function?out?=?dcTransform（input）?

????input?=?double（input）;
????for?i?=?1:8
????????for?j?=?1:8
????????????output（i?j）?=?input（i?j）?-?128.0;
????????end
????end

????for?i?=?1:8
????????tmp0?=?output（i?1）?+?output（i?8）;
????????tmp7?=?output（i?1）?-?output（i?8）;
????????tmp1?=?output（i?2）?+?output（i?7）;
????????tmp6?=?output（i?2）?-?output（i?7）;
????????tmp2?=?output（i?3）?+?output（i?6）;
????????tmp5?=?output（i?3）?-?output（i?6）;
????????tmp3?=?output（i?4）?+?output（i?5）;
????????tmp4?=?output（i?4）?-?output（i?5）;

????????tmp10?=?tmp0?+?tmp3;
????????tmp13?=?tmp0?-?tmp3;
????????tmp11?=?tmp1?+?tmp2;
????????tmp12?=?tmp1?-?tmp2;

????????output（i?1）?=?tmp10?+?tmp11;
????????output（i?5）?=?tmp10?-?tmp11;

????????z1?=?（tmp12?+?tmp13）?*?0.707106781;
????????output（i?3）?=?tmp13?+?z1;
????????output（i?7）?=?tmp13?-?z1;

????????tmp10?=?tmp4?+?tmp5;
????????tmp11?=?tmp5?+?tmp6;
????????tmp12?=?tmp6?+?tmp7;

????????z5?=?（tmp10?-?tmp12）?*?0.382683433;
????????z2?=?0.541196100?*?tmp10?+?z5;
????????z4?=?1.306562965?*?tmp12?+?z5;
????????z3?=?tmp11?*?0.707106781;

????????z11?=?tmp7?+?z3;
????????z13?=?tmp7?-?z3;

????????output（i?6）?=?z13?+?z2;
????????output（i?4）?=?z13?-?z2;
????????output（i?2）?=?z11?+?z4;
????????output（i?8）?=?z11?-?z4;
????end

????for?i=1:8
????????tmp0?=?output（1?i）?+?output（8?i）;
????????tmp7?=?output（1?i）?-?output（8?i）;
????????tmp1?=?output（2?i）?+?output（7?i）;
????????tmp6?=?output（2?i）?-?output（7?i）;
????????tmp2?=?output（3?i）?+?output（6?i）;
????????tmp5?=?output（3?i）?-?output（6?i）;
????????tmp3?=?output（4?i）?+?output（5?i）;
????????tmp4?=?output（4?i）?-?output（5?i）;

????????tmp10?=?tmp0?+?tmp3;
????????tmp13?=?tmp0?-?tmp3;
????????tmp11?=?tmp1?+?tmp2;
????????tmp12?=?tmp1?-?tmp2;

????????output（1?i）?=?tmp10?+?tmp11;
????????output（5?i）?=?tmp10?-?tmp11;

????????z1?=?（tmp12?+?tmp13）?*?0.707106781;
????????output（3?i）?=?tmp13?+?z1;
????????output（7?i）?=?tmp13?-?z1;

????????tmp10?=?tmp4?+?tmp5;
????????tmp11?=?tmp5?+?tmp6;
????????tmp12?=?tmp6?+?tmp7;

????????z5?=?（tmp10?-?tmp12）?*?0.382683433;
????????z2?=?0.541196100?*?tmp10?+?z5;
????????z4?=?1.306562965?*?tmp12?+?z5;
????????z3?=?tmp11?*?0.707106781;

????????z11?=?tmp7?+?z3;
????????z13?=?tmp7?-?z3;

????????output（6?i）?=?z13?+?z2;
????????output（4?i）?=?z13?-?z2;
????????output（2?i）?=?z11?+?z4;
????????output（8?i）?=?z11?-?z4;
????end

????out?=?output;

end

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2020-03-25?21:13??MATLAB-Jpeg-encoder-master\
?????文件???????17462??2020-03-25?21:02??MATLAB-Jpeg-encoder-master\1.png
?????文件?????????239??2014-07-08?03:49??MATLAB-Jpeg-encoder-master\README.md
?????文件????????2418??2014-07-08?03:49??MATLAB-Jpeg-encoder-master\dcTransform.m
?????文件????????6154??2014-07-08?03:49??MATLAB-Jpeg-encoder-master\easy_encoder.m
?????文件??????480667??2014-07-08?03:49??MATLAB-Jpeg-encoder-master\grid.png
?????文件????????2259??2020-03-25?21:09??MATLAB-Jpeg-encoder-master\huffman.m
?????文件????????6043??2014-07-08?03:49??MATLAB-Jpeg-encoder-master\jpeg_encoder.m
?????文件????????8621??2020-03-25?21:13??MATLAB-Jpeg-encoder-master\main.m
?????目錄???????????0??2020-03-25?21:06??MATLAB-Jpeg-encoder-master\out\
?????文件???????72498??2014-07-08?03:49??MATLAB-Jpeg-encoder-master\out\600px-JPEG_ZigZag.svg.png
?????文件????????5623??2014-07-08?03:49??MATLAB-Jpeg-encoder-master\out\Dctjpeg.png
?????文件?????1397512??2014-07-08?03:49??MATLAB-Jpeg-encoder-master\out\RGB.png
?????文件??????786486??2014-07-08?03:49??MATLAB-Jpeg-encoder-master\out\Test.bmp
?????文件?????1206222??2014-07-08?03:49??MATLAB-Jpeg-encoder-master\out\YCbCr.png
?????文件??????172856??2014-07-08?03:49??MATLAB-Jpeg-encoder-master\out\block1.bmp
?????目錄???????????0??2020-03-25?21:06??MATLAB-Jpeg-encoder-master\out\difference\
?????文件??????566361??2014-07-08?03:49??MATLAB-Jpeg-encoder-master\out\difference\10.png
?????文件??????845668??2014-07-08?03:49??MATLAB-Jpeg-encoder-master\out\difference\100.png
?????文件??????906866??2014-07-08?03:49??MATLAB-Jpeg-encoder-master\out\difference\1002.png
?????文件??????889953??2014-07-08?03:49??MATLAB-Jpeg-encoder-master\out\difference\1003.png
?????文件??????699537??2014-07-08?03:49??MATLAB-Jpeg-encoder-master\out\difference\102.png
?????文件??????708747??2014-07-08?03:49??MATLAB-Jpeg-encoder-master\out\difference\103.png
?????文件??????687705??2014-07-08?03:49??MATLAB-Jpeg-encoder-master\out\difference\30.png
?????文件??????833785??2014-07-08?03:49??MATLAB-Jpeg-encoder-master\out\difference\302.png
?????文件??????833326??2014-07-08?03:49??MATLAB-Jpeg-encoder-master\out\difference\303.png
?????文件??????746740??2014-07-08?03:49??MATLAB-Jpeg-encoder-master\out\difference\50.png
?????文件??????894902??2014-07-08?03:49??MATLAB-Jpeg-encoder-master\out\difference\502.png
?????文件??????893946??2014-07-08?03:49??MATLAB-Jpeg-encoder-master\out\difference\503.png
?????文件??????856136??2014-07-08?03:49??MATLAB-Jpeg-encoder-master\out\difference\80.png
?????文件?????1015242??2014-07-08?03:49??MATLAB-Jpeg-encoder-master\out\difference\802.png
............此處省略85個文件信息