t_ipDemosaic

Illustrate calls to different demosaicing methods. Does this with the camera method. Illustrating the actions in the critical image processing 'Demosaic'.

Wandell, July, 2019

Contents

ieInit

If setting ip method by hand, do this

scene = sceneCreate;
oi = oiCreate; sensor = sensorCreate; ip = ipCreate;
oi = oiCompute(oi,scene); sensor = sensorCompute(sensor,oi);
ip = ipSet(ip,'demosaic method','bilinear');
ip = ipCompute(ip,sensor);
ipWindow(ip);

Here is the way to do it with the camera object

% This is the Demosaic call from inside of ipCompute (called also by
% cameraCompute). In this illustration, there is no sensor or illuminant
% correction
fprintf('Demosaic method:  %s\n',ipGet(ip,'demosaic method'));

d = Demosaic(ip,sensor);
ieNewGraphWin; imagescRGB(d);

Demosaic method:  bilinear

Alternative demosaicing method

camera = cameraCreate;
camera = cameraCompute(camera,scene);

camera = cameraSet(camera,'ip demosaic method','adaptive laplacian');
camera = cameraCompute(camera,scene);
cameraWindow(camera,'ip');

Camera from default oi,sensor and ip

camera = cameraSet(camera,'ip demosaic method','laplacian');
camera = cameraCompute(camera,scene);
cameraWindow(camera,'ip');

camera = cameraSet(camera,'ip demosaic method','nearest neighbor');
camera = cameraCompute(camera,scene);
cameraWindow(camera,'ip');

A special case for ans RCCC automotive sensor demosaic'd into a monochrome image

sensor = sensorCreate('MT9V024',[],'rccc');
camera = cameraSet(camera,'sensor',sensor);
camera = cameraSet(camera,'ip demosaic method','analog rccc');
camera = cameraCompute(camera,scene);
cameraWindow(camera,'sensor');
cameraWindow(camera,'ip')

ans = 

  struct with fields:

                    name: 'MTV9V024-RCCC'
                    type: 'vcimage'
                spectrum: [1×1 struct]
                metadata: []
                    data: [1×1 struct]
                 display: [1×1 struct]
         transformMethod: 'adaptive'
                demosaic: [1×1 struct]
    illuminantCorrection: [1×1 struct]
              internalCS: 'XYZ'
        sensorCorrection: [1×1 struct]
                  render: [1×1 struct]

For monochrome, Demosaic does nothing.

scene = sceneCreate;
sensor = sensorCreate('monochrome');
camera = cameraSet(camera,'sensor',sensor);
camera = cameraCompute(camera,scene);
cameraWindow(camera,'ip')

ans = 

  struct with fields:

                    name: 'monochrome-1'
                    type: 'vcimage'
                spectrum: [1×1 struct]
                metadata: []
                    data: [1×1 struct]
                 display: [1×1 struct]
         transformMethod: 'adaptive'
                demosaic: [1×1 struct]
    illuminantCorrection: [1×1 struct]
              internalCS: 'XYZ'
        sensorCorrection: [1×1 struct]
                  render: [1×1 struct]

Published with MATLAB® R2024a