Presentation on Digital Image Processing
- 1. Welcome to our Presentation Presentation Topic: Digital Image Processing
- 2. Group Members Mohammad Salim Hosen (162-15-1044) Md. Rifat Rahman (162-15-1049) Arifur Jaman (153-15-607) Shahedul Islam Rishad (162-15-1029) Team: Dream Crushers
- 3. CONTENTS: What is Digital Image? What is digital image processing? Pixel Applications Examples of digital image processing
- 4. Digital Image: A digital image is a representation of a two-dimensional image as a finite set of digital values, called picture elements or pixels.
- 5. Digital Image Processing: Digital image processing focuses on two major tasks: Improvement of pictorial information for human interpretation. Processing of image data for storage, transmission and representation for autonomous machine perception.
- 6. Pixel: It is the smallest controllable element of an image. More pixels then more clearer the image Pixels have different intensity values
- 7. History In 1920s Submarine cables were used to transmit digitized newspaper pictures between London and New York using Bartlane systems. Specialized printing equipments were used to code the images and reproduced at receiver using telegraphic printers. Fig. Image produced using telegraphic printer
- 8. History In 1921, photographic printing press improved the resolution and tonal quality of images. Bartlane system was capable of coding 5 distinct brightness levels. It increased to 15 by 1929
- 9. History After 35 years of improvement in processing technique In 1964, Computer processing techniques were used to improve picture of moon transmitted by Ranger 7 at JPL. This was the basis of modern image processing technique.
- 10. The continuum from image processing to computer vision can be broken up into low, mid and high-level processes:
- 11. Block Diagram of a Typical Image Processing Sequence:
- 12. Components of Image Processing System
- 13. Applications: Noise filtering Content Enhancement Remote sensing
- 14. Filtering:
- 15. Image Enhancement: Contrast enhancement Deblurring
- 17. Remote Sensing:
- 18. Remote Sensing:
- 19. Examples of digital image processing: IMAGE ENHANCEMENT: One of the most common uses of DIP techniques: improve quality, remove noise etc
- 20. THE HUBBLE TELESCOPE: Launched in 1990 the Hubble telescope can take images of very distant objects However, an incorrect mirror made many of Hubble’s images useless Image processing techniques were used to fix this.
- 21. ARTISTIC EFFECTS: Artistic effects are used to make images more visually appealing, to add special effects and to make composite images.
- 22. MEDICINE: Take slice from MRI scan of canine heart, and find boundaries between types of tissue: Image with gray levels representing tissue density Use a suitable filter to highlight edges
- 23. GIS: Geographic Information Systems: Digital image processing techniques are used extensively to manipulate satellite imagery Terrain classification Meteorology
- 24. Industrial Inspection: Human operators are expensive, slow and unreliable Make machines do the job instead Industrial vision systems are used in all kinds of industries
- 25. PCB INSPECTION: Printed Circuit Board (PCB) inspection Machine inspection is used to determine that all components are present and that all solder joints are acceptable. Both conventional imaging and x-ray imaging are used.
- 26. LAW ENFORCEMENT: Number plate recognition for speed cameras/automated toll systems Fingerprint recognition Enhancement of CCTV images
- 27. HCI: Try to make human computer interfaces more natural Face recognition Gesture recognition
- 28. THANK YOU