PMC:7782580 / 61199-61445 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T460","span":{"begin":0,"end":246},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Given a target category, the Grad-CAM performed back-propagation to obtain the final CNN feature maps and the gradient of the feature maps; only pixels with positive contributions to the specified category were retained through the ReLU function."}