IA898

Conjunto de funções utilizadas no curso IA898 - Processamento Digital de Imagens

Criado primeira vez no curso do 1º semestre 2017

Instalação

• faça o clone do repositório
• abra o jupyter e execute o notebook ia898/src/GenerateLibrary

Dependência:

- numpy
- matplotlib
- jupyter and jupyter extentions

Lessons

• chess - Illustrate the many ways to create an image of a chess like template
• iauint8pitfalls- Common errors processing uint8 data
• iagenimages - Illustrate the generation of different images
• iaprofiledemo - Illustrate the extraction and plotting of a profile
• gengaussian - Illustrate the generation of d-dimensional Gaussian image
• iait - Illustrate the contrast transform function
• iahisteq - Illustrate how to make a histogram equalization
• corrdemo - Illustrate the Template Matching technique
• iaphasecorrdemo - Illustrate the phase correlation technique
• iadftdecompose - Illustrate the decomposition of the image in primitive 2-D waves.
• iacosdemo - Illustrate discrete cosine wave and its DFT showing its periodic nature.
• iadftexamples - Demonstrate the DFT spectrum of simple synthetic images.
• iadftmatrixexamples - Demonstrate the kernel matrix for the DFT Transform.
• dftscaleproperty - Illustrate the scale property of the Discrete Fourier Transform.
• iaconvteo - Illustrate the convolution theorem
• iahotelling - Illustrate the Hotelling Transform
• iainversefiltering - Illustrate the inverse filtering for restoration.
• magnify - Illustrate the interpolation of magnified images
• iamosaicdemo - Illustrate the use of mosaic to show 3D images
• iaotsudemo - Illustrate the Otsu Thresholding Selection Method

Images

• iaimages - Images available to use in examples.
• iareadurl - Read image from URL path.

Halftoning Approximation

• iadither - Ordered Dither.
• iafloyd - Floyd-Steinberg error diffusion.

Color Processing

• iaapplylut - Intensity image transform.
• iacolormap - Create a colormap table.
• iatcrgb2ind - True color RGB to index image and colormap.
• iargb2gray - Convert True color RGB to gray image (luminance).

Geometric Manipulations

• affine - Affine transform. Supports 3D but no interpolation.
• iaffine3 - Enhanced Affine transform. Supports 3D transforms, color images and linear interpolation.
• iageorigid - 2D Rigid body geometric transformation and scaling.
• polar - Cartesian to polar coordinate transformation.
• ptrans - Periodic translation.
• iarot90 - 3D 90-degree rotation

Image Filtering

• iabwlp - Low-Pass Butterworth frequency filter.
• ialogfilter - Laplacian of Gaussian filter.
• iacontour - Contours of binary images.
• conv - 2D or 3D convolution.
• pconv - 2D or 3D periodic convolution (kernel origin at center of kernel).
• iapconv2 - 1D, 2D or 3D periodic convolution (kernel origin at array origin).
• iasobel - Sobel edge detection.
• iavarfilter - Variance filter.

Automatic Thresholding Techniques

• iaotsu - Thresholding by Otsu.

Visualization

• adshow - Basic display image in Adessowiki.
• iamosaic - Creates a mosaic of images from the input volume (3D).
• iagshow - Overlay color planes on a gray scale image ready for display.
• ialblshow - Display a labeled image assigning a random color for each label.
• ianshow - Image graphic representation useful for illustration, accepts overlay color planes.
• iaisolines - Isolines of a grayscale image.
• iadftview - Generate optical Fourier Spectrum for display from DFT data.
• iatiling - Create a large 2D image from a list of smaller images.
• iafig2img - Convert a matplotlib figure to an image ready to be displayed by adshow.
• iaplot - Simple plotting ready to be displayed adshow.
• iashow - Image display. DO NOT USE. Use adshow instead.

Image Information and Manipulation

• iaroi - Cut a rectangle out of an image.
• iacrop - Crop an image to find the minimum rectangle.
• iapad - Extend the image inserting a frame around it.
• iaimginfo - Print image size and pixel data type information
• iaind2sub - Convert linear index to double subscripts.
• meshgrid - Create two 2-D matrices of indexes.
• ianeg - Negate an image.
• normalize - Normalize the pixels values between the specified range.
• iasub2ind - Convert linear double subscripts to linear index.

Image Transformation

• iadct - Discrete Cossine Transform.
• iadctmatrix - Kernel matrix for the DCT Transform.
• iadft - Discrete Fourier Transform.
• iadftmatrix - Kernel matrix for the DFT Transform.
• iafftshift - Shifts zero-frequency component to center of spectrum.
• iaifftshift - Undoes the effects of iafftshift.
• haarmatrix - Kernel matrix for the Haar Transform.
• hadamard - Hadamard Transform.
• hadamardmatrix - Kernel matrix for the Hadamard Transform.
• iahwt - Haar Wavelet Transform.
• iaidct - Inverse Discrete Cossine Transform.
• iaidft - Inverse Discrete Fourier Transform.
• ihadamard - Inverse Hadamard Transform.
• iaihwt - Inverse Haar Wavelet Transform.
• iaisdftsym - Check for conjugate symmetry
• pca - Principal Component Analysis

Measurements

• histogram - Image histogram.
• iah2stats - Image statistics from its histogram.
• iastat - Calculates MSE, PSNR and Pearson correlation between two images.
• iacolorhist - Color-image histogram.
• iapercentile - Computes the percentile from the image.
• iah2percentile - Computes the percentile from the histogram.

Image Creation

• iacircle - Create a binary circle image.
• iaramp - Create an image with vertical bands of increasing gray values.
• iacos - Create a cosine wave image.
• iagaussian - Generate a n-dimensional Gaussian image.
• ellipse - Generate a 2D ellipse, rectangle or diamond image.
• log - Laplacian of Gaussian image.
• comb - Create a grid of impulses image.
• iarectangle - Create a binary rectangle image.
• iatext - Create a binary image of a text.

Interpolation

• iainterpolclosest - Closest pixel interpolation
• iainterpollin - Linear, bi-linear or tri-linear interpolation

Image Matching

• iacorr - Simple correlation between two images of the same size
• phaseorr - Phase correlation
• iawcorr - Weighted correlation between two images of the same size