Legacy ImageMagick Discussions Archive

I need to convert a ppm file from 24bits/pixel of color information to 8bits/pixel of color information. I tried convert but it gave me 24bits/pixel even though I asked for only 256 colors.

command: convert GB9.ppm -dither none -colors 256 GB9.txt

Is there away to convert an image (of any format) to eight bits/pixel of color information? Three bits of red, three bits of green and two bits of blue.

Thanks Much
GregQ

You are wanting a 'pallete' image and image file format for 8bit/pixel.

Either that or a realy really limited color set. such as produced by the "netscape:" built in image

Actually, I would prefer to not have a palette.

Then you may have to DIY your own 'Direct Color Indexing' file format. The "stream" command can help you with this, if you can figure out its 'map' handling.

8-bits/pixel total color in IM is -type palette, so try

convert GB9.ppm -dither none -colors 256 -type palette GB9.txt

If you save as an image rather than txt, then use gif format for output or possibly png, but not jpg

Thanks for the help. Using:

convert GB9.ppm -dither none -colors 256 -type palette GB9.txt

still produces 3bytes of color data per pixel. One byte for each color.

GregQ

I don't understand how you could get 3bits for each channel, that would be 9bits of color (RGB), which is rather strange and not something IM supports as far as I know? What do you get from

convert GB9.ppm +dither -colors 256 -depth 8 -type palette -verbose info:

I got:

