(MATLAB Code) ColorQuirrel
MATLAB code for project ColorQuirrel. For details and explanation, please read: ColorQuirrel
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ColorQuirrel.m
% Colorquirrel.m
% Execute this file to run ColorQuirrel
close ALL;
% Prompt and open input image file
img_source = input("Enter image path: ");
obj_image = imread(img_source);
ColorquirrelUI(obj_image);
ColorquirrelUI.m
% ColorquirrelUI.m
function varargout = ColorquirrelUI(varargin)
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name', mfilename, ...
'gui_Singleton', gui_Singleton, ...
'gui_OpeningFcn', @ColorquirrelUI_OpeningFcn, ...
'gui_OutputFcn', @ColorquirrelUI_OutputFcn, ...
'gui_LayoutFcn', [] , ...
'gui_Callback', []);
if nargin && ischar(varargin{1})
gui_State.gui_Callback = str2func(varargin{1});
end
if nargout
[varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
gui_mainfcn(gui_State, varargin{:});
end
% End initialization code - DO NOT EDIT
end
% --- Executes just before ColorquirrelUI is made visible.
function ColorquirrelUI_OpeningFcn(hObject, eventdata, handles, varargin)
handles.output = hObject;
% Get image input from input variable.
handles.obj_input = varargin{1};
handles.obj_main = handles.obj_input;
axes(handles.axes_original);
imshow(handles.obj_main);
handles.mode = '';
handles.cont_2 = 1;
handles.cont_3 = 1;
initControlUI(hObject, eventdata, handles);
initResultUI(hObject, eventdata, handles);
guidata(hObject, handles);
% Update handles structure
guidata(hObject, handles);
end
% --- Outputs from this function are returned to the command line.
function varargout = ColorquirrelUI_OutputFcn(hObject, eventdata, handles)
% varargout cell array for returning output args (see VARARGOUT);
% hObject handle to figure
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Get default command line output from handles structure
varargout{1} = handles.output;
end
% --- Executes on selection change in popupmenu_control_1.
function popupmenu_control_1_Callback(hObject, eventdata, handles)
handles = guidata(hObject);
initControlUI(hObject, eventdata, handles);
contents = cellstr(get(hObject,'String'));
handles.mode = contents{get(hObject,'Value')};
if (strcmp(handles.mode, 'RGB'))
mode_RGB(hObject, eventdata, handles);
elseif (strcmp(handles.mode, 'CMY'))
mode_CMY(hObject, eventdata, handles);
elseif (strcmp(handles.mode, 'CMYK'))
mode_CMYK(hObject, eventdata, handles);
elseif (strcmp(handles.mode, 'HSV'))
mode_HSV(hObject, eventdata, handles);
elseif (strcmp(handles.mode, 'HSV'))
mode_HSV(hObject, eventdata, handles);
elseif (strcmp(handles.mode, 'Colorpicker Basic'))
mode_ColorpickerBasic(hObject, eventdata, handles);
end
guidata(hObject, handles);
end
% --- Executes during object creation, after setting all properties.
function popupmenu_control_1_CreateFcn(hObject, eventdata, handles)
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
set(hObject,'BackgroundColor','white');
end
end
% --- Executes on button press in pushbutton_control_go.
function pushbutton_control_go_Callback(hObject, eventdata, handles)
handles = guidata(hObject);
initResultUI(hObject, eventdata, handles);
if (strcmp(handles.mode, 'RGB'))
run_RGB(hObject, eventdata, handles);
elseif (strcmp(handles.mode, 'CMY'))
run_CMY(hObject, eventdata, handles);
elseif (strcmp(handles.mode, 'CMYK'))
run_CMYK(hObject, eventdata, handles);
elseif (strcmp(handles.mode, 'HSV'))
run_HSV(hObject, eventdata, handles);
elseif (strcmp(handles.mode, 'Colorpicker Basic'))
run_ColorpickerBasic(hObject, eventdata, handles);
end
guidata(hObject, handles);
end
% --- Executes on button press in pushbotton_colorpicker_analysis.
function pushbotton_colorpicker_analysis_Callback(hObject, eventdata, handles)
%
end
% --- Executes on button press in pushbutton_colorpicker_color.
function pushbutton_colorpicker_color_Callback(hObject, eventdata, handles)
%
end
% --- Executes on selection change in popupmenu_control_2.
