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    Scrolling: Unlocking the Visual World of Computer Vision
    Scrolling: Unlocking the Visual World of Computer Vision
    Scrolling: Unlocking the Visual World of Computer Vision
    Ebook104 pages1 hour

    Scrolling: Unlocking the Visual World of Computer Vision

    By Fouad Sabry

    ()

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    About this ebook

    What is Scrolling


    In computer displays, filmmaking, television production, and other kinetic displays, scrolling is sliding text, images or video across a monitor or display, vertically or horizontally. "Scrolling," as such, does not change the layout of the text or pictures but moves the user's view across what is apparently a larger image that is not wholly seen. A common television and movie special effect is to scroll credits, while leaving the background stationary. Scrolling may take place completely without user intervention or, on an interactive device, be triggered by touchscreen or a keypress and continue without further intervention until a further user action, or be entirely controlled by input devices.


    How you will benefit


    (I) Insights, and validations about the following topics:


    Chapter 1: Scrolling


    Chapter 2: Scrollbar


    Chapter 3: Graphical widget


    Chapter 4: GOMS


    Chapter 5: Scroll wheel


    Chapter 6: Virtual desktop


    Chapter 7: Cursor (user interface)


    Chapter 8: Technical drawing


    Chapter 9: Multi-touch


    Chapter 10: Text entry interface


    (II) Answering the public top questions about scrolling.


    (III) Real world examples for the usage of scrolling in many fields.


    Who this book is for


    Professionals, undergraduate and graduate students, enthusiasts, hobbyists, and those who want to go beyond basic knowledge or information for any kind of Scrolling.

    LanguageEnglish
    PublisherOne Billion Knowledgeable
    Release dateMay 13, 2024
    Scrolling: Unlocking the Visual World of Computer Vision

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      Book preview

      Scrolling - Fouad Sabry

      Chapter 1: Scrolling

      The act of sliding text, images, or video over a monitor or display in either a vertical or horizontal direction is referred to as scrolling. This technique is utilized in computer displays, filmmaking, television production, and other kinetic displays. Scrolling, in and of itself, does not alter the arrangement of the text or images; rather, it shifts (pans or tilts) the user's view over what appears to be a larger image that is not seen in its entirety. There is a typical special effect used in movies and television shows that involves scrolling credits while the background remains completely still. On an interactive device, scrolling can be activated by a touchscreen or a keypress and continue without further intervention until a further user action is taken, or it can be wholly controlled by input devices. For example, in the case of film credits, scrolling can occur completely without any intervention from the user.

      It is possible to scroll in discrete increments, such as one or a few lines of text at a time, or constantly, which is referred to as smooth scrolling. The speed at which a full image is presented again is referred to as the frame rate. The fact that changes to the position of text and images can only occur as frequently as the image can be displayed again refers to the fact that it is connected to scrolling. The blurring of graphics during movement that would otherwise appear to jump is one approach that can be used to achieve smooth scrolling when frame rate is a limiting constraint.

      On a computer, scrolling is often performed by either the central processing unit (also known as software scrolling) or a graphics processor. Hardware scrolling is a function that is available on certain systems. This allows an image to be offset as it is presented without requiring any manipulation of the frame buffer (for more information, see hardware windowing). The 8-bit and 16-bit video game systems were particularly prone to this phenomenon.

      In a graphical user interface (GUI) that is designed in the WIMP manner, the user can manage the scrolling process by either using a mouse to manipulate a scrollbar or by employing keyboard shortcuts, most commonly comprising the arrow keys. Text user interfaces and command line interfaces frequently facilitate scrolling in their respective environments. This paging mode takes fewer resources than scrolling does since it allows the whole contents of the display to be altered one screenful (also known as a page) at a time rather than scrolling constantly. The page mode is frequently supported by scrolling screens as well. Most of the time, particular keys or key combinations are used to page up or down; on keyboards that are compatible with personal computers, the page up and page down buttons or the space bar are utilized. Earlier computers frequently utilized control key combinations. Certain computer mice are equipped with a scroll wheel that, when rolled, scrolls the display in a vertical direction. Other mice are equipped with scroll balls or tilt wheels, which allow for scrolling in both the vertical and horizontal directions.

      Some software allows for the use of alternative scrolling methods. There is a mode in Adobe Reader that is denoted by a little hand icon (sometimes known as a hand tool) on the document. This allows the document to be dragged by clicking on the hand icon and then dragging the mouse in a manner that is similar to sliding a large sheet of paper. Kinesthetic scrolling is the term used to describe the implementation of this capability on a touchscreen panel. Inertial scrolling is a technique that is frequently utilized in touch-screens. This technique requires the scrolling motion of an object to continue in a declining manner after the touch is released. This technique simulates the look of an object that has inertia. In the period between 1991 and 1992, Sun Microsystems' Star7 personal digital assistant (PDA) was an early example of such behavior.

      In addition to these software-dependent methods, a computer mouse can also be used to control scrolling. There are scroll wheels that can be pressed down, making them work similarly to buttons. Depending on the software, this enables scrolling in both the horizontal and vertical directions by dragging in the appropriate direction; however, when the mouse is brought back to its initial location, scrolling is stopped. There are also a few scroll wheels that can be tilted, which causes them to scroll horizontally in one direction until they are released. Scrolling is a multi-touch gesture that may be performed on touchscreen devices. It is accomplished by swiping a finger over the screen in a vertical direction in the opposite direction of the location to which the user wishes to scroll.

      Horizontal scrolling is required in order to view all of the content on a display if any of the content is too wide to fit on the display. When it comes to programs like graphics and spreadsheets, there is frequently more content than can be accommodated on the screen in either the width or the height at a scale that is comfortable. As a result, scrolling in both directions is required.

      The infinite scrolling approach was developed by Aza Raskin in 2006. This technology eliminates the need for pagination on web sites, allowing material to load constantly as the user scrolls down the page.

      Text documents that are longer than what can be displayed on the screen are frequently displayed wrapped and scaled to match the screen width. This is done in languages that are written horizontally, such as the majority of Western languages. Scrolling vertically is then used to direct attention to the material that is needed. It is possible to display lines that are too long to fit on the display without wrapping them, and in order to view each line in its entirety, you will need to scroll horizontally. On the other hand, this necessitates the cumbersome practice of scrolling line by line continuously, whereas vertical scrolling is only required after reading an entire screenful of text.

      Typically, word-wrapping is utilized by software applications like word processors and web browsers in order to display as many words in a single line as is possible within the confines of the screen or window. Alternatively, when text is organized in columns, each column is wrapped around the entire line.

      In the early days of the computer demo culture, scrolling texts, which are also known as scrolltexts or scrollers, were an essential component in the development of the culture. The software crackers frequently made use of their extensive understanding of computer platforms in order to translate the material that accompanied their releases into crack introductions. One and only purpose of these introductions was to scroll the text on the screen in a manner that was visually appealing.

      At the conclusion of movies and television shows, the credits are typically displayed while the viewer scrolls through the screen.

      In the form of a news ticker that is located at the bottom of the

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