tailieunhanh - O’Reilly Learning OpenCV phần 2

Mike Loukides sản xuất biên tập: Rachel Monaghan Sản xuất: Newgen xuất bản và dịch vụ dữ liệu Bao gồm thiết kế: thiết kế Karen Montgomery Nội vụ: David Futato Illustrator: Robert Romano | Table 3-2. OpenCV image types Macro Image pixel type IPL_DEPTH_8U IPL_DEPTH_8S Unsigned 8-bit integer 8u Signed 8-bit integer 8s IPL_DEPTH_16S Signed 16-bit integer 16s IPL_DEPTH_32S M . IPL_DEPTH_32F IPL_DEPTH_64F Signed 32-bit integer 32s 32-bit flying-point single-precision 32f 64-bit floating-point double-precision 64f The _ossible values for nChannels are 1 2 3 or 4. The next two important members nre origin and dataOrder. The origin variable can take one oftwo values OPL_ORICaN_TL or IPL_ORIGIO_BL corresponding to the origin of coxrdinotts being located in eilherthe uppeLdeftor lower-left corners of the image respectively. The lack of a standard origin upper versus lower is an important source of error in computer vision routines. In particular depending on where an image came from rhe opcratinc system mdrv. storagefoumat ard so forth email affpsi the Io s -tsonof the origin sf the coordinates el a pertisular image. Fon mrmgle _ou mcyth-nV ycu arasamplit pi e ltf toma fare tn t hr top quadrani of -to imega when you ms reriIy nrmpliog from s shiv in she Sottom quahrnoii It it ieei to deck thr eysSam the firet limelhrough by drawing whtre oou a inkyeh seeoperrtingon am ámags p atdi. Vice drtao cdrr maybe eiiher tPtoeAnaurSDIRJiIXiL os- op i_DVUr_a RDSSjrrSE. ahisvelue tndicat ea wfrthartfr dr e thouldbejv aclcs d. with mmHipk c_e onsls OTieafttr the othsr foreach pgd gp trr oaved ths ueoa- caset. or rattes -th 0s - hs spa nnakcluttoead into imane git vet mlfrithe plr nasplcaad sne sOes Strother. Thg paramde 1 a ioesst-1 codm ns the mimbw tfb es beiwern pg mfr lo a ame col-umnrnd oatoessíae rows Osi-miao to the step earamet_o of SvMet discussrd aariier . agio variapla widtr tsnot snfficiea1 tosekulate as héslnnrehacaul e soa row met be viígnsd withacertain numbarofhhere to achievt aagrseprocarsénh -a ohe imaoei Oe-te ihssp mas bn some io-ì hsInren oar end ofet St rowand the start of g 1 row. The pa-Thmrtse igoaoDaeacodtaiyc a sointarto the Orsi row ol0msno drta.