Image: GB9.ppm
Format: PPM (Portable pixmap format (color))
Class: PseudoClass
Geometry: 800x600+0+0
Resolution: 72x72
Print size: 11.1111x8.33333
Units: Undefined
Type: Palette
Base type: Palette
Endianess: Undefined
Colorspace: RGB
Depth: 8-bit
Channel depth:
red: 8-bit
green: 8-bit
blue: 8-bit
Channel statistics:
Red:
min: 15 (0.0588235)
max: 252 (0.988235)
mean: 159.375 (0.625001)
standard deviation: 66.0342 (0.258957)
kurtosis: -1.07022
skewness: -0.631086
Green:
min: 7 (0.027451)
max: 245 (0.960784)
mean: 143.161 (0.561415)
standard deviation: 76.1575 (0.298657)
kurtosis: -1.39341
skewness: -0.490922
Blue:
min: 8 (0.0313725)
max: 243 (0.952941)
mean: 138.094 (0.541545)
standard deviation: 81.2504 (0.318629)
kurtosis: -1.51882
skewness: -0.3524
Image statistics:
Overall:
min: 7 (0.027451)
max: 252 (0.988235)
mean: 146.877 (0.575987)
standard deviation: 74.7487 (0.293132)
kurtosis: -1.25188
skewness: -0.527921
Histogram:
6027: ( 15, 7, 9) #0F0709 rgb(15,7,9)
2143: ( 16, 12, 21) #100C15 rgb(16,12,21)
1791: ( 20, 19, 24) #141318 rgb(20,19,24)
216: ( 25, 17, 37) #191125 rgb(25,17,37)
606: ( 26, 25, 36) #1A1924 rgb(26,25,36)
1673: ( 35, 13, 21) #230D15 rgb(35,13,21)
6156: ( 36, 12, 10) #240C0A rgb(36,12,10)
4654: ( 38, 21, 11) #26150B rgb(38,21,11)
3310: ( 38, 23, 23) #261717 rgb(38,23,23)
831: ( 46, 28, 37) #2E1C25 rgb(46,28,37)
3654: ( 52, 36, 17) #342411 rgb(52,36,17)
4108: ( 53, 36, 32) #352420 rgb(53,36,32)
3887: ( 54, 13, #360D08 rgb(54,13,8)
775: ( 55, 42, 55) #372A37 rgb(55,42,55)
2008: ( 56, 13, 22) #380D16 rgb(56,13,22)
3220: ( 57, 44, 35) #392C23 rgb(57,44,35)
795: ( 57, 53, 60) #39353C rgb(57,53,60)
6422: ( 58, 22, 11) #3A160B rgb(58,22,11)
1668: ( 58, 43, 18) #3A2B12 rgb(58,43,18)
8363: ( 61, 26, 21) #3D1A15 rgb(61,26,21)
503: ( 61, 46, 68) #3D2E44 rgb(61,46,68)
462: ( 65, 53, 78) #41354E rgb(65,53,78)
1024: ( 66, 29, 38) #421D26 rgb(66,29,38)
851: ( 66, 52, 18) #423412 rgb(66,52,18)
2695: ( 66, 52, 36) #423424 rgb(66,52,36)
1536: ( 71, 61, 83) #473D53 rgb(71,61,83)
1199: ( 74, 69, 74) #4A454A rgb(74,69,74)
1229: ( 75, 44, 55) #4B2C37 rgb(75,44,55)
2527: ( 77, 27, 12) #4D1B0C rgb(77,27,12)
4893: ( 77, 29, 21) #4D1D15 rgb(77,29,21)
6293: ( 77, 36, 20) #4D2414 rgb(77,36,20)
1658: ( 78, 56, 58) #4E383A rgb(78,56,58)
974: ( 79, 56, 19) #4F3813 rgb(79,56,19)
1461: ( 79, 70, 89) #4F4659 rgb(79,70,89)
7732: ( 80, 41, 31) #50291F rgb(80,41,31)
1269: ( 82, 75,100) #524B64 rgb(82,75,100)
768: ( 82, 83, 93) #52535D rgb(82,83,93)
2425: ( 83, 67, 52) #534334 rgb(83,67,52)
919: ( 83, 74, 52) #534A34 rgb(83,74,52)
5931: ( 86, 54, 38) #563626 rgb(86,54,38)
394: ( 86, 67, 19) #564313 rgb(86,67,19)
513: ( 87, 28, 38) #571C26 rgb(87,28,38)
580: ( 87, 85,110) #57556E rgb(87,85,110)
1138: ( 88, 70, 33) #584621 rgb(88,70,33)
135: ( 93, 75, 19) #5D4B13 rgb(93,75,19)
499: ( 93, 77,100) #5D4D64 rgb(93,77,100)
492: ( 95, 41, 52) #5F2934 rgb(95,41,52)
1111: ( 95, 49, 55) #5F3137 rgb(95,49,55)
1058: ( 95, 75, 88) #5F4B58 rgb(95,75,88)
714: ( 95, 92,112) #5F5C70 rgb(95,92,112)
1353: ( 96, 62, 77) #603E4D rgb(96,62,77)
2111: ( 98, 72, 72) #624848 rgb(98,72,72)
2354: ( 99, 59, 57) #633B39 rgb(99,59,57)
3439: (100, 44, 27) #642C1B rgb(100,44,27)
1130: (100, 86, 92) #64565C rgb(100,86,92)
3162: (101, 45, 37) #652D25 rgb(101,45,37)
3579: (101, 70, 53) #654635 rgb(101,70,53)
5612: (103, 56, 40) #673828 rgb(103,56,40)
476: (104, 55, 17) #683711 rgb(104,55,17)
