Initial commit

.gitattributes

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+# Auto detect text files and perform LF normalization
+* text=auto

imoverlay.m

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+function out = imoverlay(in, mask, color)
+%IMOVERLAY Create a mask-based image overlay.
+%   OUT = IMOVERLAY(IN, MASK, COLOR) takes an input image, IN, and a binary
+%   image, MASK, and produces an output image whose pixels in the MASK
+%   locations have the specified COLOR.
+%
+%   IN should be a grayscale or an RGB image of class uint8, uint16, int16,
+%   logical, double, or single.  If IN is double or single, it should be in
+%   the range [0, 1].  If it is not in that range, you might want to use
+%   mat2gray to scale it into that range.
+%
+%   MASK should be a two-dimensional logical matrix.
+%
+%   COLOR should be a 1-by-3 vector of values in the range [0, 1].  [0 0 0]
+%   is black, and [1 1 1] is white.
+%
+%   OUT is a uint8 RGB image.
+%
+%   Examples
+%   --------
+%   Overlay edge detection result in green over the original image.
+%       
+%       I = imread('cameraman.tif');
+%       bw = edge(I, 'canny');
+%       rgb = imoverlay(I, bw, [0 1 0]);
+%       imshow(rgb)
+%
+%   Treating the output of peaks as an image, overlay the values greater than
+%   7 in red.  The output of peaks is not in the usual grayscale image range
+%   of [0, 1], so use mat2gray to scale it.
+%
+%       I = peaks;
+%       mask = I > 7;
+%       rgb = imoverlay(mat2gray(I), mask, [1 0 0]);
+%       imshow(rgb, 'InitialMagnification', 'fit')
+
+%   Steven L. Eddins
+%   Copyright 2006-2012 The MathWorks, Inc.
+
+% If the user doesn't specify the color, use white.
+DEFAULT_COLOR = [1 1 1];
+if nargin < 3
+    color = DEFAULT_COLOR;
+end
+
+% Force the 2nd input to be logical.
+mask = (mask ~= 0);
+
+% Make the uint8 the working data class.  The output is also uint8.
+in_uint8 = im2uint8(in);
+color_uint8 = im2uint8(color);
+
+% Initialize the red, green, and blue output channels.
+if ndims(in_uint8) == 2
+    % Input is grayscale.  Initialize all output channels the same.
+    out_red   = in_uint8;
+    out_green = in_uint8;
+    out_blue  = in_uint8;
+else
+    % Input is RGB truecolor.
+    out_red   = in_uint8(:,:,1);
+    out_green = in_uint8(:,:,2);
+    out_blue  = in_uint8(:,:,3);
+end
+
+% Replace output channel values in the mask locations with the appropriate
+% color value.
+out_red(mask)   = color_uint8(1);
+out_green(mask) = color_uint8(2);
+out_blue(mask)  = color_uint8(3);
+
+% Form an RGB truecolor image by concatenating the channel matrices along
+% the third dimension.
+out = cat(3, out_red, out_green, out_blue);