X LY NH SOLOC NHIEU XUNG

K thut in t 2006

Ni dungNhiu xungB lc trung bnh B lc im giaX l nh muM phngKt lun

K thut in t 2006

1. Nhiu xungnh goc (ban au)nh b nhieu xung tac ong

K thut in t 2006

1. Nhiu xungNhiu xungNhiu nh phn (binary noise)Salt & pepper noiseCc pixel trng v en xut hin ngu nhin trn nhNguyn nhnLi cc phn t cm bin my nhQu trnh xn tng t b liMt d liu trong qu trnh truyn, nn v gii nn ...

K thut in t 2006

2. B lc trung bnh tng

K thut in t 2006

2. B lc trung bnhGii thutChn ca s lc (l 1 ma trn vung nxn, c chiu di thay i c)Tnh trung bnh ca cc gi tr trong pixelThay gi tr trung bnh va tnh c vo v tr gia ca ca s lcDch chuyn ca s lc sang ct (hng) k tipLp li bc 2

K thut in t 2006

3. B lc im gia tng

K thut in t 2006

3. B lc im giaGii thutChn ca s lc (l 1 ma trn c chiu di thay i c)Sp xp cc pixel vi gi tr tng dn (hay gim dn) t tri sang phiGi tr pixel gia l gi tr cn thay thDch chuyn ca s lc sang ct (hng) k tipLp li bc 2

K thut in t 2006

4. X l nh munh trng en c lu trong b nh my tnh nh mt mng 2 chiu (1 ma trn 2 chiu)

K thut in t 2006

4. X l nh muHu ht nh mu c lu trong b nh my tnh nh mt mng 3 chiu (1 ma trn 3 chiu). Hai ch s u ch dng v ct ca pixel v ch s th 3 cho bit mt phng mu, trong 1 l mu (Red), 2 l mu xanh l (Green), v 3 l mu xanh da tri (Blue)3 Dim array for 24 bit color

K thut in t 2006

5. M phng

K thut in t 2006

6. Kt lunImpulse noise filterBo loc trung bnhAnh gocBo loc iem gia

K thut in t 2006

X l nh muAnh gocB nhieu tac ongSau khi loc nhieu

K thut in t 2006

6. Kt lunB lc trung bnh lm m cc cnh v chi tit ca nhB lc im gia khc phc c bt li trnKch thc ca ca s lc khng nht thit phi l mt ma trn vungNhc im: gi tr cc pixel ln cn im nhiu (pixel gc) cng b thay i theo

K thut in t 2006