SELECT DISTINCT COUNT ( t2.paperid )  ,  t1.authorid FROM venue AS t3 JOIN paper AS t2 ON t3.venueid  =  t2.venueid JOIN writes AS t1 ON t1.paperid  =  t2.paperid WHERE t2.year  =  2007 AND t3.venuename  =  "CVPR" GROUP BY t1.authorid ORDER BY COUNT ( t2.paperid ) DESC;
who wrote the most papers for CVPR 2007