1 List of parameters for the coder JPEG 2000 :
3 Date : June the 25th, 2003
4 Author : Yannick Verschueren
5 Contact : verschueren@tele.ucl.ac.be
7 - the option -help displays the readme.txt file on screen
9 - The markers COD and QCD are writed both of two in the main_header and never appear in the tile_header. The markers in the main header are : SOC SIZ COD QCD COM.
11 - This coder can encode mega image, a test was made on a 24000x24000 pixels color image. You need enough disk space memory (twice the original) to encode the image. (i.e. for a 1.5 Gb image you need a minimum of 3Gb of disk memory)
16 * the value of rate enter in the code line is the compression factor !
19 -r 20,10,1 means quality 1 : compress 20x, quality 2 : compress 10x and quality 3 : compress 1x = lossless
21 * The number of resolution can be modified by the program in view to respect profile-0 conditions (Taubman, Marcelin (2002), "JPEG2000, image compression fundamentals, standards and practice", p700)
28 * size of precinct 2^15 x 2^15 (means 1 precinct)
29 * size of code-block 64 x 64
30 * Number of resolution : 6
31 * No SOP marker in the codestream
32 * No EPH marker in the codestream
33 * No sub-sampling in x and y direction
34 * No mode switch activated
35 * progression order : LRCP
38 * No offset of the origin of the image
39 * No offset of the origin of the tiles
45 -i : source file (-i source.pnm also *.pgm, *.ppm) "required"
47 -o : destination file (-o dest.j2k) "required"
49 -r : different rates (-r 20,10,5) "optional"
51 -n : Number of resolution (-n 3) "optional"
53 -b : size of code block (-b 32,32) "optional"
55 -c : size of precinct (-c 128,128) "optional"
57 -t : size of tile (-t 512,512) "optional"
59 -p : progression order (-p LRCP) [LRCP, RLCP, RPCL, PCRL, CPRL] "optional"
61 -s : subsampling factor (-s 2,2) [-s X,Y] "optional"
63 -SOP : write SOP marker before each packet "optional"
65 -EPH : write EPH marker after each header packet "optional"
67 -M : mode switch (-M 3) [1= BYPASS(LAZY) 2=RESET 4=RESTART(TERMALL) 8=VSC 16=ERTERM(SEGTERM) 32=SEGMARK(SEGSYM)] "optional"
68 for several mode switch you have to add the value of each mode you want
69 ex : RESTART(4) + RESET(2) + SEGMARK(32) = -M 38
71 -x : Create an index file *.Idx (-x index_name.Idx) "optional"
73 -ROI:c=%d,U=%d : quantization indices upshifted for component c=%d [%d = 0,1,2]
74 with a value of U=%d [0 <= %d <= 37] (i.e. -ROI:c=0,U=25) "optional"
76 -d : offset of the origin of the image (-d 150,300) "optional"
78 -T : offset of the origin of the tiles (-T 100,75) "optional"
80 -I : Use the irreversible DWT 9-7 (-I) "optional"
85 * subsampling bigger than 2 can produce error
87 The index file respect the structure below :
88 ---------------------------------------------
90 Image_height Image_width
92 Tiles_size_X Tiles_size_Y
96 Precincts_size_X Precincts_size_Y
97 Main_header_end_position
99 Tile0 start_pos end_Theader end_pos
103 Tpacket_0 Tile layer res. comp. prec. start_pos end_pos
105 Tpacket_M " " " " " " "