function popupmenu_control_2_Callback(hObject, eventdata, handles)
handles = guidata(hObject);
contents = cellstr(get(hObject,'String'));
if (strcmp(handles.mode, 'Colorpicker Basic'))
handles.cont_2 = str2num(contents{get(hObject,'Value')});
end
guidata(hObject, handles);
end
% --- Executes during object creation, after setting all properties.
function popupmenu_control_2_CreateFcn(hObject, eventdata, handles)
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
set(hObject,'BackgroundColor','white');
end
end
% --- Executes on selection change in popupmenu_control_3.
function popupmenu_control_3_Callback(hObject, eventdata, handles)
handles = guidata(hObject);
contents = cellstr(get(hObject,'String'));
chosen = contents{get(hObject,'Value')};
if (strcmp(handles.mode, 'Colorpicker Basic'))
if (strcmp(chosen, 'None'))
handles.cont_3 = 1;
elseif (strcmp(chosen, '2*2'))
handles.cont_3 = 2;
elseif (strcmp(chosen, '4*4'))
handles.cont_3 = 4;
elseif (strcmp(chosen, '5*5'))
handles.cont_3 = 5;
elseif (strcmp(chosen, '7*7'))
handles.cont_3 = 7;
elseif (strcmp(chosen, '10*10'))
handles.cont_3 = 10;
elseif (strcmp(chosen, '20*20'))
handles.cont_3 = 20;
elseif (strcmp(chosen, '100*100'))
handles.cont_3 = 100;
else
handles.cont_3 = 1;
end
end
guidata(hObject, handles);
end
% --- Executes during object creation, after setting all properties.
function popupmenu_control_3_CreateFcn(hObject, eventdata, handles)
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
set(hObject,'BackgroundColor','white');
end
end
% --- Executes on button press in button_result_space_1.
function button_result_space_1_Callback(hObject, eventdata, handles)
handles = guidata(hObject);
guidata(hObject, handles);
end
% --- Executes on button press in button_result_space_2.
function button_result_space_2_Callback(hObject, eventdata, handles)
handles = guidata(hObject);
guidata(hObject, handles);
end
% --- Executes on button press in button_result_space_3.
function button_result_space_3_Callback(hObject, eventdata, handles)
handles = guidata(hObject);
guidata(hObject, handles);
end
% --- Executes on button press in button_result_space_4.
function button_result_space_4_Callback(hObject, eventdata, handles)
handles = guidata(hObject);
guidata(hObject, handles);
end
% --- Executes on selection change in saveoption_result_space_1.
function saveoption_result_space_1_Callback(hObject, eventdata, handles)
handles = guidata(hObject);
guidata(hObject, handles);
end
% --- Executes during object creation, after setting all properties.
function saveoption_result_space_1_CreateFcn(hObject, eventdata, handles)
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
set(hObject,'BackgroundColor','white');
end
end
% --- Executes on selection change in saveoption_result_space_2.
function saveoption_result_space_2_Callback(hObject, eventdata, handles)
handles = guidata(hObject);
guidata(hObject, handles);
end
% --- Executes during object creation, after setting all properties.
function saveoption_result_space_2_CreateFcn(hObject, eventdata, handles)
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
set(hObject,'BackgroundColor','white');
end
end
% --- Executes on selection change in saveoption_result_space_3.
function saveoption_result_space_3_Callback(hObject, eventdata, handles)
handles = guidata(hObject);
guidata(hObject, handles);
end
% --- Executes during object creation, after setting all properties.
function saveoption_result_space_3_CreateFcn(hObject, eventdata, handles)
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
set(hObject,'BackgroundColor','white');
end
end
% --- Executes on selection change in saveoption_result_space_4.
function saveoption_result_space_4_Callback(hObject, eventdata, handles)
handles = guidata(hObject);
guidata(hObject, handles);
end
% --- Executes during object creation, after setting all properties.
