ImageDev

ColorToLightness

Extracts the lightness plane of an RGB image in the HSL space.

Access to parameter description

For an introduction to image filters: section Color Transforms.

ColorToLightness computes the lightness component of the HSL space and provides it as output image.

See also

Function Syntax

This function returns the outputGrayImage output parameter. 
// Function prototype.
std::shared_ptr< iolink::ImageView >
colorToLightness( std::shared_ptr< iolink::ImageView > inputColorImage, std::shared_ptr< iolink::ImageView > outputGrayImage = NULL );
This function returns the outputGrayImage output parameter. 
// Function prototype.
color_to_lightness( input_color_image, output_gray_image = None )
This function returns the outputGrayImage output parameter. 
// Function prototype.
public static IOLink.ImageView
ColorToLightness( IOLink.ImageView inputColorImage, IOLink.ImageView outputGrayImage = null );

Class Syntax

Parameters

Class Name ColorToLightness

Parameter Name Description Type Supported Values Default Value
input
inputColorImage
The color RGB input image. Image Multispectral nullptr
output
outputGrayImage
The lightness output image (grayscale). Its spatial dimensions and type are forced to the same values as the input. Image nullptr

Object Examples

std::shared_ptr< iolink::ImageView > ateneub = ioformat::readImage( std::string( IMAGEDEVDATA_IMAGES_FOLDER ) + "ateneub.jpg" );

ColorToLightness colorToLightnessAlgo;
colorToLightnessAlgo.setInputColorImage( ateneub );
colorToLightnessAlgo.execute();

std::cout << "outputGrayImage:" << colorToLightnessAlgo.outputGrayImage()->toString();

ateneub = ioformat.read_image(imagedev_data.get_image_path("ateneub.jpg"))

color_to_lightness_algo = imagedev.ColorToLightness()
color_to_lightness_algo.input_color_image = ateneub
color_to_lightness_algo.execute()

print( "output_gray_image:", str( color_to_lightness_algo.output_gray_image ) );

ImageView ateneub = ViewIO.ReadImage( @"Data/images/ateneub.jpg" );

ColorToLightness colorToLightnessAlgo = new ColorToLightness
{
    inputColorImage = ateneub
};
colorToLightnessAlgo.Execute();

Console.WriteLine( "outputGrayImage:" + colorToLightnessAlgo.outputGrayImage.ToString() );

Function Examples

std::shared_ptr< iolink::ImageView > ateneub = ioformat::readImage( std::string( IMAGEDEVDATA_IMAGES_FOLDER ) + "ateneub.jpg" );

auto result = colorToLightness( ateneub );

std::cout << "outputGrayImage:" << result->toString();

ateneub = ioformat.read_image(imagedev_data.get_image_path("ateneub.jpg"))

result = imagedev.color_to_lightness( ateneub )

print( "output_gray_image:", str( result ) );

ImageView ateneub = ViewIO.ReadImage( @"Data/images/ateneub.jpg" );

IOLink.ImageView result = Processing.ColorToLightness( ateneub );

Console.WriteLine( "outputGrayImage:" + result.ToString() );