資源簡介
ac_decode.m 對AC系數(shù)進行Huffman解碼
ac_encode.m 對AC系數(shù)進行Huffman編碼
bin2int.m 將二進制數(shù)轉(zhuǎn)化成整數(shù)
dc_decode.m 對DC系數(shù)進行Huffman解碼
dc_encode.m 對DC系數(shù)進行Huffman編碼
dec2bit.m 將十進制數(shù)轉(zhuǎn)換為制定位數(shù)的二進制碼流
dez.m ZigZag掃描
divq.m 對輸入矩陣進行量化
dpcm.m 差分預測編碼
int2bin.m 將輸入整數(shù)轉(zhuǎn)換為二進制數(shù)
idivq.m 反量化
jpeg_decode.m 解碼的可執(zhí)行程序
jpeg_encode.m 編碼的可執(zhí)行程序
其中jpeg_encode.m和jpeg_decode.m分別是編碼和解碼的可執(zhí)行程序。直接運行這兩個程序就可以得到壓縮比和峰值信噪比。可修改兩個程序中的路徑改變被壓縮的照片。

代碼片段和文件信息
function?x=ac_decode(y)
%對交流分量進行解碼
%?霍夫曼碼表結(jié)構(gòu)
%?游程-編碼序號-碼長-基本編碼長度-基本編碼
table=[...
?0??1???3??2?0?0?0?0?0?0?0?0?0?0?0?0?0?0?0?0
?0??2???4??2?0?1?0?0?0?0?0?0?0?0?0?0?0?0?0?0
?0??3???6??3?1?0?0?0?0?0?0?0?0?0?0?0?0?0?0?0?
?0??4???8??4?1?0?1?1?0?0?0?0?0?0?0?0?0?0?0?0
?0??5??10??5?1?1?0?1?0?0?0?0?0?0?0?0?0?0?0?0?
?0??6??12??6?1?1?1?0?0?0?0?0?0?0?0?0?0?0?0?0?
?0??7??14??7?1?1?1?1?0?0?0?0?0?0?0?0?0?0?0?0?
?0??8??18?10?1?1?1?1?1?1?0?1?1?0?0?0?0?0?0?0
?0??9??25?16?1?1?1?1?1?1?1?1?1?0?0?0?0?0?1?0
?0?10??26?16?1?1?1?1?1?1?1?1?1?0?0?0?0?0?1?1
?1??1???5??4?1?1?0?0?0?0?0?0?0?0?0?0?0?0?0?0?
?1??2???8??6?1?1?1?0?0?1?0?0?0?0?0?0?0?0?0?0?
?1??3??10??7?1?1?1?1?0?0?1?0?0?0?0?0?0?0?0?0
?1??4??13??9?1?1?1?1?1?0?1?1?0?0?0?0?0?0?0?0
?1??5??16?11?1?1?1?1?1?1?1?0?1?1?0?0?0?0?0?0
?1??6??22?16?1?1?1?1?1?1?1?1?1?0?0?0?0?1?0?0
?1??7??23?16?1?1?1?1?1?1?1?1?1?0?0?0?0?1?0?1
?1??8??24?16?1?1?1?1?1?1?1?1?1?0?0?0?0?1?1?0
?1??9??25?16?1?1?1?1?1?1?1?1?1?0?0?0?0?1?1?1
?1?10??26?16?1?1?1?1?1?1?1?1?1?0?0?0?1?0?0?0
?2??1???6??5?1?1?0?1?1?0?0?0?0?0?0?0?0?0?0?0?
?2??2??10??8?1?1?1?1?1?0?0?0?0?0?0?0?0?0?0?0
?2??3??13?10?1?1?1?1?1?1?0?1?1?1?0?0?0?0?0?0?
?2??4??20?16?1?1?1?1?1?1?1?1?1?0?0?0?1?0?0?1
?2??5??21?16?1?1?1?1?1?1?1?1?1?0?0?0?1?0?1?0
?2??6??22?16?1?1?1?1?1?1?1?1?1?0?0?0?1?0?1?1
?2??7??23?16?1?1?1?1?1?1?1?1?1?0?0?0?1?1?0?0
?2??8??24?16?1?1?1?1?1?1?1?1?1?0?0?0?1?1?0?1
?2??9??25?16?1?1?1?1?1?1?1?1?1?0?0?0?1?1?1?0
?2?10??26?16?1?1?1?1?1?1?1?1?1?0?0?0?1?1?1?1
?3??1???7??6?1?1?1?0?1?0?0?0?0?0?0?0?0?0?0?0
?3??2??11??9?1?1?1?1?1?0?1?1?1?0?0?0?0?0?0?0
?3??3??14?11?1?1?1?1?1?1?1?0?1?1?1?0?0?0?0?0?
