feature plane is defined. In the suggested scheme, firstly, the face region is detected by clustering skin-tone DCT feature points in the DCT feature plane. Secondly, the region of head-shoulder is approximately regarded as combination of the head rectangle and shoulder rectangle, and head rectangle is confirmed by double template matching. Thirdly, Canny operator and morphological operation are applied to the region of head-shoulder in feature plane to get the object mask and the region of object mask is rectified by correlation of DCT blocks to get high-quality segmentation.展开更多
目的:探讨肩关节镜下应用改良Chinese-way技术治疗巨大肩袖撕裂的临床疗效。方法:自2019年1月至2022年6月采用肩关节镜下改良Chinese-way技术治疗22例巨大肩袖撕裂患者,其中男10例,女12例;年龄46~76(64.14±7.45)岁;病程5~14(8.32...目的:探讨肩关节镜下应用改良Chinese-way技术治疗巨大肩袖撕裂的临床疗效。方法:自2019年1月至2022年6月采用肩关节镜下改良Chinese-way技术治疗22例巨大肩袖撕裂患者,其中男10例,女12例;年龄46~76(64.14±7.45)岁;病程5~14(8.32±2.42)个月;19例采用完全修补,3例采用部分修补。分别于术前和术后1年采用视觉模拟评分(visual analogue scale,VAS)、加州大学洛杉矶分校(University of California Los Angeles,UCLA)评分评价疼痛与肩关节功能;并观察术后并发症情况,影像学随访重建组织结构的完整性,肩峰下间隙大小。结果:22例患者获得随访,时间12~34(17.14±5.93)个月。MRI随访4例发生再撕裂(患者对功能满意,未进一步处理)外,其余均未出现切口感染、周围神经损伤、锚钉松动脱落等并发症。术前及术后1年VAS分别为(8.05±1.12)分和(1.82±1.50)分;UCLA评分分别为(7.45±1.65)分和(31.41±2.87)分,差异均有统计学意义(P<0.05)。结论:肩关节镜下改良Chinese-way技术修补巨大肩袖撕裂,可明显缓解疼痛,改善肩关节功能,早期临床疗效满意。展开更多
基金Supported by the National 973 Project of China (No.2001CB309403).
文摘More attention has been paid to the study of video object segmentation in compressed domain these years, which has already led to some practical technology. In this paper, a scheme is put forward for segmentation of head-shoulder video in MPEG (Motion Picture Experts Group) compressed domain. The conception of DCT (Discrete Cosine Transform) feature plane is defined. In the suggested scheme, firstly, the face region is detected by clustering skin-tone DCT feature points in the DCT feature plane. Secondly, the region of head-shoulder is approximately regarded as combination of the head rectangle and shoulder rectangle, and head rectangle is confirmed by double template matching. Thirdly, Canny operator and morphological operation are applied to the region of head-shoulder in feature plane to get the object mask and the region of object mask is rectified by correlation of DCT blocks to get high-quality segmentation.
文摘目的:探讨肩关节镜下应用改良Chinese-way技术治疗巨大肩袖撕裂的临床疗效。方法:自2019年1月至2022年6月采用肩关节镜下改良Chinese-way技术治疗22例巨大肩袖撕裂患者,其中男10例,女12例;年龄46~76(64.14±7.45)岁;病程5~14(8.32±2.42)个月;19例采用完全修补,3例采用部分修补。分别于术前和术后1年采用视觉模拟评分(visual analogue scale,VAS)、加州大学洛杉矶分校(University of California Los Angeles,UCLA)评分评价疼痛与肩关节功能;并观察术后并发症情况,影像学随访重建组织结构的完整性,肩峰下间隙大小。结果:22例患者获得随访,时间12~34(17.14±5.93)个月。MRI随访4例发生再撕裂(患者对功能满意,未进一步处理)外,其余均未出现切口感染、周围神经损伤、锚钉松动脱落等并发症。术前及术后1年VAS分别为(8.05±1.12)分和(1.82±1.50)分;UCLA评分分别为(7.45±1.65)分和(31.41±2.87)分,差异均有统计学意义(P<0.05)。结论:肩关节镜下改良Chinese-way技术修补巨大肩袖撕裂,可明显缓解疼痛,改善肩关节功能,早期临床疗效满意。