Vuescan tif can't be read

J

John

I have a vuescan generated 16-bit grayscale tif file that
I'm trying to process with ImageMagick utilities. When
I try to use the 'convert' utility it returns an error:
Invalid colormap index

Photoshop can read it ok. Is there something with
ImageMagick or Vuescan?

Attached is some program output.

TIA.


D:\scan>identify scan1a.tif
scan1a.tif TIFF 800x305+0+0 PseudoClass 256c 16-bit 476.9kb 0.020u 0:01

D:\scan>convert -resize 400x150 scan1a.tif scan1b.tif
convert: Invalid colormap index (scan1a.tif).

D:\scan>identify -verbose scan1a.tif
TIFF Directory at offset 0x77248
Image Width: 800 Image Length: 305
Resolution: 400, 400 pixels/inch
Bits/Sample: 16
Compression Scheme: None
Photometric Interpretation: min-is-black
FillOrder: msb-to-lsb
Orientation: row 0 top, col 0 lhs
Samples/Pixel: 1
Rows/Strip: 20
Min Sample Value: 0
Max Sample Value: 65535
Planar Configuration: single image plane
Image: scan1a.tif
Format: TIFF (Tagged Image File Format)
Geometry: 800x305
Class: PseudoClass
Type: grayscale
Depth: 8 bits-per-pixel component
Colors: 256
0: ( 0, 0, 0) black
1: ( 257, 257, 257) #010101010101
2: ( 514, 514, 514) #020202020202
3: ( 771, 771, 771) grey1
4: ( 1028, 1028, 1028) #040404040404
5: ( 1285, 1285, 1285) grey2
6: ( 1542, 1542, 1542) #060606060606
7: ( 1799, 1799, 1799) #070707070707
8: ( 2056, 2056, 2056) grey3
9: ( 2313, 2313, 2313) #090909090909
10: ( 2570, 2570, 2570) grey4
11: ( 2827, 2827, 2827) #0B0B0B0B0B0B
12: ( 3084, 3084, 3084) #0C0C0C0C0C0C
13: ( 3341, 3341, 3341) grey5
14: ( 3598, 3598, 3598) #0E0E0E0E0E0E
15: ( 3855, 3855, 3855) grey6
16: ( 4112, 4112, 4112) #101010101010
17: ( 4369, 4369, 4369) #111111111111
18: ( 4626, 4626, 4626) grey7
19: ( 4883, 4883, 4883) #131313131313
20: ( 5140, 5140, 5140) grey8
21: ( 5397, 5397, 5397) #151515151515
22: ( 5654, 5654, 5654) #161616161616
23: ( 5911, 5911, 5911) grey9
24: ( 6168, 6168, 6168) #181818181818
25: ( 6425, 6425, 6425) #191919191919
26: ( 6682, 6682, 6682) grey10
27: ( 6939, 6939, 6939) #1B1B1B1B1B1B
28: ( 7196, 7196, 7196) grey11
29: ( 7453, 7453, 7453) #1D1D1D1D1D1D
30: ( 7710, 7710, 7710) #1E1E1E1E1E1E
31: ( 7967, 7967, 7967) grey12
32: ( 8224, 8224, 8224) #202020202020
33: ( 8481, 8481, 8481) grey13
34: ( 8738, 8738, 8738) #222222222222
35: ( 8995, 8995, 8995) #232323232323
36: ( 9252, 9252, 9252) grey14
37: ( 9509, 9509, 9509) #252525252525
38: ( 9766, 9766, 9766) grey15
39: (10023,10023,10023) #272727272727
40: (10280,10280,10280) #282828282828
41: (10537,10537,10537) grey16
42: (10794,10794,10794) #2A2A2A2A2A2A
43: (11051,11051,11051) grey17
44: (11308,11308,11308) #2C2C2C2C2C2C
45: (11565,11565,11565) #2D2D2D2D2D2D
46: (11822,11822,11822) grey18
47: (12079,12079,12079) #2F2F2F2F2F2F
48: (12336,12336,12336) grey19
49: (12593,12593,12593) #313131313131
50: (12850,12850,12850) #323232323232
51: (13107,13107,13107) grey20
52: (13364,13364,13364) #343434343434
53: (13621,13621,13621) #353535353535
54: (13878,13878,13878) grey21
55: (14135,14135,14135) #373737373737
56: (14392,14392,14392) grey22
57: (14649,14649,14649) #393939393939
58: (14906,14906,14906) #3A3A3A3A3A3A
59: (15163,15163,15163) grey23
60: (15420,15420,15420) #3C3C3C3C3C3C
61: (15677,15677,15677) grey24
62: (15934,15934,15934) #3E3E3E3E3E3E
63: (16191,16191,16191) #3F3F3F3F3F3F
64: (16448,16448,16448) grey25
65: (16705,16705,16705) #414141414141
66: (16962,16962,16962) grey26
67: (17219,17219,17219) #434343434343
68: (17476,17476,17476) #444444444444
