Function:RGB2Gray

From CUVI Wiki

Converts an RGB image to gray scale using fixed or custom transform coefficients

Function

CuviStatus rgb2gray(const CuviImage& src,
                    CuviImage& dst,
                    const CuviStream& stream = CuviStream());

CuviStatus rgb2gray(const CuviImage& src,
                    CuviImage& dst,
                    const CuviScalar& coeffs,
                    const CuviStream& stream = CuviStream());

Parameters

Name Type Description
src CuviImage& Input 3 channel image
dst CuviImage& Output single channel image
coeffs CuviScalar& Custom transformation coefficients
stream CuviStream& GPU stream ID for execution

Image Type Support

Input Output
8uC3 8uC1
16uC3 16uC1
32fC3 32fC1

Sample

Error creating thumbnail: Unable to save thumbnail to destination
Color Image


Error creating thumbnail: Unable to save thumbnail to destination
Output Gray Image


Example

CuviImage gimg = cuvi::io::loadImage(path), gout;

//Convert to gray-scale using standard coefficients
cuvi::colorOperations::rgb2gray(gimg,gout);

//Convert to gray-scale using custom coefficients
CuviScalar coeffs(0.33, 0.33, 0.33);
cuvi::colorOperations::rgb2gray(gimg,gout, coeffs);