Cleartype Sub-Pixel Text Rendering: Preference
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Optimal Filtering for Patterned Displays John C
IEEE SIGNAL PROCESSING LETTERS, VOL. 7, NO. 7, JULY 2000 179 Optimal Filtering for Patterned Displays John C. Platt Abstract—Displays with repeating patterns of colored subpixels the display. The optimal filtering chooses the to be “close” gain spatial resolution by setting individual subpixels rather than to the as measured by a perceptual error metric. by setting entire pixels. This paper describes optimal filtering The error between and is measured in a perceptu- that produces subpixel values from a high-resolution input image. The optimal filtering is based on an error metric inspired by ally relevant color space. There is evidence that the human vi- psychophysical experiments. Minimizing the error metric yields sual system separates image data into a brightness channel and a linear system of equations, which can be expressed as a set of two opponent color channels: red minus green and blue minus filters. These filters provide the same quality of font display as yellow [4]. The error in the opponent color space is standard anti-aliasing at a point size 25% smaller. This optimiza- tion forms the filter design framework for Microsoft’s ClearType. Index Terms—Anti-aliasing, ClearType, fonts, image processing, (1) liquid crystal displays, optimal filtering, patterned displays. where and are matrices that transform and into I. INTRODUCTION an opponent color space. The matrix encodes the spatial pattern of subpixel color. OR PATTERNED displays such as LCD’s, a pixel is a The error is then transformed into frequency space. The F concept, not a physical device. A patterned display con- quadratic norm of the error is measured independently at each sists of a repeating pattern of singly-colored subpixels, which frequency. -
What Resolution Should Your Images Be?
What Resolution Should Your Images Be? The best way to determine the optimum resolution is to think about the final use of your images. For publication you’ll need the highest resolution, for desktop printing lower, and for web or classroom use, lower still. The following table is a general guide; detailed explanations follow. Use Pixel Size Resolution Preferred Approx. File File Format Size Projected in class About 1024 pixels wide 102 DPI JPEG 300–600 K for a horizontal image; or 768 pixels high for a vertical one Web site About 400–600 pixels 72 DPI JPEG 20–200 K wide for a large image; 100–200 for a thumbnail image Printed in a book Multiply intended print 300 DPI EPS or TIFF 6–10 MB or art magazine size by resolution; e.g. an image to be printed as 6” W x 4” H would be 1800 x 1200 pixels. Printed on a Multiply intended print 200 DPI EPS or TIFF 2-3 MB laserwriter size by resolution; e.g. an image to be printed as 6” W x 4” H would be 1200 x 800 pixels. Digital Camera Photos Digital cameras have a range of preset resolutions which vary from camera to camera. Designation Resolution Max. Image size at Printable size on 300 DPI a color printer 4 Megapixels 2272 x 1704 pixels 7.5” x 5.7” 12” x 9” 3 Megapixels 2048 x 1536 pixels 6.8” x 5” 11” x 8.5” 2 Megapixels 1600 x 1200 pixels 5.3” x 4” 6” x 4” 1 Megapixel 1024 x 768 pixels 3.5” x 2.5” 5” x 3 If you can, you generally want to shoot larger than you need, then sharpen the image and reduce its size in Photoshop. -
Advanced Windows SIG January 17, 2002 Disk Management Note: Material for Paragraphs 1, 2,And 3 Based on Microsoft Windows XP Inside/Out Chapter 26
Advanced Windows SIG January 17, 2002 Disk Management Note: material for paragraphs 1, 2,and 3 based on Microsoft Windows XP Inside/Out Chapter 26 If you have mastered hard-disk setup utilities from Windows 98 and Me, prepare to unlearn everything you know. Windows XP offers new capabilities and a new set of tools. 