776: (104, 73, 34) #684922 rgb(104,73,34)
491: (104, 84, 35) #685423 rgb(104,84,35)
1303: (105, 84, 53) #695435 rgb(105,84,53)
2098: (105, 85, 72) #695548 rgb(105,85,72)
401: (105,101,114) #696572 rgb(105,101,114)
712: (106, 99, 97) #6A6361 rgb(106,99,97)
369: (106,107,100) #6A6B64 rgb(106,107,100)
405: (107, 91, 51) #6B5B33 rgb(107,91,51)
19: (113, 82, 17) #715211 rgb(113,82,17)
31: (114, 71, 18) #724712 rgb(114,71,18)
554: (114,107,125) #726B7D rgb(114,107,125)
1873: (118, 61, 54) #763D36 rgb(118,61,54)
813: (118, 80, 84) #765054 rgb(118,80,84)
3098: (120, 68, 55) #784437 rgb(120,68,55)
1170: (121, 91, 87) #795B57 rgb(121,91,87)
324: (121, 93,109) #795D6D rgb(121,93,109)
315: (121,100, 56) #796438 rgb(121,100,56)
309: (121,106,112) #796A70 rgb(121,106,112)
492: (121,117,128) #797580 rgb(121,117,128)
418: (122, 92, 56) #7A5C38 rgb(122,92,56)
1099: (122,101, 72) #7A6548 rgb(122,101,72)
1045: (124, 83, 58) #7C533A rgb(124,83,58)
3349: (125, 76, 58) #7D4C3A rgb(125,76,58)
2680: (125, 76, 69) #7D4C45 rgb(125,76,69)
1350: (127,103, 91) #7F675B rgb(127,103,91)
534: (127,116,113) #7F7471 rgb(127,116,113)
2397: (128, 88, 71) #805847 rgb(128,88,71)
998: (130,115, 92) #82735C rgb(130,115,92)
408: (131,158,191) #839EBF rgb(131,158,191)
255: (132,123, 86) #847B56 rgb(132,123,86)
283: (133,124,140) #857C8C rgb(133,124,140)
276: (136,135,143) #88878F rgb(136,135,143)
22: (137, 84, 18) #895412 rgb(137,84,18)
163: (137,140,158) #898C9E rgb(137,140,158)
68: (138, 89, 33) #8A5921 rgb(138,89,33)
333: (138,123,128) #8A7B80 rgb(138,123,128)
29: (139, 77, 28) #8B4D1C rgb(139,77,28)
872: (139,102, 74) #8B664A rgb(139,102,74)
101: (139,104, 54) #8B6836 rgb(139,104,54)
384: (140,115, 74) #8C734A rgb(140,115,74)
72: (143,102, 34) #8F6622 rgb(143,102,34)
900: (144,101, 86) #906556 rgb(144,101,86)
78: (144,116, 54) #907436 rgb(144,116,54)
928: (144,133,128) #908580 rgb(144,133,128)
171: (145, 58, 32) #913A20 rgb(145,58,32)
532: (145,107,110) #916B6E rgb(145,107,110)
560: (145,164,188) #91A4BC rgb(145,164,188)
300: (146, 93, 86) #925D56 rgb(146,93,86)
1219: (146,108, 89) #926C59 rgb(146,108,89)
1567: (148, 89, 73) #945949 rgb(148,89,73)
204: (149,156,174) #959CAE rgb(149,156,174)
1758: (149,173,204) #95ADCC rgb(149,173,204)
242: (150, 90, 55) #965A37 rgb(150,90,55)
63: (150, 92, 12) #965C0C rgb(150,92,12)
39: (151, 66, 33) #974221 rgb(151,66,33)
1361: (151,122,111) #977A6F rgb(151,122,111)
1524: (152,116, 93) #98745D rgb(152,116,93)
564: (152,172,193) #98ACC1 rgb(152,172,193)
34: (154,107, 16) #9A6B10 rgb(154,107,16)
87: (155,100, 16) #9B6410 rgb(155,100,16)
1172: (155,140,141) #9B8C8D rgb(155,140,141)
359: (156, 72, 44) #9C482C rgb(156,72,44)
651: (157,106, 75) #9D6A4B rgb(157,106,75)
989: (158,123, 97) #9E7B61 rgb(158,123,97)
753: (158,148,145) #9E9491 rgb(158,148,145)
352: (158,153,159) #9E999F rgb(158,153,159)
43: (159,100, 49) #9F6431 rgb(159,100,49)
259: (159,124,127) #9F7C7F rgb(159,124,127)
65: (160,109, 49) #A06D31 rgb(160,109,49)
90: (160,117, 34) #A07522 rgb(160,117,34)
268: (160,119, 73) #A07749 rgb(160,119,73)
387: (160,164,168) #A0A4A8 rgb(160,164,168)
66: (162,119, 50) #A27732 rgb(162,119,50)
135: (163,107, 31) #A36B1F rgb(163,107,31)
900: (163,138,127) #A38A7F rgb(163,138,127)
88: (164,134, 82) #A48652 rgb(164,134,82)
374: (167,106, 13) #A76A0D rgb(167,106,13)
519: (167,132, 99) #A78463 rgb(167,132,99)
1793: (167,134,112) #A78670 rgb(167,134,112)