69: (17733,17733,17733) grey27
70: (17990,17990,17990) #464646464646
71: (18247,18247,18247) grey28
72: (18504,18504,18504) #484848484848
73: (18761,18761,18761) #494949494949
74: (19018,19018,19018) grey29
75: (19275,19275,19275) #4B4B4B4B4B4B
76: (19532,19532,19532) #4C4C4C4C4C4C
77: (19789,19789,19789) grey30
78: (20046,20046,20046) #4E4E4E4E4E4E
79: (20303,20303,20303) grey31
80: (20560,20560,20560) #505050505050
81: (20817,20817,20817) #515151515151
82: (21074,21074,21074) grey32
83: (21331,21331,21331) #535353535353
84: (21588,21588,21588) grey33
85: (21845,21845,21845) #555555555555
86: (22102,22102,22102) #565656565656
87: (22359,22359,22359) grey34
88: (22616,22616,22616) #585858585858
89: (22873,22873,22873) grey35
90: (23130,23130,23130) #5A5A5A5A5A5A
91: (23387,23387,23387) #5B5B5B5B5B5B
92: (23644,23644,23644) grey36
93: (23901,23901,23901) #5D5D5D5D5D5D
94: (24158,24158,24158) grey37
95: (24415,24415,24415) #5F5F5F5F5F5F
96: (24672,24672,24672) #606060606060
97: (24929,24929,24929) grey38
98: (25186,25186,25186) #626262626262
99: (25443,25443,25443) grey39
100: (25700,25700,25700) #646464646464
101: (25957,25957,25957) #656565656565
102: (26214,26214,26214) grey40
103: (26471,26471,26471) #676767676767
104: (26728,26728,26728) #686868686868
105: (26985,26985,26985) DimGray
106: (27242,27242,27242) #6A6A6A6A6A6A
107: (27499,27499,27499) grey42
108: (27756,27756,27756) #6C6C6C6C6C6C
109: (28013,28013,28013) #6D6D6D6D6D6D
110: (28270,28270,28270) grey43
111: (28527,28527,28527) #6F6F6F6F6F6F
112: (28784,28784,28784) grey44
113: (29041,29041,29041) #717171717171
114: (29298,29298,29298) #727272727272
115: (29555,29555,29555) grey45
116: (29812,29812,29812) #747474747474
117: (30069,30069,30069) grey46
118: (30326,30326,30326) #767676767676
119: (30583,30583,30583) #777777777777
120: (30840,30840,30840) grey47
121: (31097,31097,31097) #797979797979
122: (31354,31354,31354) grey48
123: (31611,31611,31611) #7B7B7B7B7B7B
124: (31868,31868,31868) #7C7C7C7C7C7C
125: (32125,32125,32125) grey49
126: (32382,32382,32382) gray
127: (32639,32639,32639) grey50
128: (32896,32896,32896) fractal
129: (33153,33153,33153) #818181818181
130: (33410,33410,33410) grey51
131: (33667,33667,33667) #838383838383
132: (33924,33924,33924) #848484848484
133: (34181,34181,34181) grey52
134: (34438,34438,34438) #868686868686
135: (34695,34695,34695) grey53
136: (34952,34952,34952) #888888888888
137: (35209,35209,35209) #898989898989
138: (35466,35466,35466) grey54
139: (35723,35723,35723) #8B8B8B8B8B8B
140: (35980,35980,35980) grey55
141: (36237,36237,36237) #8D8D8D8D8D8D
142: (36494,36494,36494) #8E8E8E8E8E8E
143: (36751,36751,36751) grey56
144: (37008,37008,37008) #909090909090
145: (37265,37265,37265) grey57
146: (37522,37522,37522) #929292929292
147: (37779,37779,37779) #939393939393
148: (38036,38036,38036) grey58
149: (38293,38293,38293) #959595959595
150: (38550,38550,38550) grey59
151: (38807,38807,38807) #979797979797
152: (39064,39064,39064) #989898989898
153: (39321,39321,39321) grey60
154: (39578,39578,39578) #9A9A9A9A9A9A
155: (39835,39835,39835) #9B9B9B9B9B9B
156: (40092,40092,40092) grey61
157: (40349,40349,40349) #9D9D9D9D9D9D
158: (40606,40606,40606) grey62
159: (40863,40863,40863) #9F9F9F9F9F9F
160: (41120,41120,41120) #A0A0A0A0A0A0
161: (41377,41377,41377) grey63
162: (41634,41634,41634) #A2A2A2A2A2A2
163: (41891,41891,41891) grey64
164: (42148,42148,42148) #A4A4A4A4A4A4
165: (42405,42405,42405) #A5A5A5A5A5A5
166: (42662,42662,42662) grey65