1. Definitions • Disk or hard Disk Î physical disk drive installed on computer o First hard disk drive Î Disk 0 o Second hard disk drive Î Disk 1 o Third hard disk drive Î Disk 2 • Basic Disk Î Contains one or more partitions o A partition Î A portion of a disk that functions as if it were a separate disk o A primary partition Î used for starting Windows - can not be further subdivided o An extended partition Î can be further divided into one or more logical drives each of which can be formatted separately and assigned a drive letter • Volume Î When a partition or logical drive is formatted for a particular file system (FAT, FAT32, or NTFS) and assigned a drive letter, it is called a volume Disk Management rev 1.doc Page 1 of 5 1/16/2002 D R Wright 2. Windows XP Disk Management Utility • Provides tools to manage disks, partitions, volumes and logical drives • Go to Start Î Right click My Computer Î Manage Î Disk Management • Perform the following tasks: o Check size, file system, status o Create partitions, logical drives, and volumes o Assign drive letters to hard disk volumes, removable disk drives, and CD-ROM drives o Changes usually take effect immediately and without need to reboot 3. -
Seven Tips & Tricks for Windows 7
Seven Tips & Tricks For Windows 7 Tip 1: Put a “Pin Up” of the Folders You Use Most. Tip 2: Double-Up Your Windows. Tip 3: Clear, Crisp Display—It’s In Your Control. Tip 4: Order and Reason for Your Taskbar. Tip 5: Taskbar Traversing. Tip 6: BitLocker To Go Protection. Tip 7: Your Own Personal Help Desk: Windows Troubleshooting Platform. 1 Put a “Pin Up” of the Folders You Use Most . Windows® 7 allows you to “pin up” the folders you use most on your taskbar. Simply hold your mouse over the favorite folder, right click, and drag it onto the taskbar. Windows 7 automatically pins itself to the Explorer Jump List. To open the folder, right click on the Explorer icon and select the folder you want. My Favorite! Back To Top Double-Up Your Windows. When working within an application, sometimes 2 you just want more of a good thing. To open another window of the same application (assuming the app can run more than one instance), simply hold Shift and click the taskbar icon. You can also middle-click your third mouse button for the same result. Back To Top Clear, Crisp Display—It’s In Your Control. Windows 7 makes it easy for you to 3 adjust your display settings, making text and images easier to view in all the various locations where you work on your computer. Your laptop display may look fine at work but a little dark at home. Adjust the text and image settings easily with two snappy applets: ClearType Text Tuning and Display Color Calibra- tion. -
Run-Commands-Windows-10.Pdf
Run Commands Windows 10 by Bettertechtips.com Command Action Command Action documents Open Documents Folder devicepairingwizard Device Pairing Wizard videos Open Videos Folder msdt Diagnostics Troubleshooting Wizard downloads Open Downloads Folder tabcal Digitizer Calibration Tool favorites Open Favorites Folder dxdiag DirectX Diagnostic Tool recent Open Recent Folder cleanmgr Disk Cleanup pictures Open Pictures Folder dfrgui Optimie Drive devicepairingwizard Add a new Device diskmgmt.msc Disk Management winver About Windows dialog dpiscaling Display Setting hdwwiz Add Hardware Wizard dccw Display Color Calibration netplwiz User Accounts verifier Driver Verifier Manager azman.msc Authorization Manager utilman Ease of Access Center sdclt Backup and Restore rekeywiz Encryption File System Wizard fsquirt fsquirt eventvwr.msc Event Viewer calc Calculator fxscover Fax Cover Page Editor certmgr.msc Certificates sigverif File Signature Verification systempropertiesperformance Performance Options joy.cpl Game Controllers printui Printer User Interface iexpress IExpress Wizard charmap Character Map iexplore Internet Explorer cttune ClearType text Tuner inetcpl.cpl Internet Properties colorcpl Color Management iscsicpl iSCSI Initiator Configuration Tool cmd Command Prompt lpksetup Language Pack Installer comexp.msc Component Services gpedit.msc Local Group Policy Editor compmgmt.msc Computer Management secpol.msc Local Security Policy: displayswitch Connect to a Projector lusrmgr.msc Local Users and Groups control Control Panel magnify Magnifier -
Printing Terms
