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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 16 of 16 for “"halftone"”.
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Determining Optimal Halftone Angles for CMYK Printing
CMYK halftone prints are all around us, yet the halftone angles used to generate these prints are traditionally set to specific values without substantial documentation explaining why these angles are optimal. Investigating the optimization of these angles is important for enhancing print quality …
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An investigation into the coding of halftone pictures
Thesis (Sc.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1982.
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Analysis and Reduction of Moire Patterns in Scanned Halftone Pictures
… the formation of a moire pattern in a sampled halftone image. We explore techniques for restoring a sampled halftone image with a moire pattern and techniques for preventing a moire pattern when a halftone picture is scanned. Specifically, we study the frequency, phase, and spatial geometry of …
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Clustered-dot periodic halftone screen design and ICC profile color table compression
… includes two parts: clustered-dot periodic halftone screen design, and color table compression.</p> <p>Screening is a widely used halftoning method. As a consequence of the lower resolution of digital presses and printers, the number of printer-addressable dots or holes in each microcell may …
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Laser scanner jitter characterization, page content analysis for optimal rendering, and understanding image graininess
… the relationship between the continuous-space halftone image and the periodic laser scanner jitter. The simulation results show that our proposed mathematical model predicts the phenomenon of laser scanner jitter effectively, when compared to the characterization using a test pattern, which …
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Black-box printer models and their applications
… algorithm, or used to predict the printed halftone image at the input to an algorithm being used to assess print quality. In our research, we examine the potential influence of a larger neighborhood (45?45) of the digital halftone image on the measured value of a printed pixel at the center …
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Quality and compressibility analysis of checkerboard-based digital halftoning algorithms
… halftoning algorithms. The specific halftone methods of this study are those described by R.M. Case. The bi-level images are created using C/C++ implementations of these algorithms (Villarreal, 2001). Image quality is assessed using human surveys and statistical objective metrics. …
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A personal color proofing system for computer generated images
… hardcopy. It also includes a system for creating halftone dot fonts to aid in the production of high quality color proofs. A typesetter capable of producing magazine quality color images and text is an integral component of the Color Proofer. The Color Proofer is designed for photographers and …
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Estimating toner usage with laser electrophotographic printers, and object map generation from raster input image
… halftoning approach, where different halftone screens and color maps are applied to different types of objects on the page in order to improve the overall printing quality. The OMGA generates object map from the raster input directly. It solves problems such as the object map obtained …