clc;clear?all;close?all;
fid=fopen（?‘t_2.bmp‘‘rb‘）;%此處為想要讀取的文件名
bfType=fread（fid2）;
[s?errmsg]?=?sprintf（‘the?file?type:%s‘char（bfType））;
disp（s）;

bfSize=fread（fid4）;
fsize=bfSize（4）*256^3+bfSize（3）*256^2+bfSize（2）*256+bfSize（1）;
[s?errmsg]?=?sprintf（‘the?file?size:%d?byte‘fsize）;
disp（s）;

bfOffbits=fread（fid8）;
foffset=bfOffbits（8）*256^3+bfOffbits（7）*256^2+bfOffbits（6）*256+bfOffbits（5）;
[s?errmsg]?=?sprintf（‘offset?to?start?of?pixel?data:%d?byte‘foffset）;
disp（s）;

biSize=fread（fid4）;
isize=biSize（4）*256^3+biSize（3）*256^2+biSize（2）*256+biSize（1）;
[s?errmsg]?=?sprintf（‘the?size?of?infoheader:%d?byte‘isize）;
disp（s）;

infoRead=fread（fid8）;
biWidth=infoRead（4）*256^3+infoRead（3）*256^2+infoRead（2）*256+infoRead（1）;
biHeight=infoRead（8）*256^3+infoRead（7）*256^2+infoRead（6）*256+infoRead（5）;
[s?errmsg]?=?sprintf（‘width:?%d?\nheight:%d?‘biWidthbiHeight）;
disp（s）;

infoRead=fread（fid28）;
biBitCount=infoRead（4）*256+infoRead（3）;
biCompression=infoRead（8）*256^3+infoRead（7）*256^2+infoRead（6）*256+infoRead（5）;
biSizeImage=infoRead（12）*256^3+infoRead（11）*256^2+infoRead（10）*256+infoRead（9）;
biXPelsPerMeter=infoRead（16）*256^3+infoRead（15）*256^2+infoRead（14）*256+infoRead（13）;
biYPelsPerMeter=infoRead（20）*256^3+infoRead（19）*256^2+infoRead（18）*256+infoRead（17）;
biCirUsed=infoRead（24）*256^3+infoRead（23）*256^2+infoRead（22）*256+infoRead（21）;
biCirImportant=infoRead（28）*256^3+infoRead（27）*256^2+infoRead（26）*256+infoRead（25）;

[s?errmsg]?=?sprintf（‘the?bit?count:?%d?color?count:?%d‘...
????biBitCount2^biBitCount）;
disp（s）;
if?biCompression==0
????disp（‘no?compression‘）;
else?if?biCompression==1
????????disp（‘RLE8?compression‘）;
????else?if?biCompression==2
????????????disp（‘RLE4?compression‘）;
????????else?disp（‘bit?fields?compression‘）;
????????end
????end
end
if?biXPelsPerMeter~=0
????[s?errmsg]?=?sprintf（‘horizontal?resolution:%d?pixels?per?meter‘biXPelsPerMeter）;
????disp（s）;
else?disp（‘default?horizontal?resulution‘）;
end
if?biYPelsPerMeter~=0
?????[s?errmsg]?=?sprintf（‘verticular?resolution:%d?pixels?per?meter‘biYPelsPerMeter）;
?????disp（s）;
else?disp（‘default?verticular?resulution‘）;
end
if?biSizeImage~=0
?????[s?errmsg]?=?sprintf（‘image?size:?%d‘biSizeImage）;
?????disp（s）;
else?disp（‘No?compression‘）;
end
if?biCirUsed~=0
?????[s?errmsg]?=?sprintf（‘%d?color?actually?used‘biCirUsed）;
?????disp（s）;
else?disp（‘a(chǎn)ll?colors?are?used‘）;
end
if?biCirImportant~=0
??????[s?errmsg]?=?sprintf（‘count?of?significant?colors:%d‘biCirImportant）;
?????disp（s）;
else?disp（‘a(chǎn)ll?colors?are?significant‘）;
end
skip=mod（（4-mod（（（biWidth?*?biBitCount）/8）4））4）;
if?（（biBitCount==24）&&（foffset==54））
????for?i=1:biHeight
????????????if?biHeight>0
????????????????indHeight=biHeight+1-i;
????????????else?indHeight=i;
????????????end
????????for?j=1:biWidth
????????????colorRead=fread（fid3）;
????????????I（indHeightj1）=colorRead（3）;
????????????I（indHeightj2）=colorRead（2）;
???

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----

?????文件???????4011??2009-12-15?21:25??bmpdisplay.m

?????文件?????238134??2001-12-10?15:24??t_2.bmp

-----------?---------??----------?-----??----

???????????????242145????????????????????2