function saveoption_result_space_4_CreateFcn(hObject, eventdata, handles)
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
set(hObject,'BackgroundColor','white');
end
end
% =============================================================
function initControlUI(hObject, eventdata, handles)
%control texts
set(handles.text_control_2, 'Visible', 'off');
set(handles.text_control_3, 'Visible', 'off');
%control popupmenus
set(handles.popupmenu_control_2, 'Visible', 'off');
set(handles.popupmenu_control_3, 'Visible', 'off');
%control button and description
set(handles.pushbutton_control_go, 'Visible', 'off');
set(handles.control_description, 'Visible', 'off');
end
function initResultUI(hObject, eventdata, handles)
%colorpicker
set(handles.text_result_colorpicker_1, 'Visible', 'off');
set(handles.text_result_colorpicker_2, 'Visible', 'off');
%savebuttons for colorpicker
set(handles.pushbotton_colorpicker_analysis, 'Visible', 'off');
set(handles.pushbutton_colorpicker_color, 'Visible', 'off');
%colorpicker results
set(handles.axes_result_colorpicker_color, 'Visible', 'off');
cla(handles.axes_result_colorpicker_color);
set(handles.axes_result_colorpicker_analysis, 'Visible', 'off');
cla(handles.axes_result_colorpicker_analysis);
%color space
set(handles.text_result_space_1, 'Visible', 'off');
set(handles.axes_result_space_1, 'Visible', 'off');
set(handles.saveoption_result_space_1, 'Visible', 'off');
set(handles.button_result_space_1, 'Visible', 'off');
cla(handles.axes_result_space_1);
set(handles.text_result_space_2, 'Visible', 'off');
set(handles.axes_result_space_2, 'Visible', 'off');
set(handles.saveoption_result_space_2, 'Visible', 'off');
set(handles.button_result_space_2, 'Visible', 'off');
cla(handles.axes_result_space_2);
set(handles.text_result_space_3, 'Visible', 'off');
set(handles.axes_result_space_3, 'Visible', 'off');
set(handles.saveoption_result_space_3, 'Visible', 'off');
set(handles.button_result_space_3, 'Visible', 'off');
cla(handles.axes_result_space_3);
set(handles.text_result_space_4, 'Visible', 'off');
set(handles.axes_result_space_4, 'Visible', 'off');
set(handles.saveoption_result_space_4, 'Visible', 'off');
set(handles.button_result_space_4, 'Visible', 'off');
cla(handles.axes_result_space_4);
end
function mode_RGB(hObject, eventdata, handles)
handles.control_description.String = 'RGB color model is an additive color model that uses Red, Green, Blue to produce visible colors. Press [Go] to continue.';
set(handles.control_description, 'Visible', 'on');
set(handles.pushbutton_control_go, 'Visible', 'on');
end
function mode_CMY(hObject, eventdata, handles)
handles.control_description.String = 'CMY color model is a subtractive color model that uses Cyan, Magenta, Yellow to produce visible colors. Press [Go] to continue.';
set(handles.control_description, 'Visible', 'on');
set(handles.pushbutton_control_go, 'Visible', 'on');
end
function mode_CMYK(hObject, eventdata, handles)
handles.control_description.String = 'CMYK color model is an extension of CMY color model, with black added. It is used on usual printers, for economic reasons - black inks are usually cheaper than other colored inks. Press [Go] to continue.';
set(handles.control_description, 'Visible', 'on');
set(handles.pushbutton_control_go, 'Visible', 'on');
end
function mode_HSV(hObject, eventdata, handles)
handles.control_description.String = 'HSV color model is a color model consisting of Hue, Saturation, and Value.';
set(handles.control_description, 'Visible', 'on');
set(handles.pushbutton_control_go, 'Visible', 'on');
end
function mode_ColorpickerBasic(hObject, eventdata, handles)
handles.control_description.String = 'Choosing the [representative] colors from the image. K-means clustering is used. [Downsampling] option is inspired by the JPEG compression. Higher downsampling gives up a bit of accuracy for performance.';
set(handles.control_description, 'Visible', 'on');
handles.text_control_2.String = '2. Number of colors to pick:';
set(handles.text_control_2, 'Visible', 'on');
handles.text_control_3.String = '3. Downsampling coefficient: ';
set(handles.text_control_3, 'Visible', 'on');
handles.popupmenu_control_2.String = {'1', '2', '3', '4', '5', '6', ...
'7', '8', '9', '10', '12', '15', '18', '20', '30', '40', '50'};
set(handles.popupmenu_control_2, 'Visible', 'on');
handles.popupmenu_control_3.String = {'None', '2*2', '4*4', '5*5', ...
