Understanding Digital Imaging PDF

UNDERSTANDING DIGITAL IMAGING Com22 – Digital Imaging Ms. Rose L. Tulod DIGITAL IMAGING AN INTRODUCTION HOW IT WAS STARTED USES ON THE FIELD UNDERSTANDING ITS BASICS Starting Activity: Join at menti.com. Enter the code 7451 3471 THINK ABOUT THI...

UNDERSTANDING DIGITAL IMAGING Com22 – Digital Imaging Ms. Rose L. Tulod DIGITAL IMAGING AN INTRODUCTION HOW IT WAS STARTED USES ON THE FIELD UNDERSTANDING ITS BASICS Starting Activity: Join at menti.com. Enter the code 7451 3471 THINK ABOUT THIS: Have you ever wonder how you can make photographs more interesting and eye-catching by simply apply some post-processing effects on them? Are you amazed whenever you see a professional composition of images in posters, or four- colored magazines? In all likelihood, these manipulated images and artworks were intended to capture attention and persuade to take-or shot-certain actions.  ITS DEFINITION Digital Imaging is a broad term applied to the recording of images electronically, conversion of those images into a set of numbers, storage of those numbers in a computer, and manipulation with computer programs.  ITS DEFINITION Digital imaging is the art of making digital images – photographs, printed texts, or artwork - through the use of a digital camera or image machine, or by scanning them as a document. DIGITAL IMAGING: Digital Imaging has become more than just a popular pastime in contemporary culture. Personal computers, in addition to a plethora of hand-held electronic devices, have become the preferred mode of communication for increasingly large portions of the population.  DIGITAL IMAGING: How it was started? Joseph Nicéphore Niépce of France,, “View” from the Window at Le Gras, in 1826  DIGITAL IMAGING: How it was started? The Bartlane cable picture transmission system created the first digital image in 1920, created by British inventors Harry G. Bartholomew and Maynard D. McFarlane.  DIGITAL IMAGING: How it was started? Russell A. Kirsch created a system in 1957 that combined a drum scanner and photomultiplier tube to generate digital data that can store in a computer. For military and scientific missions, including the KH-11 program, digital imaging was developed in the 1960s and 1970s, partly to overcome the operational shortcomings of film cameras.  DIGITAL IMAGING: How it was started? Frederick G. Weighart and James F. McNulty (US radio engineer) at Automation Industries, Inc., then in El Segundo, California, co-invented the first apparatus to generate a digital image in real-time.  DIGITAL IMAGES Digital Images are electronic still images of an object or scene. Digital images can be created using an electronic camera, scanner, or other imaging device. DIGITAL IMAGING APPLICATION IN VARIOUS FIELDS Education: Teachers and students benefit from the enhanced convenience and communication that digital projectors, displays, and graphics provide to the classroom. DIGITAL IMAGING APPLICATION IN VARIOUS FIELDS Medicine: A field of digital imaging that aims to help with disease detection and treatment is rapidly expanding. DIGITAL IMAGING APPLICATION IN VARIOUS FIELDS Technology: Image sharpening and restoration is improving photographs captured by modern cameras or modifying images to obtain the desired product. This includes the zooming, blurring, sharpening, grayscale to color translation, picture recovery, and picture recognition processes. DIGITAL IMAGING APPLICATION IN VARIOUS FIELDS Agriculture, Business, Media and Communication, Military etc ??? DIGITAL IMAGING APPLICATION IN VARIOUS FIELDS DIGITAL IMAGING To grasp the concept of Digital Imaging, you must understand the terms related to it.  PIXELS IMAGE RESOLUTION DIMENSIONS FILE SIZE FILE FORMATS COMPRESSION DYNAMIC RANGE BIT DEPTHS UNDERSTANDING PIXEL UNDERSTANDING PIXEL How many pixels is a digital photo? Add a Today's computer displays subheading typically range from 1024 to 4096 pixels wide by 768 to 3072 pixels high, with 1920 x 1080 being the most common. So, when you are viewing a photo that has larger pixel dimensions than your display, if you're seeing the entire photo, it is being shrunk down PIXEL DIMENSIONS Pixel dimensions refer to the horizontal and vertical measurements of a digital image. A digital image’s pixel dimensions may be determined by multiplying the width and height by the amount of pixels-per-inch (ppi/dpi). Digital cameras have pixel dimensions expressed horizontally and vertically to help define its resolution. For scanned images, calculate the ppi/dpi by dividing a document’s dimension into the aligned pixel dimension. For example, an 8-inch by 10-inch UNDERSTANDING IMAGE RESOLUTION UNDERSTANDING IMAGE RESOLUTION The resolution of a digital image refers to the ability to see its spatial detail-essentially, how clear the image is and how much you can enlarge it without losing quality, or making it look fuzzy. The spatial frequency of a digital image is a good indicator of its resolution. Resolution is often expressed in pixels-per-inch (ppi/dpi). Digital artists can increase the sampling frequency to create sharper resolution. Each pixel can be seen by zooming in on a digital image. UNDERSTANDING IMAGE RESOLUTION PIXELS & RESOLUTION RESOLUTION = CLARITY RULING: MORE PIXELS =HIGHER RESOLUTION WORK IT OUT: Activity 1 PIXELS IMAGE RESOLUTION BIT DEPTHS DYNAMIC RANGE FILE SIZE FILE FORMATS COMPRESSION  References: https://www.recordnations.com/articles/document-imaging-tutorial/ http://preservationtutorial.library.cornell.edu/tutorial/intro/intro-01.html https://www.cambridge.org/core/books/abs/fundamentals-of-digital- imaging/introduction/3F87554D667DF8C761358BE6563BD32E