survey of texture mapping
... After the mapping is computed and the texture is warped, the image must be resampled on the screen grid. This process is called filtering. The cheapest texture filtering method is point sampling, wherein the pixel nearest the desired sample point is used. It works relatively well on unscaled images, ...
... After the mapping is computed and the texture is warped, the image must be resampled on the screen grid. This process is called filtering. The cheapest texture filtering method is point sampling, wherein the pixel nearest the desired sample point is used. It works relatively well on unscaled images, ...
Ch 9
... A significant number of high-energy g photons escape detection by PET and SPECT scanners as a result of their interactions with surrounding tissues. The physical basis for attenuation effects derives from the interaction of g rays with atomic electrons. In Compton scattering, a g photon is deflected ...
... A significant number of high-energy g photons escape detection by PET and SPECT scanners as a result of their interactions with surrounding tissues. The physical basis for attenuation effects derives from the interaction of g rays with atomic electrons. In Compton scattering, a g photon is deflected ...
Soft Planar Shadows Using Plateaus
... Figure 4: Sheet formation. If the cones have the same radius (i.e. the vertices are at the same height above the plane), the sheet 1–2–3–4 is formed by generating points along lines perpendicular to the original edge 1–4. If the radii differ, the sheet edges 4–5–6–7 are generated at the tangent poin ...
... Figure 4: Sheet formation. If the cones have the same radius (i.e. the vertices are at the same height above the plane), the sheet 1–2–3–4 is formed by generating points along lines perpendicular to the original edge 1–4. If the radii differ, the sheet edges 4–5–6–7 are generated at the tangent poin ...
Experiment 35 BLACK AND WHITE PHOTOGRAPHY
... The Fixer: After the developing reaction is stopped, what remains is a silver image superimposed on a background of pale yellow silver bromide. This silver bromide was not reduced in the development process and it must be removed or the image will ultimately darken due to gradual reduction of the s ...
... The Fixer: After the developing reaction is stopped, what remains is a silver image superimposed on a background of pale yellow silver bromide. This silver bromide was not reduced in the development process and it must be removed or the image will ultimately darken due to gradual reduction of the s ...
740 KB PPT - GPGPU.org
... • “Hot topic” examples: shadows, level sets, fluids • Keeping computation on-card! ...
... • “Hot topic” examples: shadows, level sets, fluids • Keeping computation on-card! ...
IMAGE ACQUISITION
... An explanation of the image-processing algorithms that convert the raw CR image data into useful clinical images will be provided. The imageprocessing algorithms to be discussed include image segmentation or exposure data recognition and background removal, contrast enhancement, spatial frequency pr ...
... An explanation of the image-processing algorithms that convert the raw CR image data into useful clinical images will be provided. The imageprocessing algorithms to be discussed include image segmentation or exposure data recognition and background removal, contrast enhancement, spatial frequency pr ...
T-1000系统介绍
... 1、32—256 Gray，Support software Gamma correction。 2、Support the rules and special-shaped handle. 3、Single-port output，can support 2048 lights。 4、Off-line(SD Card) control, play back content stored in the SD card. 5、T-1000S store a maximum of 16 programs，copy multiple files to the SD card in order, af ...
... 1、32—256 Gray，Support software Gamma correction。 2、Support the rules and special-shaped handle. 3、Single-port output，can support 2048 lights。 4、Off-line(SD Card) control, play back content stored in the SD card. 5、T-1000S store a maximum of 16 programs，copy multiple files to the SD card in order, af ...
PDF
... user provides value examples for one or more visual features, something like an image with about 30% green and 40% blue with a grass-like texture in the green part. The values are not provided in English, but are provided by using visual tools to choose colors and texture. An example of this kind of ...
... user provides value examples for one or more visual features, something like an image with about 30% green and 40% blue with a grass-like texture in the green part. The values are not provided in English, but are provided by using visual tools to choose colors and texture. An example of this kind of ...
Active Shapes for Automatic 3D Modeling of Buildings
... Advances in airborne laser ranging (LIDAR) technology have made the acquisition of high resolution digital elevation models more efficient and cost effective. However, still, most of the existing methods require human interaction with the software for guidance of the semi-automatic process, and the ...
... Advances in airborne laser ranging (LIDAR) technology have made the acquisition of high resolution digital elevation models more efficient and cost effective. However, still, most of the existing methods require human interaction with the software for guidance of the semi-automatic process, and the ...
content based image retrieval
... One of the most important features that make possible the recognition of images by humans is colour. Colour is a property that depends on the reflection of light to the eye and the processing of that information in the brain. We use colour everyday to tell the difference between objects, places, and ...
... One of the most important features that make possible the recognition of images by humans is colour. Colour is a property that depends on the reflection of light to the eye and the processing of that information in the brain. We use colour everyday to tell the difference between objects, places, and ...
CNIT 131 – Week 1
... Images that require more color depth, such as photographs, can appear grainy when saved as ...
... Images that require more color depth, such as photographs, can appear grainy when saved as ...
AUTOMATIC BUILDIND DETECTION FROM HIGH RESOLUTION IMAGES BASED ON MULTIPLE FEATURES
... Automatic recognition and reconstruction of buildings from aerial and space images is of great practical interest for many of applications such as cartography and photo-interpretation. Building detection is the first and very difficult step in building recognition and reconstruction. It is to find b ...
... Automatic recognition and reconstruction of buildings from aerial and space images is of great practical interest for many of applications such as cartography and photo-interpretation. Building detection is the first and very difficult step in building recognition and reconstruction. It is to find b ...
Poster Image Matching by Color Scheme and Layout
... The poster database is composed of 24 major image styles where they use the same background in pair, and for each style we have 4 color variations and 2 layout variations. This results in 24 x 4 x 2 = 192 images. This database is challenging since there are several similar features between posters. ...
... The poster database is composed of 24 major image styles where they use the same background in pair, and for each style we have 4 color variations and 2 layout variations. This results in 24 x 4 x 2 = 192 images. This database is challenging since there are several similar features between posters. ...
Automatic Segmentation and Indexing in a Database of Bird Images
... images of birds, a query showing a bird flying against a blue sky should be able to retrieve images of the same or similar birds sitting on a branch, flying against a cloudy sky etc. Instead, current image retrieval methods which are based on low-level image featues like color and texture derived fr ...
... images of birds, a query showing a bird flying against a blue sky should be able to retrieve images of the same or similar birds sitting on a branch, flying against a cloudy sky etc. Instead, current image retrieval methods which are based on low-level image featues like color and texture derived fr ...
Eye detection using color cues and projection functions S. A.
... split). Using horizontal projections. each of these low intensity pairs are segregated into analysis windows as shown in Fig. 7. In each of these analysis windows, vertical projections are used to divide the window into two parts, each consisting of a low intensity area. In the case of the actual ey ...
... split). Using horizontal projections. each of these low intensity pairs are segregated into analysis windows as shown in Fig. 7. In each of these analysis windows, vertical projections are used to divide the window into two parts, each consisting of a low intensity area. In the case of the actual ey ...
Computerized Medical Imaging and Graphics Acquisition
... threshold. This method enables artifact correction only if motion occurs before the contrast agent arrives at the vessels of interest. These solutions have not become widely accepted in clinical environments, mainly because of their limited applicability or requirement for special materials and equi ...
... threshold. This method enables artifact correction only if motion occurs before the contrast agent arrives at the vessels of interest. These solutions have not become widely accepted in clinical environments, mainly because of their limited applicability or requirement for special materials and equi ...
A NOVEL TECHNIQUE TO IMPROVE THE RESOLUTION
... Nuclear medicine imaging has broad applications in medicine. It is useful for evaluating abnormal anatomy and function of many of the body’s organs, detecting occult tumors or infections, detecting vascular abnormalities such as aneurysms and abnormal blood flow to various tissues. There are two br ...
... Nuclear medicine imaging has broad applications in medicine. It is useful for evaluating abnormal anatomy and function of many of the body’s organs, detecting occult tumors or infections, detecting vascular abnormalities such as aneurysms and abnormal blood flow to various tissues. There are two br ...
MEDICAL PHYSICS INTERNATIONAL
... (in which learning occurs) and the clinical environment (in which the knowledge needs to be applied). It is just not practical or efficient with respect to the cost of human effort and facilities to conduct most physics teaching directly in the clinic. D .Visualizing the Invisible The higher levels ...
... (in which learning occurs) and the clinical environment (in which the knowledge needs to be applied). It is just not practical or efficient with respect to the cost of human effort and facilities to conduct most physics teaching directly in the clinic. D .Visualizing the Invisible The higher levels ...
Spatial anti-aliasing
In digital signal processing, spatial anti-aliasing is the technique of minimizing the distortion artifacts known as aliasing when representing a high-resolution image at a lower resolution. Anti-aliasing is used in digital photography, computer graphics, digital audio, and many other applications.Anti-aliasing means removing signal components that have a higher frequency than is able to be properly resolved by the recording (or sampling) device. This removal is done before (re)sampling at a lower resolution. When sampling is performed without removing this part of the signal, it causes undesirable artifacts such as the black-and-white noise near the top of figure 1-a below.In signal acquisition and audio, anti-aliasing is often done using an analog anti-aliasing filter to remove the out-of-band component of the input signal prior to sampling with an analog-to-digital converter. In digital photography, optical anti-aliasing filters are made of birefringent materials, and smooth the signal in the spatial optical domain. The anti-aliasing filter essentially blurs the image slightly in order to reduce the resolution to or below that achievable by the digital sensor (the larger the pixel pitch, the lower the achievable resolution at the sensor level).