I have collected a large dataset by crawling images from web and scraping directly from some websites. These images contain people and have been utilized for my own research work. I do not have any written permission from the publisher of the images. However, I want to share this dataset with other researcher. There are many vision datasets which are available publicly for research purpose and contain images collected from web. In my understanding researcher share datasets under some licence and for private and research use only. My doubt is that, how can I publish/share the dataset which I have created for research purpose with other researchers? What are the complications (in legal terms)? If it is not permissible then how to create a large dataset like imagenet which can be shared among research community?