Python wavelength_to_XYZ示例

示例#1

文件： colour_utils.py 项目： TestaLab/Resolution_prediction_software

def wavelength_to_rgb(wavelength: float,
                      gamma: float = 2.4) -> Tuple[int, int, int]:
    """
    Converts a wavelength (in nanometres) to a gamma corrected RGB tuple with values [0, 255].
    Returns white if the wavelength is outside the visible spectrum or any other error occurs.
    """

    try:
        xyz = colour.wavelength_to_XYZ(wavelength)
        srgb = colour.XYZ_to_sRGB(xyz).clip(0, 1)
        gamma_corrected_rgb = 255 * srgb**(1 / gamma)
        return tuple(gamma_corrected_rgb)
    except ValueError:
        return 255, 255, 255

示例#2

def wavelengthToHex(wavelength: float, gamma: float = 2.4):
    """
    Converts a wavelength (in nanometres) to a gamma corrected RGB tuple with values [0, 255].
    Returns white if the wavelength is outside the visible spectrum or any other error occurs.
    """

    try:
        xyz = colour.wavelength_to_XYZ(wavelength)
        srgb = colour.XYZ_to_sRGB(xyz).clip(0, 1)
        gamma_corrected_rgb = 255 * srgb**(1 / gamma)
        chex = '#%02x%02x%02x' % (int(
            gamma_corrected_rgb[0]), int(
                gamma_corrected_rgb[1]), int(gamma_corrected_rgb[2]))
        return chex
    except ValueError:
        return 255, 255, 255

示例#3

文件： examples_tristimulus.py 项目： scooperly/colour

    755: 0.450,
    760: 0.462,
    765: 0.465,
    770: 0.448,
    775: 0.432,
    780: 0.421
}

spd = colour.SpectralPowerDistribution('Sample', sample_spd_data)

cmfs = colour.CMFS['CIE 1931 2 Degree Standard Observer']
illuminant = colour.ILLUMINANTS_RELATIVE_SPDS['A']

message_box(('Computing *CIE XYZ* tristimulus values for sample spectral '
             'power distribution and "CIE Standard Illuminant A".'))
print(colour.spectral_to_XYZ(spd, cmfs, illuminant))

print('\n')

message_box(('Computing "CIE Standard Illuminant A" chromaticity coordinates '
             'from its relative spectral power distribution.'))
print(colour.XYZ_to_xy(colour.spectral_to_XYZ(illuminant, cmfs)))

print('\n')

message_box(('Computing *CIE XYZ* tristimulus values for a single given '
             'wavelength in nm.'))
print(
    colour.wavelength_to_XYZ(
        546.1, colour.CMFS['CIE 1931 2 Degree Standard Observer']))

示例#4

文件： examples_tristimulus.py 项目： colour-science/colour

print(colour.sd_to_XYZ(sd_sample, cmfs, illuminant))

print("\n")

message_box(
    'Computing "CIE Standard Illuminant A" chromaticity coordinates from its '
    "spectral distribution.")
print(colour.XYZ_to_xy(colour.sd_to_XYZ(illuminant, cmfs) / 100))

print("\n")

message_box(
    "Computing *CIE XYZ* tristimulus values for a single given wavelength in "
    "nm.")
print(
    colour.wavelength_to_XYZ(
        546.1, colour.MSDS_CMFS["CIE 1931 2 Degree Standard Observer"]))

message_box(
    "Computing *CIE XYZ* tristimulus values from given multi-spectral image "
    "with shape (4, 3, 6).")
msds = np.array([
    [
        [
            0.01367208,
            0.09127947,
            0.01524376,
            0.02810712,
            0.19176012,
            0.04299992,
        ],
        [

示例#5

文件： wavelength.py 项目： ecs-vlc/opponency

def wavelength_to_rgb_2(wavelength):
    XYZ = colour.wavelength_to_XYZ(wavelength)
    RGB = colour.XYZ_to_sRGB(XYZ)
    return torch.Tensor(RGB)

示例#6

文件： examples_tristimulus.py 项目： Nick-Shaw/colour

    750: 0.436,
    755: 0.450,
    760: 0.462,
    765: 0.465,
    770: 0.448,
    775: 0.432,
    780: 0.421}

spd = colour.SpectralPowerDistribution('Sample', sample_spd_data)

cmfs = colour.CMFS['CIE 1931 2 Degree Standard Observer']
illuminant = colour.ILLUMINANTS_RELATIVE_SPDS['A']

message_box(('Computing *CIE XYZ* tristimulus values for sample spectral '
             'power distribution and "CIE Standard Illuminant A".'))
print(colour.spectral_to_XYZ(spd, cmfs, illuminant))

print('\n')

message_box(('Computing "CIE Standard Illuminant A" chromaticity coordinates '
             'from its relative spectral power distribution.'))
print(colour.XYZ_to_xy(colour.spectral_to_XYZ(illuminant, cmfs)))

print('\n')

message_box(('Computing *CIE XYZ* tristimulus values for a single given '
             'wavelength in nm.'))
print(colour.wavelength_to_XYZ(
    546.1,
    colour.CMFS['CIE 1931 2 Degree Standard Observer']))