dicom_encode_jpeg2000_lossless.m
4b5355e68791master

dicom_encode_jpeg2000_lossless.m
View Options

			function [fragments, frames] = dicom_encode_jpeg2000_lossless(X, bits)
			%DICOM_ENCODE_JPEG2000_LOSSLESS Encode pixel cells using lossless JPEG.
			% [FRAGMENTS, LIST] = DICOM_ENCODE_JPEG2000_LOSSLESS(X) compresses and
			% encodes the image X using lossless JPEG compression. FRAGMENTS is
			% a cell array containing the encoded frames (as UINT 8data) from the
			% compressor. LIST is a vector of indices to the first fragment of
			% each compressed frame of a multiframe image.
			%
			% See also DICOM_ENCODE_RLE, DICOM_ENCODE_JPEG2000_LOSSY.

			% Copyright 2010 The MathWorks, Inc.


			% Use IMWRITE to create a JPEG image.

			numFrames = size(X,4);
			fragments = cell(numFrames, 1);
			frames = 1:numFrames;

			for p = 1:numFrames

			tempfile = tempname;
			imwrite(X(:,:,:,p), tempfile, 'j2c', 'mode', 'lossless');

			% Read the image from the temporary file.
			fid = fopen(tempfile, 'r');
			fragments{p} = fread(fid, inf, 'uint8=>uint8');
			fclose(fid);

			% Remove the temporary file.
			try
			delete(tempfile)
			catch
			warning(message('images:dicom_encode_jpeg2000_lossless:tempFileDelete', tempfile));
			end

			end