Ask HN: Is this plagiarism?

https://www.cv-foundation.org/openaccess/content_cvpr_2015/papers/Hofmanninger_Mapping_Visual_Features_2015_CVPR_paper.pdf

vs.

https://pdfs.semanticscholar.org/3276/436e8ceffa3f2ed1e4b648fbef7c85b59616.pdf