Applications of Digital X-Ray
- Medical fields. Here, X-ray machines are used to diagnose injuries and conditions on the external and internal parts of...
- Detection of foreign objects
- Product development in significant manufacturing industries
- Aerospace when inspecting the surface of the aircrafts
- Detection of flow in pipelines
- Casting and welding
What does digital imaging mean?
Digital imaging or digital image acquisition is the creation of a digital representation of the visual characteristics of an object, such as a physical scene or the interior structure of an object. The term is often assumed to imply or include the processing, compression, storage, printing and display of such images. A key advantage of a digital image, versus an analog image such as a film ...
What exactly is a digital image?
Digital Images. A digital image is a representation of a real image as a set of numbers that can be stored and handled by a digital computer.In order to translate the image into numbers, it is divided into small areas called pixels (picture elements). For each pixel, the imaging device records a number, or a small set of numbers, that describe some property of this pixel, such as its ...
What does a digital imaging technician do?
What does a digital imaging technician do? Digital imaging technicians (DITs) help the director of photography (DoP) with the digital knowhow of the camera. They advise the DoP on contrast, brightness and the effects of under or over-exposure, as these constraints are different from shooting with film.
What is digital imaging high school class?
This is a directed study of the creation of images utilizing digital and other tools for the purpose creating digital images.
What is digital imaging?
In all classes of digital imaging, the information is converted by image sensors into digital signals that are processed by a computer and made output as a visible-light image.
Why is digital imaging important?
Google is at the forefront of this ‘revolution,’ with its mission to digitize the world's books. Such digitization will make the books searchable, thus making participating libraries, such as Stanford University and the University of California Berkeley, accessible worldwide. Digital imaging also benefits the medical world because it “allows the electronic transmission of images to third-party providers, referring dentists, consultants, and insurance carriers via a modem”. The process “is also environmentally friendly since it does not require chemical processing”. Digital imaging is also frequently used to help document and record historical, scientific and personal life events.
How is digital imaging related to social media?
Digital imaging can be closely related to the social presence theory especially when referring to the social media aspect of images captured by our phones. There are many different definitions of the social presence theory but two that clearly define what it is would be "the degree to which people are perceived as real" (Gunawardena, 1995), and "the ability to project themselves socially and emotionally as real people" (Garrison, 2000). Digital imaging allows one to manifest their social life through images in order to give the sense of their presence to the virtual world. The presence of those images acts as an extension of oneself to others, giving a digital representation of what it is they are doing and who they are with. Digital imaging in the sense of cameras on phones helps facilitate this effect of presence with friends on social media. Alexander (2012) states, "presence and representation is deeply engraved into our reflections on images...this is, of course, an altered presence...nobody confuses an image with the representation reality. But we allow ourselves to be taken in by that representation, and only that 'representation' is able to show the liveliness of the absentee in a believable way." Therefore, digital imaging allows ourselves to be represented in a way so as to reflect our social presence.
How has photography changed over time?
According to the magazine article on five ways digital camera changed us states the following:The impact on professional photographers has been dramatic. Once upon a time a photographer wouldn't dare waste a shot unless they were virtually certain it would work.”The use of digital imaging ( photography) has changed the way we interacted with our environment over the years. Part of the world is experienced differently through visual imagining of lasting memories, it has become a new form of communication with friends, family and love ones around the world without face to face interactions. Through photography it is easy to see those that you have never seen before and feel their presence without them being around, for example Instagram is a form of social media where anyone is allowed to shoot, edit, and share photos of whatever they want with friends and family. Facebook, snapshot, vine and twitter are also ways people express themselves with little or no words and are able to capture every moment that is important. Lasting memories that were hard to capture, is now easy because everyone is now able to take pictures and edit it on their phones or laptops. Photography has become a new way to communicate and it is rapidly increasing as time goes by, which has affected the world around us.
How has digital imaging changed the world?
The constant advancement and production of physical equipment and hardware related to digital imaging has affected the environment surrounding the field. From cameras and webcams to printers and scanners, the hardware is becoming sleeker, thinner, faster, and cheaper. As the cost of equipment decreases, the market for new enthusiasts widens, allowing more consumers to experience the thrill of creating their own images.
What type of radiation is used to create digital images?
Digital imaging can be classified by the type of electromagnetic radiation or other waves whose variable attenuation, as they pass through or reflect off objects, conveys the information that constitutes the image.
What is digital image acquisition?