'7*7', '10*10', '20*20', '100*100'};
set(handles.popupmenu_control_3, 'Visible', 'on');
set(handles.pushbutton_control_go, 'Visible', 'on');
end
function run_RGB(hObject, eventdata, handles)
obj_image = handles.obj_main;
[r, g, b] = divideSpace3(obj_image);
%color space
handles.text_result_space_1.String = "Red";
set(handles.text_result_space_1, 'Visible', 'on');
set(handles.axes_result_space_1, 'Visible', 'on');
%%%%%set(handles.button_result_space_1, 'Visible', 'on');
axes(handles.axes_result_space_1);
imshow(uint8(r));
handles.text_result_space_2.String = "Green";
set(handles.text_result_space_2, 'Visible', 'on');
set(handles.axes_result_space_2, 'Visible', 'on');
%%%%%set(handles.button_result_space_2, 'Visible', 'on');
axes(handles.axes_result_space_2);
imshow(uint8(g));
handles.text_result_space_3.String = "Blue";
set(handles.text_result_space_3, 'Visible', 'on');
set(handles.axes_result_space_3, 'Visible', 'on');
%%%set(handles.button_result_space_3, 'Visible', 'on');
axes(handles.axes_result_space_3);
imshow(uint8(b));
end
function run_CMY(hObject, eventdata, handles)
obj_ima = handles.obj_main;
cmy_ima = convertRGB2CMY(obj_ima);
[c, mag, yel] = divideSpace3(cmy_ima);
c = convertCMY2RGB(c);
mag = convertCMY2RGB(mag);
yel = convertCMY2RGB(yel);
%color space
handles.text_result_space_1.String = "Cyan";
set(handles.text_result_space_1, 'Visible', 'on');
set(handles.axes_result_space_1, 'Visible', 'on');
%%%%%set(handles.button_result_space_1, 'Visible', 'on');
axes(handles.axes_result_space_1);
%imshow(CMY2RGB(cmy_ima));
imshow(uint8(c));
handles.text_result_space_2.String = "Magenta";
set(handles.text_result_space_2, 'Visible', 'on');
set(handles.axes_result_space_2, 'Visible', 'on');
%%%set(handles.button_result_space_2, 'Visible', 'on');
axes(handles.axes_result_space_2);
imshow(uint8(mag));
handles.text_result_space_3.String = "Yellow";
set(handles.text_result_space_3, 'Visible', 'on');
set(handles.axes_result_space_3, 'Visible', 'on');
%%%set(handles.button_result_space_3, 'Visible', 'on');
axes(handles.axes_result_space_3);
imshow(uint8(yel));
end
function run_CMYK(hObject, eventdata, handles)
obj_ima = handles.obj_main;
cmy_ima = convertRGB2CMY(obj_ima);
cmyk_ima = convertCMY2CMYK(cmy_ima);
[c, m, y, k] = divideSpace4(cmyk_ima);
size(c)
c = convertCMY2RGB(c);
m = convertCMY2RGB(m);
y = convertCMY2RGB(y);
k = convertCMY2RGB(k);
%color space
handles.text_result_space_1.String = "Cyan";
set(handles.text_result_space_1, 'Visible', 'on');
set(handles.axes_result_space_1, 'Visible', 'on');
%%%%set(handles.button_result_space_1, 'Visible', 'on');
axes(handles.axes_result_space_1);
%imshow(CMY2RGB(cmy_ima));
imshow(uint8(c));
handles.text_result_space_2.String = "Magenta";
set(handles.text_result_space_2, 'Visible', 'on');
set(handles.axes_result_space_2, 'Visible', 'on');
%%set(handles.button_result_space_2, 'Visible', 'on');
axes(handles.axes_result_space_2);
imshow(uint8(m));
handles.text_result_space_3.String = "Yellow";
set(handles.text_result_space_3, 'Visible', 'on');
set(handles.axes_result_space_3, 'Visible', 'on');
%%set(handles.button_result_space_3, 'Visible', 'on');
axes(handles.axes_result_space_3);
imshow(uint8(y));
handles.text_result_space_4.String = "Black";
set(handles.text_result_space_4, 'Visible', 'on');
set(handles.axes_result_space_4, 'Visible', 'on');
set(handles.button_result_space_4, 'Visible', 'on');
axes(handles.axes_result_space_4);
imshow(uint8(k));
end
function run_HSV(hObject, eventdata, handles)
obj_ima = handles.obj_main;
hsv_ima = convertRGB2HSV(obj_ima);
% Trick to displaying HSV images.
% H: set every s and v to 0 and 1.
% S, V: map [0, 1] to [0, 255], and put it in cmyk format as all black.
