imuihist.m

这是采用Matlab编写的车牌识别程序,好不好下了就知

function imuihist(varargin)
%IMUIHIST - Draw histogram of gray and rgb image
%    Member of IMUI
%    Kotaimen.C, 2002/05 - 2002/07, All Rights Reserved

if ~ischar(varargin{1})
	CX = varargin{1};
	Action = 'BuildGUI';
else
	Action = varargin{1};
end
switch Action
case 'BuildGUI'
	ud.fig = dialog( ...
		'Position',			[0 0 380 220], ...
		'Name',				'Histogram', ...
		'HandleVisibility', 'on', ...
		'WindowStyle',		'modal', ...
		'WindowButtonMotionFcn', 'imuihist(''MouseMotion'')', ...
		'Visible',			'off');
	ud.axes = axes( ...
		'Units',		'pixel', ...
		'Position',		[10 50 256 128], ...
		'Visible',		'on', ...
		'Box',			'on', ...
		'TickDir',		'out', ...
		'XLim',			[0 255], ...
		'XTick',		[0 127 255], ...
		'YTick',		[], ...
		'FontSize',		8);
	ud.pop = uicontrol(ud.fig, ...
		'Style',		'popupmenu', ...
		'Units',		'pixel', ...
		'Position',		[10 188 258 24], ...
		'BackgroundColor',	'w', ...
		'String',		'', ...
		'Callback',		'imuihist(''UpdateHistogram'')');
	ud.close = uicontrol(ud.fig, ...
		'Style',		'pushbutton', ...
		'Units',		'pixel', ...
		'Position',		[290 188 72 24], ...
		'FontWeight', 	'bold', ...
		'String',		'Close', ...
		'Callback',		'delete(gcf)');
	ud.info = uicontrol(ud.fig, ...
		'Style',		'text', ...
		'Units',		'pixel', ...
		'Position',		[10 5 256 20], ...
		'FontName',		'Courier New', ...
		'FontSize',		9, ...
		'String',		'...');
	movegui(ud.fig, 'center')

	if isrgb(CX)
		[ud.L.hdata, x] = imhist(CX, 256);
		[ud.R.hdata, x] = imhist(CX(:,:,1), 256);
		[ud.G.hdata, x] = imhist(CX(:,:,2), 256);
		[ud.B.hdata, x] = imhist(CX(:,:,3), 256);
		set(ud.pop, 'String',	...
			{'Luminance', 'Red', 'Green', 'Blue'})
	else
		[ud.L.hdata, x] = imhist(CX, 256);
		set(ud.pop, 'String',	...
			{'Luminance'}, 'Enable', 'off')
	end
	set(ud.fig, ...
		'Visible', 		'on', ...
		'UserData',		ud)
	imuihist('UpdateHistogram')
case 'UpdateHistogram'
	ud = get(gcf, 'UserData');
	if ~isempty(allchild(ud.axes))
		delete(allchild(ud.axes))
	end
	switch get(ud.pop, 'Value')
	case 1
		histdata = ud.L.hdata;
		for i = 0 :255
			line([i, i], [0.1, histdata(i + 1)], ...
				'Color',	[i i i]/255 *0.8);
		end
	case 2
		histdata = ud.R.hdata;
		for i = 0 :255
			line([i, i], [0.1, histdata(i + 1)], ...
				'Color',	[i 0 0]/255);
		end
	case 3
		histdata = ud.G.hdata;
		for i = 0 :255
			line([i, i], [0.1, histdata(i + 1)], ...
				'Color',	[0 i 0]/255);
		end
	case 4
		histdata = ud.B.hdata;
		for i = 0 :255
			line([i, i], [0.1, histdata(i + 1)], ...
				'Color',	[0 0 i]/255);
		end
	end
case 'MouseMotion'
	ud = get(gcf, 'UserData');
	temp = get(ud.axes, 'CurrentPoint');
	cpx = temp(1, 1);
	cpy = temp(1, 2);
	xlim = get(ud.axes, 'XLim');
	ylim = get(ud.axes, 'YLim');
	if all([cpx > xlim(1), cpx < xlim(2), ...
				cpy > ylim(1), cpy < ylim(2)])
		switch get(ud.pop, 'Value')
		case 1
			histdata = ud.L.hdata;
		case 2
			histdata = ud.R.hdata;
		case 3
			histdata = ud.G.hdata;
		case 4
			histdata = ud.B.hdata;
		end
		histlevel = round(cpx);
		histcount = histdata(histlevel + 1);
		set(ud.info, 'String', ...
			sprintf('Level :%d, Count : %d', ...
			histlevel, histcount));
		set(gcf, 'Pointer', 'cross')
	else
		set(gcf, 'Pointer', 'arrow')
	end
end