?3??4??20?16?1?1?1?1?1?1?1?1?1?0?0?1?0?0?0?0
?3??5??21?16?1?1?1?1?1?1?1?1?1?0?0?1?0?0?0?1
?3??6??22?16?1?1?1?1?1?1?1?1?1?0?0?1?0?0?1?0
?3??7??23?16?1?1?1?1?1?1?1?1?1?0?0?1?0?0?1?1
?3??8??24?16?1?1?1?1?1?1?1?1?1?0?0?1?0?1?0?0
?3??9??25?16?1?1?1?1?1?1?1?1?1?0?0?1?0?1?0?1
?3?10??26?16?1?1?1?1?1?1?1?1?1?0?0?1?0?1?1?0
?4??1???7??6?1?1?1?0?1?1?0?0?0?0?0?0?0?0?0?0
?4??2??12?10?1?1?1?1?1?1?1?0?0?0?0?0?0?0?0?0?
?4??3??19?16?1?1?1?1?1?1?1?1?1?0?0?1?0?1?1?1
?4??4??20?16?1?1?1?1?1?1?1?1?1?0?0?1?1?0?0?0
?4??5??21?16?1?1?1?1?1?1?1?1?1?0?0?1?1?0?0?1
?4??6??22?16?1?1?1?1?1?1?1?1?1?0?0?1?1?0?1?0
?4??7??23?16?1?1?1?1?1?1?1?1?1?0?0?1?1?0?1?1
?4??8??24?16?1?1?1?1?1?1?1?1?1?0?0?1?1?1?0?0
?4??9??25?16?1?1?1?1?1?1?1?1?1?0?0?1?1?1?0?1
?4?10??26?16?1?1?1?1?1?1?1?1?1?0?0?1?1?1?1?0
?5??1???8??7?1?1?1?1?0?1?0?0?0?0?0?0?0?0?0?0
?5??2??12?10?1?1?1?1?1?1?1?0?0?1?0?0?0?0?0?0?
?5??3??19?16?1?1?1?1?1?1?1?1?1?0?0?1?1?1?1?1
?5??4??20?16?1?1?1?1?1?1?1?1?1?0?1?0?0?0?0?0
?5??5??21?16?1?1?1?1?1?1?1?1?1?0?1?0?0?0?0?1
?5??6??22?16?1?1?1?1?1?1?1?1?1?0?1?0?0?0?1?0
?5??7??23?16?1?1?1?1?1?1?1?1?1?0?1?0?0?0?1?1
?5??8??24?16?1?1?1?1?1?1?1?1?1?0?1?0?0?1?0?0
?5??9??25?16?1?1?1?1?1?1?1?1?1?0?1?0?0?1?0?1
?5?10??26?16?1?1?1?1?1?1?1?1?1?0?1?0?0?1?1?0
?6??1???8??7?1?1?1?1?0?1?1?0?0?0?0?0?0?0?0?0
?6??2??13?11?1?1?1?1?1?1?1?1?0?0?0?0?0?0?0?0?
?6??3??19?16?1?1?1?1?1?1?1?1?1?0?1?0?0?1?1?1
?6
?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2015-11-28?20:31??jpeg\
?????文件????????5174??2015-11-26?20:16??jpeg\01_SUV.bmp
?????文件????????5174??2015-11-26?20:18??jpeg\02_tank.bmp
?????文件????????5174??2015-11-26?20:20??jpeg\03_airplane.bmp
?????文件????????5174??2015-11-26?20:21??jpeg\04_basketball.bmp
?????文件????????5174??2015-11-26?20:23??jpeg\05_soccer.bmp
?????文件????????5174??2015-11-26?20:24??jpeg\06_Coke.bmp
?????文件????????5174??2015-11-26?20:25??jpeg\07_cat.bmp
?????文件????????5174??2015-11-26?20:27??jpeg\08_cellphone.bmp
?????文件????????5174??2015-11-26?20:29??jpeg\09_jiaozi.bmp
?????文件????????5174??2015-11-26?20:30??jpeg\10_logo.bmp
?????文件????????8193??2010-11-13?17:37??jpeg\ac_decode.m
?????文件????????8134??2010-11-13?17:35??jpeg\ac_encode.m
?????文件?????????236??2010-11-13?17:50??jpeg\bin2int.m
?????文件?????????360??2015-11-29?18:34??jpeg\compressdata.bin
?????文件????????1502??2010-11-12?21:34??jpeg\dc_decode.m
?????文件?????????618??2010-11-13?12:58??jpeg\dc_encode.m
?????文件?????????290??2010-11-13?13:35??jpeg\dec2bit.m
?????文件?????????344??2010-11-13?17:46??jpeg\dez.m
?????文件??????????50??2010-11-13?17:18??jpeg\divq.m
?????文件?????????339??2010-11-13?17:17??jpeg\dpcm.m
?????文件??????????48??2010-11-13?17:48??jpeg\idivq.m
?????文件?????????414??2010-11-13?13:00??jpeg\int2bin.m
?????文件????????1901??2015-11-28?20:20??jpeg\jpeg_decode.m
?????文件????????1969??2015-11-28?20:20??jpeg\jpeg_encode.m
?????文件?????????593??2015-11-28?20:31??jpeg\readme.txt
?????文件???????48614??2015-11-28?20:33??原理框圖及性能分析.doc
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