KinSheep Dataset

KinSheep is a dataset for kinship detection from sheep faces. It contains 8,642 high resolution jpeg images of 1,549 individual animals with pedigree covariance value between each pair. Data Image data is split into 3 zipped folders data1.zip, data2.zip, and data3.zip, each containing the images and meta information. Genetic distance between all pairs of animals is provided in relationships.csv. Image files The format of the image file is <animal_id>_<image_instance>.jpg. For example, 0003_002.jpg is the 2nd instance image of animal 0003. Animal ids run from 0 to 1,548; the number of instances vary for each animal. Metadata files Each image is accompanied by xml information file <animal_id>_<image_instance>.xml. For example, 0003_002.xml contains metadata for 0003_002.jpg. Metadata provides information on the bounding box of the sheep's face in the image as well as the eyeline and noseline, which identify the location of the coarse features of the face. Face bounding box The location of the face in the image is provided as the "sheepface" object with (xmin,ymin) and (xmax,ymax) coordinates of the top left and bottom right corners of the bounding box. Eyeline and noseline The eyeline and noseline are features of the faces provided as the "eyeline" and "noseline" objects with (x1,y1) and (x2,y2) coordinates of the two ends of the line. Eyeline goes from centre of one eye to the other crossing the bridge of the nose; if only one eye is visible, it goes from centre of that eye to bridge of the nose. Noseline goes from the eyeline where it meets the bridge of the nose, along the bridge towards ending between the two nostrils; if the nostrils are not visible, it goes to the end of the nose. Relationships The animals in the images are assigned (randomly generated) ids. The file relationships.csv provide information about relationship between every pair of animals. There are 4 columns: id1, id2, GenomicCovariance and PedigreeCovariance. Ids identify the pair of animals for which the relationship is provided under genomic and pedigree covariance (pedigree relationship is an expectation and the genomic a realised estimate (which should be better)). Pedigree of 1 means it's the same animal (anything over 1 indicates coefficient of inbreeding); around 0.5 indicates parent/child or sibling relationship, around 0.25 a grandparent/grandchild relationship, and so on. Citing KinSheep dataset L. Szymanski and M. Lee. Coarse facial feature detection in sheep. In International Conference on Image and Vision Computing New Zealand (IVCNZ), pp. 1-6, 2021. Acknowledgement This project was made possible through the support of Beef+Lamb New Zealand.KinSheep是一款面向绵羊面部的亲缘关系检测数据集。该数据集包含1549只个体绵羊的8642张高分辨率JPEG（JPEG）图像，并标注了每对个体间的系谱协方差值。 数据 图像数据被划分为3个压缩文件夹：data1.zip、data2.zip与data3.zip，每个文件夹均包含图像文件与元信息。所有动物个体间的遗传距离信息已收录于relationships.csv文件中。 图像文件 图像文件的命名格式为<animal_id>_<image_instance>.jpg，例如0003_002.jpg代表编号0003的绵羊的第2张样本图像。绵羊个体编号范围为0至1548，每只个体的样本图像数量各不相同。 元数据文件 每张图像均配套有对应的XML（XML）元信息文件<animal_id>_<image_instance>.xml，例如0003_002.xml对应0003_002.jpg的元数据。元数据包含绵羊面部的边界框（bounding box）信息，以及用于定位面部粗粒度特征的眼直线（eyeline）与鼻直线（noseline）。 面部边界框 图像中面部的位置以"sheepface"对象标注，提供边界框左上角与右下角的坐标(xmin, ymin)和(xmax, ymax)。 眼直线与鼻直线 眼直线与鼻直线以"eyeline"和"noseline"对象标注，提供直线两端点的坐标(x1,y1)与(x2,y2)。其中，眼直线从一只眼睛的中心延伸至另一只眼睛的中心，穿过鼻梁；若仅可见单只眼睛，则从该只眼睛的中心延伸至鼻梁。鼻直线从眼直线与鼻梁的交点出发，沿鼻梁延伸至两鼻孔之间；若无法观察到鼻孔，则延伸至鼻尖。 亲缘关系 数据集中的绵羊个体均被分配随机生成的编号。relationships.csv文件提供了每对个体间的亲缘关系信息，该文件包含4列：id1、id2、基因组协方差（GenomicCovariance）与系谱协方差（PedigreeCovariance）。id列用于标识所标注亲缘关系对应的一对个体，其中系谱协方差为理论期望值，基因组协方差为实际估算值（准确度更高）。当系谱协方差为1时，表示为同一只个体；数值大于1则代表近交系数；约0.5代表亲子或同胞关系，约0.25代表祖孙关系，以此类推。 KinSheep数据集引用 L. Szymanski与M. Lee. 绵羊面部粗粒度特征检测. 见：新西兰国际图像与视觉计算大会（IVCNZ）, 2021, 第1-6页. 致谢 本项目得以完成得益于新西兰牛肉与羊肉协会（Beef+Lamb New Zealand）的支持。