 | 
|
 |
 |
 |
 |
 |
 |
 |
jpeg.pro | ||||||
 | ||||||
| jpeg | JPEG File Interchange Format 1.02, 1992/09/01, Eric Hamilton & ISO/IEC 10918-1 : 1993(E) | |||||
| ||||||
| ||||||
| ||||||
| jpeg_standalone | ||||||
| ||||||
| field -marker | |
|
sparelist | |
||
| ||||||
| ||||||
| ||||||
| jpeg_unknown | ||||||
| ||||||
| field -marker | |
|
samelist | 0xFF01 | |
|
| ||||||
| field -length | |
|
integer | |
||
| ||||||
| field -data | |
|
blob | |
||
| ||||||
| ||||||
| ||||||
| jpeg_SOFn | ||||||
| ||||||
| field -marker | |
|
samelist | 0xFFC0 | |
|
| ||||||
| field -length | |
|
integer | |
||
| ||||||
| field -precision | |
|
integer | |
sample precision | |
| ||||||
| field -y | |
|
integer | |
number of lines | |
| ||||||
| field -x | |
|
integer | |
number of samples per line | |
| ||||||
| field -nf | |
|
integer | |
number of image components in frame | |
| ||||||
| fieldarray -components | |
|
mapper(jpeg_SOFn_component) | |
||
| ||||||
| ||||||
| ||||||
| jpeg_SOFn_component | ||||||
| ||||||
| field -c | |
|
integer | |
component identifier | |
| ||||||
| field -h | |
|
integer | |
horizontal sampling factor | |
| ||||||
| field -v | |
|
integer | |
vertical sampling factor | |
| ||||||
| field -tq | |
|
integer | |
quantization table destination selector | |
| ||||||
| ||||||
| ||||||
| jpeg_SOS | ||||||
| ||||||
| field -marker | |
|
samelist | 0xFFC0 | |
|
| ||||||
| field -length | |
|
integer | |
||
| ||||||
| field -ns | |
|
integer | |
number of image components in scan | |
| ||||||
| fieldarray -components | |
|
mapper(jpeg_SOS_component) | |
||
| ||||||
| field -ss | |
|
integer | |
start of spectral or predictor selection | |
| ||||||
| field -se | |
|
integer | |
end of spectral selection | |
| ||||||
| field -a | |
|
integer | |
successive approximation bit position high + successive approximation bit position low or point transform | |
| ||||||
| ||||||
| ||||||
| jpeg_SOS_component | ||||||
| ||||||
| field -c | |
|
integer | |
scan component selector | |
| ||||||
| field -td | |
|
integer | |
DC entropy coding table destination selector | |
| ||||||
| field -ta | |
|
integer | |
AC entropy coding table destination selector | |
| ||||||
| ||||||
| ||||||
| jpeg_DQT | ||||||
| ||||||
| field -marker | |
|
samelist | 0xFFDB | |
|
| ||||||
| field -length | |
|
integer | |
||
| ||||||
| field -pq | |
|
integer | |
quantization table element precision | |
| ||||||
| field -tq | |
|
integer | |
quantization table destination identifier | |
| ||||||
| fieldarray -qk | |
|
integer | |
quantization table element | |
| ||||||
| ||||||
| ||||||
| jpeg_APPn | JPEG File Interchange Format 1.02, 1992/09/01, Eric Hamilton | |||||
| ||||||
| field -marker | |
|
samelist | 0xFFE0 | |
|
| ||||||
| field -length | |
|
integer | |
length | |
| ||||||
| field -identifier | |
|
string(fixed) | 'JFIF\0' | |
identifier |
| ||||||
| field -data | |
|
strswitch | 'JFIF\0' | |
|
| ||||||
| ||||||
| ||||||
| jpeg_jfif | ||||||
| ||||||
| field -version | |
|
integer | 0x0102 | |
version |
| ||||||
| field -units | |
|
list | |
units for X and Y densities | |
| ||||||
| field -Xdensity | |
|
integer | |
Horizontal pixel density | |
| ||||||
| field -Ydensity | |
|
integer | |
Vertical pixel density | |
| ||||||
| field -Xthumbnail | |
|
integer | |
Thumbnail horizontal pixel count | |
| ||||||
| field -Ythumbnail | |
|
integer | |
Thumbnail vertical pixel count | |
| ||||||
| fieldarray -thumbnail | |
|
integer | |
Packed (24-bits) RGB values for thumbnail pixel | |
| ||||||
| ||||||
| ||||||
| jpeg_jfxx | ||||||
| ||||||
| field -code | |
|
list | 0x10 | |
version |
| ||||||
| ||||||
| ||||||
| jpeg_COM | ||||||
| ||||||
| field -marker | |
|
samelist | 0xFFFE | |
|
| ||||||
| field -length | |
|
integer | |
||
| ||||||
| field -text | |
|
string(fixed) | |
||
| ||||||
| ||||||
| ||||||
| jpeg_DHT | ||||||
| ||||||
| field -marker | |
|
samelist | 0xFFC4 | |
|
| ||||||
| field -length | |
|
integer | |
||
| ||||||
| field -tc | |
|
list | |
table class | |
| ||||||
| field -th | |
|
integer | |
Huffman table destination identifier | |
| ||||||
| fieldarray -l | |
|
integer | |
number of Huffman codes of length i | |
| ||||||
| field -v | |
|
blob | |
value associated with each Huffman code | |
| ||||||
| ||||||
Copyright © 2000 Laurent Riesterer.
Last modified on Aug 8, 2002.