Introduction about Digital Image processing

1. “ONE PICTURE IS WORTH MORE THAN TEN THOUSAND WORDS”
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3. INTRODUCTION
WHAT IS DIGITAL IMAGE PROCESSING?
 An image may be defined as a two –dimensional function,f(x,y)
 X and Y are spatial(plane) coordinates.
 Amplitude of f at any pair of coordinates(x,y)is called the intensity or gray
level of the image at the point.
 The field of digital image processing refers to processing digital images by
means of a digital computer.
 Digital image is composed of a finite number of elements each of which has
a particular location and value.
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4. A digital image is a representation of a two –dimensional
image as a finite set of digital values , called picture
elements or pixels.
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5. ORIGIN OF DIP
• Early 1920s: one of the first application of digital imaging was in the newspaper industry.
• The Bartlane cable picture transmission service
• Image were transferred by submarine cable between London and New York.
• Pictures were coded for cable transfer and reconstructed at the receiving end on a telegraph printer.
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7. • Improvements to the Bartlane system resulted in higher qualityimages.
• New reproduction processes based on photographic techniques.
• Increased number of tones in reproduced images.
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8. • 1960s:improvements in computing technology and the onset of the
space race led to a surge of work in digital image processing.
• 1964:computers used to improve the quality of images of the moon
taken by the range 7 probe.
• Such techniques were used in other space missions including the
apollo landings.
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9. • 1970s:Digital image processing begins to be used in medical
applications.
• 1979:Sirgodfrey N.Hounsfield & prof.Allan.M.Cormack share the
nobel prize in medicine for the invention of tomography,the
technology behind Computerised Axial Tomography(CAT) scans.
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10. • Now a days :the use of digital image processing techniques has
exploded and they are now used for all kinds of tasks in all kinds of
areas.
• Image enhancement /restoration
• Artistic effects
• Medical visualization
• Industrial inspection
• Law enforcement
• Human computer interfaces.
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13. ARTISTICS EFFECTS
• Artistics effects are used to make images more visually appealing, to
add special effects and to make composite images.
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14. MEDICAL VISUALIZATION
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15. INDUSTRIAL INSPECTION
• Human operators are expensive ,slow and unreliable.
• Make machine do the job instead
• Industrial vision system are used in all kinds of industries.
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16. LAW ENFORCEMENT
• Image processing techiques are used extensively by law enforcers.
• Number plate recoginition for speed cameras/automated toll systems
• Fingerprint recognition
• Enhancement of CCTV images.
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34. COMPONENTS OF AN IMAGE PROCESSING
SYSTEM
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