Printing Terms Bitmap - Also called a BMP or a raster image. A digital image that is pixel based and resolution dependent. Bit-mapped images loose sharpness and clarity when reduced or enlarged. These files are specified as a number of pixels wide by the number of pixels high. The number of bits per pixel determines the number of shades of grey or colors it can represent. Bitmaps come in many file formats, a few are GIF, JPEG, TIFF, BMP, PICT, and PSD. These types of images are created in paint programs, by scanning and by digital cameras. Bit- mapped files can also be placed or imported into a vector based file, but they remain raster images. For the promotional products industry, bit-mapped or raster images are not usually the preferred type of art for vendors to work with as they are more difficult to make adjustments such as re-sizing. CMYK - A color model where all the colors are made up of a combination of four process colors. CMYK is an abbreviation for cyan (a blue color), magenta (a red color), yellow and key (black). Color Separations - The process of separating the areas of a piece of art to be printed into its component spot or process ink colors. Each color to be printed must have its own printing plate. For example, if a piece of art was to be printed in 3 spot colors, such as PMS 185C Red, PMS 288C Blue and Black, there would be 3 plates. Each of the 3 plates would contain only the elements to be printed in a specific color. -
Guide to Digital Art Specifications
Guide to Digital Art Specifications Version 12.05.11 Image File Types Digital image formats for both Mac and PC platforms are accepted. Preferred file types: These file types work best and typically encounter few problems. tif (TIFF) jpg (JPEG) psd (Adobe Photoshop document) eps (Encapsulated PostScript) ai (Adobe Illustrator) pdf (Portable Document Format) Accepted file types: These file types are acceptable, although application versions and operating systems can introduce problems. A hardcopy, for cross-referencing, will ensure a more accurate outcome. doc, docx (Word) xls, xlsx (Excel) ppt, pptx (PowerPoint) fh (Freehand) cdr (Corel Draw) cvs (Canvas) Image sizing specifications should be discussed with the Editorial Office prior to digital file submission. Digital images should be submitted in the final size desired. White space around the image should be removed. Image Resolution The minimum acceptable resolution is 200 dpi at the desired final size in the paged article. To ensure the highest-quality published image, follow these optimum resolutions: • Line = 1200 dpi. Contains only black and white; no shades of gray. These images are typically ink drawings or charts. Other common terms used are monochrome or 1-bit. • Grayscale or Color = 300 dpi. Contains no text. A photograph or a painting is an example of this type of image. • Combination = 600 dpi. Grayscale or color image combined with a line image. An example is a photograph with letter labels, arrows, or text added outside the image area. Anytime a picture is combined with type outside the image area, the resolution must be high enough to maintain smooth, readable text. -
Resolution and LPI
Resolution and LPI Pixels: Raster graphics are made up of a grid of pixels. When viewing 100% or less on a monitor (72 dpi resolution) the individual pixels are not visible to the eye. If the dpi is lower such as in Example 1 you can see the individual pixels and can't really tell what the image is. Similar to when you zoom in on an image. Images that are only going to be viewed on the screen can be created or scanned at 72 dpi DPI or PPI: Dots per Inch or Pixels per Inch. Monitor and Scanning DPI/PPI: You will hear these terms used interchangably and in this case they refer to monitor view perimeters or the scanning resolution you select. When scanning or creating an image to be viewed on a monitor or projection device the dpi/ppi should be the same as the monitor - thus 72 dpi or a 1:1 ratio. Printer DPI/PPI: Your output device has a dpi resolution also. This is the number of dots it can create within a square inch. Example 2 shows that on a laser Example 1: Pixels Enlarged printer a number of dots can make up a halftone dot depending on the line screen selected (more about that later). When scanning or creating images that will be printed you need to capture more information about the image due to the printing process. The ratio you utilize must then be higher. But how high is enough. If your dpi is very high the file is huge. -
Is Your Monitor Set up Correctly?
