add reset for YUV conversion, yielding consistent colors on each run of test program
add reset for YUV conversion, yielding consistent colors on each run of test program

8l/connectal,chenm001/connectal,chenm001/connectal,cambridgehackers/connectal,cambridgehackers/connectal,hanw/connectal,8l/connectal,hanw/connectal,csail-csg/connectal,csail-csg/connectal,8l/connectal,cambridgehackers/connectal,cambridgehackers/connectal,8l/connectal,hanw/connectal,chenm001/connectal,chenm001/connectal,chenm001/connectal,csail-csg/connectal,cambridgehackers/connectal,csail-csg/connectal,hanw/connectal,hanw/connectal,8l/connectal,csail-csg/connectal