[height, width, n] = size(hsv_ima);
h_trick = zeros(height, width, 3); % HSV format
s_trick = zeros(height, width, 4); % CMYK format
v_trick = zeros(height, width, 4); % CMYK format
for r = 1:height
for c = 1:width
h_trick(r, c, 1) = hsv_ima(r, c, 1);
h_trick(r, c, 2) = 0.5;
h_trick(r, c, 3) = 1;
s_trick(r, c, 4) = hsv_ima(r, c, 2)*255;
v_trick(r, c, 4) = hsv_ima(r, c, 3)*255;
end
end
h = convertHSV2RGB(h_trick);
s_temp = convertCMYK2CMY(s_trick);
s = convertCMY2RGB(s_temp);
v_temp = convertCMYK2CMY(v_trick);
v = convertCMY2RGB(v_temp);
%color space
handles.text_result_space_1.String = "Hue";
set(handles.text_result_space_1, 'Visible', 'on');
set(handles.axes_result_space_1, 'Visible', 'on');
%%%%set(handles.button_result_space_1, 'Visible', 'on');
axes(handles.axes_result_space_1);
%imshow(CMY2RGB(cmy_ima));
imshow(uint8(h));
handles.text_result_space_2.String = "Saturation";
set(handles.text_result_space_2, 'Visible', 'on');
set(handles.axes_result_space_2, 'Visible', 'on');
%%set(handles.button_result_space_2, 'Visible', 'on');
axes(handles.axes_result_space_2);
imshow(uint8(s));
handles.text_result_space_3.String = "Value";
set(handles.text_result_space_3, 'Visible', 'on');
set(handles.axes_result_space_3, 'Visible', 'on');
%%set(handles.button_result_space_3, 'Visible', 'on');
axes(handles.axes_result_space_3);
imshow(uint8(v));
end
function run_Colorpicker1(hObject, eventdata, handles)
sample_obj = downsample(handles.obj_input, handles.cont_3);
%colorpicker
set(handles.text_result_colorpicker_1, 'Visible', 'on');
set(handles.text_result_colorpicker_2, 'Visible', 'on');
%savebuttons for colorpicker
set(handles.pushbotton_colorpicker_analysis, 'Visible', 'on');
set(handles.pushbutton_colorpicker_color, 'Visible', 'on');
%colorpicker results
set(handles.axes_result_colorpicker_color, 'Visible', 'on');
set(handles.axes_result_colorpicker_analysis, 'Visible', 'on');
obj_image = handles.obj_main;
[height, width, n] = size(obj_image);
%constructing color bins......
colorBin = zeros(256, 256, 256);
for r = 1:height
for c = 1:width
colorBin(obj_image(r, c, 1)+1, obj_image(r, c, 2)+1, obj_image(r, c, 3)+1) ...
= colorBin(obj_image(r, c, 1)+1, obj_image(r, c, 2)+1, obj_image(r, c, 3)+1)+1;
end
end
[maxVal, color] = max(colorBin, [], 3, 'linear');
pal = zeros(handles.cont_2, 3);
for i = 1:handles.cont_2
pal(i, 1) = floor(color(i)/(256*3));
pal(i, 2) = floor((color(i)-(pal(i, 1)*256*3))/3);
pal(i, 3) = mod(color(i), 3)+1;
end
size(maxVal)
size(color)
size(pal)
axes(handles.axes_result_colorpicker_color);
imshow(pal);
%rgbScatterPlot(sample_obj, centers, handles.axes_result_colorpicker_analysis);
end
function run_ColorpickerBasic(hObject, eventdata, handles)
sample_obj = downsample(handles.obj_input, handles.cont_3);
%colorpicker
set(handles.text_result_colorpicker_1, 'Visible', 'on');
set(handles.text_result_colorpicker_2, 'Visible', 'on');
%savebuttons for colorpicker
%set(handles.pushbotton_colorpicker_analysis, 'Visible', 'on');
%set(handles.pushbutton_colorpicker_color, 'Visible', 'on');
%colorpicker results
set(handles.axes_result_colorpicker_color, 'Visible', 'on');
set(handles.axes_result_colorpicker_analysis, 'Visible', 'on');
[pal, centers, centered_image] = makePalette(sample_obj, handles.cont_2);
axes(handles.axes_result_colorpicker_color);
imshow(pal);
rgbScatterPlot(sample_obj, centers, handles.axes_result_colorpicker_analysis);
end
function [palette, centers, centered_image] = makePalette(obj_image, k)
[centered_image, centers] = imsegkmeans(uint8(obj_image),k);
%B = labeloverlay(obj_image, centered_image, 'Colormap', double(centers/256));
%imshow(B);
palette = zeros(k, 1, 3);
for i=1:k
palette(i, 1, 1) = centers(i, 1);
palette(i, 1, 2) = centers(i, 2);
palette(i, 1, 3) = centers(i, 3);
end
palette = uint8(palette);
end
function hsv = convertRGB2HSV(rgb)
%https://cs.stackexchange.com/questions/64549/convert-hsv-to-rgb-colors
% H [0,360]. S [0,1]. V [0,1].