7786: (167,187,206) #A7BBCE rgb(167,187,206)
17: (168,123, 18) #A87B12 rgb(168,123,18)
273: (168,172,185) #A8ACB9 rgb(168,172,185)
100: (169,115, 17) #A97311 rgb(169,115,17)
915: (169,147,130) #A99382 rgb(169,147,130)
597: (171,147,113) #AB9371 rgb(171,147,113)
25: (172,134, 64) #AC8640 rgb(172,134,64)
2345: (172,181,194) #ACB5C2 rgb(172,181,194)
15: (173, 68, 28) #AD441C rgb(173,68,28)
1246: (173,124, 96) #AD7C60 rgb(173,124,96)
625: (173,126,109) #AD7E6D rgb(173,126,109)
358: (174,145,142) #AE918E rgb(174,145,142)
35: (175,133, 48) #AF8530 rgb(175,133,48)
150: (175,167,168) #AFA7A8 rgb(175,167,168)
83: (177,120, 31) #B1781F rgb(177,120,31)
201: (177,156,157) #B19C9D rgb(177,156,157)
559: (178,176,149) #B2B095 rgb(178,176,149)
3192: (178,187,196) #B2BBC4 rgb(178,187,196)
223: (179,175,172) #B3AFAC rgb(179,175,172)
10298: (179,195,208) #B3C3D0 rgb(179,195,208)
126: (181,120, 16) #B57810 rgb(181,120,16)
950: (182,133,100) #B68564 rgb(182,133,100)
1247: (182,141,124) #B68D7C rgb(182,141,124)
659: (182,163,149) #B6A395 rgb(182,163,149)
33: (183,121, 50) #B77932 rgb(183,121,50)
1914: (184,139,112) #B88B70 rgb(184,139,112)
105: (184,150, 98) #B89662 rgb(184,150,98)
45: (186,133, 32) #BA8520 rgb(186,133,32)
19: (188,139, 80) #BC8B50 rgb(188,139,80)
4499: (188,190,204) #BCBECC rgb(188,190,204)
4648: (188,194,196) #BCC2C4 rgb(188,194,196)
36: (189,133, 19) #BD8513 rgb(189,133,19)
1925: (189,156,141) #BD9C8D rgb(189,156,141)
64: (189,161,112) #BDA170 rgb(189,161,112)
2402: (189,189,195) #BDBDC3 rgb(189,189,195)
15: (191,146, 36) #BF9224 rgb(191,146,36)
15: (191,150, 81) #BF9651 rgb(191,150,81)
3058: (191,151,127) #BF977F rgb(191,151,127)
237: (191,177,181) #BFB1B5 rgb(191,177,181)
1510: (192,148,115) #C09473 rgb(192,148,115)
24: (194,141, 63) #C28D3F rgb(194,141,63)
40: (195,139, 47) #C38B2F rgb(195,139,47)
1942: (195,159,131) #C39F83 rgb(195,159,131)
107: (196,126,124) #C47E7C rgb(196,126,124)
6473: (196,195,196) #C4C3C4 rgb(196,195,196)
7313: (197,205,220) #C5CDDC rgb(197,205,220)
26255: (198,201,209) #C6C9D1 rgb(198,201,209)
65: (200,138, 35) #C88A23 rgb(200,138,35)
27: (200,163, 95) #C8A35F rgb(200,163,95)
32: (201,150, 64) #C99640 rgb(201,150,64)
1137: (201,170,166) #C9AAA6 rgb(201,170,166)
47: (202,149, 49) #CA9531 rgb(202,149,49)
39: (204,163, 81) #CCA351 rgb(204,163,81)
15760: (204,210,212) #CCD2D4 rgb(204,210,212)
8411: (204,211,220) #CCD3DC rgb(204,211,220)
10: (207,151, 77) #CF974D rgb(207,151,77)
509: (207,194,177) #CFC2B1 rgb(207,194,177)
4719: (208,162,131) #D0A283 rgb(208,162,131)
6335: (208,169,144) #D0A990 rgb(208,169,144)
32: (210,150, 30) #D2961E rgb(210,150,30)
32: (210,159, 60) #D29F3C rgb(210,159,60)
160: (211,163,111) #D3A36F rgb(211,163,111)
1109: (211,176,131) #D3B083 rgb(211,176,131)
15: (211,177,113) #D3B171 rgb(211,177,113)
19309: (212,210,213) #D4D2D5 rgb(212,210,213)
23: (215,168, 60) #D7A83C rgb(215,168,60)
22: (216,190,128) #D8BE80 rgb(216,190,128)
38948: (216,217,219) #D8D9DB rgb(216,217,219)
20: (218,159, 41) #DA9F29 rgb(218,159,41)
10161: (218,180,154) #DAB49A rgb(218,180,154)
3721: (219,186,165) #DBBAA5 rgb(219,186,165)
439: (219,189,180) #DBBDB4 rgb(219,189,180)
6509: (220,173,145) #DCAD91 rgb(220,173,145)
1907: (220,186,156) #DCBA9C rgb(220,186,156)
16819: (220,221,228) #DCDDE4 rgb(220,221,228)
16: (222,180, 96) #DEB460 rgb(222,180,96)
19: (225,178, 59) #E1B23B rgb(225,178,59)
19: (226,168, 44) #E2A82C rgb(226,168,44)
