Function holoscan::viz::ImageComponentMapping

Specifies how the color components of an image are mapped to the color components of the output. Output components can be set to the R, G, B or A component of the input or fixed to zero or one or just identical to the input.

Default: all output components are identical to the input components (ComponentSwizzle::IDENTITY).

This can be used display an image in color formats which are not natively supported by Holoviz. For example to display a BGRA image:

            

            
ImageComponentMapping(ComponentSwizzle::B, ComponentSwizzle::G, ComponentSwizzle::R,
  ComponentSwizzle::A);
ImageHost(width, height, ImageFormat::R8G8B8A8_UNORM, bgra_data);
        

or to display a single component image in gray scale:

            

            
ImageComponentMapping(ComponentSwizzle::R, ComponentSwizzle::R, ComponentSwizzle::R,
  ComponentSwizzle::ONE);
ImageHost(width, height, ImageFormat::R8_UNORM, single_component_data);
        

Parameters

r, g, b, a – sets how the component values are placed in each component of the output