Tài liệu Image processing P3 pptx

... to the mean because the average of each image is 4.125 and the average at each pixel position over all eight images is also 4.125. 102 Image Processing: The Fundamentals It is not ergodic ... of a single image, rather than from the statistics of a whole ensemble of images. Average across images at a single position = Average over all positions on the same image / ______I ... description of images from the signal processing point of view. Why do we need the statistical description of images? In various applications, we often haveto deal with sets of images of a certain...

... Introduction Image Processing Lab is a simple tool for image processing, which includes different filtersand tools to analyze images available in the AForge.NET framework. ... image is in one of the formats, you can use the following code:Collapse// load an image System.Drawing.Bitmap image = (Bitmap) Bitmap.FromFile( fileName );// format image AForge.Imaging .Image. FormatImage( ... format image AForge.Imaging .Image. FormatImage( ref image );It is easy to apply any filter to your image: Collapse// load an image System.Drawing.Bitmap image = (Bitmap) Bitmap.FromFile( fileName...

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... Image Enhancement What is image enhancement? Image enhancement is the process by which we try to improve an image so that it looks subjectively better. We do not really know how the image ... level values, it can be treated as a probabilitydensity 144 Image Processing: The Fundamentals 1 16 . . 44 Cp 3p3 = - (P3( i,j) - P~o)~ = 0.328700 2=13=1 We see that this covariance ... frequency content of the image. Which methods of the image enhancement reason about the grey level statistics of an image? 0 Methods that manipulate the histogram of the image for the purpose...

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... Bhd.Section Summary:1. Image enhancement• Image histogram• Image contrast adjustment• Image brightness adjustment2. Image thresholding3. Image arithmeticBasic Image Processing Image Processing Using ... with Images in MATLABa) Image types and classesb) Read/write imagesc) Display images2. Basic Image Processing a) Image contrast and brightness enhancementb) Image arithmetic3. Block Processing ... Outline:1. Image enhancement• Image histogram• Image contrast adjustment• Image brightness adjustment2. Image thresholding3. Image arithmeticwww.techsource.com.my©2005 Systems Sdn. Bhd.Basic Image...

... Using FloatsProblemYou want to place an image on the left or right side, with text wrapping around the image instead of appearing above or below the image, as shown in Figure 2-33.2.21 Using ... end of the image flow. At thesecond img, the clear property pushes the image down to the first line after the previousline ends. Instead of lining up with the second p element, the image waits ... absolute,relative, or fixed:div .image { position: relative; z-index: 20; width: 13px; height: 14px; background -image: url(star.gif); background-repeat: no-repeat;}DiscussionDigital images are composed...

... elementary images in terms of which SVD expands an image? There is no specific answer to this because these elementary images are intrinsic to each image; they are its eigenimages. 38 Image Processing: ... in the reconstructed image. Image Transformations 43 Figure 2.1: The original image and its five eigenimages, each scaled to have values from 0 to 255. 44 Image Processing: The Fundamentals ... decomposition of the image is optimal in the least square error sense but the base images (eigenimages), with respect to which we ex- panded the image, are determined by the image itself. (They...

... IntroductionModerndigitaltechnologyhasmadeitpossibletomanipulatemultidimensionalsignalswithsystemsthatrangefromsimpledigitalcircuitstoadvancedparallelcomputers.Thegoalofthismanipulationcanbedividedintothreecategories:•ImageProcessing imagein→imageout•ImageAnalysis imagein→measurementsout•ImageUnderstanding imagein→high-leveldescriptionoutc1999byCRCPressLLC• ... for Image AnalysisThe“rules”forchoosingthesamplingdensitywhenthegoal isimage analysis—asopposedtoimage processing aredifferent. The fundamentaldifferenceisthat thedigitizationofobjects in animageinto ... LLCImageProcessingFundamentalsIanT.YoungDelftUniversityofTechnology,TheNetherlandsJanJ.GerbrandsDelftUniversityofTechnology,TheNetherlandsLucasJ.vanVlietDelftUniversityofTechnology,TheNetherlands51.1Introduction51.2DigitalImageDefinitionsCommonValues•CharacteristicsofImageOperations•VideoParameters51.3ToolsConvolution•PropertiesofConvolution•FourierTransforms•PropertiesofFourierTransforms•Statistics•ContourRep-resentations51.4PerceptionBrightnessSensitivity•SpatialFrequencySensitivity•ColorSensitivity•OpticalIllusions51.5ImageSamplingSamplingDensityforImageProcessing•SamplingDensityforImageAnalysis51.6NoisePhotonNoise•ThermalNoise•On-ChipElectronicNoise•KTCNoise•AmplifierNoise•QuantizationNoise51.7CamerasLinearity•Sensitivity•SNR•Shading•PixelForm•SpectralSensitivity•ShutterSpeeds(IntegrationTime)•ReadoutRate51.8DisplaysRefreshRate•Interlacing•Resolution51.9AlgorithmsHistogram-BasedOperations•Mathematics-BasedOpera-tions•Convolution-BasedOperations•SmoothingOpera-tions•Derivative-BasedOperations•Morphology-BasedOp-erations51.10TechniquesShadingCorrection•BasicEnhancementandRestorationTechniques•Segmentation51.11AcknowledgmentsReferences51.1...