Is your monitor set up correctly? There’s more to setting up a new monitor than simply taking it out of the box if you want to enjoy the best image possible. Buying a new monitor can give a new lease of life to a PC, with a bigger and brighter image, sharper text and more space in which to work. Just plugging it in and switching on won’t always give the best results, however, so it’s worth taking a little time to set it up properly so you can enjoy your new display to the full. These steps all work for laptop screens, too. Step 1: Position it property Where you put your monitor is almost as important as what model you buy. The monitor should be directly in front of you, at an arm’s length away, with the top edge of the screen at eye level when you’re sitting comfortably. You may need to adjust your chair height, or the height of the monitor, to achieve this. Less easy to resolve is where in the room a monitor sits. Ideally, it should be away from any windows to prevent reflections on the screen (a particular problem with glossy coatings) and to avoid bright light behind it. Try not to sit with a window or other source of bright light behind you, for example, or with the monitor in front of one. If you can’t move your desk to prevent this, it is possible to fit a simple shroud around a monitor to prevent reflections, and you can always close a blind or curtain. -
DNDO Statement of Intent for New National Lab Work, 22 Nov 05
70RDND18R00000001 ER BAA FY18 Exploratory Research in Preventing Nuclear and Radiological Terrorism Broad Agency Announcement No. 70RDND18R00000001 for Domestic Nuclear Detection Office (DNDO) Transformational and Applied Research Directorate (TAR) 1 70RDND18R00000001 ER BAA FY18 Table of Contents 1 Introduction ..............................................................................................................................4 1.1 Background ......................................................................................................................5 1.2 Grand Challenges & Technology Portfolios ....................................................................6 1.3 Strategic Approach...........................................................................................................8 1.4 Scope and Funding ...........................................................................................................8 2 Exploratory Research Topics ...................................................................................................9 2.1 RTA-01: Mobile Active Interrogation Using Neutrons (MAIN) ....................................9 2.2 RTA-02: Radiation Isotope Identification Device (RIID) Based on Thallium Bromide......................................................................................................................................11 2.3 RTA-03: Nuclear Detection through Centralized Data Analytics .................................14 3 Management Approach ..........................................................................................................16 -
0321722132.Pdf
Stunning CSS3: A project-based guide to the latest in CSS Zoe Mickley Gillenwater New Riders 1249 Eighth Street Berkeley, CA 94710 (510) 524-2178 Fax: (510) 524-2221 Find us on the Web at www.newriders.com To report errors, please send a note to [email protected] New Riders is an imprint of Peachpit, a division of Pearson Education Copyright © 2011 by Zoe Gillenwater Acquisitions Editor: Wendy Sharp Production Editor: Hilal Sala Project/Copy Editor: Wendy Katz Technical Editor: Chris Mills Cover design: Charlene Charles-Will Interior design: Mimi Heft, Charlene Charles-Will Compositor: Danielle Foster Indexer: Emily Glossbrenner Notice of Rights All rights reserved. No part of this book may be reproduced or transmitted in any form by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of the publisher. For information on getting permission for reprints and excerpts, contact [email protected]. Notice of Liability The information in this book is distributed on an “As Is” basis, without warranty. While every precaution has been taken in the preparation of the book, neither the author nor New Riders shall have any liability to any person or entity with respect to any loss or damage caused or alleged to be caused directly or indirectly by the instructions contained in this book or by the computer software and hardware products described in it. Trademarks Acrobat, Dreamweaver, Fireworks, and Photoshop are all trademarks or registered trade- marks of Adobe Systems, Inc. Many of the designations used by manufacturers and sellers to distinguish their products are claimed as trademarks. -
Virtual Desktop Scalability and Performance with Vmware View 5.2 and Virident Flashmax Ii Storage
VIRTUAL DESKTOP SCALABILITY AND PERFORMANCE WITH VMWARE VIEW 5.2 AND VIRIDENT FLASHMAX II STORAGE Whether you are planning to make the move to desktop virtualization or are looking to expand your existing virtual desktop infrastructure (VDI), it is important that you choose the right software and storage for your enterprise environment. It is also vital to be able to add hardware and predictably scale your environment so that you know how many users you can expect to support as your VDI needs grow. Choosing VMware View 5.2 software with a fast and reliable internal storage solution, such as Virident FlashMAX II™ storage devices, can maximize performance, reduce latency, and scale predictably as you add users. In the Principled Technologies labs, we found that a single server running VMware View 5.2 virtual desktops with two low-profile Virident FlashMAX II storage devices could support 162 virtual desktops with nearly no latency to provide an excellent experience for end users. To verify how predictably and linearly this solution scales, we had only to add another server; two servers, each with two Virident devices, scaled perfectly to support 324 users. We also ran a storage-intensive recompose job on the desktops and found that Virident FlashMAX II devices could handle heavy maintenance jobs without sacrificing end-user performance. JANUARY 2013 A PRINCIPLED TECHNOLOGIES TEST REPORT Commissioned by VMware, Inc. and Virident Systems, Inc. MANY USERS, VERY LOW LATENCY, AND PREDICTABLE SCALABILITY The success of a virtual desktop environment is dependent on the number of enterprise users your solution supports, the performance and response times it provides for your users, and the ability to predict the number of users you can expect to support when you scale your hardware.