1 | #!/usr/bin/env python |
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2 | #****************************************************************************** |
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3 | # $Id: pct2rgb.py 18194 2009-12-06 20:07:45Z rouault $ |
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4 | # |
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5 | # Name: pct2rgb |
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6 | # Project: GDAL Python Interface |
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7 | # Purpose: Utility to convert palletted images into RGB (or RGBA) images. |
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8 | # Author: Frank Warmerdam, warmerdam@pobox.com |
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9 | # |
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10 | #****************************************************************************** |
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11 | # Copyright (c) 2001, Frank Warmerdam |
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12 | # |
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13 | # Permission is hereby granted, free of charge, to any person obtaining a |
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14 | # copy of this software and associated documentation files (the "Software"), |
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15 | # to deal in the Software without restriction, including without limitation |
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16 | # the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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17 | # and/or sell copies of the Software, and to permit persons to whom the |
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18 | # Software is furnished to do so, subject to the following conditions: |
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19 | # |
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20 | # The above copyright notice and this permission notice shall be included |
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21 | # in all copies or substantial portions of the Software. |
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22 | # |
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23 | # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
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24 | # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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25 | # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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26 | # THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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27 | # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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28 | # FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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29 | # DEALINGS IN THE SOFTWARE. |
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30 | #****************************************************************************** |
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31 | |
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32 | try: |
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33 | from osgeo import gdal |
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34 | gdal.TermProgress = gdal.TermProgress_nocb |
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35 | except ImportError: |
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36 | import gdal |
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37 | |
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38 | try: |
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39 | import numpy as Numeric |
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40 | Numeric.arrayrange = Numeric.arange |
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41 | except ImportError: |
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42 | import Numeric |
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43 | |
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44 | |
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45 | import sys |
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46 | import os.path |
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47 | |
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48 | def Usage(): |
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49 | print('Usage: pct2rgb.py [-of format] [-b <band>] source_file dest_file') |
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50 | sys.exit(1) |
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51 | |
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52 | # ============================================================================= |
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53 | # Mainline |
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54 | # ============================================================================= |
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55 | |
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56 | format = 'GTiff' |
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57 | src_filename = None |
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58 | dst_filename = None |
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59 | out_bands = 3 |
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60 | band_number = 1 |
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61 | |
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62 | gdal.AllRegister() |
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63 | argv = gdal.GeneralCmdLineProcessor( sys.argv ) |
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64 | if argv is None: |
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65 | sys.exit( 0 ) |
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66 | |
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67 | # Parse command line arguments. |
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68 | i = 1 |
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69 | while i < len(argv): |
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70 | arg = argv[i] |
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71 | |
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72 | if arg == '-of': |
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73 | i = i + 1 |
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74 | format = argv[i] |
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75 | |
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76 | elif arg == '-b': |
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77 | i = i + 1 |
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78 | band_number = int(argv[i]) |
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79 | |
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80 | elif arg == '-rgba': |
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81 | out_bands = 4 |
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82 | |
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83 | elif src_filename is None: |
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84 | src_filename = argv[i] |
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85 | |
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86 | elif dst_filename is None: |
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87 | dst_filename = argv[i] |
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88 | |
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89 | else: |
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90 | Usage() |
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91 | |
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92 | i = i + 1 |
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93 | |
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94 | if dst_filename is None: |
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95 | Usage() |
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96 | |
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97 | # ---------------------------------------------------------------------------- |
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98 | # Open source file |
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99 | |
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100 | src_ds = gdal.Open( src_filename ) |
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101 | if src_ds is None: |
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102 | print('Unable to open ', src_filename) |
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103 | sys.exit(1) |
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104 | |
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105 | src_band = src_ds.GetRasterBand(band_number) |
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106 | |
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107 | # ---------------------------------------------------------------------------- |
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108 | # Ensure we recognise the driver. |
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109 | |
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110 | dst_driver = gdal.GetDriverByName(format) |
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111 | if dst_driver is None: |
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112 | print('"%s" driver not registered.' % format) |
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113 | sys.exit(1) |
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114 | |
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115 | # ---------------------------------------------------------------------------- |
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116 | # Build color table. |
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117 | |
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118 | lookup = [ Numeric.arrayrange(256), |
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119 | Numeric.arrayrange(256), |
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120 | Numeric.arrayrange(256), |
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121 | Numeric.ones(256)*255 ] |
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122 | |
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123 | ct = src_band.GetRasterColorTable() |
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124 | |
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125 | if ct is not None: |
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126 | for i in range(min(256,ct.GetCount())): |
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127 | entry = ct.GetColorEntry(i) |
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128 | for c in range(4): |
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129 | lookup[c][i] = entry[c] |
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130 | |
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131 | # ---------------------------------------------------------------------------- |
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132 | # Create the working file. |
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133 | |
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134 | if format == 'GTiff': |
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135 | tif_filename = dst_filename |
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136 | else: |
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137 | tif_filename = 'temp.tif' |
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138 | |
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139 | gtiff_driver = gdal.GetDriverByName( 'GTiff' ) |
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140 | |
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141 | tif_ds = gtiff_driver.Create( tif_filename, |
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142 | src_ds.RasterXSize, src_ds.RasterYSize, out_bands ) |
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143 | |
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144 | |
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145 | # ---------------------------------------------------------------------------- |
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146 | # We should copy projection information and so forth at this point. |
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147 | |
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148 | tif_ds.SetProjection( src_ds.GetProjection() ) |
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149 | tif_ds.SetGeoTransform( src_ds.GetGeoTransform() ) |
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150 | if src_ds.GetGCPCount() > 0: |
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151 | tif_ds.SetGCPs( src_ds.GetGCPs(), src_ds.GetGCPProjection() ) |
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152 | |
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153 | # ---------------------------------------------------------------------------- |
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154 | # Do the processing one scanline at a time. |
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155 | |
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156 | gdal.TermProgress( 0.0 ) |
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157 | for iY in range(src_ds.RasterYSize): |
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158 | src_data = src_band.ReadAsArray(0,iY,src_ds.RasterXSize,1) |
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159 | |
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160 | for iBand in range(out_bands): |
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161 | band_lookup = lookup[iBand] |
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162 | |
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163 | dst_data = Numeric.take(band_lookup,src_data) |
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164 | tif_ds.GetRasterBand(iBand+1).WriteArray(dst_data,0,iY) |
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165 | |
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166 | gdal.TermProgress( (iY+1.0) / src_ds.RasterYSize ) |
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167 | |
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168 | |
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169 | tif_ds = None |
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170 | |
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171 | # ---------------------------------------------------------------------------- |
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172 | # Translate intermediate file to output format if desired format is not TIFF. |
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173 | |
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174 | if tif_filename != dst_filename: |
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175 | tif_ds = gdal.Open( tif_filename ) |
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176 | dst_driver.CreateCopy( dst_filename, tif_ds ) |
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177 | tif_ds = None |
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178 | |
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179 | gtiff_driver.Delete( tif_filename ) |
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180 | |
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181 | |
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182 | |
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183 | |
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184 | |
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185 | |
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186 | |
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