imshow不显示相同的图像
imshow不显示相同的图像
提问于 2012-10-08 22:00:11
我曾经在C语言中使用OpenCV，但现在决定给MATLAB一个机会。我是MATLAB的新手，从一开始我就遇到了一个问题：
我是这样读图片的：
X=dicomread('medicalimage.dcm') 但是当我使用imshow(X)显示图像时，显示的图像与我上传的图像不同，即使我没有对图像进行任何更改。这是什么原因呢？这两张图片之间有非常明显的对比度差异，而且，我似乎丢失了原始图片中的一些细节。
我在我的Ubuntu12.04系统上使用MATLAB R2010b。
Filename: 'x.dcm'
FileModDate: '06-Nov-2006 09:49:26'
FileSize: 526966
Format: 'DICOM'
FormatVersion: 3
Width: 512
Height: 512
BitDepth: 12
ColorType: 'grayscale'
FileMetaInformationGroupLength: 202
FileMetaInformationVersion: [2x1 uint8]
MediaStorageSOPClassUID: '1.2.840.10008.5.1.4.1.1.2'
MediaStorageSOPInstanceUID: '1.3.12.2.1107.5.1.4.54693.30000006100507010800000005302'
TransferSyntaxUID: '1.2.840.10008.1.2.1'
ImplementationClassUID: '1.3.6.1.4.1.19291.2.1'
ImplementationVersionName: 'OSIRIX001'
SourceApplicationEntityTitle: 'OSIRIX'
SpecificCharacterSet: 'ISO_IR 100'
ImageType: 'ORIGINAL\PRIMARY\AXIAL\CT_SOM5 SPI'
SOPClassUID: '1.2.840.10008.5.1.4.1.1.2'
SOPInstanceUID: '1.3.12.2.1107.5.1.4.54693.30000006100507010800000005302'
StudyDate: '20061005'
SeriesDate: '20061005'
AcquisitionDate: '20061005'
ContentDate: '20061005'
StudyTime: '101556.921000'
SeriesTime: '102051.046000'
AcquisitionTime: '101818.126639'
ContentTime: '101818.126639'
AccessionNumber: '0'
Modality: 'CT'
Manufacturer: 'SIEMENS'
InstitutionName: 'hY9'
InstitutionAddress: ''
ReferringPhysicianName: [1x1 struct]
StationName: 'CT54693'
StudyDescription: 'Extrémités inférieures^Pied_cheville_UHR (Adulte)'
ProcedureCodeSequence: [1x1 struct]
SeriesDescription: 'Pied/cheville 1.0mm std'
PerformingPhysicianName: [1x1 struct]
OperatorName: [1x1 struct]
ManufacturerModelName: 'Sensation 64'
ReferencedStudySequence: [1x1 struct]
ReferencedImageSequence: [1x1 struct]
SourceImageSequence: [1x1 struct]
PatientName: [1x1 struct]
PatientID: 'vAD7q3'
PatientBirthDate: ''
PatientSex: ''
PatientAge: '000Y'
BodyPartExamined: 'EXTREMITY'
SliceThickness: 1
KVP: 120
DataCollectionDiameter: 500
DeviceSerialNumber: '54693'
SoftwareVersion: 'syngo CT 2006A'
ProtocolName: 'Pied_cheville_UHR'
ReconstructionDiameter: 206
DistanceSourceToDetector: 1040
DistanceSourceToPatient: 570
GantryDetectorTilt: 0
TableHeight: 95
RotationDirection: 'CW'
ExposureTime: 1000
XrayTubeCurrent: 110
Exposure: 122
FilterType: '0'
GeneratorPower: 17
FocalSpot: 0.7000
DateOfLastCalibration: '20061005'
TimeOfLastCalibration: '073350.000000'
ConvolutionKernel: 'U30u'
PatientPosition: 'FFS'
StudyInstanceUID: '2.16.840.1.113669.632.20.1211.10000315526'
SeriesInstanceUID: '1.3.12.2.1107.5.1.4.54693.30000006100507010800000005268'
StudyID: 'A10025547593'
SeriesNumber: 5
AcquisitionNumber: 3
InstanceNumber: 34
ImagePositionPatient: [3x1 double]
ImageOrientationPatient: [6x1 double]
FrameOfReferenceUID: '1.3.12.2.1107.5.1.4.54693.30000006100506302075000001028'
SliceLocation: 58
ImageComments: 'JPEG 2000 lossless - Version 4.0.2 (c) Image Devices GmbH'
SamplesPerPixel: 1
PhotometricInterpretation: 'MONOCHROME2'
Rows: 512
Columns: 512
PixelSpacing: [2x1 double]
BitsAllocated: 16
BitsStored: 12
HighBit: 11
PixelRepresentation: 1
SmallestImagePixelValue: 0
LargestImagePixelValue: 2583
WindowCenter: [2x1 double]
WindowWidth: [2x1 double]
RescaleIntercept: -1024
RescaleSlope: 1
WindowCenterWidthExplanation: 'WINDOW1\WINDOW2'
RequestingService: 'Service d'orthopédie pédiatri'
RequestedProcedureDescription: 'CT pied-cheville'
RequestedProcedureCodeSequence: [1x1 struct]
RequestAttributesSequence: [1x1 struct]左边是imshow的输出，右边是原始图像：http://img23.imageshack.us/img23/3166/differencem.png?http://imageshack.us/
imshow(X,0 255)的结果：http://img248.imageshack.us/img248/4140/difference2.png?http://imageshack.us/
链接到我的DCM图像：http://www.speedyshare.com/7enTP/x.dcm.zip
Stack Overflow用户
发布于 2012-10-08 23:25:58
您是否尝试过提供documentation中提到的DICOM信息
info = dicominfo('medicalimage.dcm');
Y = dicomread(info);
figure, imshow(Y);
imcontrast;页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/12783276
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