1img-raw(n) Img img-raw(n)
2
6 img-raw - Img, Raw Data Format (raw)
7
9 package require Tk
10 package require img::raw ?1.4?
12 image create photo ?name? ?options?
14
17 The package img::raw is a sub-package of Img. It can be loaded as a
18 part of the complete Img support, via package require Img, or on its
19 own, via package require img::raw.
20 Like all packages of Img it does not provide new commands, but extends
22 the existing Tk command image so that it supports files containing
23 raster images in the Raw Data Format (raw). More specifically img::raw
24 extends Tk's photo image type.
25 The name of the new format handler is raw. This handler provides new
27 additional configuration options. See section RAW OPTIONS for more
28 detailed explanations.
29 All of the above means that in a call like
31 image create photo ?name? ?options?
33 [1] Image data in raw format (options -data and -file) is detected
35 automatically.
36 [2] The format name raw is recognized by the option -format. In
38 addition the value for the option is treated as list and may
39 contain any of the special options listed in section RAW
40 OPTIONS.
41
43 This format handler must be loaded explicitly with package require
44 img::raw.
45
47 Grayscale image: 1 channel of 32-bit floating point values.
48 1 channel of 16-bit unsigned integer values.
49 1 channel of 8-bit unsigned integer values.
50 True-color image: 3 channels of 32-bit floating point values.
51 3 channels of 16-bit unsigned integer values.
52 3 channels of 8-bit unsigned integer values.
53 List of currently supported features:
55 Type | Read | Write |
57 | -file | -data | -file | -data |
58 ----------------------------------------
59 Gray | Yes | Yes | Yes | Yes |
60 RGB | Yes | Yes | Yes | Yes |
61 There are 2 supported file formats:
63 One with the pure raw data only, the other with a 7 line ASCII header
64 of the following form:
65 Magic=RAW\n File format identifier. Fixed value.
67 Width=128\n Image width in pixels.
68 Height=128\n Image height in pixels.
69 NumChan=1\n Possible values: 1 or 3.
70 ByteOrder=Intel\n Possible values: "Intel" or "Motorola".
71 ScanOrder=TopDown\n Possible values: "TopDown" or "BottomUp".
72 PixelType=byte\n Possible values: "float", "short" or "byte".
73
77 The handler provides the following options:
78 -verbose bool
80 This option is supported for reading and writing.
81 If set to true, additional information about the loaded/stored
83 image is printed to stdout. Default is false.
84 -useheader bool
86 This option is supported for reading and writing.
87 If set to true, use the file header information for reading and
89 writing. Default is true.
90 -nchan int
92 This option is supported for reading and writing image data
93 without header.
94 Specify the number of channels of the input image. Default is
96 1.
97 -width int
99 This option is supported for reading image data without header
100 only.
101 Specify the width of the input image. Default is 128.
103 -height int
105 This option is supported for reading image data without header
106 only.
107 Specify the height of the input image. Default is 128.
109 -byteorder string
111 This option is supported for reading image data without header
112 only.
113 Specify the byteorder of the input image data. Possible values:
115 Intel or Motorola. Default is assuming the same byteorder as
116 that of the host computer.
117 -uuencode bool
119 This option is supported for reading image data without header
120 only.
121 If set to false, do not assume, that the image data stored in a
123 Tcl variable is uuencoded. Default is true, i.e. the image data
124 in a Tcl variable is assumed to be uuencoded.
125 -scanorder string
127 This option is supported for reading and writing image data
128 without header.
129 Specify the scanline order of the input image. Possible values:
131 TopDown or BottomUp. Default is assuming the same byteorder as
132 that of the host computer.
133 -pixeltype string
135 This option is supported for reading image data without header
136 only.
137 Specify the type of the pixel values. Possible values: float or
139 short or byte. Default is byte.
140 RAW files are always written in byte pixel format.
142 -gamma float
144 This option is supported for reading only.
145 Specify a gamma correction to be applied when mapping the input
147 data to 8-bit image values. Default is 1.0.
148 -nomap bool
150 This option is supported for reading only.
151 If set to true, no mapping of input values is done. Use this
153 option, if your image already contains RGB values in the range
154 of 0 .. 255. Default is false.
155 -min float
157 This option is supported for reading only.
158 Specify the minimum pixel value to be used for mapping the input
160 data to 8-bit image values. Default is the minimum value found
161 in the image data.
162 -max float
164 This option is supported for reading only.
165 Specify the maximum pixel value to be used for mapping the input
167 data to 8-bit image values. Default is the maximum value found
168 in the image data.
169
171 img-bmp, img-dted, img-gif, img-ico, img-intro, img-jpeg, img-pcx, img-
172 pixmap, img-png, img-ppm, img-ps, img-raw, img-sgi, img-sun, img-tga,
173 img-tiff, img-window, img-xbm, img-xpm
174
176 image handling, raw, tk
177
179 Copyright (c) 1995-2009 Jan Nijtmans <nijtmans@users.sourceforge.net>
180img-raw 1.4 img-raw(n)