JPEG 静态图像压缩

各文件功能说明如下：

1)　　JPEG压缩程序：gendat.exe

2)　　为压缩后的数据加上JPEG文件头的程序genjpg.exe

3)　　解JEPG压缩程序extrdat.exe

其中：（1）的输入参量是需要生成的压缩文件的名字。

主程序流程为：

a)　　程序初始化，读取文件名称、原始图像数据等基本数据；

b)　　从AC.TAB和DC.TAB两个文件生成AC表和DC表，存入数组

c)　　以8×8为样本单位进行DCT变换

d)　　以8×8为样本单位进行量化

e)　　以8×8为样本单位进行Z形扫描

f)　　以8×8为样本单位进行熵编码

g)　　以8×8为样本单位进行解量化

h)　　以8×8为样本单位进行IDCT变换

-JPEG still image compression

Function of the documents as follows:

1) JPEG compression process: gendat.exe

2) For the compressed JPEG file header data, together with the procedures genjpg.exe

3) The solution JEPG compression program extrdat.exe

Of which: (1) the input parameters is the need to generate the compressed file s name.

The main program flow is:

a) procedures for initialization, read the file name, the original image data and other basic data

b) From the AC.TAB and DC.TAB two file generation AC table and DC table, into an array of

c) with 8 × 8 sample units for the DCT-

d) to 8 × 8 for the sample unit to quantify

e) to 8 × 8 for the sample units of Z-scan

f) to 8 × 8 for the sample units of entropy coding

g) to 8 × 8 for the sample unit to extract the quantitative

h) with 8 × 8 for the sample units IDCT transform