Digital imaging or digital image acquisition is the creation of a representation of the visual characteristics of an object, such as a physical scene or the interior structure of an object. The term is often assumed to imply or include the processing, compression, storage, printing, and display of such images. A key advantage of a digital image, versus an analog image such as a film photograph, is the ability to digitally make copies and copies of copies indefinitely without any loss of image quality.
What is Digital Imaging?
Digital imaging is the art of making digital images, including printed text, artwork, and photographs via a digital scanner or other imaging device. Each digital image contains a certain number of pixels or dots that are displayed on a screen.
How are digital images created?
Digital images can be created using an electronic camera, scanner, or other imaging device. The digital images created from a scanner may have originally appeared in a magazine, textbook, portfolio, journal, or other source of material. Each sampled digital image enters the computer as a grid of dots or pixels.
How are pixels stored?
Each pixel is mapped onto a grid and stored in a specific sequence onto a computer. Each pixel has its own tonal value that determines the image’s hue or color. The tonal value is represented in binary code or “bits” of information.
What is bit depth in art?
The number of tones, grayscale or color increases along with its bit depth. Digital artists may produce images in black and white, grayscale, or color. A bitonal or black and white image consists of 1 bit each, represents two tones, and uses the values 0 for black and 1 for white. Bit depth is critical for black and white imaging.
How to determine the size of a digital image?
Digital artists can determine file size by multiplying a document’s surface area to the bit depth and the ppi/dpi 2 . Divide the image file size by 8 to represent it in bytes. Multiply the pixel dimensions by each other and the bit depth to calculate the total number of bits in an image file.
What is compression in photography?
Compression refers to the act of reducing an image’s file size in order to store, process, and transmit it. The file size for images can be large enough to tax the computing and networking capabilities of various systems.
What is the bit depth of a color image?
A color image has a bit depth ranging between 8 and 24 bits of information or higher. A 24-bit color image may be divided into three categories, including 8 for red, 8 for green, and 8 for blue.
What is Digital Image?
It is the type of image which is made of pixels. It includes printed texts, photographs, and artwork. It is captured from the digital camera, any image machine. As it is made up of pixels it is used to define the quality of the image. The pixel value is used to measure the quality of the image. The binary code is used to represent the value of a pixel. The resolution can be measured by the value of pixel per inch value. For storing it in the computer there are different file formats used which are TIFF, GIF, JPEG, BMP.
Why is a JPEG not used?
The digital camera produces the digital image in the format of JPEG because the file size is smaller for JPEG format. JPEG is not used when the image is used as logos or drawings as the image is in compressed form and when it is zoomed the quality of image gets decreased.
Why is a raster image called a bitmap?
The other name of the raster image is a bitmap image. It is called a bitmap image because it is made up of billions and trillions of tiny squares known as pixels. When the bitmap image is zoomed the tiny squares can be seen in it. When it is compared with a vector the main difference is file size efficiency.
Why is raster image less usable?
This makes it less usable as the file size creates a problem to store on the computer and make it less usable. It is used to create the photographs. It is created when the photograph is taken from the digital camera. An example of a raster image is the images present on the websites.
What are the disadvantages of vector images?
One of the disadvantages is the compatibility of the vector image. When any program is used to create it is saved as the native file of that [program which makes it less compatible as the program needs to be installed in destination computer also to get access to it. An example is illustrations which are like photographs that can be made from vector image programs.
What is vector graphics?
The computer software is used for creating vector graphics. The vector image represents the wireframe type of image. The lines include in the wireframe type of image have specific node locations, node positions, curves, and lines. The lines and curves used in it can be allocated a specific color value.
What is Document Scanning?
Document scanning is exactly what it sounds like. The professional version is a streamlined, upgraded version of what you may have done at home! When a document is scanned, it is copied to a digital format. Then, it is stored on a computer folder or database. It’s much like taking a picture with a camera or smartphone.
Have Documents to Scan?
Leverage Records Management Center’s scanning experts, processes, and infrastructure to convert physical documents taking up valuable space to digital format through our document scanning and imaging center.
What is the most common technique used in radiology?
X-ray imaging ( radiography) is still the most commonly used technique in radiology. To create a radiograph, a part of the body is exposed to a very small quantity of X-rays. The X-rays pass through the tissues, striking a film or detector to create an image.
Why are X-rays used?
Also, less radiation can be used to produce an image of similar contrast to conventional radiography. X-rays can be used to image every part of the body and are used most commonly to look for fractures. They are also commonly used to examine the chest, abdomen, and superficial soft tissues. X-rays can identify many different conditions, ...
