EEEB0765 Digital Signal Processing for Embedded Systems 8 Video and Image Processing in Embedded Systems (I) Assoc. Prof. Dr. Peerapol Yuvapoositanon.

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Presentation transcript:

EEEB0765 Digital Signal Processing for Embedded Systems 8 Video and Image Processing in Embedded Systems (I) Assoc. Prof. Dr. Peerapol Yuvapoositanon Dept. of Electronic Engineering EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Outline Fundamental of Video and Image Processing Morphological Operations Video Play in Simulink Hands on Simulation with Matlab and Simulink EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Mathematical Morphology Morphology is the study of the shape and form of objects. Object extraction Image filtering operations, such as removal of small objects or noise from an image Image segmentation operations, such as separating connected objects Measurement operations, such as texture analysis and shape description EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Kernel 3x3 EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Strel= Structuring Element SE = strel('arbitrary', NHOOD) creates a flat structuring element where NHOOD specifies the neighborhood. EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Strel Examples (I) SE = strel('disk', R, N) creates a flat, disk-shaped structuring element, where R specifies the radius. EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Strel Examples (II) SE = strel('diamond', R) creates a flat, diamond-shaped structuring element R specifies the distance from the structuring element origin to the points of the diamond EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Dilation and Erosion Erosion Dilation http://homepages.inf.ed.ac.uk/rbf/HIPR2/matmorph.htm EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Opening and Closing Opening Closing EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Dilating If at least one pixel in the structuring element coincides with a foreground (i.e., “1”) pixel in the image underneath, then the input pixel is set to the foreground (1) value http://homepages.inf.ed.ac.uk/rbf/HIPR2/dilate.htm EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Corner is rounded off EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Grey Scale Dilation EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Erosion If for every pixel in the structuring element, the corresponding pixel in the image underneath is a foreground pixel, then the input pixel is left as it is. If any of the corresponding pixels in the image are background, however, the input pixel is also set to background value. From http://homepages.inf.ed.ac.uk/rbf/HIPR2/erode.htm EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

hole in the middle of the image increases in size EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Grey Scale Erosion EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Erosion: Separate coins before counting EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Opening An erosion followed by a dilation using the same structuring element for both operations. From http://homepages.inf.ed.ac.uk/rbf/HIPR2/open.htm EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Opening vs. Erosion The basic effect of an opening is somewhat like erosion in that it tends to remove some of the foreground (bright) pixels from the edges of regions of foreground pixels. However it is less destructive than erosion in general. EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Opening: Separate out the circles from the lines EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Opening EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Opening: Salt Noise EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Opening: Dark Noise EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Opening: Count the Spokes using Opening EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Run the Matlab commands >> I= imread('testpat1.png'); >> imshow(I) EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Closing Closing is opening performed in reverse. Simply as a dilation followed by an erosion From http://homepages.inf.ed.ac.uk/rbf/HIPR2/close.htm EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Closing vs. Dilation Closing is similar in some ways to dilation in that it tends to enlarge the boundaries of foreground (bright) regions in an image (and shrink background color holes in such regions). But it is less destructive than dilation of the original boundary shape. EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Closing: Removing Small Holes EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Closing EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

EEEB0765 DSP fort Embedded Systems http://embedsigproc. wordpress EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Try to erase all those lines! EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Closing: Finding Skeleton EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Closing EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Dark Noise EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Salt Noise EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Mplay and implay >>implay('rhinos.avi'); % Use implay >>mplay('rhinos.avi'); % mplay will be removed in future release EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Read and Play Video File >> videoFReader = vision.VideoFileReader('viplanedeparture.avi'); >> videoPlayer = vision.VideoPlayer; >> while ~isDone(videoFReader) videoFrame = step(videoFReader); step(videoPlayer, videoFrame); end >> release(videoPlayer); >>release(videoFReader); EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

EEEB0765 DSP fort Embedded Systems http://embedsigproc. wordpress EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

>> I = imread('circuit >> I = imread('circuit.tif'); >> corners = detectFASTFeatures(I,'MinContrast',0.1); >> J = insertMarker(I,corners,'circle'); >> imshow(J); EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

EEEB0765 DSP fort Embedded Systems http://embedsigproc. wordpress EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Edge Detection and Image Overlay EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Edge Detection and Image Overlay EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

EEEB0765 DSP fort Embedded Systems http://embedsigproc. wordpress EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Edge Detection and Image Overlay + Pixel Stream HDL Model EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Tracking Cars Using Foreground Detection EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon

Tracking Cars Using Foreground Detection (result) EEEB0765 DSP fort Embedded Systems http://embedsigproc.wordpress.com/eeeb0765 Assoc. Prof. Dr. P.Yuvapoositanon