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GDAL库三个读取Jpeg2000格式驱动测试

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11/28
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0、目的

GDAL库中提供了四五种读取Jpeg2000的驱动，但是各个驱动读取数据的效率各不相同，下面就针对三种读取jpeg2000的效率进行测试。

GDAL库中提供的读取Jpeg2000的驱动有下面六个，具体的说明请移步GDAL官网查看。地址为：http://www.gdal.org/formats_list.html。

  1. JPEG2000 — Implementation of the JPEG-2000 part 1
  2. JP2ECW – ERDAS JPEG2000 (.jp2)
  3. JP2KAK – JPEG-2000 (based on Kakadu)
  4. JP2OpenJPEG — JPEG2000 driver based on OpenJPEG library
  5. JPIPKAK - JPIP Streaming

    以上的所有的库默认编译都是没有的，都需要第三方库的支持，由于我只找到了1、2、4，所以就对这三种的读取效率进行测试。

1、 测试方式

使用一个全球1km的DEM数据（globaldem2.jp2）进行测试，经过Jpeg2000压缩后的大小为52MB。使用的测试工具为gdalinfo，为了能够体现数据读取的效率，添加了-checksum来计算图像的检验码，并且为了防止显示的内容过多而禁止输出元数据和栅格属性表内容。在测试的过程中，需要将另外的驱动进行禁用，这里使用CPL_SKIP进行设置。具体代码如下，同时为了能够显示处理时间，增加了输出时间的命令： 

echo  %date% %time%

gdalinfo.exe -checksum -nomd -norat globaldem2.jp2 --config CPL_SKIP "JP2ECW JP2OpenJPEG"

echo  %date% %time%

2、测试步骤

2.1、检查驱动

使用gdalinfo.exe –formats输出支持的驱动，检查是否能够正常加载上述三种驱动。输出的内容如下，为了便于查找，我在三种Jpeg2000的驱动结尾加了 **** 进行标识。 

F:\RsSrcDir\binX64>gdalinfo.exe --formats

Supported Formats:

  ECW (rov): ERDAS Compressed Wavelets (SDK 4.2)

  JP2ECW (rov): ERDAS JPEG2000 (SDK 4.2) ******

  HDF4 (ros): Hierarchical Data Format Release 4

  HDF4Image (rw+): HDF4 Dataset

  HDF5 (ros): Hierarchical Data Format Release 5

  HDF5Image (ro): HDF5 Dataset

  MG4Lidar (ro): MrSID Generation 4 / Lidar (.sid)

  MrSID (rov): Multi-resolution Seamless Image Database (MrSID)

  JP2MrSID (rov): MrSID JPEG2000

  netCDF (rw+s): Network Common Data Format

  GMT (rw): GMT NetCDF Grid Format

  VRT (rw+v): Virtual Raster

  GTiff (rw+vs): GeoTIFF

  NITF (rw+vs): National Imagery Transmission Format

  RPFTOC (rovs): Raster Product Format TOC format

  ECRGTOC (rovs): ECRG TOC format

  HFA (rw+v): Erdas Imagine Images (.img)

  SAR_CEOS (rov): CEOS SAR Image

  CEOS (rov): CEOS Image

  JAXAPALSAR (rov): JAXA PALSAR Product Reader (Level 1.1/1.5)

  GFF (rov): Ground-based SAR Applications Testbed File Format (.gff)

  ELAS (rw+v): ELAS

  AIG (rov): Arc/Info Binary Grid

  AAIGrid (rwv): Arc/Info ASCII Grid

  GRASSASCIIGrid (rov): GRASS ASCII Grid

  SDTS (rov): SDTS Raster

  DTED (rwv): DTED Elevation Raster

  PNG (rwv): Portable Network Graphics

  JPEG (rwv): JPEG JFIF

  MEM (rw+): In Memory Raster

  JDEM (rov): Japanese DEM (.mem)

  GIF (rwv): Graphics Interchange Format (.gif)

  BIGGIF (rov): Graphics Interchange Format (.gif)

  ESAT (rov): Envisat Image Format

  FITS (rw+): Flexible Image Transport System

  BSB (rov): Maptech BSB Nautical Charts

  XPM (rwv): X11 PixMap Format

  BMP (rw+v): MS Windows Device Independent Bitmap

  DIMAP (rov): SPOT DIMAP

  AirSAR (ro): AirSAR Polarimetric Image

  RS2 (ros): RadarSat 2 XML Product

  PCIDSK (rw+v): PCIDSK Database File

  PCRaster (rw): PCRaster Raster File

  ILWIS (rw+v): ILWIS Raster Map

  SGI (rw+): SGI Image File Format 1.0

  SRTMHGT (rwv): SRTMHGT File Format

  Leveller (rw+): Leveller heightfield

  Terragen (rw+): Terragen heightfield

  ISIS3 (rov): USGS Astrogeology ISIS cube (Version 3)

  ISIS2 (rw+v): USGS Astrogeology ISIS cube (Version 2)

  PDS (rov): NASA Planetary Data System

  TIL (rov): EarthWatch .TIL

  ERS (rw+v): ERMapper .ers Labelled

  JP2OpenJPEG (rwv): JPEG-2000 driver based on OpenJPEG library******

  L1B (rovs): NOAA Polar Orbiter Level 1b Data Set

  FIT (rwv): FIT Image

  GRIB (rov): GRIdded Binary (.grb)

  JPEG2000 (rwv): JPEG-2000 part 1 (ISO/IEC 15444-1)******

  RMF (rw+v): Raster Matrix Format

  WCS (rovs): OGC Web Coverage Service

  WMS (rwvs): OGC Web Map Service

  MSGN (ro): EUMETSAT Archive native (.nat)