27: (228,180, 79) #E4B44F rgb(228,180,79)
4337: (228,189,165) #E4BDA5 rgb(228,189,165)
1239: (228,199,189) #E4C7BD rgb(228,199,189)
24021: (228,227,228) #E4E3E4 rgb(228,227,228)
25: (229,177, 44) #E5B12C rgb(229,177,44)
3836: (229,184,154) #E5B89A rgb(229,184,154)
3860: (229,230,236) #E5E6EC rgb(229,230,236)
13: (230,189,105) #E6BD69 rgb(230,189,105)
2229: (231,195,164) #E7C3A4 rgb(231,195,164)
70: (231,199,143) #E7C78F rgb(231,199,143)
13: (233,190, 89) #E9BE59 rgb(233,190,89)
21: (233,192,125) #E9C07D rgb(233,192,125)
3433: (233,198,174) #E9C6AE rgb(233,198,174)
13: (235,196,107) #EBC46B rgb(235,196,107)
5222: (236,235,236) #ECEBEC rgb(236,235,236)
21: (238,208,143) #EED08F rgb(238,208,143)
14: (239,196, 71) #EFC447 rgb(239,196,71)
1358: (240,207,179) #F0CFB3 rgb(240,207,179)
62: (240,211,158) #F0D39E rgb(240,211,158)
18: (241,204, 90) #F1CC5A rgb(241,204,90)
10: (241,205,127) #F1CD7F rgb(241,205,127)
911: (241,210,189) #F1D2BD rgb(241,210,189)
1464: (242,220,209) #F2DCD1 rgb(242,220,209)
1183: (242,241,226) #F2F1E2 rgb(242,241,226)
13: (243,203, 74) #F3CB4A rgb(243,203,74)
31: (244,188, 67) #F4BC43 rgb(244,188,67)
7: (244,230,176) #F4E6B0 rgb(244,230,176)
38: (245,206,110) #F5CE6E rgb(245,206,110)
50: (246,218,121) #F6DA79 rgb(246,218,121)
1287: (246,245,243) #F6F5F3 rgb(246,245,243)
915: (247,230,209) #F7E6D1 rgb(247,230,209)
367: (248,219,194) #F8DBC2 rgb(248,219,194)
18: (248,221,157) #F8DD9D rgb(248,221,157)
32: (248,224,174) #F8E0AE rgb(248,224,174)
28: (249,223,144) #F9DF90 rgb(249,223,144)
21: (250,220,104) #FADC68 rgb(250,220,104)
59: (252,228,126) #FCE47E rgb(252,228,126)
44: (252,231,147) #FCE793 rgb(252,231,147)
5: (252,234,191) #FCEABF rgb(252,234,191)
21: (252,238,208) #FCEED0 rgb(252,238,208)
Colormap: 256
0: ( 15, 7, 9) #0F0709 rgb(15,7,9)
1: ( 16, 12, 21) #100C15 rgb(16,12,21)
2: ( 20, 19, 24) #141318 rgb(20,19,24)
3: ( 36, 12, 10) #240C0A rgb(36,12,10)
4: ( 54, 13, #360D08 rgb(54,13,8)
5: ( 38, 21, 11) #26150B rgb(38,21,11)
6: ( 58, 22, 11) #3A160B rgb(58,22,11)
7: ( 35, 13, 21) #230D15 rgb(35,13,21)
8: ( 56, 13, 22) #380D16 rgb(56,13,22)
9: ( 38, 23, 23) #261717 rgb(38,23,23)
10: ( 61, 26, 21) #3D1A15 rgb(61,26,21)
11: ( 52, 36, 17) #342411 rgb(52,36,17)
12: ( 58, 43, 18) #3A2B12 rgb(58,43,18)
13: ( 25, 17, 37) #191125 rgb(25,17,37)
14: ( 26, 25, 36) #1A1924 rgb(26,25,36)
15: ( 46, 28, 37) #2E1C25 rgb(46,28,37)
16: ( 53, 36, 32) #352420 rgb(53,36,32)
17: ( 57, 44, 35) #392C23 rgb(57,44,35)
18: ( 55, 42, 55) #372A37 rgb(55,42,55)
19: ( 57, 53, 60) #39353C rgb(57,53,60)
20: ( 77, 27, 12) #4D1B0C rgb(77,27,12)
21: ( 77, 29, 21) #4D1D15 rgb(77,29,21)
22: ( 77, 36, 20) #4D2414 rgb(77,36,20)
23: ( 80, 41, 31) #50291F rgb(80,41,31)
24: ( 66, 52, 18) #423412 rgb(66,52,18)
25: ( 79, 56, 19) #4F3813 rgb(79,56,19)
26: (100, 44, 27) #642C1B rgb(100,44,27)
27: (104, 55, 17) #683711 rgb(104,55,17)
28: ( 66, 29, 38) #421D26 rgb(66,29,38)
29: ( 87, 28, 38) #571C26 rgb(87,28,38)
30: ( 66, 52, 36) #423424 rgb(66,52,36)
31: ( 86, 54, 38) #563626 rgb(86,54,38)
32: ( 75, 44, 55) #4B2C37 rgb(75,44,55)
33: ( 95, 41, 52) #5F2934 rgb(95,41,52)
34: ( 78, 56, 58) #4E383A rgb(78,56,58)
35: ( 95, 49, 55) #5F3137 rgb(95,49,55)
36: (101, 45, 37) #652D25 rgb(101,45,37)
37: (103, 56, 40) #673828 rgb(103,56,40)
38: ( 99, 59, 57) #633B39 rgb(99,59,57)
39: (118, 61, 54) #763D36 rgb(118,61,54)
40: ( 86, 67, 19) #564313 rgb(86,67,19)
41: ( 93, 75, 19) #5D4B13 rgb(93,75,19)
