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24 .if n .po 0

25 .TH TIFFGT 1 "September 20, 2005" "libtiff"

26 .SH NAME

27 tiffgt \- display an image stored in a

28 .SM TIFF

29 file (Silicon Graphics version)

30 .SH SYNOPSIS

31 .B tiffgt

32 [

33 .I options

34 ]

35 .I "input.tif ..."

36 .SH DESCRIPTION

37 .I tiffgt

38 displays one or more images stored using the

39 Tag Image File Format, Revision 6.0.

40 Each image is placed in a fixed size window that the

41 user must position on the display (unless configured

42 otherwise through X defaults).

43 If the display has fewer than 24 bitplanes, or if the

44 image does not warrant full color, then

45 .SM RGB

46 color values are mapped to the closest values that exist in

47 the colormap (this is done using the

48 .I rgbi

49 routine found in the graphics utility library

50 .BR \-lgutil .)

51 .PP

52 .I tiffgt

53 correctly handles files with any of the following characteristics:

54 .sp .5

55 .in +0.5i

56 .ta \w'\fIPhotometricInterpretation\fP 'u

57 .nf

58 \fIBitsPerSample\fP 1, 2, 4, 8, 16

59 \fISamplesPerPixel\fP 1, 3, 4 (the 4th sample is ignored)

60 \fIPhotometricInterpretation\fP 0 (min-is-white), 1 (min-is-black), 2 (RGB), 3 (palette), 6 (YCbCr)

61 \fIPlanarConfiguration\fP 1 (contiguous), 2 (separate)

62 \fIOrientation\fP 1 (top-left), 4 (bottom-left)

63 .fi

64 .in -0.5i

65 .sp .5

66 Data may be organized as strips or tiles and may be

67 compressed with any of the compression algorithms supported

68 by the

69 .IR libtiff (3)

70 library.

71 .PP

72 For palette images (\c

73 .IR PhotometricInterpretation =3),

74 .I tiffgt

75 inspects the colormap values and assumes either 16-bit

76 or 8-bit values according to the maximum value.

77 That is, if no colormap entry greater than 255 is found,

78 .I tiffgt

79 assumes the colormap has only 8-bit values; otherwise

80 it assumes 16-bit values.

81 This inspection is done to handle old images written by

82 previous (incorrect) versions of

83 .IR libtiff .

84 .PP

85 .I tiffgt

86 can be used to display multiple images one-at-a-time.

87 The left mouse button switches the display to the first image in the

88 .I next

89 file in the list of files specified on the command line.

90 The right mouse button switches to the first image in the

91 .I previous

92 file in the list.

93 The middle mouse button causes the first image in the first file

94 specified on the command line to be displayed.

95 In addition the following keyboard commands are recognized:

96 .TP

97 .B b

98 Use a

99 .I PhotometricInterpretation

100 of MinIsBlack in displaying the current image.

101 .TP

102 .B l

103 Use a

104 .I FillOrder

105 of lsb-to-msb in decoding the current image.

106 .TP

107 .B m

108 Use a

109 .I FillOrder

110 of msb-to-lsb in decoding the current image.

111 .TP

112 .B c

113 Use a colormap visual to display the current image.

114 .TP

115 .B r

116 Use a true color (24-bit RGB) visual to display the current image.

117 .TP

118 .B w

119 Use a

120 .I PhotometricInterpretation

121 of MinIsWhite in displaying the current image.

122 .TP

123 .B W

124 Toggle (enable/disable) display of warning messages from the

125 .SM TIFF

126 library when decoding images.

127 .TP

128 .B E

129 Toggle (enable/disable) display of error messages from the

130 .SM TIFF

131 library when decoding images.

132 .TP

133 .B z

134 Reset all parameters to their default settings (\c

135 .IR FillOrder ,

136 .IR PhotometricInterpretation ,

137 handling of warnings and errors).

138 .TP

139 .B PageUp

140 Display the previous image in the current file or the last

141 image in the previous file.

142 .TP

143 .B PageDown

144 Display the next image in the current file or the first image

145 in the next file.

146 .TP

147 .B Home

148 Display the first image in the current file.

149 .TP

150 .B End

151 Display the last image in the current file (unimplemented).

152 .SH OPTIONS

153 .TP

154 .B \-c

155 Force image display in a colormap window.

156 .TP

157 .B \-d

158 Specify an image to display by directory number.

159 By default the first image in the file is displayed.

160 Directories are numbered starting at zero.

161 .TP

162 .B \-e

163 Enable reporting of error messages from the

164 .SM TIFF

165 library.

166 By default

167 .I tiffgt

168 silently ignores images that cannot be read.

169 .TP

170 .B \-f

171 Force

172 .I tiffgt

173 to run as a foreground process.

174 By default

175 .I tiffgt

176 will place itself in the background once it has opened the

177 requested image file.

178 .TP

179 .B \-l

180 Force the presumed bit ordering to be

181 .SM LSB

182 to

183 .SM MSB.

184 .TP

185 .B \-m

186 Force the presumed bit ordering to be

187 .SM MSB

188 to

189 .SM LSB.

190 .TP

191 .B \-o

192 Specify an image to display by directory offset.

193 By default the first image in the file is displayed.

194 Directories offsets may be specified using C-style syntax;

195 i.e. a leading ``0x'' for hexadecimal and a leading ``0'' for octal.

196 .TP

197 .B \-p

198 Override the value of the

199 .I PhotometricInterpretation

200 tag; the parameter may be one of:

201 .BR miniswhite ,

202 .BR minisblack ,

203 .BR rgb ,

204 .BR palette ,

205 .BR mask ,

206 .BR separated ,

207 .BR ycbcr ,

208 and

209 .BR cielab .

210 .TP

211 .B \-r

212 Force image display in a full color window.

213 .TP

214 .B \-s

215 Stop on the first read error.

216 By default all errors in the input data are ignored and

217 .I tiffgt

218 does it's best to display as much of an image as possible.

219 .TP

220 .B \-w

221 Enable reporting of warning messages from the

222 .SM TIFF

223 library.

224 By default

225 .I tiffgt

226 ignores warning messages generated when reading an image.

227 .TP

228 .B \-v

229 Place information in the title bar describing

230 what type of window (full color or colormap) is being

231 used, the name of the input file, and the directory

232 index of the image (if non-zero).

233 By default, the window type is not shown in the title bar.

234 .SH BUGS

235 Images wider and taller than the display are silently truncated to avoid

236 crashing old versions of the window manager.

237 .SH "SEE ALSO"

238 .BR tiffdump (1),

239 .BR tiffinfo (1),

240 .BR tiffcp (1),

241 .BR libtiff (3TIFF)

242 .PP

243 Libtiff library home page:

244 .BR http://www.remotesensing.org/libtiff/