彩色图像处理MATLAB函数简介.ppt

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1、彩色图像处理函数简介1函数简介applycform-Applydevice-independentcolorspacetransformation.hsv2rgb-ConvertHSVvaluestoRGBcolorspace(MATLABToolbox).iccread-ReadICCcolorprofile.lab2double-ConvertLabcolorvaluestodouble.lab2uint16-ConvertLabcolorvaluestouint16.lab2uint8-ConvertLabcolorvaluestouin

2、t8.makecform-Createdevice-independentcolorspacetransformstructure.ntsc2rgb-ConvertNTSCvaluestoRGBcolorspace.1函数简介rgb2hsv-ConvertRGBvaluestoHSVcolorspace(MATLABToolbox).rgb2ntsc-ConvertRGBvaluestoNTSCcolorspace.rgb2ycbcr-ConvertRGBvaluestoYCBCRcolorspace.whitepoint-ReturnsXYZ

3、valuesofstandardilluminants.xyz2double-ConvertXYZcolorvaluestodouble.xyz2uint16-ConvertXYZcolorvaluestouint16.ycbcr2rgb-ConvertYCBCRvaluestoRGBcolorspace.1函数简介dither-Convertimageusingdithering.gray2ind-Convertintensityimagetoindexedimage.grayslice-Createindexedimagefrominten

4、sityimagebythresholding.graythresh-ComputeglobalimagethresholdusingOtsu'smethod.im2bw-Convertimagetobinaryimagebythresholding.im2double-Convertimagearraytodoubleprecision.1函数简介ind2gray-Convertindexedimagetointensityimage.ind2rgb-ConvertindexedimagetoRGBimage(MATLABToolbox).m

5、at2gray-Convertmatrixtointensityimage.rgb2gray-ConvertRGBimageorcolormaptograyscale.rgb2ind-ConvertRGBimagetoindexedimage.2颜色空间转换矩阵的创建与应用makecformCreateacolortransformationstructureSyntaxC=makecform(type)createsthecolortransformationstructureCthatdefinesthecolorspaceconversi

6、onspecifiedbytype.Toperformthetransformation,passthecolortransformationstructureasanargumenttotheapplycformfunction.‘type’参数‘type’参数颜色空间应用rgb=imread('peppers.png');cform=makecform('srgb2lab');lab=applycform(rgb,cform);3颜色空间转换函数举例rgb2hsvConvertRGBcolormaptoHSVcolormapcmap=rgb

7、2hsv(M)DescriptionconvertsanRGBcolormapMtoanHSVcolormapcmap.Bothcolormapsarem-by-3matrices.Theelementsofbothcolormapsareintherange0to1.ThecolumnsoftheinputmatrixMrepresentintensitiesofred,green,andblue,respectively.Thecolumnsoftheoutputmatrixcmaprepresenthue,saturation,andva

8、lue,respectively.3颜色空间转换函数举例hsv2rgbConvertHSVcolormaptoRGBcolormapM=hsv2rgb