42: (114, 71, 18) #724712 rgb(114,71,18)
43: (113, 82, 17) #715211 rgb(113,82,17)
44: ( 88, 70, 33) #584621 rgb(88,70,33)
45: ( 83, 67, 52) #534334 rgb(83,67,52)
46: ( 83, 74, 52) #534A34 rgb(83,74,52)
47: (104, 73, 34) #684922 rgb(104,73,34)
48: (104, 84, 35) #685423 rgb(104,84,35)
49: (101, 70, 53) #654635 rgb(101,70,53)
50: (120, 68, 55) #784437 rgb(120,68,55)
51: (125, 76, 58) #7D4C3A rgb(125,76,58)
52: (105, 84, 53) #695435 rgb(105,84,53)
53: (107, 91, 51) #6B5B33 rgb(107,91,51)
54: (124, 83, 58) #7C533A rgb(124,83,58)
55: (122, 92, 56) #7A5C38 rgb(122,92,56)
56: (121,100, 56) #796438 rgb(121,100,56)
57: ( 61, 46, 68) #3D2E44 rgb(61,46,68)
58: ( 65, 53, 78) #41354E rgb(65,53,78)
59: ( 71, 61, 83) #473D53 rgb(71,61,83)
60: ( 96, 62, 77) #603E4D rgb(96,62,77)
61: ( 74, 69, 74) #4A454A rgb(74,69,74)
62: ( 79, 70, 89) #4F4659 rgb(79,70,89)
63: ( 95, 75, 88) #5F4B58 rgb(95,75,88)
64: ( 82, 83, 93) #52535D rgb(82,83,93)
65: ( 98, 72, 72) #624848 rgb(98,72,72)
66: (125, 76, 69) #7D4C45 rgb(125,76,69)
67: (105, 85, 72) #695548 rgb(105,85,72)
68: (100, 86, 92) #64565C rgb(100,86,92)
69: (118, 80, 84) #765054 rgb(118,80,84)
70: (121, 91, 87) #795B57 rgb(121,91,87)
71: (122,101, 72) #7A6548 rgb(122,101,72)
72: (127,103, 91) #7F675B rgb(127,103,91)
73: ( 82, 75,100) #524B64 rgb(82,75,100)
74: ( 93, 77,100) #5D4D64 rgb(93,77,100)
75: ( 87, 85,110) #57556E rgb(87,85,110)
76: ( 95, 92,112) #5F5C70 rgb(95,92,112)
77: (121, 93,109) #795D6D rgb(121,93,109)
78: (106, 99, 97) #6A6361 rgb(106,99,97)
79: (106,107,100) #6A6B64 rgb(106,107,100)
80: (105,101,114) #696572 rgb(105,101,114)
81: (121,106,112) #796A70 rgb(121,106,112)
82: (114,107,125) #726B7D rgb(114,107,125)
83: (127,116,113) #7F7471 rgb(127,116,113)
84: (145, 58, 32) #913A20 rgb(145,58,32)
85: (150, 92, 12) #965C0C rgb(150,92,12)
86: (139, 77, 28) #8B4D1C rgb(139,77,28)
87: (137, 84, 18) #895412 rgb(137,84,18)
88: (173, 68, 28) #AD441C rgb(173,68,28)
89: (155,100, 16) #9B6410 rgb(155,100,16)
90: (154,107, 16) #9A6B10 rgb(154,107,16)
91: (167,106, 13) #A76A0D rgb(167,106,13)
92: (163,107, 31) #A36B1F rgb(163,107,31)
93: (169,115, 17) #A97311 rgb(169,115,17)
94: (168,123, 18) #A87B12 rgb(168,123,18)
95: (181,120, 16) #B57810 rgb(181,120,16)
96: (177,120, 31) #B1781F rgb(177,120,31)
97: (151, 66, 33) #974221 rgb(151,66,33)
98: (156, 72, 44) #9C482C rgb(156,72,44)
99: (138, 89, 33) #8A5921 rgb(138,89,33)
100: (150, 90, 55) #965A37 rgb(150,90,55)
101: (143,102, 34) #8F6622 rgb(143,102,34)
102: (139,104, 54) #8B6836 rgb(139,104,54)
103: (159,100, 49) #9F6431 rgb(159,100,49)
104: (144,116, 54) #907436 rgb(144,116,54)
105: (160,117, 34) #A07522 rgb(160,117,34)
106: (160,109, 49) #A06D31 rgb(160,109,49)
107: (162,119, 50) #A27732 rgb(162,119,50)
108: (183,121, 50) #B77932 rgb(183,121,50)
109: (128, 88, 71) #805847 rgb(128,88,71)
110: (148, 89, 73) #945949 rgb(148,89,73)
111: (146, 93, 86) #925D56 rgb(146,93,86)
112: (139,102, 74) #8B664A rgb(139,102,74)
113: (157,106, 75) #9D6A4B rgb(157,106,75)
114: (140,115, 74) #8C734A rgb(140,115,74)
115: (144,101, 86) #906556 rgb(144,101,86)
116: (146,108, 89) #926C59 rgb(146,108,89)
117: (132,123, 86) #847B56 rgb(132,123,86)
118: (130,115, 92) #82735C rgb(130,115,92)
119: (152,116, 93) #98745D rgb(152,116,93)
120: (160,119, 73) #A07749 rgb(160,119,73)
121: (145,107,110) #916B6E rgb(145,107,110)
122: (158,123, 97) #9E7B61 rgb(158,123,97)
123: (151,122,111) #977A6F rgb(151,122,111)
