fix image mean type
fix image mean type

ykim362/mxnet,formath/mxnet,precedenceguo/mxnet,pluskid/mxnet,yajiedesign/mxnet,reminisce/mxnet,Northrend/mxnet,wangyum/mxnet,jiajiechen/mxnet,madjam/mxnet,reminisce/mxnet,ShownX/incubator-mxnet,hesseltuinhof/mxnet,mbaijal/incubator-mxnet,antoan2/incubator-mxnet,sergeykolychev/mxnet,ShownX/incubator-mxnet,crazy-cat/incubator-mxnet,jennyzhang0215/incubator-mxnet,hpi-xnor/BMXNet,tornadomeet/mxnet,smolix/incubator-mxnet,eric-haibin-lin/mxnet,nicklhy/mxnet,gautamkmr/incubator-mxnet,kevinthesun/mxnet,ptrendx/mxnet,arank/mxnet,Ldpe2G/mxnet,antoan2/incubator-mxnet,xcgoner/dist-mxnet,kkk669/mxnet,dmlc/mxnet,navrasio/mxnet,madjam/mxnet,yajiedesign/mxnet,crazy-cat/incubator-mxnet,rishita/mxnet,weleen/mxnet,arikpoz/mxnet,likelyzhao/mxnet,jamesliu/mxnet,jermainewang/mxnet,arank/mxnet,ZihengJiang/mxnet,saurabh3949/mxnet,Prasad9/incubator-mxnet,ForkedReposBak/mxnet,indhub/mxnet,CodingCat/mxnet,eric-haibin-lin/mxnet,nicklhy/mxnet,ykim362/mxnet,precedenceguo/mxnet,EvanzzzZ/mxnet,likelyzhao/mxnet,jamesliu/mxnet,smolix/incubator-mxnet,hesseltuinhof/mxnet,arikpoz/mxnet,larroy/mxnet,tornadomeet/mxnet,solin319/incubator-mxnet,ForkedReposBak/mxnet,DR08/mxnet,jamesliu/mxnet,larroy/mxnet,vikingMei/mxnet,smolix/incubator-mxnet,apaleyes/mxnet,jamesliu/mxnet,pluskid/mxnet,Prasad9/incubator-mxnet,jennyzhang0215/incubator-mxnet,coder-james/mxnet,dmlc/mxnet,hesseltuinhof/mxnet,indhub/mxnet,jiajiechen/mxnet,ptrendx/mxnet,kkk669/mxnet,reminisce/mxnet,sxjscience/mxnet,arikpoz/mxnet,nicklhy/mxnet,piiswrong/mxnet,hpi-xnor/BMXNet,szha/mxnet,wangyum/mxnet,sergeykolychev/mxnet,eric-haibin-lin/mxnet,DR08/mxnet,weleen/mxnet,xcgoner/dist-mxnet,nicklhy/mxnet,yuruofeifei/mxnet,weleen/mxnet,precedenceguo/mxnet,CodingCat/mxnet,kevinthesun/mxnet,ZihengJiang/mxnet,hesseltuinhof/mxnet,DR08/mxnet,ykim362/mxnet,sxjscience/mxnet,formath/mxnet,ForkedReposBak/mxnet,formath/mxnet,ptrendx/mxnet,hesseltuinhof/mxnet,danithaca/mxnet,LinkHS/incubator-mxnet,ShownX/incubator-mxnet,hotpxl/mxnet,pluskid/mxnet,szha/mxnet,LinkHS/incubator-mxnet,jennyzhang0215/incubator-mxnet,hpi-xnor/BMXNet,hotpxl/mxnet,Northrend/mxnet,likelyzhao/mxnet,sxjscience/mxnet,sergeykolychev/mxnet,Mega-DatA-Lab/mxnet,fullfanta/mxnet,crazy-cat/incubator-mxnet,formath/mxnet,Northrend/mxnet,Ldpe2G/mxnet,mbaijal/incubator-mxnet,sxjscience/mxnet,Prasad9/incubator-mxnet,weleen/mxnet,smolix/incubator-mxnet,mbaijal/incubator-mxnet,jennyzhang0215/incubator-mxnet,luoyetx/mxnet,jermainewang/mxnet,precedenceguo/mxnet,reminisce/mxnet,szha/mxnet,antoan2/incubator-mxnet,ShownX/incubator-mxnet,apaleyes/mxnet,DickJC123/mxnet,smolix/incubator-mxnet,madjam/mxnet,EvanzzzZ/mxnet,EvanzzzZ/mxnet,ykim362/mxnet,leezu/mxnet,arank/mxnet,