SELECT DISTINCT COUNT ( DISTINCT t3.paperid ) FROM paperdataset AS t2 JOIN dataset AS t1 ON t2.datasetid  =  t1.datasetid JOIN paper AS t3 ON t3.paperid  =  t2.paperid WHERE t1.datasetname LIKE "ImageNet";
how many papers are based on ImageNet
[Schema (values) (types)]: | scholar |  venue : venueid (text) , venuename (number) | author : authorid (text) , authorname (number) | dataset : datasetid (text) , datasetname (number) | journal : journalid (text) , journalname (number) | keyphrase : keyphraseid (text) , keyphrasename (number) | paper : paperid (text) , title (number) , venueid (text) , year (number) , numciting (text) , numcitedby (number) , journalid (text) | cite : citingpaperid (text) , citedpaperid (number) | paperDataset : paperid (text) , datasetid (number) | paperKeyphrase : paperid (text) , keyphraseid (number) | writes : paperid (text) , authorid (number);