Description This module was previously based on SIVP module and now has been re-coded to work with Scilab 6.0! ------------------------------------------------------- Updated 6-Apr-17 ------------------------------------------------------- 1. Add numbers of Feature Detection, Description and Matching functions. Example at http://scilabipcv.tritytech.com/2017/04/05/image-matching/ 2. Add object detection function 3. Add unit_tests 4. Add instructions at startup after installation for Linux Users. ------------------------------------------------------- PLEASE SCROLL DOWN TO THE "NEWS" SECTION FOR THE INSTALLATION INSTRUCTIONS ESPECIALLY FOR LINUX USER. ------------------------------------------------------- Currently the module covers following areas: IPCV - Image Processing and Computer Vision Toolbox for Scilab
Analytic Geometry plot3dot — 3-D Parametric plot for points
Filter Design and Visualization fft2pad — Pad smaller matrix with zeros to the given size before transformation. immesh — Visualize 2D matrix using mesh plot, useful for frequency response visualization. imsmoothsurf — Visualize 2D matrix using smooth surf plot, useful for frequency response visualization. imsurf — Visualize 2D matrix using surf plot, useful for frequency response visualization. mkfftfilter — Create frequency domain filter
Image Analysis and Statistics corr2 — 2D correlation coefficient edge — Find edges in a single channel image. imhist — get the histogram of an image impixel — Return selected pixel coordinates and values improfile — Return profiles for the selected 2 points mean2 — Average/mean of matrix elements std2 — Standard deviation of 2D matrix elements stdev2 — Standard deviation of 2D matrix elements
Image Arithmetic
imabsdiff — Calculate absolute difference of two images
imadd — Add two images or add a constant to an image imcomplement — Complement image imdivide — Divide two images or divide an image by an constant.
imlincomb — Linear combination of images immultiply — Multiply two images or multiply an image by an constant. imsubtract — Subtract two images or subtract a constant from an image
Image Block Processing im2col — Convert image into series of columns imblockproc — Distict block processing for an image imblockslide — Sliding block processing for an image imcolproc — Sliding block processing for an image, with vectorization 6. Image Enhancement and Restoration imadjust — Adjust the intensity of an image from given source histogram range to the destination histogram range imdeconvl2 — Deconvolution with L2 Regularization imdeconvsobolev — Deconvolution by Sobolev Regularization imdeconvwiener — Deconvolution with Wiener method imdecorrstretch — Apply decorrelation stretch to multichannel image imhistequal — Histogram Equalization iminpaint — Restores the selected region in an image using the region neighborhood immedian — Image median filter imnoise — Add noise (gaussian, etc.) to an image imwiener2 — Wiener filter for image 7. Image Linear Filtering filter2 — 2D digital filtering fspecial — Create some 2D special filters imfilter — Image filtering 8. Image Reading, Display and Exploration imdestroy — Destroy graphic window created using imdisplay (highgui). imdestroyall — Destroy ALL graphic window created using imdisplay (highgui). imdisplay — Display image using highgui for faster frame rate imread — Reads image file imshow — Display image in graphic window imwrite — Write image to file tifread — Special function to read 12-bits 1024x1024 CCD image 9. Image Registration and Image Fusion imfuse — Image fusion imgettransform — Get transformation matrix from given source and destination points imphasecorr — Detection and automatic image registration for translation, rotation and scale using phase correlation method. imtransform — Image affine transformation warpmatselect — Selecting points for image transformation 10. Image Transforms imdct — Discrete cosine transform (DCT) imhough — Image Hough transformation imhoughc — Image Hough transformation for Circle Detection imidct — Inverse discrete cosine transform (DCT) imlogpolar — Remaps an image to log-polar space. imradon — Calculates the 2D-Radon transform of the matrix 11. Image Types and Color Space Conversions hsv2rgb — Convert a HSV image to the equivalent RGB image. im2bw — Convert image to binary im2double — Convert image to double precision im2int16 — Convert image to 16-bit signed integers im2int32 — Convert image to 32-bit signed integers im2int8 — Convert image to 8-bit signed integers