formath/mxnet,gautamkmr/incubator-mxnet,yajiedesign/mxnet,EvanzzzZ/mxnet,eric-haibin-lin/mxnet,Mega-DatA-Lab/mxnet,rishita/mxnet,apache/incubator-mxnet,solin319/incubator-mxnet,piiswrong/mxnet,fullfanta/mxnet,solin319/incubator-mxnet,kevinthesun/mxnet,Ldpe2G/mxnet,stefanhenneking/mxnet,LinkHS/incubator-mxnet,tlby/mxnet,Northrend/mxnet,hotpxl/mxnet,Mega-DatA-Lab/mxnet,zhreshold/mxnet,rishita/mxnet,sergeykolychev/mxnet,solin319/incubator-mxnet,ykim362/mxnet,madjam/mxnet,kkk669/mxnet,luoyetx/mxnet,navrasio/mxnet,ForkedReposBak/mxnet,Guneet-Dhillon/mxnet,DickJC123/mxnet,leezu/mxnet,precedenceguo/mxnet,TuSimple/mxnet,gautamkmr/incubator-mxnet,luoyetx/mxnet,pluskid/mxnet,indhub/mxnet,hotpxl/mxnet,vikingMei/mxnet,wangyum/mxnet,yajiedesign/mxnet,apache/incubator-mxnet,Northrend/mxnet,jermainewang/mxnet,TuSimple/mxnet,larroy/mxnet,thirdwing/mxnet,Guneet-Dhillon/mxnet,xcgoner/dist-mxnet,larroy/mxnet,saurabh3949/mxnet,rahul003/mxnet,tornadomeet/mxnet,ykim362/mxnet,jiajiechen/mxnet,stefanhenneking/mxnet,yuruofeifei/mxnet,leezu/mxnet,eric-haibin-lin/mxnet,Prasad9/incubator-mxnet,vikingMei/mxnet,apache/incubator-mxnet,thirdwing/mxnet,ptrendx/mxnet,kkk669/mxnet,kevinthesun/mxnet,antoan2/incubator-mxnet,yajiedesign/mxnet,hpi-xnor/BMXNet,madjam/mxnet,kevinthesun/mxnet,navrasio/mxnet,gautamkmr/incubator-mxnet,saurabh3949/mxnet,jennyzhang0215/incubator-mxnet,Mega-DatA-Lab/mxnet,danithaca/mxnet,tornadomeet/mxnet,solin319/incubator-mxnet,crazy-cat/incubator-mxnet,Mega-DatA-Lab/mxnet,gautamkmr/incubator-mxnet,apaleyes/mxnet,apaleyes/mxnet,CodingCat/mxnet,hesseltuinhof/mxnet,apache/incubator-mxnet,smolix/incubator-mxnet,Prasad9/incubator-mxnet,Prasad9/incubator-mxnet,LinkHS/incubator-mxnet,sergeykolychev/mxnet,antoan2/incubator-mxnet,zhreshold/mxnet,Ldpe2G/mxnet,wangyum/mxnet,hotpxl/mxnet,hotpxl/mxnet,Ldpe2G/mxnet,crazy-cat/incubator-mxnet,solin319/incubator-mxnet,ForkedReposBak/mxnet,piiswrong/mxnet,nicklhy/mxnet,jennyzhang0215/incubator-mxnet,kkk669/mxnet,lxn2/mxnet,jermainewang/mxnet,zhreshold/mxnet,jermainewang/mxnet,coder-james/mxnet,saurabh3949/mxnet,arank/mxnet,ZihengJiang/mxnet,yuruofeifei/mxnet,yajiedesign/mxnet,xcgoner/dist-mxnet,navrasio/mxnet,reminisce/mxnet,arikpoz/mxnet,fullfanta/mxnet,arikpoz/mxnet,weleen/mxnet,leezu/mxnet,szha/mxnet,CodingCat/mxnet,Guneet-Dhillon/mxnet,precedenceguo/mxnet,hotpxl/mxnet,sxjscience/mxnet,solin319/incubator-mxnet,piiswrong/mxnet,rahul003/mxnet,solin319/incubator-mxnet,danithaca/mxnet,gautamkmr/incubator-mxnet,dmlc/mxnet,wangyum/mxnet,piiswrong/mxnet,kkk669/mxnet,saurabh3949/mxnet,Ldpe2G/mxnet,zhreshold/mxnet,larroy/mxnet,szha/mxnet,larroy/mxnet,EvanzzzZ/mxnet,hotpxl/mxnet,CodingCat/mxnet,saurabh3949/mxnet,DR08/mxnet,ptrendx/mxnet,kkk669/mxnet,yuruofeifei/mxnet,DickJC123/mxnet,jennyzhang0215/incubator-mxnet,coder-james/mxnet,jiajiechen/mxnet,Prasad9/incubator-mxnet,hpi-xnor/BMXNet,nicklhy/mxnet,DR08/mxnet,szha/mxnet,yuruofeifei/mxnet,kkk669/mxnet,pluskid/mxnet,gautamkmr/incubator-mxnet,larroy/mxnet,vikingMei/mxnet,luoyetx/mxnet,navrasio/mxnet,luoyetx/mxnet,pluskid/mxnet,leezu/mxnet,rishita/mxnet,rahul003/mxnet,Northrend/mxnet,indhub/mxnet,Prasad9/incubator-mxnet,jamesliu/mxnet,sergeykolychev/mxnet,dmlc/mxnet,indhub/mxnet,stefanhenneking/mxnet,pluskid/mxnet,stefanhenneking/mxnet,lxn2/mxnet,hesseltuinhof/mxnet,hpi-xnor/BMXNet,crazy-cat/incubator-mxnet,madjam/mxnet,Northrend/mxnet,tlby/mxnet,thirdwing/mxnet,jiajiechen/mxnet,arank/mxnet,yajiedesign/mxnet,DR08/mxnet,ptrendx/mxnet,vikingMei/mxnet,tlby/mxnet,xcgoner/dist-mxnet,ptrendx/mxnet,danithaca/mxnet,DickJC123/mxnet,Ldpe2G/mxnet,ZihengJiang/mxnet,Mega-DatA-Lab/mxnet,jamesliu/mxnet,thirdwing/mxnet,saurabh3949/mxnet,TuSimple/mxnet,CodingCat/mxnet,precedenceguo/mxnet,eric-haibin-lin/mxnet,TuSimple/mxnet,apaleyes/mxnet,coder-james/mxnet,navrasio/mxnet,leezu/mxnet,Northrend/mxnet,ZihengJiang/mxnet,jermainewang/mxnet,hesseltuinhof/mxnet,mbaijal/incubator-mxnet,ZihengJiang/mxnet,saurabh3949/mxnet,navrasio/mxnet,szha/mxnet,hesseltuinhof/mxnet,weleen/mxnet,danithaca/mxnet,ykim362/mxnet,jennyzhang0215/incubator-mxnet,stefanhenneking/mxnet,TuSimple/mxnet,pluskid/mxnet,eric-haibin-lin/mxnet,sergeykolychev/mxnet,ForkedReposBak/mxnet,dmlc/mxnet,mbaijal/incubator-mxnet,zhreshold/mxnet,rishita/mxnet,larroy/mxnet,piiswrong/mxnet,indhub/mxnet,Ldpe2G/mxnet,yuruofeifei/mxnet,jiajiechen/mxnet,likelyzhao/mxnet,yajiedesign/mxnet,tlby/mxnet,rishita/mxnet,reminisce/mxnet,tornadomeet/mxnet,tornadomeet/mxnet,xcgoner/dist-mxnet,ZihengJiang/mxnet,Mega-DatA-Lab/mxnet,hotpxl/mxnet,hpi-xnor/BMXNet,precedenceguo/mxnet,indhub/mxnet,DR08/mxnet,kevinthesun/mxnet,danithaca/mxnet,danithaca/mxnet,fullfanta/mxnet,mbaijal/incubator-mxnet,tlby/mxnet,vikingMei/mxnet,arikpoz/mxnet,Mega-DatA-Lab/mxnet,tlby/mxnet,CodingCat/mxnet,sxjscience/mxnet,Prasad9/incubator-mxnet,likelyzhao/mxnet,mbaijal/incubator-mxnet,madjam/mxnet,yuruofeifei/mxnet,zhreshold/mxnet,solin319/incubator-mxnet,zhreshold/mxnet,navrasio/mxnet,fullfanta/mxnet,coder-james/mxnet,reminisce/mxnet,vikingMei/mxnet,eric-haibin-lin/mxnet,sergeykolychev/mxnet,EvanzzzZ/mxnet,precedenceguo/mxnet,stefanhenneking/mxnet,TuSimple/mxnet,rishita/mxnet,pluskid/mxnet,ShownX/incubator-mxnet,gautamkmr/incubator-mxnet,dmlc/mxnet,Guneet-Dhillon/mxnet,apaleyes/mxnet,Guneet-Dhillon/mxnet,LinkHS/incubator-mxnet,mbaijal/incubator-mxnet,dmlc/mxnet,weleen/mxnet,sxjscience/mxnet,arikpoz/mxnet,luoyetx/mxnet,rahul003/mxnet,coder-james/mxnet,szha/mxnet,smolix/incubator-mxnet,luoyetx/mxnet,indhub/mxnet,wangyum/mxnet,weleen/mxnet,xcgoner/dist-mxnet,tlby/mxnet,apaleyes/mxnet,arikpoz/mxnet,LinkHS/incubator-mxnet,nicklhy/mxnet,ForkedReposBak/mxnet,tornadomeet/mxnet,ZihengJiang/mxnet,danithaca/mxnet,reminisce/mxnet,gautamkmr/incubator-mxnet,antoan2/incubator-mxnet,navrasio/mxnet,jiajiechen/mxnet,likelyzhao/mxnet,lxn2/mxnet,likelyzhao/mxnet,formath/mxnet,dmlc/mxnet,yuruofeifei/mxnet,arank/mxnet,madjam/mxnet,antoan2/incubator-mxnet,Guneet-Dhillon/mxnet,wangyum/mxnet,fullfanta/mxnet,stefanhenneking/mxnet,ForkedReposBak/mxnet,eric-haibin-lin/mxnet,weleen/mxnet,lxn2/mxnet,jiajiechen/mxnet,rahul003/mxnet,piiswrong/mxnet,ShownX/incubator-mxnet,kevinthesun/mxnet,piiswrong/mxnet,DR08/mxnet,ykim362/mxnet,ShownX/incubator-mxnet,vikingMei/mxnet,arank/mxnet,lxn2/mxnet,stefanhenneking/mxnet,formath/mxnet,likelyzhao/mxnet,ZihengJiang/mxnet,formath/mxnet,larroy/mxnet,xcgoner/dist-mxnet,ptrendx/mxnet,jennyzhang0215/incubator-mxnet,rishita/mxnet,rishita/mxnet,arank/mxnet,piiswrong/mxnet,fullfanta/mxnet,jermainewang/mxnet,sxjscience/mxnet,tlby/mxnet,tornadomeet/mxnet,saurabh3949/mxnet,apaleyes/mxnet,ShownX/incubator-mxnet,dmlc/mxnet,apaleyes/mxnet,Guneet-Dhillon/mxnet,sxjscience/mxnet,Ldpe2G/mxnet,reminisce/mxnet,kevinthesun/mxnet,jermainewang/mxnet,coder-james/mxnet,CodingCat/mxnet,antoan2/incubator-mxnet,zhreshold/mxnet,thirdwing/mxnet,luoyetx/mxnet,lxn2/mxnet,tlby/mxnet,TuSimple/mxnet,Northrend/mxnet,yajiedesign/mxnet,zhreshold/mxnet,nicklhy/mxnet,crazy-cat/incubator-mxnet,smolix/incubator-mxnet,tlby/mxnet,tornadomeet/mxnet,fullfanta/mxnet,xcgoner/dist-mxnet,yuruofeifei/mxnet,jamesliu/mxnet,antoan2/incubator-mxnet,crazy-cat/incubator-mxnet,rahul003/mxnet,Mega-DatA-Lab/mxnet,thirdwing/mxnet,wangyum/mxnet,indhub/mxnet,luoyetx/mxnet,Guneet-Dhillon/mxnet,jiajiechen/mxnet,szha/mxnet,coder-james/mxnet,wangyum/mxnet,danithaca/mxnet,rahul003/mxnet,TuSimple/mxnet,kkk669/mxnet,leezu/mxnet,ptrendx/mxnet,madjam/mxnet,thirdwing/mxnet,ForkedReposBak/mxnet,thirdwing/mxnet,vikingMei/mxnet,sergeykolychev/mxnet,nicklhy/mxnet,TuSimple/mxnet,stefanhenneking/mxnet,jermainewang/mxnet,leezu/mxnet,rahul003/mxnet,hpi-xnor/BMXNet,coder-james/mxnet,kevinthesun/mxnet,ShownX/incubator-mxnet,smolix/incubator-mxnet,LinkHS/incubator-mxnet,lxn2/mxnet,TuSimple/mxnet,EvanzzzZ/mxnet,reminisce/mxnet,arank/mxnet,rahul003/mxnet,CodingCat/mxnet,LinkHS/incubator-mxnet,LinkHS/incubator-mxnet,leezu/mxnet,DR08/mxnet,hpi-xnor/BMXNet,jamesliu/mxnet,fullfanta/mxnet,ptrendx/mxnet,ykim362/mxnet,EvanzzzZ/mxnet,crazy-cat/incubator-mxnet,jamesliu/mxnet,thirdwing/mxnet,mbaijal/incubator-mxnet,formath/mxnet,likelyzhao/mxnet,lxn2/mxnet,lxn2/mxnet,arikpoz/mxnet,Guneet-Dhillon/mxnet,EvanzzzZ/mxnet