167: (42919,42919,42919) #A7A7A7A7A7A7
168: (43176,43176,43176) grey66
169: (43433,43433,43433) DarkGray
170: (43690,43690,43690) #AAAAAAAAAAAA
171: (43947,43947,43947) grey67
172: (44204,44204,44204) #ACACACACACAC
173: (44461,44461,44461) grey68
174: (44718,44718,44718) #AEAEAEAEAEAE
175: (44975,44975,44975) #AFAFAFAFAFAF
176: (45232,45232,45232) grey69
177: (45489,45489,45489) #B1B1B1B1B1B1
178: (45746,45746,45746) #B2B2B2B2B2B2
179: (46003,46003,46003) grey70
180: (46260,46260,46260) #B4B4B4B4B4B4
181: (46517,46517,46517) grey71
182: (46774,46774,46774) #B6B6B6B6B6B6
183: (47031,47031,47031) #B7B7B7B7B7B7
184: (47288,47288,47288) grey72
185: (47545,47545,47545) #B9B9B9B9B9B9
186: (47802,47802,47802) grey73
187: (48059,48059,48059) #BBBBBBBBBBBB
188: (48316,48316,48316) #BCBCBCBCBCBC
189: (48573,48573,48573) grey74
190: (48830,48830,48830) grey
191: (49087,49087,49087) grey75
192: (49344,49344,49344) silver
193: (49601,49601,49601) #C1C1C1C1C1C1
194: (49858,49858,49858) grey76
195: (50115,50115,50115) #C3C3C3C3C3C3
196: (50372,50372,50372) grey77
197: (50629,50629,50629) #C5C5C5C5C5C5
198: (50886,50886,50886) #C6C6C6C6C6C6
199: (51143,51143,51143) grey78
200: (51400,51400,51400) #C8C8C8C8C8C8
201: (51657,51657,51657) grey79
202: (51914,51914,51914) #CACACACACACA
203: (52171,52171,52171) #CBCBCBCBCBCB
204: (52428,52428,52428) grey80
205: (52685,52685,52685) #CDCDCDCDCDCD
206: (52942,52942,52942) #CECECECECECE
207: (53199,53199,53199) grey81
208: (53456,53456,53456) #D0D0D0D0D0D0
209: (53713,53713,53713) grey82
210: (53970,53970,53970) #D2D2D2D2D2D2
211: (54227,54227,54227) LightGray
212: (54484,54484,54484) grey83
213: (54741,54741,54741) #D5D5D5D5D5D5
214: (54998,54998,54998) grey84
215: (55255,55255,55255) #D7D7D7D7D7D7
216: (55512,55512,55512) #D8D8D8D8D8D8
217: (55769,55769,55769) grey85
218: (56026,56026,56026) #DADADADADADA
219: (56283,56283,56283) grey86
220: (56540,56540,56540) gainsboro
221: (56797,56797,56797) #DDDDDDDDDDDD
222: (57054,57054,57054) grey87
223: (57311,57311,57311) #DFDFDFDFDFDF
224: (57568,57568,57568) grey88
225: (57825,57825,57825) #E1E1E1E1E1E1
226: (58082,58082,58082) #E2E2E2E2E2E2
227: (58339,58339,58339) grey89
228: (58596,58596,58596) #E4E4E4E4E4E4
229: (58853,58853,58853) grey90
230: (59110,59110,59110) #E6E6E6E6E6E6
231: (59367,59367,59367) #E7E7E7E7E7E7
232: (59624,59624,59624) grey91
233: (59881,59881,59881) #E9E9E9E9E9E9
234: (60138,60138,60138) #EAEAEAEAEAEA
235: (60395,60395,60395) grey92
236: (60652,60652,60652) #ECECECECECEC
237: (60909,60909,60909) grey93
238: (61166,61166,61166) #EEEEEEEEEEEE
239: (61423,61423,61423) #EFEFEFEFEFEF
240: (61680,61680,61680) grey94
241: (61937,61937,61937) #F1F1F1F1F1F1
242: (62194,62194,62194) grey95
243: (62451,62451,62451) #F3F3F3F3F3F3
244: (62708,62708,62708) #F4F4F4F4F4F4
245: (62965,62965,62965) grey96
246: (63222,63222,63222) #F6F6F6F6F6F6
247: (63479,63479,63479) grey97
248: (63736,63736,63736) #F8F8F8F8F8F8
249: (63993,63993,63993) #F9F9F9F9F9F9
250: (64250,64250,64250) grey98
251: (64507,64507,64507) #FBFBFBFBFBFB
252: (64764,64764,64764) grey99
253: (65021,65021,65021) #FDFDFDFDFDFD
254: (65278,65278,65278) #FEFEFEFEFEFE
255: (65535,65535,65535) grey100
Resolution: 400x400 pixels/inch
Filesize: 476.9kb
Interlace: None
Background Color: grey100
Border Color: #DFDFDFDFDFDF
Matte Color: grey74
Dispose: Undefined
Iterations: 0
Compression: None
signature: 31a9c6ef05d7a7e0682972465270f250d0b686507c0c41565b3922d21646dce9
Tainted: False
User Time: 0.030u
Elapsed Time: 0:01
 
