文章目录
前言
数据的生成是门艺术,文章地址:
https://link.springer.com/article/10.1007/s10994-016-5560-1
摘要
要点如下:
- 对九种包生成器 (bag generators)进行了比较学习,即Row1, SB1, SBN1, Blobworld2, k-meansSeg3, WavSeg4, JSEG-bag5, LBP6和SIFT7。
- 结论:
2.1 采用密度采样 (dense sample)策略的包生成器效果更优;
2.2 标准多示例假设不适用于图像分类任务 (这句话存疑)。
1 包生成器
根据包生成器是否可以区分图像的语义成分 (semantic components),将其分为non-segmentation 包生成器和segmentation 包生成器。
1)non-segmentation 包生成器:Row, SB, SBN;
2)segmentation 包生成器:Blobworld, k-meansSeg, WavSeg, JSEG-bag;
3)不属于以上,即local descriptors:LBP6, SIFT。
简单说来,non-segmentation就是划分方式与图像无关;local descriptors用于计算机视觉中描述某区域外观或形状的不同特征。
1.1 Row
简单说来就是一行一个实例。
1.1.1 详细步骤
1)给定任意一张图片,本文选择的是COREL数据源中的Tiger数据集。
2)滤波,‘mean’, ‘Gaussian’, ‘median’, 'bilateral’四种滤波的结果如下,此处默认选择Gaussian滤波:
3)更改图像大小,默认设置为8×8:
4)
1.1.2 完整代码
2 支持代码
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