12-04-2011, 02:54 PM
Presented by
Arunachalam. PL
Nagaraj.K.N
[attachment=12103]
INTRODUCTION
Image processing involves processing or altering an existing image in a desired manner.
The next step is obtaining an image in a readable format.
The Internet and other sources provide countless images in standard formats.
Image processing are of two aspects..
improving the visual appearance of images to a human viewer
preparing images for measurement of the features and structures present.
Since the digital image is “invisible” it must be prepared for viewing on one or more output device (laser printer,monitor,etc)
The digital image can be optimized for the application by enhancing or altering the appearance of structures within it (based on: body part, diagnostic task, viewing preferences,etc)
It might be possible to analyze the image in the computer and provide cues to the radiologists to help detect important/suspicious structures (e.g.: Computed Aided Diagnosis, CAD)
Scientific instruments commonly produce images to communicate results to the operator, rather than generating an audible tone or emitting a smell.
Space missions to other planets and Comet Halley always include cameras as major components, and we judge the success of those missions by the quality of the images returned.
Image-to-image transformations
Image-to-information transformations
Information-to-image transformations
Enhancement (make image more useful, pleasing)
Restoration
Egg. deblurring ,grid line removal
Geometry
(scaling, sizing , Zooming, Morphing one object to another).
Image statistics (histograms)
Histogram is the fundamental tool for analysis and image processing
Image compression
Image analysis (image segmentation, feature extraction, pattern recognition)
computer-aided detection and diagnosis (CAD)
Decompression of compressed image data.
Reconstruction of image slices from CT or MRI raw data.
Computer graphics, animations and virtual reality (synthetic objects).
The process of obtaining an high resolution (HR) image or a sequence of HR images from a set of low resolution (LR) observations.
HR techniques are being applied to a variety of fields, such as obtaining
improved still images
high definition television,
high performance color liquid crystal display (LCD) screens,
video surveillance,
remote sensing, and
medical imaging.
Conversion from RGB (the brightness of the individual red, green, and blue signals at defined wavelengths) to YIQ/YUV and to the other color encoding schemes is straightforward and loses no information.
Y, the “luminance” signal, is just the brightness of a panchromatic monochrome image that would be displayed by a black-and-white television receiver
COLOR DISPLAYS
• Most computers use color monitors that have much higher resolution than a television set but operate on essentially the same principle.
• Smaller phosphor dots, a higher frequency scan, and a single progressive scan (rather than interlace) produce much greater sharpness and color purity.
MULTIPLE IMAGES
• Multiple images may constitute a series of views of the same area, using different wavelengths of light or other signals.
• Examples include the images produced by satellites, such as
– the various visible and infrared wavelengths recorded by the Landsat Thematic Mapper™, and
– images from the Scanning Electron Microscope (SEM) in which as many as a dozen different elements may be represented by their X-ray intensities.
– These images may each require processing.
HARDWARE REQUIREMENTS
A general-purpose computer to be useful for image processing, four key demands must be met: high-resolution image display, sufficient memory transfer bandwidth, sufficient storage space, and sufficient
computing power.
A 32-bit computer can address
up to 4GB of memory(RAM).
SOFTWARE REQUIREMENTS
• Adobe Photoshop
• Corel Draw
• Serif Photoplus
Arunachalam. PL
Nagaraj.K.N
[attachment=12103]
INTRODUCTION
Image processing involves processing or altering an existing image in a desired manner.
The next step is obtaining an image in a readable format.
The Internet and other sources provide countless images in standard formats.
Image processing are of two aspects..
improving the visual appearance of images to a human viewer
preparing images for measurement of the features and structures present.
Since the digital image is “invisible” it must be prepared for viewing on one or more output device (laser printer,monitor,etc)
The digital image can be optimized for the application by enhancing or altering the appearance of structures within it (based on: body part, diagnostic task, viewing preferences,etc)
It might be possible to analyze the image in the computer and provide cues to the radiologists to help detect important/suspicious structures (e.g.: Computed Aided Diagnosis, CAD)
Scientific instruments commonly produce images to communicate results to the operator, rather than generating an audible tone or emitting a smell.
Space missions to other planets and Comet Halley always include cameras as major components, and we judge the success of those missions by the quality of the images returned.
Image-to-image transformations
Image-to-information transformations
Information-to-image transformations
Enhancement (make image more useful, pleasing)
Restoration
Egg. deblurring ,grid line removal
Geometry
(scaling, sizing , Zooming, Morphing one object to another).
Image statistics (histograms)
Histogram is the fundamental tool for analysis and image processing
Image compression
Image analysis (image segmentation, feature extraction, pattern recognition)
computer-aided detection and diagnosis (CAD)
Decompression of compressed image data.
Reconstruction of image slices from CT or MRI raw data.
Computer graphics, animations and virtual reality (synthetic objects).
The process of obtaining an high resolution (HR) image or a sequence of HR images from a set of low resolution (LR) observations.
HR techniques are being applied to a variety of fields, such as obtaining
improved still images
high definition television,
high performance color liquid crystal display (LCD) screens,
video surveillance,
remote sensing, and
medical imaging.
Conversion from RGB (the brightness of the individual red, green, and blue signals at defined wavelengths) to YIQ/YUV and to the other color encoding schemes is straightforward and loses no information.
Y, the “luminance” signal, is just the brightness of a panchromatic monochrome image that would be displayed by a black-and-white television receiver
COLOR DISPLAYS
• Most computers use color monitors that have much higher resolution than a television set but operate on essentially the same principle.
• Smaller phosphor dots, a higher frequency scan, and a single progressive scan (rather than interlace) produce much greater sharpness and color purity.
MULTIPLE IMAGES
• Multiple images may constitute a series of views of the same area, using different wavelengths of light or other signals.
• Examples include the images produced by satellites, such as
– the various visible and infrared wavelengths recorded by the Landsat Thematic Mapper™, and
– images from the Scanning Electron Microscope (SEM) in which as many as a dozen different elements may be represented by their X-ray intensities.
– These images may each require processing.
HARDWARE REQUIREMENTS
A general-purpose computer to be useful for image processing, four key demands must be met: high-resolution image display, sufficient memory transfer bandwidth, sufficient storage space, and sufficient
computing power.
A 32-bit computer can address
up to 4GB of memory(RAM).
SOFTWARE REQUIREMENTS
• Adobe Photoshop
• Corel Draw
• Serif Photoplus
