Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 31 for “"gray-scale"”.
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Double-Exposure Gray-Scale Photolithography
… UV light intensity in a process termed gray-scale photolithography. Light modulation is accomplished by diffraction through sub-resolution pixels on a photomask. The number of photoresist levels is determined by the number of different pixel sizes on the mask, which is restricted by mask …
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Digital projection photochemical etching for gray-scale semiconductor applications
… The rapidly evolving domain of 3-dimensional and gray-scale semiconductor device fabrication paves the way for a wide range of revolutionary techniques, innovative applications, and promising products. This thesis presents digital projection photochemical etching, a novel and dynamic semiconductor …
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Operator-adjustable frame rate, resolution, and gray scale tradeoff in fixed-bandwidth remote manipulator control
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1980.
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Automated stereophotogrammetry
… which represent observable features at the gray scale level. Matching is based on the correlation of the edge vectors rather than the gray scale, except at the single pixel resolution where parallax accuracy is refined by a quick gray scale correlation of small windows. A discussion of speed …
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Visualization and modeling with shape
… where the original data are in the form of a gray-scale image rather than a finite point set. We present a technique for defining a point set S based on the image, allowing us ultimately to represent and manipulate image shapes from within the calculator. We conclude with some thoughts on how …
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Image data compression using multiple bases representation
The compression of gray scale images is an interesting problem because of the large number of variations between data elements while maintaining a high degree of correlation. The goal of image data compression is to obtain the best possible image for a fixed information rate. In recent years, there …
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Three dimensional characterization of failure evolution of tin and silicon in lithium ion battery electrodes
… during delithiation. Relationships between the gray scale intensity change, volumetric expansion, and particle size were established. A correlation between gray scale intensity and volumetric expansion was also recognized allowing the determination of particles as inactive, partially active, or …
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Entropy aided RF-DNA fingerprint learning from Gabor-based images
… by 0.86% compared to the usage of the full gray-scale image at 30dB. The usage of enhanced tiles selection algorithms shows an improvement in the average classification accuracy by 25% from the original tile selection procedure at 9dB.
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Automatic image analysis methods for use with local operators
… filters, and point operators such as non-linear gray scale mapping. Some examples of automatic parameter setting are given in chapter three.
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Astronomical image manipulation in the transform domain
… edge enhancement and minimum (MIN)/maximum (MAX) gray scale intensity estimation in the DCT domain are proposed. Algebraic operations and image interpolation in the DWT domain are addressed. The superiority of new algorithms over the conventional ones is demonstrated by comparing the time …
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A New Hybrid Diffractive Photo-mask Technology
… out to be a very effective alternative for gray-scale mask technology. Since this is a pure phase only mask, it doesn't cause any scattered noise light like half-tone mask and it results in smooth desired resist profile. The benefits and limitations of hybrid diffractive photo-mask approach …
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Learning continuous models for estimating intrinsic component images
… characteristics of the scene from a single, gray-scale image of the scene. The goal of the system is to use the observed image to recover images, referred to as Intrinsic Component Images, that represent the scene's characteristics. The development of the system is focused on estimating two …
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The effect of temperature, time and hydrogen ion concentration on the colorfastness of a household dye on selected cotton fabrics
… Dye results were evaluated by the use of the Gray Scale for Color Change and the AATCC Chromatic Transference Scale. Colorfastness ratings were statistically analyzed. Major findings of the research included the following: 1. The cotton drill fabric had higher colorfastness ratings for …
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A low power video compression chip for portable applications
… scalably compressing a video stream of 8 bit gray scale, 30 frame/sec, and 128 x128 demonstration reso lution. The encoder scales up for greater resolutions at mostly linear cost. The compression is performed using wavelet filtering and a combination of zero-tree and arithmetic coding of …
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Learning from one example in machine vision by sharing probability densities
… We illustrate its application to binary images, gray-scale images, and a set of 3-D neonatal magnetic resonance brain volumes.
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Calculation of the effective atomic number for the iodine contrast agent of the varying concentrations
… agents in the blood stream via the traditional gray-scale computer tomography and searches for the new imaging modalities that would provide for better sensitivity. The topic of the energy-discriminative color CT is discussed as a potential solution and its suitability is evaluated by performing …
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Compact representations for fast nonrigid registration of medical images
… a novel method for the non-rigid registration of gray scale images. To facilitate a fast method, we create a tetrahedral representation of a displacement field that automatically adapts to both the anatomy in an image and to the displacement field. The resulting algorithm has a computational cost …
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Design and Integration of Machine Learning-Based Vision System for Automated Power Line Inspection Using a Mobile Damping Robot
… filtering techniques—such as Sobel, Scharr, and Gray-scale Variance Normalization—are compared to highlight defect patterns, followed by histogram-based feature extraction and classification into healthy or unhealthy categories using traditional supervised machine learning models, including …
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Development of root observation method by image analysis system
… root image was acquired from the digitized gray scale image by a thresholding operation. The binary root image was thinned until the roots were reduced to their basic structure. Root length was calculated from the number of pixels of the root's basic structure. This root length was divided …
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Multi-atlas segmentation in head and neck CT scans
… difference of the target and the transformed gray scale atlas image at that voxel, in addition to the distance of that voxel from the boundary of the structure. We evaluate the method on a dataset of sixteen labeled images, generating automatic segmentations for each using the other fifteen …
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