function?shape_recognition_demo1
try
	clc;?%?Clear?the?command?window.
	close?all;?%?Close?all?figures?（except?those?of?imtool.）
	workspace;?%?Make?sure?the?workspace?panel?is?showing.
	fontSize?=?15;
	
	%?For?reference?compute?the?theoretical?circularity?of?a?bunch?of?regular?polygons
	%?with?different?number?of?sides?starting?with?3?（triangle）.
	dividingValues?=?PlotTheoreticalCircularity;
	
	%?Make?the?last?dividing?value?infinity?because?any?circularity?from?.99999?up?to?inifinity?should?be?a?circle.
	%?and?sometimes?you?have?a?circularity?more?than?1?due?to?quantization?errors.
	dividingValues（end）?=?inf;
	
	%?Now?create?a?demo?image.
	[binaryImage?numSidesCircularity]?=?CreateDemoImage（）;
	%?Count?the?number?of?shapes
	[~?numShapes]?=?bwlabel（binaryImage）;
	
	%?Display?the?polygon?demo?image.
	subplot（1?2?1）;
	imshow（binaryImage）;
	caption?=?sprintf（‘Image?with?%d?Shapes‘?numShapes）;
	title（caption?‘FontSize‘?fontSize）;
	hold?on;?%?So?that?text?labels?won‘t?blow?away?the?image.
	
	%?Set?up?figure?properties:
	%?Enlarge?figure?to?full?screen.
	set（gcf?‘Units‘?‘Normalized‘?‘OuterPosition‘?[0?0?1?1]）;
	%?Get?rid?of?tool?bar?and?pulldown?menus?that?are?along?top?of?figure.
	set（gcf?‘Toolbar‘?‘none‘?‘Menu‘?‘none‘）;
	%?Give?a?name?to?the?title?bar.
	set（gcf?‘Name‘?‘Demo?by?ImageAnalyst‘?‘Numbertitle‘?‘Off‘）
	drawnow;?%?Make?it?display?immediately.
	
	[labeledImage?numberOfobjects]?=?bwlabel（binaryImage）;
	blobMeasurements?=?regionprops（labeledImage?‘Perimeter‘?‘Area‘?‘Centroid‘?‘Image‘）;
	
	%?Now?compute?the?number?of?vertices?by?looking?at?the?number?of?peaks?in?a?plot?of?distance?from?centroid.
	numSidesDistance?=?FindNumberOfVertices（blobMeasurements?labeledImage）;
	
	%?Get?all?the?measurements?into?single?arrays?for?convenience.
	allAreas?=?[blobMeasurements.Area];
	allPerimeters?=?[blobMeasurements.Perimeter];
	circularities?=?（4?*?pi?*??allAreas）?./?allPerimeters.^2
	%?Sort?in?order?of?increasing?circularity
	[sortedCircularities?sortOrder]?=?sort（circularities?‘Ascend‘）;
	%?Sort?all?the?measurements?in?the?same?way.
	blobMeasurements?=?blobMeasurements（sortOrder）;
	allAreas?=?allAreas（sortOrder）;
	allPerimeters?=?allPerimeters（sortOrder）;
	numSidesDistance?=?numSidesDistance（sortOrder）;
	
	%?Plot?a?bar?chart?of?the?circularities.
	subplot（1?2?2）;
	bar（sortedCircularities）;
	ylim（[0.55?1.1]）;
	grid?on;
	title（‘Actual?Measured?Circularities‘?‘FontSize‘?fontSize）;
	
	%?Let‘s?compute?areas?a?different?way.??The?“Area“?returned?by?regionprops?is?a?count?of?the?number?of?pixels.
	%?This?sometimes?overestimates?the?area.??Let‘s?use?bwarea?which?computes?the?area?on?a
	%?pixel-center?to?pixel?center?basis.
	for?k?=?1?:?numberOfobjects
		thisBlob?=?blobMeasurements（k）.Image;
		allBwAreas（k）?=?bwarea（thisBlob）;
	end
	bwCircularities?=?（4?*?pi?*??allBwAreas）?./?allPerimeters.^2
	sortedCircularities?=?bwCircularities
	
	%?Put?up?red?horizontal?line

?屬性????????????大小?????日期????時間???名稱
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?????文件??????21361??2018-03-28?15:25??形狀特征提取\shape_recognition_demo1.m

?????文件??????21361??2018-03-28?15:26??形狀特征提取\shape_recognition_demo2.m

?????目錄??????????0??2018-03-28?15:53??形狀特征提取

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????????????????42722????????????????????3