how to convert the rgb in to gray for this code?

Question

nirai selvi 2015-12-18

0
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https://ww2.mathworks.cn/matlabcentral/answers/260853-how-to-convert-the-rgb-in-to-gray-for-this-code

回答： Guillaume 2015-12-18

% Create a detector object faceDetector = vision.CascadeObjectDetector; % Read input image [basefilename, pathname ] = uigetfile({'*.jpg';'*.png';'*.bmp'},'File selector'); filename= fullfile(pathname, basefilename); I = imread(filename);

% Detect faces bbox = step(faceDetector, I); disp(bbox); % Create a shape inserter object to draw bounding boxes around detections shapeInserter = vision.ShapeInserter('BorderColor','Custom','CustomBorderColor',[255 255 0]);

% Draw boxes around detected faces and display results I_faces = step(shapeInserter, I, int32(bbox)); figure, imshow(I_faces), title('Detected face');