1img-raw(n) Img img-raw(n)
2______________________________________________________________________________
6
8 img-raw - Img, Raw Data Format (raw)
9
11 package require Tk
12 package require img::raw ?1.4?
14 image create photo ?name? ?options?
16______________________________________________________________________________
18
20 The package img::raw is a sub-package of Img. It can be loaded as a
21 part of the complete Img support, via package require Img, or on its
22 own, via package require img::raw.
23 Like all packages of Img it does not provide new commands, but extends
25 the existing Tk command image so that it supports files containing
26 raster images in the Raw Data Format (raw). More specifically img::raw
27 extends Tk's photo image type.
28 The name of the new format handler is raw. This handler provides new
30 additional configuration options. See section RAW OPTIONS for more de‐
31 tailed explanations.
32 All of the above means that in a call like
34 image create photo ?name? ?options?
36 [1] Image data in raw format (options -data and -file) is detected
38 automatically.
39 [2] The format name raw is recognized by the option -format. In ad‐
41 dition the value for the option is treated as list and may con‐
42 tain any of the special options listed in section RAW OPTIONS.
43
45 This format handler must be loaded explicitly with package require
46 img::raw.
47
49 Grayscale image: 1 channel of 64-bit floating point values.
50 1 channel of 32-bit floating point values.
51 1 channel of 32-bit unsigned integer values.
52 1 channel of 16-bit unsigned integer values.
53 1 channel of 8-bit unsigned integer values.
54 True-color image: 3 channels of 64-bit floating point values.
55 3 channels of 32-bit floating point values.
56 3 channels of 32-bit unsigned integer values.
57 3 channels of 16-bit unsigned integer values.
58 3 channels of 8-bit unsigned integer values.
59 List of currently supported features:
61 Type | Read | Write |
63 | -file | -data | -file | -data |
64 ----------------------------------------
65 Gray | Yes | Yes | Yes | Yes |
66 RGB | Yes | Yes | Yes | Yes |
67 There are 2 supported file formats:
69 One with the pure raw data only, the other with a 7 line ASCII header
70 of the following form:
71 Magic=RAW\n File format identifier. Fixed value.
73 Width=128\n Image width in pixels.
74 Height=128\n Image height in pixels.
75 NumChan=1\n Possible values: 1 or 3.
76 ByteOrder=Intel\n Possible values: "Intel" or "Motorola".
77 ScanOrder=TopDown\n Possible values: "TopDown" or "BottomUp".
78 PixelType=byte\n Possible values: "double", "float", "int", "short" or "byte".
79
83 The handler provides the following options:
84 -verbose bool
86 This option is supported for reading and writing.
87 If set to true, additional information about the loaded/stored
89 image is printed to stdout. Default is false.
90 -useheader bool
92 This option is supported for reading and writing.
93 If set to true, use the file header information for reading and
95 writing. Default is true.
96 -nchan int
98 This option is supported for reading and writing image data
99 without header.
100 Specify the number of channels of the input image. Default is
102 1.
103 -width int
105 This option is supported for reading image data without header
106 only.
107 Specify the width of the input image. Default is 128.
109 -height int
111 This option is supported for reading image data without header
112 only.
113 Specify the height of the input image. Default is 128.
115 -byteorder string
117 This option is supported for reading image data without header
118 only.
119 Specify the byteorder of the input image data. Possible values:
121 Intel or Motorola. Default is assuming the same byteorder as
122 that of the host computer.
123 -uuencode bool
125 This option is supported for reading image data without header
126 only.
127 If set to false, do not assume, that the image data stored in a
129 Tcl variable is uuencoded. Default is true, i.e. the image data
130 in a Tcl variable is assumed to be uuencoded.
131 -scanorder string
133 This option is supported for reading and writing image data
134 without header.
135 Specify the scanline order of the input image. Possible values:
137 TopDown or BottomUp. Default is assuming the same byteorder as
138 that of the host computer.
139 -pixeltype string
141 This option is supported for reading image data without header
142 only.
143 Specify the type of the pixel values. Possible values: double
145 or float or int or short or byte. Default is byte.
146 RAW files are always written in byte pixel format.
148 -gamma float
150 This option is supported for reading only.
151 Specify a gamma correction to be applied when mapping the input
153 data to 8-bit image values. Default is 1.0.
154 -nomap bool
156 This option is supported for reading only.
157 If set to true, no mapping of input values is done. Use this
159 option, if your image already contains RGB values in the range
160 of 0 .. 255. When using the nomap mode, no information about
161 the minimum and maximum pixel values is gathered during reading
162 and therefore no verbose output is printed. On the other hand
163 reading the image is faster. Default is false.
164 -min float
166 This option is supported for reading only.
167 Specify the minimum pixel value to be used for mapping the input
169 data to 8-bit image values. Default is the minimum value found
170 in the image data.
171 -max float
173 This option is supported for reading only.
174 Specify the maximum pixel value to be used for mapping the input
176 data to 8-bit image values. Default is the maximum value found
177 in the image data.
178
180 img-bmp, img-dted, img-gif, img-ico, img-intro, img-jpeg, img-pcx, img-
181 pixmap, img-png, img-ppm, img-ps, img-raw, img-sgi, img-sun, img-tga,
182 img-tiff, img-window, img-xbm, img-xpm
183
185 image handling, raw, tk
186
188 Copyright (c) 1995-2009 Jan Nijtmans <nijtmans@users.sourceforge.net>
189img-raw 1.4 img-raw(n)