def get_normalized_spectral_line_colors_annotated ( brightness = 1.0, num_purples = 0, dwl_angstroms = 10): '''Get an array of xyz colors covering the visible spectrum. Optionally add a number of 'purples', which are colors interpolated between the color of the lowest wavelength (violet) and the highest (red). A text string describing the color is supplied for each color. brightness - Desired maximum rgb component of each color. Default 1.0. (Maxiumum displayable brightness) num_purples - Number of colors to interpolate in the 'purple' range. Default 0. (No purples) dwl_angstroms - Wavelength separation, in angstroms (0.1 nm). Default 10 A. (1 nm spacing) ''' # get range of wavelengths, in angstroms, so that we can have finer resolution than 1 nm wl_angstrom_range = range (10*start_wl_nm, 10*(end_wl_nm + 1), dwl_angstroms) # get total point count num_spectral = len (wl_angstrom_range) num_points = num_spectral + num_purples xyzs = numpy.empty ((num_points, 3)) names = [] # build list of normalized color x,y values proceeding along each wavelength i = 0 for wl_A in wl_angstrom_range: wl_nm = wl_A * 0.1 xyz = xyz_from_wavelength (wl_nm) colormodels.xyz_normalize (xyz) xyzs [i] = xyz name = '%.1f nm' % wl_nm names.append (name) i += 1 # interpolate from end point to start point (filling in the purples) first_xyz = xyzs [0] last_xyz = xyzs [num_spectral - 1] for ipurple in range (0, num_purples): t = float (ipurple) / float (num_purples - 1) omt = 1.0 - t xyz = t * first_xyz + omt * last_xyz colormodels.xyz_normalize (xyz) xyzs [i] = xyz name = '%03d purple' % math.floor (1000.0 * t + 0.5) names.append (name) i += 1 # scale each color to have the max rgb component equal to the desired brightness for i in range (0, num_points): rgb = colormodels.brightest_rgb_from_xyz (xyzs [i], brightness) xyzs [i] = colormodels.xyz_from_rgb (rgb) # done return (xyzs, names)
def visible_spectrum_table(filename='visible_spectrum.html'): '''Write an HTML table with the visible spectrum colors.''' spectrum = ciexyz.empty_spectrum() (num_wl, num_cols) = spectrum.shape # get rgb colors for each wavelength rgb_colors_1 = numpy.empty((num_wl, 3)) rgb_colors_2 = numpy.empty((num_wl, 3)) for i in range(0, num_wl): xyz = ciexyz.xyz_from_wavelength(spectrum[i][0]) rgb_1 = colormodels.rgb_from_xyz(xyz) rgb_2 = colormodels.brightest_rgb_from_xyz(xyz) rgb_colors_1[i] = rgb_1 rgb_colors_2[i] = rgb_2 # scale 1 to make brightest rgb value = 1.0 rgb_max = numpy.max(rgb_colors_1) scaling = 1.0 / rgb_max rgb_colors_1 *= scaling # write HTML file def write_link(f, url, text): '''Write an html link.''' link = '<a href="%s">%s</a><br/>\n' % (url, text) f.write(link) f = open(filename, 'w') # html headers f.write('<html>\n') f.write('<head>\n') f.write('<title>Colors of Pure Spectral Lines</title>\n') f.write('</head>\n') f.write('<body>\n') f.write('<p><h1>Colors of Pure Spectral Lines</h1></p>\n') f.write('<p>%s</p>\n' % 'White added to undisplayable pure colors to fit into rgb space.') f.write('<hr/>\n') # table header f.write('<table border cellpadding="5">\n') f.write('<tr>\n') f.write('<th>Wavelength</th>\n') f.write('<th>R</th>\n') f.write('<th>G</th>\n') f.write('<th>B</th>\n') f.write('<th>Hex Code</th>\n') f.write('<th width=200>Full Brightness</th>\n') f.write('<th width=200>Perceptual Brightness</th>\n') f.write('</tr>\n') # each row for i in range(0, num_wl): irgb_1 = colormodels.irgb_from_rgb(rgb_colors_1[i]) irgb_2 = colormodels.irgb_from_rgb(rgb_colors_2[i]) red = irgb_2[0] green = irgb_2[1] blue = irgb_2[2] hexstr_1 = colormodels.irgb_string_from_irgb(irgb_1) hexstr_2 = colormodels.irgb_string_from_irgb(irgb_2) iwl = spectrum[i][0] code = '%.1f nm' % iwl f.write('<tr>\n') f.write('<td>%s</td>\n' % (code)) f.write('<td>%d</td>\n' % (red)) f.write('<td>%d</td>\n' % (green)) f.write('<td>%d</td>\n' % (blue)) f.write('<td>%s</td>\n' % (hexstr_2)) swatch = " " f.write('<td bgcolor="%s">%s</td>\n' % (hexstr_2, swatch)) f.write('<td bgcolor="%s">%s</td>\n' % (hexstr_1, swatch)) f.write('</tr>\n') f.write('</table>\n') # references f.write('<hr/>\n') f.write('<p>References</p>\n') # one source for data write_link(f, 'http://goffgrafix.com/pantone-rgb-100.php', 'Goffgrafix.com') # another source with basically the same data write_link(f, 'http://www.sandaleo.com/pantone.asp', 'Sandaleo.com') # one with more colors including metallic (also some errors), not quite consistent with the first two write_link( f, 'http://www.loral.org/Z/Colors/100.html', 'Loral.org - Conversions based on CorelDRAW v12 Pantone Solid Coated or Pastel Coated tables and sRGB color space.' ) # some colors for various sports teams write_link( f, 'http://www.pennjersey.info/forums/questions-answers/7895-pantone-colors-colleges-university-mlb-nfl-teams.html', 'Pantone colors for some sports teams.') # some colors for various national flags write_link( f, 'http://desktoppub.about.com/od/colorpalettes/l/aa_flagcolors.htm', 'What color is your flag? Pantone colors for some flags.') write_link(f, 'http://desktoppub.about.com/library/weekly/blcpflagsrwb.htm', 'Red, White, & Blue - Pantone colors for some flags.') write_link( f, 'http://desktoppub.about.com/library/weekly/blcpflagsyellow.htm', 'Yellow or Gold - Pantone colors for some flags.') write_link( f, 'http://desktoppub.about.com/library/weekly/blcpflagsgreen.htm', 'Green - Pantone colors for some flags.') write_link( f, 'http://desktoppub.about.com/library/weekly/blcpatrioticswatches.htm', 'Color swatches - Pantone colors for some flags.') # official Pantone webpages write_link(f, 'http://pantone.com/pages/pantone/Pantone.aspx?pg=19970&ca=25', 'An official PANTONE page') write_link(f, 'http://pantone.com/pages/products/product.aspx?ca=1&pid=293&', 'Another official PANTONE page') # html ending f.write('</body>\n') f.write('</html>\n') f.close()
def visible_spectrum_table (filename='visible_spectrum.html'): '''Write an HTML table with the visible spectrum colors.''' spectrum = ciexyz.empty_spectrum() (num_wl, num_cols) = spectrum.shape # get rgb colors for each wavelength rgb_colors_1 = numpy.empty ((num_wl, 3)) rgb_colors_2 = numpy.empty ((num_wl, 3)) for i in range (0, num_wl): xyz = ciexyz.xyz_from_wavelength (spectrum [i][0]) rgb_1 = colormodels.rgb_from_xyz (xyz) rgb_2 = colormodels.brightest_rgb_from_xyz (xyz) rgb_colors_1 [i] = rgb_1 rgb_colors_2 [i] = rgb_2 # scale 1 to make brightest rgb value = 1.0 rgb_max = numpy.max (rgb_colors_1) scaling = 1.0 / rgb_max rgb_colors_1 *= scaling # write HTML file def write_link (f, url, text): '''Write an html link.''' link = '<a href="%s">%s</a><br/>\n' % (url, text) f.write (link) f = open (filename, 'w') # html headers f.write ('<html>\n') f.write ('<head>\n') f.write ('<title>Colors of Pure Spectral Lines</title>\n') f.write ('</head>\n') f.write ('<body>\n') f.write ('<p><h1>Colors of Pure Spectral Lines</h1></p>\n') f.write ('<p>%s</p>\n' % 'White