Enhanced Compressed Wavelet Formats (ECW)

Enhanced Compressed Wavelet Format (ECW)

The Enhanced Compressed Wavelet file format is a raster file format created by the ER Mapper Company.

The ECW format uses wavelet compression, which results in small, high quality image files that can be loaded and saved quickly. This format is supported by ER Viewer and the Plug in for Adobe Photoshop. LEADTOOLS uses the ECW SDK to compress and decompress ECW images. This SDK has the following two restrictions:

$image\sqrblit.gif$ The maximum sized image that can be compressed is 500MB.

$image\sqrblit.gif$ An image must be at least 128 X 128 to be compressed.

LEADTOOLS supports V2.0 of this file format.

The default extension used by this format is: ECW.

File constants associated with this file format are:

Constant	Read Support	Write Support	Description
FILE_ECW	24 BPP	24 BPP	[277] ER Mapper Enhanced Compressed Wavelet.

Required DLLs: LFECW. For a listing of the exact DLLs needed, based on the toolkit version, refer to Files To Be Included With Your Application .

This format does not support LEAD's redirected IO feature, therefore it cannot be used with LoadMemory method (ILEADRasterIO), LoadArray method (ILEADRasterIO), SaveMemory method (ILEADRasterIO), SaveArray method (ILEADRasterIO), or FeedLoad method (ILEADRasterIO).