[height, width, n] = size(rgb);
hsv = zeros(height, width, n);
for r = 1:height
for c = 1:width
% max = max(R, G, B). min = min(R, G, B).
max = 'R';
max_val = rgb(r, c, 1);
min = 'R';
min_val = rgb(r, c, 1);
if (rgb(r, c, 2) > max_val)
max = 'G';
max_val = rgb(r, c, 2);
elseif (rgb(r, c, 2) < min_val)
min = 'G';
min_val = rgb(r, c, 2);
end
if (rgb(r, c, 3) > max_val)
max = 'B';
max_val = rgb(r, c, 3);
elseif (rgb(r, c, 3) < min_val)
min = 'B';
min_val = rgb(r, c, 3);
end
max_val = double(max_val)/255;
min_val = double(min_val)/255;
hsv(r, c, 3) = max_val;
if (max_val == 0)
hsv(r, c, 2) = 0;
else
hsv(r, c, 2) = (double(max_val)-double(min_val))/double(max_val);
end
r_var = double(rgb(r, c, 1))/255;
g_var = double(rgb(r, c, 2))/255;
b_var = double(rgb(r, c, 3))/255;
if (max == 'R')
hsv(r, c, 1) = 60*(0 + (g_var-b_var)/(max_val-min_val));
elseif (max == 'G')
hsv(r, c, 1) = 60*(2 + (b_var-r_var)/(max_val-min_val));
else
hsv(r, c, 1) = 60*(4 + (r_var-g_var)/(max_val-min_val));
end
if (hsv(r, c, 1) < 0)
hsv(r, c, 1) = hsv(r, c, 1) + 360;
end
end
end
end
function rgb = convertHSV2RGB(hsv)
%https://www.rapidtables.com/convert/color/hsv-to-rgb.html
[height, width, n] = size(hsv);
rgb = zeros(height, width, n);
hsv = double(hsv);
for r = 1:height
for c = 1:width
c_par = hsv(r, c, 2) * hsv(r, c, 3); % C=V*S
x_par = c_par*((1 - abs(mod(floor(hsv(r, c, 1)/60), 2)-1))); % X=C*(1-|(H/60)mod2-1|)
m_par = hsv(r, c, 3)-c_par; % m = V-C
if (hsv(r, c, 1) < 60)
R_prime = c_par;
G_prime = x_par;
B_prime = 0;
elseif (hsv(r, c, 1) < 120)
R_prime = x_par;
G_prime = c_par;
B_prime = 0;
elseif (hsv(r, c, 1) < 180)
R_prime = 0;
G_prime = c_par;
B_prime = x_par;
elseif (hsv(r, c, 1) < 240)
R_prime = 0;
G_prime = x_par;
B_prime = c_par;
elseif (hsv(r, c, 1) < 300)
R_prime = x_par;
G_prime = 0;
B_prime = c_par;
else
R_prime = c_par;
G_prime = 0;
B_prime = x_par;
end
rgb(r, c, 1) = (R_prime+m_par)*255;
rgb(r, c, 2) = (G_prime+m_par)*255;
rgb(r, c, 3) = (B_prime+m_par)*255;
end
end
end
function [A, B, C] = divideSpace3(abc)
[height, width, n] = size(abc);
A = zeros(height, width, n);
B = zeros(height, width, n);
C = zeros(height, width, n);
for r = 1:height
for c = 1:width
A(r, c, 1) = abc(r, c, 1);
B(r, c, 2) = abc(r, c, 2);
C(r, c, 3) = abc(r, c, 3);
end
end
end
function [A, B, C, D] = divideSpace4(abcd)
[height, width, n] = size(abcd);
n = 3;
A = uint8(zeros(height, width, n));
B = uint8(zeros(height, width, n));
C = uint8(zeros(height, width, n));
D = uint8(zeros(height, width, n));
for r = 1:height
for c = 1:width
A(r, c, 1) = abcd(r, c, 1);
B(r, c, 2) = abcd(r, c, 2);
C(r, c, 3) = abcd(r, c, 3);
D(r, c, 1) = abcd(r, c, 4)/3;
D(r, c, 2) = abcd(r, c, 4)/3;
D(r, c, 3) = abcd(r, c, 4)/3;
end
end
end
function cmy = convertRGB2CMY(rgb)
%returns height*width*3 size matrix, each Cyan, Magenta and Yellow.