?

-

Will ImageMagick's utilities work with 16 bit files? It might be like many
of the Photoshop tools in versions 7 and lower where they would not work
with 16 bit files. You might downsample your files to 8 bit in PS, save as
a new file name and then see if ImageMagick then works on the new 8 bit
file. Just a thought.

Doug
 
J

John

- said:
Will ImageMagick's utilities work with 16 bit files? It might be like many
of the Photoshop tools in versions 7 and lower where they would not work
with 16 bit files. You might downsample your files to 8 bit in PS, save as
a new file name and then see if ImageMagick then works on the new 8 bit
file. Just a thought.

Yes, it's suppose to. It can read 48-bit rgb files without problems.
It has no problems with 8/24 bit files.
 
E

Erik Krause

Hello, -
you wrote...
Will ImageMagick's utilities work with 16 bit files?

When I tried last time (some month ago) there was no 16 bit support in
ImageMagick. If you want to batch process 16 bit images, use photoshop
actions instead. You can even create droplets and use them as 'external
viewer' in vuescan (at least in windows version, where a droplet is a
standard .exe file)
 
J

John

Erik said:
Hello, -
you wrote...


When I tried last time (some month ago) there was no 16 bit support in
ImageMagick. If you want to batch process 16 bit images, use photoshop
actions instead. You can even create droplets and use them as 'external
viewer' in vuescan (at least in windows version, where a droplet is a
standard .exe file)

Got it working. Turned out the default download for "Windows Executable"
was version Q8. The latest version is Q16. After installing, Q16 is
working fine. 16-bit works fine.
 
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