%?BDCT?Blocked?discrete?cosine?transform
%
%????B?=?BDCT（A）?computes?DCT2?transform?of?A?in?8x8?blocks.??B?is
%????the?same?size?as?A?and?contains?the?cosine?transform?coefficients?for
%????each?block.??This?transform?can?be?inverted?using?IBDCT.
%
%????B?=?BDCT（AN）?computes?DCT2?transform?of?A?in?blocks?of?size?NxN.

%?Phil?Sallee?9/03

function?b?=?bdct（an）

if?（nargin???n?=?8;
end

%?generate?the?matrix?for?the?full?2D?DCT?transform?（both?directions）
dctm?=?bdctmtx（n）;

%?reshape?image?into?blocks?multiply?and?reshape?back
[vrc]?=?im2vec（an）;
b?=?vec2im（dctm*v0nrc）;

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

?????文件?????????75??2013-06-30?11:07??說(shuō)明.txt

?????文件????????614??2013-02-28?21:25??jpegtbx_1.4\bdct.m

?????文件????????506??2013-02-28?21:25??jpegtbx_1.4\bdctmtx.m

?????文件????????563??2013-02-28?21:25??jpegtbx_1.4\dequantize.m

?????文件????????638??2013-02-28?21:25??jpegtbx_1.4\ibdct.m

?????文件???????1552??2013-02-28?21:25??jpegtbx_1.4\im2vec.m

?????文件????1315292??2013-06-30?10:08??jpegtbx_1.4\jpeg.lib

?????文件?????????80??2013-02-28?21:25??jpegtbx_1.4\jpegConvert.asv

?????文件?????????96??2013-02-28?21:25??jpegtbx_1.4\jpegConvert.m

?????文件?????510360??2013-02-28?21:25??jpegtbx_1.4\JPEGOBJ.mat

?????文件???????2462??2013-02-28?21:25??jpegtbx_1.4\jpeg_qtable.m

?????文件??????14232??2013-02-28?21:25??jpegtbx_1.4\jpeg_read.asv

?????文件??????14232??2013-02-28?21:25??jpegtbx_1.4\jpeg_read.c

?????文件??????65536??2013-02-28?21:25??jpegtbx_1.4\jpeg_read.dll

?????文件????????474??2013-02-28?21:25??jpegtbx_1.4\jpeg_read.m

?????文件??????66560??2013-06-30?10:08??jpegtbx_1.4\jpeg_read.mexw64

?????文件??????12714??2013-02-28?21:25??jpegtbx_1.4\jpeg_write.c

?????文件??????57344??2013-02-28?21:25??jpegtbx_1.4\jpeg_write.dll

?????文件????????430??2013-02-28?21:25??jpegtbx_1.4\jpeg_write.m

?????文件??????66048??2013-06-30?10:09??jpegtbx_1.4\jpeg_write.mexw64

?????文件????????521??2013-02-28?21:25??jpegtbx_1.4\quantize.m

?????文件??????12787??2013-02-28?21:25??jpegtbx_1.4\README

?????文件???????5770??2013-02-28?21:25??jpegtbx_1.4\testorig.jpg

?????文件???????1569??2013-02-28?21:25??jpegtbx_1.4\vec2im.m

?????目錄??????????0??2013-06-30?11:04??jpegtbx_1.4

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

??????????????2150455????????????????????25