im2uint16 — Convert image to 16-bit unsigned integers im2uint8 — Convert image to 8-bit unsigned integers imgraythresh — Calculate Otsu's Global threshold value imnorm — Normalize input 2-D Image to the range of 0-1 for double, or 0-255 for uint8 mat2gray — Convert matrix to grayscale image ntsc2rgb — Convert a NTSC image to the equivalent RGB image. rgb2gray — Convert RGB images to gray images rgb2hsv — Convert a RGB image to the equivalent HSV image rgb2ind — Convert RGB image to index image rgb2lab — Convert from RGB color space to LAB color space rgb2ntsc — Convert a RGB image to the equivalent NTSC image YIQ. rgb2ycbcr — Convert a RGB image to the equivalent YCbCr image. xs2im — Convert graphics to an image matrix. ycbcr2rgb — Convert a YCbCr image to the equivalent RGB image. 12. Morphological Operations bwborder — Find border for an image imblackhat — Image blackhat imblobprop — Calculate blobs properties from labeled image imclose — Image closing imcreatese — Creating Structure Element for Morphological operation imdilate — Image dilation imerode — Image erosion imgradient — Image gradient imhitmiss — Image Hit-Miss imlabel — Find blobs in an image imopen — Image opening imtophat — Image tophat 13. Object Detection Coming soon 14. ROI Processing imroifill — Fill and image using the border color of the selected region imroifilt — Filtering of a selected region 15. Spatial Transformations imcrop — Crop image imcropm — Crop an image using mouse selection impyramid — Image pyramid reduction and expansion imresize — Resizes image imrotate — Rotate an image to given angle 16. Utilities and Interactive Tools im2movie — Create movie from sequence of images imaddtext — Adding text to a color image imbreakset — Set the break event with Scilab figure imbreakunset — Unset the break event with Scilab figure imcaminfo — Show the supported raw resolution for an USB camera (linux only) imdistline — Measure distance between 2 selected points in pixels. imlsusb — List all USB devices connected to PC (linux only) impixelval — Interactive tool to inspect pixel value at selected point imrects — Draw Bounding Boxes on An Image imroi — Select region of interest and create a mask from it imselect — Select points on an image. rectangle — Draw a rectangle on image 17. Video Handling addframe — Add a frame to the video file. (experimental) aviclose — Close a video file. (experimental) avicloseall — Close all opened video files/cameras. (experimental) avifile — Create a new video file to write. (experimental) avilistopened — Show all opened video files. (experimental) aviopen — Open a video file. (experimental) avireadframe — Grabs and returns a frame from a opened video file or camera (experimental) camopen — Open a camera. (experimental) camread — Grabs and returns a frame from a camera(experimental) 18. Feature Detection, Description and Matching imbestmatches — Find the best matched features from 2 features objects and the matching matrix imdetect_BRISK — Detect features from an image with BRISK algorithm imdetect_DENSE — Detect features from an image with DENSE algorithm imdetect_FAST — Detect features from an image with FAST algorithm. Usually used for corner features. imdetect_GFTT — Detect features from an image with GFTT algorithm imdetect_HARRIS — Detect features from an image with HARRIS algorithm imdetect_MSER — Detect features from an image with MSER algorithm imdetect_ORB — Detect features from an image with ORB algorithm imdetect_SIFT — Detect features from an image with SIFT algorithm imdetect_STAR — Detect features from an image with STAR algorithm imdetect_SURF — Detect features from an image with SURF algorithm imdrawmatches — Draw matching result for 2 images imextract_DescriptorBRIEF — Computes the descriptors for a set of keypoints detected in an image with BRIEF method. imextract_DescriptorBRISK — Computes the descriptors for a set of keypoints detected in an image with BRISK method. imextract_DescriptorFREAK — Computes the descriptors for a set of keypoints detected in an image with FREAK method. imextract_DescriptorORB — Computes the descriptors for a set of keypoints detected in an image with ORB method. imextract_DescriptorSIFT — Computes the descriptors for a set of keypoints detected in an image with SIFT method. imextract_DescriptorSURF — Computes the descriptors for a set of keypoints detected in an image with SURF method. immatch_BruteForce — Brute-force matcher for features matching. plotfeature — Plot the features detected by feature detectors