Overview
Digital imaging or digital image acquisition is the creation of a digital representation of the visual characteristics of an object, such as a physical scene or the interior structure of an object. The term is often assumed to imply or include the processing, compression, storage, printing and display of such images. A key advantage of a digital image, versus an analog image such as a film photograph, is the ability to digitally propagate copies of the original subject indefinitely without …
History
Before digital imaging, the first photograph ever produced, View from the Window at Le Gras, was in 1826 by Frenchman Joseph Nicéphore Niépce. When Joseph was 28, he was discussing with his brother Claude about the possibility of reproducing images with light. His focus on his new innovations began in 1816. He was in fact more interested in creating an engine for a boat. Joseph and his brother focused on that for quite some time and Claude successfully promoted …
Changing environment
Great strides have been made in the field of digital imaging. Negatives and exposure are foreign concepts to many, and the first digital image in 1920 led eventually to cheaper equipment, increasingly powerful yet simple software, and the growth of the Internet.
The constant advancement and production of physical equipment and hardware related to digital imaging has affected the environment surrounding the field. From cameras and webcams to pri…
Field advancements
In the field of education.
• As digital projectors, screens, and graphics find their way to the classroom, teachers and students alike are benefitting from the increased convenience and communication they provide, although their theft can be a common problem in schools. In addition acquiring a basic digital imaging education is becoming increasingly important for young professionals. Reed, a design p…
Theoretical application
Although theories are quickly becoming realities in today's technological society, the range of possibilities for digital imaging is wide open. One major application that is still in the works is that of child safety and protection. How can we use digital imaging to better protect our kids? Kodak’s program, Kids Identification Digital Software (KIDS) may answer that question. The beginnings include a digital imaging kit to be used to compile student identification photos, which would be …
Methods
A digital photograph may be created directly from a physical scene by a camera or similar device. Alternatively, a digital image may be obtained from another image in an analog medium, such as photographs, photographic film, or printed paper, by an image scanner or similar device. Many technical images—such as those acquired with tomographic equipment, side-scan sonar, or radio telescopes—are actually obtained by complex processing of non-image data. Weather radar map…
Advantages
There are several benefits of digital imaging. First, the process enables easy access of photographs and word documents. Google is at the forefront of this ‘revolution,’ with its mission to digitize the world's books. Such digitization will make the books searchable, thus making participating libraries, such as Stanford University and the University of California Berkeley, accessible worldwide. Digital imaging also benefits the medical world because it “allows the ele…
Criticisms
Critics of digital imaging cite several negative consequences. An increased “flexibility in getting better quality images to the readers” will tempt editors, photographers and journalists to manipulate photographs. In addition, “staff photographers will no longer be photojournalists, but camera operators... as editors have the power to decide what they want ‘shot’”. Legal constraints, including copyright, pose another concern: will copyright infringement occur as documents are d…
Digital Images
Resolution
- The resolution of a digital imagerefers 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 crea…
Pixel Dimensions
- Pixel dimensionsrefer 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/dpiby dividing a doc…
Bit Depth
- The number of bits defined in each pixel determines its bit depth. The number of tones, grayscale or color increases along with its bit depth. Digital artists may produce images in black and white, grayscale, or color. A bitonal or black and white image consists of 1 bit each, represents two tones, and uses the values 0 for black and 1 for white. Bit depth is critical for black and white im…
Dynamic Range
- Dynamic rangerefers to the light and dark tonal contrast of an image. The dynamic range may have an impact on the total number of potential shades produced on an image; however, it does not necessarily correlate 100 percent of the time. For example, high contrast microfilmhas a broader dynamic range but produces fewer tones. The dynamic range may also refer to a digital …
File Size
- File size is critical for digital imaging, especially for storage and file sharing. Digital artists can determine file size by multiplying a document’s surface area to the bit depth and the ppi/dpi 2 . Divide the image file size by 8 to represent it in bytes. Multiply the pixel dimensions by each other and the bit depth to calculate the total number of bits in an image file. For example, if a 24-bit im…
Compression
- Compressionrefers to the act of reducing an image’s file size in order to store, process, and transmit it. The file size for images can be large enough to tax the computing and networking capabilities of various systems. All compression techniques reduce the binary code of a regular digital image to a form based on complicated algorithms. There are two types of compression t…
File Formats
- File formatscontain bits of information that consist of the image and header. The file format tells the computer how to read and interpret the file. There are many types of file formats that vary in color capabilities, bit-depth, resolution, compression, and metadata.