Collapse All Expand All

The following JPEG marker segments metadata are supported:

Frame Marker Segment Level

SOF0, SOF1, SOF2 and SOF3 (read only)

Name	Id	Type	Value Type	Value	Value Length	Read Only
<Frame marker name>	<Frame marker Id>	LEVEL_START	0	NULL	0	True
<Frame marker size tag name>	<Frame marker size tag Id>	VALUE_ITEM	UINT16		1	True
"Precision"	212	VALUE_ITEM	UINT8		1	True
"Lines"	213	VALUE_ITEM	UINT16		1	True
"SamplesPerLine"	214	VALUE_ITEM	UINT16		1	True
"ComponentNumber"	215	VALUE_ITEM	UINT8	<n>	1	True
Frame component level 1
Frame component level <n>
<Frame marker name>	<Frame marker Id>	LEVEL_END	0	NULL	0	True

<Frame marker Id>, <Frame marker name>, <Frame marker size tag name>, and <Frame marker size tag Id> are described in the table below:

Frame Marker	<Frame Marker Name>	<Frame Marker Id>	<Frame Marker Size Tag Name>	<Frame Marker Size Tag Id>
SOF0	"SOF0"	0xFFC0	"SOF0_DATASIZE"	60192
SOF1	"SOF1"	0xFFC1	"SOF1_DATASIZE"	60193
SOF2	"SOF2"	0xFFC2	"SOF2_DATASIZE"	60194
SOF3	"SOF3"	0xFFC3	"SOF3_DATASIZE"	60195

Frame Component Level

Name	Id	Type	Value Type	Value	Value Length	Read Only
"Component"	<Component No.>	LEVEL_START	0	NULL	0	True
"Id"	<Component No.>	VALUE_ITEM	UINT		1	True
"MCU_HV"	<Component No.>	VALUE_ITEM	UINT		1	True
"QuantizationNumber"	<Component No.>	VALUE_ITEM	UINT		1	True
"Component"	<Component No.>	LEVEL_END	0	NULL	0	True

Scan Marker Segment Level

SOS (read only)

Name	Id	Type	Value Type	Value	Value Length	Read Only
"SOS"	0xFFDA	LEVEL_START	0	NULL	0	True
"SOS_DATASIZE"	60218	VALUE_ITEM	UINT16		1	True
"ComponentNumber"	228	VALUE_ITEM	UINT8	<n>	1	True
Scan component level 1
Scan component level <n>
"SpectralStart"	235	VALUE_ITEM	UINT8		1	True
"SpectralEnd"	236	VALUE_ITEM	UINT8			True
"AH_AL"	237	VALUE_ITEM	UINT8			True
"SOS"	0xFFDA	LEVEL_START	0	NULL	0	True

Scan Component Level

Name	Id	Type	Value Type	Value	Value Length	Read Only
"Component"	<Component No.>	LEVEL_START	0	NULL	0	True
"Selector"	<Component No.>	VALUE_ITEM	UINT8		1	True
"DC_AC"	<Component No.>	VALUE_ITEM	UINT8		1	True
"Component"	<Component No.>	LEVEL_END	0	NULL	0	True

Define-Quantization-Table Marker Segment Level

DQT (read only)

Name	Id	Type	Value Type	Value	Value Length	Read Only
"DQT"	0xFFDB	LEVEL_START	0	NULL	0	True
"DQT_DATASIZE"	60219	VALUE_ITEM	UINT16		1	True
"QuantizationTable"	<table 1 Id >	VALUE_ITEM	UINT8 or UINT16		64	True
"QuantizationTable"	<table 1 Id >	VALUE_ITEM	UINT8 or UINT16		64	True
"DQT"	0xFFDB	LEVEL_END	0	NULL	0	True

Define-Huffman-Tables Marker Segment Level

DHT (read only)

Name	Id	Type	Value Type	Value	Value Length	Read Only
"DHT"	0xFFC4	LEVEL_START	0	NULL	0	True
"DHT_DATASIZE"	60196	VALUE_ITEM	UINT16		1	True
"DATA"	0xFFC4	VALUE_ITEM	RAW_DATA		<ValueSize>	True
"DHT"	0xFFC4	LEVEL_END	0	NULL	0	True

Comment Marker Segment Level

COM (read/write)

Name	Id	Type	Value Type	Value	Value Length	Read Only
"COM"	0xFFFE	LEVEL_START	0	NULL	0	True
"COM_DATASIZE"	60254	VALUE_ITEM	UINT16		1	True
"Comment"	0xFFFE	VALUE_ITEM	STRING		<ValueSize>	True
"COM"	0xFFFE	LEVEL_END	0	NULL	0	True

Application Marker Segment Level

APP0-APP15 (read/write)

There are several application marker segments, which data structure is well known. These segments are parsed and their data are passed in special format.