124: (159,124,127) #9F7C7F rgb(159,124,127)
125: (173,124, 96) #AD7C60 rgb(173,124,96)
126: (173,126,109) #AD7E6D rgb(173,126,109)
127: (196,126,124) #C47E7C rgb(196,126,124)
128: (189,133, 19) #BD8513 rgb(189,133,19)
129: (186,133, 32) #BA8520 rgb(186,133,32)
130: (191,146, 36) #BF9224 rgb(191,146,36)
131: (175,133, 48) #AF8530 rgb(175,133,48)
132: (210,150, 30) #D2961E rgb(210,150,30)
133: (200,138, 35) #C88A23 rgb(200,138,35)
134: (195,139, 47) #C38B2F rgb(195,139,47)
135: (218,159, 41) #DA9F29 rgb(218,159,41)
136: (194,141, 63) #C28D3F rgb(194,141,63)
137: (202,149, 49) #CA9531 rgb(202,149,49)
138: (210,159, 60) #D29F3C rgb(210,159,60)
139: (215,168, 60) #D7A83C rgb(215,168,60)
140: (226,168, 44) #E2A82C rgb(226,168,44)
141: (229,177, 44) #E5B12C rgb(229,177,44)
142: (225,178, 59) #E1B23B rgb(225,178,59)
143: (172,134, 64) #AC8640 rgb(172,134,64)
144: (164,134, 82) #A48652 rgb(164,134,82)
145: (188,139, 80) #BC8B50 rgb(188,139,80)
146: (191,150, 81) #BF9651 rgb(191,150,81)
147: (167,132, 99) #A78463 rgb(167,132,99)
148: (182,133,100) #B68564 rgb(182,133,100)
149: (184,150, 98) #B89662 rgb(184,150,98)
150: (167,134,112) #A78670 rgb(167,134,112)
151: (163,138,127) #A38A7F rgb(163,138,127)
152: (184,139,112) #B88B70 rgb(184,139,112)
153: (182,141,124) #B68D7C rgb(182,141,124)
154: (171,147,113) #AB9371 rgb(171,147,113)
155: (191,151,127) #BF977F rgb(191,151,127)
156: (189,161,112) #BDA170 rgb(189,161,112)
157: (201,150, 64) #C99640 rgb(201,150,64)
158: (207,151, 77) #CF974D rgb(207,151,77)
159: (204,163, 81) #CCA351 rgb(204,163,81)
160: (200,163, 95) #C8A35F rgb(200,163,95)
161: (228,180, 79) #E4B44F rgb(228,180,79)
162: (244,188, 67) #F4BC43 rgb(244,188,67)
163: (233,190, 89) #E9BE59 rgb(233,190,89)
164: (192,148,115) #C09473 rgb(192,148,115)
165: (211,163,111) #D3A36F rgb(211,163,111)
166: (222,180, 96) #DEB460 rgb(222,180,96)
167: (211,177,113) #D3B171 rgb(211,177,113)
168: (230,189,105) #E6BD69 rgb(230,189,105)
169: (239,196, 71) #EFC447 rgb(239,196,71)
170: (243,203, 74) #F3CB4A rgb(243,203,74)
171: (241,204, 90) #F1CC5A rgb(241,204,90)
172: (235,196,107) #EBC46B rgb(235,196,107)
173: (245,206,110) #F5CE6E rgb(245,206,110)
174: (250,220,104) #FADC68 rgb(250,220,104)
175: (233,192,125) #E9C07D rgb(233,192,125)
176: (241,205,127) #F1CD7F rgb(241,205,127)
177: (246,218,121) #F6DA79 rgb(246,218,121)
178: (252,228,126) #FCE47E rgb(252,228,126)
179: (121,117,128) #797580 rgb(121,117,128)
180: (138,123,128) #8A7B80 rgb(138,123,128)
181: (133,124,140) #857C8C rgb(133,124,140)
182: (136,135,143) #88878F rgb(136,135,143)
183: (144,133,128) #908580 rgb(144,133,128)
184: (155,140,141) #9B8C8D rgb(155,140,141)
185: (137,140,158) #898C9E rgb(137,140,158)
186: (158,148,145) #9E9491 rgb(158,148,145)
187: (158,153,159) #9E999F rgb(158,153,159)
188: (169,147,130) #A99382 rgb(169,147,130)
189: (174,145,142) #AE918E rgb(174,145,142)
190: (189,156,141) #BD9C8D rgb(189,156,141)
191: (177,156,157) #B19C9D rgb(177,156,157)
192: (182,163,149) #B6A395 rgb(182,163,149)
193: (178,176,149) #B2B095 rgb(178,176,149)
194: (149,156,174) #959CAE rgb(149,156,174)
195: (131,158,191) #839EBF rgb(131,158,191)
196: (145,164,188) #91A4BC rgb(145,164,188)
197: (160,164,168) #A0A4A8 rgb(160,164,168)
198: (175,167,168) #AFA7A8 rgb(175,167,168)
199: (179,175,172) #B3AFAC rgb(179,175,172)
200: (168,172,185) #A8ACB9 rgb(168,172,185)
201: (191,177,181) #BFB1B5 rgb(191,177,181)