  RST (rw+v): Idrisi Raster A.1

  INGR (rw+v): Intergraph Raster

  GSAG (rwv): Golden Software ASCII Grid (.grd)

  GSBG (rw+v): Golden Software Binary Grid (.grd)

  GS7BG (rw+v): Golden Software 7 Binary Grid (.grd)

  COSAR (ro): COSAR Annotated Binary Matrix (TerraSAR-X)

  TSX (rov): TerraSAR-X Product

  COASP (ro): DRDC COASP SAR Processor Raster

  R (rwv): R Object Data Store

  MAP (rov): OziExplorer .MAP

  PNM (rw+v): Portable Pixmap Format (netpbm)

  DOQ1 (rov): USGS DOQ (Old Style)

  DOQ2 (rov): USGS DOQ (New Style)

  ENVI (rw+v): ENVI .hdr Labelled

  EHdr (rw+v): ESRI .hdr Labelled

  GenBin (rov): Generic Binary (.hdr Labelled)

  PAux (rw+): PCI .aux Labelled

  MFF (rw+): Vexcel MFF Raster

  MFF2 (rw+): Vexcel MFF2 (HKV) Raster

  FujiBAS (ro): Fuji BAS Scanner Image

  GSC (rov): GSC Geogrid

  FAST (rov): EOSAT FAST Format

  BT (rw+v): VTP .bt (Binary Terrain) 1.3 Format

  LAN (rw+v): Erdas .LAN/.GIS

  CPG (ro): Convair PolGASP

  IDA (rw+): Image Data and Analysis

  NDF (rov): NLAPS Data Format

  EIR (rov): Erdas Imagine Raw

  DIPEx (rov): DIPEx

  LCP (rwv): FARSITE v.4 Landscape File (.lcp)

  GTX (rw+v): NOAA Vertical Datum .GTX

  LOSLAS (rov): NADCON .los/.las Datum Grid Shift

  NTv2 (rw+vs): NTv2 Datum Grid Shift

  CTable2 (rw+v): CTable2 Datum Grid Shift

  ACE2 (rov): ACE2

  SNODAS (rov): Snow Data Assimilation System

  KRO (rw+v): KOLOR Raw

  ARG (rwv): Azavea Raster Grid format

  RIK (ro): Swedish Grid RIK (.rik)

  USGSDEM (rwv): USGS Optional ASCII DEM (and CDED)

  GXF (ro): GeoSoft Grid Exchange Format

  HTTP (ro): HTTP Fetching Wrapper

  NWT_GRD (rov): Northwood Numeric Grid Format .grd/.tab

  NWT_GRC (rov): Northwood Classified Grid Format .grc/.tab

  ADRG (rw+vs): ARC Digitized Raster Graphics

  SRP (rovs): Standard Raster Product (ASRP/USRP)

  BLX (rw): Magellan topo (.blx)

  Rasterlite (rws): Rasterlite

  SAGA (rw+v): SAGA GIS Binary Grid (.sdat)

  KMLSUPEROVERLAY (rwv): Kml Super Overlay

  XYZ (rwv): ASCII Gridded XYZ

  HF2 (rwv): HF2/HFZ heightfield raster

  PDF (rw): Geospatial PDF

  OZI (rov): OziExplorer Image File

  CTG (rov): USGS LULC Composite Theme Grid

  E00GRID (rov): Arc/Info Export E00 GRID

  ZMap (rwv): ZMap Plus Grid

  NGSGEOID (rov): NOAA NGS Geoid Height Grids

  MBTiles (rov): MBTiles

  21At MBTiles (rov): 21At MBTiles

  IRIS (rov): IRIS data (.PPI, .CAPPi etc)

  WMTS (rwv): OGC Web Mab Tile Service

  CNSDTF (rwv): China Geospatial Data Transfer Grid Format (.grd)

  LANDSAT (rov): LANDSAT 7/8 GeoTiff with Metadata

2.2、测试JPEG2000 — Implementation of the JPEG-2000 part 1

使用上面的代码，需要先将另外两种驱动禁用，整个批处理的代码如下： 

echo  %date% %time%

gdalinfo.exe -checksum -nomd -norat globaldem2.jp2 --config CPL_SKIP "JP2ECW JP2OpenJPEG"

echo  %date% %time%

处理截图如图1所示：

2.3、测试JP2ECW – ERDAS JPEG2000 (.jp2)

修改上面的代码，禁用其他两种驱动，整个批处理的代码如下 

echo  %date% %time%

gdalinfo.exe -checksum -nomd -norat globaldem2.jp2 --config CPL_SKIP "JPEG2000 JP2OpenJPEG"

echo  %date% %time%

处理截图如图2所示：

2.4、测试JP2OpenJPEG — JPEG2000 driver based on OpenJPEG library

修改上面的代码，禁用其他两种驱动，整个批处理的代码如下： 

echo  %date% %time%

gdalinfo.exe -checksum -nomd -norat globaldem2.jp2 --config CPL_SKIP "JP2ECW JP2OpenJPEG"

echo  %date% %time%

处理截图如图3所示：



通过上面的测试发现，上述三个驱动均可以读取到图像的大小，空间参考等信息，前两种读取成功，第三种读取图像像素值的时候失败（今天在别的电脑测试可以读取成功，耗时非常大，本来这篇博客想比较这个库的处理速度的，结果在自己的电脑居然读取失败…………）。

还有一个就是ECW库读取的时候内存占用很少，而另外两个基本上内存有多少就占用多少，我使用的64bit的系统，8GB内存，这两个驱动处理的时候基本内存在5.5GB左右。

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