区块效应(blocking artifacts)是采用以区块为单位的动作补偿与区块转换，在失真 压缩时所造成的边界不連续现象，它也是目前主流的视讯编码标准，在低码率时
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Secondly,blocking artifacts factor map is extracted via computing the distortion caused by recompression. Finally,automatic detection and location of tampered region is realized by using image segmentation.
首先利用估计的一次压缩质量因子对待检测图像进行裁剪再压缩,然后通过计算压缩前后的失真提取图像的块效应指数映射图,最后采用图像分割的方法实现篡改区域的自动检测与定位。
参考来源 - 针对一类JPEG图像伪造的被动盲取证·2,447,543篇论文数据，部分数据来源于NoteExpress
A loop filter is employed to alleviate the blocking artifacts further.
一个环过滤器被雇用更进一步减轻阻断人工品。
At low bit rates, the block Discrete Cosine Transform (BDCT) compression methods often give rise to blocking artifacts.
低比特率时，基于块离散余弦变换(BDCT)的图像压缩方法常常会引起块效应。
Blocking artifacts are serious artifacts caused by block-based hybrid video coding, and significantly impair the subjective quality of the compressed video.
方块效应是基于块的混合视频编码算法产生的重要特征失真，严重影响了压缩后视频的主观质量。
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