added to undisplayable pure colors to fit into rgb space.') f.write ('<hr/>\n') # table header f.write ('<table border cellpadding="5">\n') f.write ('<tr>\n') f.write ('<th>Wavelength</th>\n') f.write ('<th>R</th>\n') f.write ('<th>G</th>\n') f.write ('<th>B</th>\n') f.write ('<th>Hex Code</th>\n') f.write ('<th width=200>Full Brightness</th>\n') f.write ('<th width=200>Perceptual Brightness</th>\n') f.write ('</tr>\n') # each row for i in range (0, num_wl): irgb_1 = colormodels.irgb_from_rgb (rgb_colors_1 [i]) irgb_2 = colormodels.irgb_from_rgb (rgb_colors_2 [i]) red = irgb_2 [0] green = irgb_2 [1] blue = irgb_2 [2] hexstr_1 = colormodels.irgb_string_from_irgb (irgb_1) hexstr_2 = colormodels.irgb_string_from_irgb (irgb_2) iwl = spectrum [i][0] code = '%.1f nm' % iwl f.write ('<tr>\n') f.write ('<td>%s</td>\n' % (code)) f.write ('<td>%d</td>\n' % (red)) f.write ('<td>%d</td>\n' % (green)) f.write ('<td>%d</td>\n' % (blue)) f.write ('<td>%s</td>\n' % (hexstr_2)) swatch = " " f.write ('<td bgcolor="%s">%s</td>\n' % (hexstr_2, swatch)) f.write ('<td bgcolor="%s">%s</td>\n' % (hexstr_1, swatch)) f.write ('</tr>\n') f.write ('</table>\n') # references f.write ('<hr/>\n') f.write ('<p>References</p>\n') # one source for data write_link (f, 'http://goffgrafix.com/pantone-rgb-100.php', 'Goffgrafix.com') # another source with basically the same data write_link (f, 'http://www.sandaleo.com/pantone.asp', 'Sandaleo.com') # one with more colors including metallic (also some errors), not quite consistent with the first two write_link (f, 'http://www.loral.org/Z/Colors/100.html', 'Loral.org - Conversions based on CorelDRAW v12 Pantone Solid Coated or Pastel Coated tables and sRGB color space.') # some colors for various sports teams write_link (f, 'http://www.pennjersey.info/forums/questions-answers/7895-pantone-colors-colleges-university-mlb-nfl-teams.html', 'Pantone colors for some sports teams.') # some colors for various national flags write_link (f, 'http://desktoppub.about.com/od/colorpalettes/l/aa_flagcolors.htm', 'What color is your flag? Pantone colors for some flags.') write_link (f, 'http://desktoppub.about.com/library/weekly/blcpflagsrwb.htm', 'Red, White, & Blue - Pantone colors for some flags.') write_link (f, 'http://desktoppub.about.com/library/weekly/blcpflagsyellow.htm', 'Yellow or Gold - Pantone colors for some flags.') write_link (f, 'http://desktoppub.about.com/library/weekly/blcpflagsgreen.htm', 'Green - Pantone colors for some flags.') write_link (f, 'http://desktoppub.about.com/library/weekly/blcpatrioticswatches.htm', 'Color swatches - Pantone colors for some flags.') # official Pantone webpages write_link (f, 'http://pantone.com/pages/pantone/Pantone.aspx?pg=19970&ca=25', 'An official PANTONE page') write_link (f, 'http://pantone.com/pages/products/product.aspx?ca=1&pid=293&', 'Another official PANTONE page') # html ending f.write ('</body>\n') f.write ('</html>\n') f.close()
def get_brightest_irgb_string(xyz): '''Convert the xyz color to rgb, scale to maximum displayable brightness, and convert to a string.''' rgb = colormodels.brightest_rgb_from_xyz(xyz) color_string = colormodels.irgb_string_from_rgb(rgb) return color_string
def get_brightest_irgb_string (xyz): '''Convert the xyz color to rgb, scale to maximum displayable brightness, and convert to a string.''' rgb = colormodels.brightest_rgb_from_xyz (xyz) color_string = colormodels.irgb_string_from_rgb (rgb) return color_string