Initial data commit

Task/Bitmap/MATLAB/bitmap-1.m

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+%Bitmap class
+%
+%Implements a class to manage bitmap images without the need for the
+%various conversion and display functions
+%
+%Available functions:
+%
+%fill(obj,color)
+%setPixel(obj,pixel,color)
+%getPixel(obj,pixel,[optional: color channel])
+%display(obj)
+%disp(obj)
+%plot(obj)
+%image(obj)
+%save(obj)
+%open(obj)
+
+classdef Bitmap
+
+    %% Public Properties
+    properties
+
+        %Channel arrays
+        red;
+        green;
+        blue;
+
+    end
+
+    %% Public Methods
+    methods
+
+        %Creates image and defaults it to black
+        function obj = Bitmap(width,height)
+            obj.red   = zeros(height,width,'uint8');
+            obj.green = zeros(height,width,'uint8');
+            obj.blue  = zeros(height,width,'uint8');
+        end % End Bitmap Constructor
+
+        %Fill the image with a specified color
+        %color = [red green blue] max for each is 255
+        function fill(obj,color)
+            obj.red(:,:)   = color(1);
+            obj.green(:,:) = color(2);
+            obj.blue(:,:)  = color(3);
+            assignin('caller',inputname(1),obj); %saves the changes to the object
+        end
+
+        %Set a pixel to a specified color
+        %pixel = [x y]
+        %color = [red green blue]
+        function setPixel(obj,pixel,color)
+            obj.red(pixel(2),pixel(1))   = color(1);
+            obj.green(pixel(2),pixel(1)) = color(2);
+            obj.blue(pixel(2),pixel(1))  = color(3);
+            assignin('caller',inputname(1),obj); %saves the changes to the object
+        end
+
+        %Get pixel color
+        %pixel = [x y]
+        %varargin can be:
+        %  no input for all channels
+        %  'r' or 'red' for red channel
+        %  'g' or 'green' for green channel
+        %  'b' or 'blue' for blue channel
+        function color = getPixel(obj,pixel,varargin)
+
+            if( ~isempty(varargin) )
+                switch (varargin{1})
+                    case {'r','red'}
+                        color = obj.red(pixel(2),pixel(1));
+                    case {'g','green'}
+                        color = obj.red(pixel(2),pixel(1));
+                    case {'b','blue'}
+                        color = obj.red(pixel(2),pixel(1));
+                end
+            else
+                color = [obj.red(pixel(2),pixel(1)) obj.green(pixel(2),pixel(1)) obj.blue(pixel(2),pixel(1))];
+            end
+
+        end
+
+        %Display the image
+        %varargin can be:
+        %  no input for all channels
+        %  'r' or 'red' for red channel
+        %  'g' or 'green' for green channel
+        %  'b' or 'blue' for blue channel
+        function display(obj,varargin)
+
+            if( ~isempty(varargin) )
+                switch (varargin{1})
+                    case {'r','red'}
+                        image(obj.red)
+                    case {'g','green'}
+                        image(obj.green)
+                    case {'b','blue'}
+                        image(obj.blue)
+                end
+
+                colormap bone;
+            else
+                bitmap = cat(3,obj.red,obj.green,obj.blue);
+                image(bitmap);
+            end
+        end
+
+        %Overload several commonly used display functions
+        function disp(obj,varargin)
+            display(obj,varargin{:});
+        end
+
+        function plot(obj,varargin)
+            display(obj,varargin{:});
+        end
+
+        function image(obj,varargin)
+            display(obj,varargin{:});
+        end
+
+        %Saves the image
+        function save(obj)
+
+            %Open file dialogue
+            [fileName,pathName,success] = uiputfile({'*.bmp','Bitmap Image (*.bmp)'},'Save Bitmap As');
+
+            if( not(success == 0) )
+                imwrite(cat(3,obj.red,obj.green,obj.blue),[pathName fileName],'bmp'); %Write image file to disk
+                disp('Save Complete');
+            end
+        end
+
+        %Opens an image and overwrites what is currently stored
+        function success = open(obj)
+
+            %Open file dialogue
+            [fileName,pathName,success] = uigetfile({'*.bmp','Bitmap Image (*.bmp)'},'Open Bitmap ');
+
+            if( not(success == 0) )
+
+                channels = imread([pathName fileName], 'bmp'); %returns color indexed data
+
+                %Store each channel
+                obj.red   = channels(:,:,1);
+                obj.green = channels(:,:,2);
+                obj.blue  = channels(:,:,3);
+
+                assignin('caller',inputname(1),obj); %saves the changes to the object
+                success = true;
+                return
+            else
+                success = false;
+                return
+            end
+        end
+
+
+    end %methods
+end %classdef

Task/Bitmap/MATLAB/bitmap-2.m

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+>> img = Bitmap(20,30);
+>> img.fill([30 30 150]);
+>> img.setPixel([10 15],[20 130 66]);
+>> disp(img)
+>> img.getPixel([10 15])
+
+ans =
+
+   20  130   66
+
+>> img.getPixel([10 15],'red')
+
+ans =
+
+   20
+
+>> img.save()
+Save Complete