202: (195,159,131) #C39F83 rgb(195,159,131)
203: (208,162,131) #D0A283 rgb(208,162,131)
204: (211,176,131) #D3B083 rgb(211,176,131)
205: (216,190,128) #D8BE80 rgb(216,190,128)
206: (208,169,144) #D0A990 rgb(208,169,144)
207: (220,173,145) #DCAD91 rgb(220,173,145)
208: (218,180,154) #DAB49A rgb(218,180,154)
209: (220,186,156) #DCBA9C rgb(220,186,156)
210: (229,184,154) #E5B89A rgb(229,184,154)
211: (201,170,166) #C9AAA6 rgb(201,170,166)
212: (219,186,165) #DBBAA5 rgb(219,186,165)
213: (219,189,180) #DBBDB4 rgb(219,189,180)
214: (228,189,165) #E4BDA5 rgb(228,189,165)
215: (231,199,143) #E7C78F rgb(231,199,143)
216: (238,208,143) #EED08F rgb(238,208,143)
217: (249,223,144) #F9DF90 rgb(249,223,144)
218: (240,211,158) #F0D39E rgb(240,211,158)
219: (248,221,157) #F8DD9D rgb(248,221,157)
220: (252,231,147) #FCE793 rgb(252,231,147)
221: (207,194,177) #CFC2B1 rgb(207,194,177)
222: (231,195,164) #E7C3A4 rgb(231,195,164)
223: (233,198,174) #E9C6AE rgb(233,198,174)
224: (228,199,189) #E4C7BD rgb(228,199,189)
225: (240,207,179) #F0CFB3 rgb(240,207,179)
226: (241,210,189) #F1D2BD rgb(241,210,189)
227: (248,224,174) #F8E0AE rgb(248,224,174)
228: (244,230,176) #F4E6B0 rgb(244,230,176)
229: (252,234,191) #FCEABF rgb(252,234,191)
230: (152,172,193) #98ACC1 rgb(152,172,193)
231: (149,173,204) #95ADCC rgb(149,173,204)
232: (172,181,194) #ACB5C2 rgb(172,181,194)
233: (167,187,206) #A7BBCE rgb(167,187,206)
234: (178,187,196) #B2BBC4 rgb(178,187,196)
235: (189,189,195) #BDBDC3 rgb(189,189,195)
236: (188,190,204) #BCBECC rgb(188,190,204)
237: (188,194,196) #BCC2C4 rgb(188,194,196)
238: (179,195,208) #B3C3D0 rgb(179,195,208)
239: (196,195,196) #C4C3C4 rgb(196,195,196)
240: (198,201,209) #C6C9D1 rgb(198,201,209)
241: (197,205,220) #C5CDDC rgb(197,205,220)
242: (204,210,212) #CCD2D4 rgb(204,210,212)
243: (204,211,220) #CCD3DC rgb(204,211,220)
244: (212,210,213) #D4D2D5 rgb(212,210,213)
245: (216,217,219) #D8D9DB rgb(216,217,219)
246: (248,219,194) #F8DBC2 rgb(248,219,194)
247: (242,220,209) #F2DCD1 rgb(242,220,209)
248: (247,230,209) #F7E6D1 rgb(247,230,209)
249: (252,238,208) #FCEED0 rgb(252,238,208)
250: (220,221,228) #DCDDE4 rgb(220,221,228)
251: (228,227,228) #E4E3E4 rgb(228,227,228)
252: (229,230,236) #E5E6EC rgb(229,230,236)
253: (236,235,236) #ECEBEC rgb(236,235,236)
254: (242,241,226) #F2F1E2 rgb(242,241,226)
255: (246,245,243) #F6F5F3 rgb(246,245,243)
Rendering intent: Undefined
Interlace: None
Background color: white
Border color: rgb(223,223,223)
Matte color: grey74
Transparent color: black
Compose: Over
Page geometry: 800x600+0+0
Dispose: Undefined
Iterations: 0
Compression: Undefined
Orientation: Undefined
Properties:
comment: Created by IrfanView

date:create: 2010-11-17T12:46:32-08:00
date:modify: 2010-11-16T17:15:41-08:00
signature: 80e49119c14d75cc7a653e9c6b2a1184ceae41bbe2160ef503d282d92788846e
Artifacts:
dither: none
type: palette
verbose: true
Tainted: True
Filesize: 5.342MBB
Number pixels: 480KB
Pixels per second: 443KB
User time: 1.030u
Elapsed time: 0:02.083
Version: ImageMagick 6.6.5-8 2010-11-10 Q16 http://www.imagemagick.org

You are getting exactly an 8-bit total per channel palette image with 256 colors. I believe IM translates the palette into the colors for each channel as 8-bits so it can tell you the equivalent min, max etc stats.

Base type: Palette
Colorspace: RGB
Depth: 8-bit


So perhaps you want something else. If so please clarify.