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JPEG、JPEG2000图像压缩与色域变化的关联性分析
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作者 Kyung-Woo Ko tae-yong park +1 位作者 Yeong-Ho Ha 李人劼(编译) 《中国印刷与包装研究》 CAS 2010年第6期80-81,共2页
在传输带宽或存储空间有限时,利用图像压缩技术缩减冗余图像信息,可以高效地传递、储存数据。但是由于有损压缩的不可逆性,图像在高压缩率下会出现很多颜色失真,颜色信息的改变也会影响到压缩图像的色域属性。本文对使用JPEG和JPEG2000... 在传输带宽或存储空间有限时,利用图像压缩技术缩减冗余图像信息,可以高效地传递、储存数据。但是由于有损压缩的不可逆性,图像在高压缩率下会出现很多颜色失真,颜色信息的改变也会影响到压缩图像的色域属性。本文对使用JPEG和JPEG2000压缩图像的压缩比与色域变化间的关系进行了研究。为了探究两者之间的关系,同时考虑到其在CIELAB颜色空间中的分布均匀性,以Macbeth ColorChecker中的18种颜色样本为代表。基于代表色的颜色信息,按照4种颜色属性将12幅自然彩色图像分为2组,检验压缩图像的压缩比与色域的关系,发现色域保真性与不同色域中颜色数量和压缩比有关。最后,使用最小二乘法得到压缩比与色域变化量间的关系。对每组图像,通过二次方程绘制拟合曲线,得到原图形数据、压缩图像色域和对应近似值间的最小误差。 展开更多
关键词 图像压缩 JPEG 关联性分析 色域 颜色空间 图像信息 最小二乘法 压缩比
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Chuna Therapy for Musculoskeletal Pain:A Systematic Review of Randomized Clinical Trials in Korean Literature 被引量:1
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作者 Tae-Woong Moon Tae-Young Choi +1 位作者 tae-yong park Myeong Soo Lee 《Chinese Journal of Integrative Medicine》 SCIE CAS 2013年第3期228-232,共5页
Objective: To evaluate the effectiveness of Chuna for the treatment of musculoskeletal pain as reported in Korean literature. Methods: We conducted an electronic literature search using seven Korean databases and ma... Objective: To evaluate the effectiveness of Chuna for the treatment of musculoskeletal pain as reported in Korean literature. Methods: We conducted an electronic literature search using seven Korean databases and manually searched six traditional Korean medicine journals. Risk of bias was assessed with the Cochrane criteria. Results: Six randomized controlled trials (RCTs) were included in the study. Compared with standard care, three RCTs suggested favorable effects of Chuna on neck pain due to a hypolordotic cervical spine, low back pain caused by traffic accidents, and low back pain. In contrast, compared with standard care, three RCTs failed to show positive effects on temporomandibular joint disorder, mandibular movement, and neck pain caused by traffic accidents. Conclusions: Currently, the evidence of the effectiveness of Chuna for the treatment of musculoskeletal pain is not convincing. Further rigorously designed trials are warranted to determine its effectiveness. 展开更多
关键词 Chuna musculoskeletal pain systematic review Korean literature
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