[height, width, n] = size(rgb);
cmy = zeros(height, width, n);
for r = 1:height
for c = 1:width
cmy(r, c, 1) = 255 - rgb(r, c, 1);
cmy(r, c, 2) = 255 - rgb(r, c, 2);
cmy(r, c, 3) = 255 - rgb(r, c, 3);
end
end
end
function rgb = convertCMY2RGB(cmy)
%returns height*width*3 size matrix, each Cyan, Magenta and Yellow.
[height, width, n] = size(cmy);
rgb = zeros(height, width, n);
for r = 1:height
for c = 1:width
%RGB8 = uint8(round(RGB64*255));
rgb(r, c, 1) = 255 - cmy(r, c, 1);
rgb(r, c, 2) = 255 - cmy(r, c, 2);
rgb(r, c, 3) = 255 - cmy(r, c, 3);
end
end
end
function cmyk = convertCMY2CMYK(cmy)
[height, width, n] = size(cmy);
cmyk = zeros(height, width, 4);
for r = 1:height
for c = 1:width
%cmyk(r, c, 4) = min([cmy(r, c, 1), cmy(r, c, 2), cmy(r, c, 3)])
cmyk(r, c, 4) = cmy(r, c, 1);
if (cmy(r, c, 2) < cmyk(r, c, 4))
cmyk(r, c, 4) = cmy(r, c, 2);
end
if (cmy(r, c, 3) < cmyk(r, c, 4))
cmyk(r, c, 4) = cmy(r, c, 3);
end
cmyk(r, c, 1) = cmy(r, c, 1) - cmyk(r, c, 4);
cmyk(r, c, 2) = cmy(r, c, 2) - cmyk(r, c, 4);
cmyk(r, c, 3) = cmy(r, c, 2) - cmyk(r, c, 4);
end
end
end
function cmy = convertCMYK2CMY(cmyk)
[height, width, n] = size(cmyk);
cmy = zeros(height, width, 3);
for r = 1:height
for c = 1:width
cmy(r, c, 1) = cmyk(r, c, 1) + cmyk(r, c, 4);
cmy(r, c, 2) = cmyk(r, c, 2) + cmyk(r, c, 4);
cmy(r, c, 3) = cmyk(r, c, 2) + cmyk(r, c, 4);
end
end
end
function rgbScatterPlot(obj_image, centers, place)
set(place, 'Units', 'Normalized');
axes(place);
%let's plot the colors yay!
[height, width, n] = size(obj_image);
colors = zeros(256, 256, 256);
for r = 1:height
for c = 1:width
colors(obj_image(r, c, 1)+1, obj_image(r, c, 2)+1, obj_image(r, c, 3)+1) = ...
colors(obj_image(r, c, 1)+1, obj_image(r, c, 2)+1, obj_image(r, c, 3)+1) + 1;
end
end
[a, b, c] = ind2sub(size(colors), find(colors));
scatter3(a, b, c, '.y');
hold on;
[a, b, c] = ind2sub(size(colors), find(floor(colors/10)));
scatter3(a, b, c, '.g');
hold on;
[a, b, c] = ind2sub(size(colors), find(floor(colors/100)));
scatter3(a, b, c, '.b');
hold on;
scatter3(centers(:, 1), centers(:, 2), centers(:, 3), 'or');
xlabel("Red");
ylabel("Green");
zlabel("Blue");
end
function smaller = downsample(original, k)
[height, width, n_] = size(original);
smaller = zeros(floor(height/k), floor(width/k), 3);
for i = 1:floor(height/k)-1
for j = 1:floor(width/k)-1
for n = 1:3
smaller(i, j, n) = uint8(original(i*k+floor(k/2), j*k+floor(k/2), n));
end
end
end
end
% ===============================================================