These marker segments are:

JFIF APP0 Segment

Name	Id	Type	Value Type	Value	Value Length	Read Only
"APP0"	0xFFE0	LEVEL_START	0	NULL	0	True
"APP0_DATASIZE"	60224	VALUE_ITEM	UINT16		1	False
"JFIF_HEADER"	200	VALUE_ITEM	STRING	JFIF	5	True
"Version"	201	VALUE_ITEM	UINT16		1	False
"ResolutionUnits"	202	VALUE_ITEM	UINT8		1	False
"ResolutionX"	203	VALUE_ITEM	UINT16		1	False
"ResolutionY"	204	VALUE_ITEM	UINT16		1	False
"ThumbnailWidth"1	205	VALUE_ITEM	UINT8		1	True
"ThumbnailHeight"2	206	VALUE_ITEM	UINT8		1	True
"APP0"	0xFFE0	LEVEL_END	0	NULL	0	True

1 The thumbnail width tags are present only if the thumbnail is stored to JFIF segment. 2 The thumbnail height tags are present only if the thumbnail is stored to JFIF segment.

JFIF Extension (JFXX) APP0 Segment

Name	Id	Type	Value Type	Value	Value Length	Read Only
"APP0"	0xFFE0	LEVEL_START	0	NULL	0	True
"APP0_DATASIZE"	60224	VALUE_ITEM	UINT16		1	True
"JFIF_EX_HEADER"	209	VALUE_ITEM	STRING	"JFXX"	5	True
"ExtensionCode"	210	VALUE_ITEM	UINT8		1	True
"APP0"	0xFFE0	LEVEL_END	0	NULL	0	True

Photoshop Image Resource APP13 Marker Segment

Name	Id	Type	Value Type	Value	Value Length	Read Only
"APP13"	0xFFED	LEVEL_START	0	NULL	0	True
"APP13_DATASIZE"	60237	VALUE_ITEM	UINT16		1	False
"PHOTOSHOP_HEADER"	59915	VALUE_ITEM	STRING	"Photoshop 3.0"	14	False
Photoshop Image Resource level 1
...
Photoshop Image Resource level n
"APP13"	0xFFED	LEVEL_END	0	NULL	0	True

Other Application Marker Segment Levels

Name	Id	Type	Value Type	Value	Value Length	Read Only
<Marker name>	<Marker Id>	LEVEL_START	0	NULL	0	True
<Marker size tag name>	<Marker size tag Id>	VALUE_ITEM	UINT16		1	False
"DATA"	<Marker Id>	VALUE_ITEM	RAW_DATA		<ValueSize>	False
<Marker name>	<Marker Id>	LEVEL_END	0	NULL	0	True

<Marker Id>, <Marker name>, <Marker size tag name>, and <Marker size tag Id> are in table below:

Marker	<Marker Name>	<Marker Id>	<Marker Size Tag Name>	<Marker Size Tag Id>
APP0	"APP0"	0xFFE0	"APP0_DATASIZE"	60224
APP1	"APP1"	0xFFE1	"APP1_DATASIZE"	60225
APP2	"APP2"	0xFFE2	"APP2_DATASIZE"	60226
APP3	"APP3"	0xFFE3	"APP3_DATASIZE"	60227
APP4	"APP4"	0xFFE4	"APP4_DATASIZE"	60228
APP5	"APP5"	0xFFE5	"APP5_DATASIZE"	60229
APP6	"APP6"	0xFFE6	"APP6_DATASIZE"	60230
APP7	"APP7"	0xFFE7	"APP7_DATASIZE"	60231
APP8	"APP8"	0xFFE8	"APP8_DATASIZE"	60232
APP9	"APP9"	0xFFE9	"APP9_DATASIZE"	60233
APP10	"APP10"	0xFFEA	"APP10_DATASIZE"	60234
APP11	"APP11"	0xFFEB	"APP11_DATASIZE"	60235
APP12	"APP12"	0xFFEC	"APP12_DATASIZE"	60236
APP13	"APP13"	0xFFED	"APP13_DATASIZE"	60237
APP14	"APP14"	0xFFEE	"APP14_DATASIZE"	60238
APP15	"APP15"	0xFFEF	"APP15_DATASIZE"	60239

 

 

---

©2016. Accusoft Corporation. All Rights Reserved.

Send Feedback