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Scanners and digital cameras

From: Scanning Techniques for Photography, Art, and Design

Video: Scanners and digital cameras

Let's begin our discussion of scanners by comparing them with the technology that is perhaps more familiar, a digital camera. For many people scanners are these kind of mysterious black boxes that you open up, you put in your image or your document, you close it, you click the Auto button, you are not quite sure what's going to come out the other end. There is a good historical reason for this. Prior to the digital age, cameras and scanners had very different technologies, in fact the imaging product they created were very, very different. But with the development and evolution of digital imaging technology cameras and scanners really have blended right together, they really work very much the same now.

Scanners and digital cameras

Let's begin our discussion of scanners by comparing them with the technology that is perhaps more familiar, a digital camera. For many people scanners are these kind of mysterious black boxes that you open up, you put in your image or your document, you close it, you click the Auto button, you are not quite sure what's going to come out the other end. There is a good historical reason for this. Prior to the digital age, cameras and scanners had very different technologies, in fact the imaging product they created were very, very different. But with the development and evolution of digital imaging technology cameras and scanners really have blended right together, they really work very much the same now.

Both capture and digitize subjects, both create pixel-based images. Now of course there is some packaging differences between them. A digital camera, you can pretty much tell that from across the room. scanners, not so much. This is obviously kind of a scanner particularly when you open it up, but this, not sure what that is, and this, is this a scanner, is it a fax machine, is it a printer? Well lo and behold, it's all three. So there are some packaging differences between the two and there are also some differences in terms of what we use them for in terms of capturing. Typically, digital cameras we used these for capturing live 3D images, and it tend to work in a single shot, click, you take the picture all at one time.

A scanner on the other hand, we tend to use them, we are capturing more static two-dimensional objects such as documents and photographs, and there is a scanning element that moves back and forth to capture the image, so instead of taking as a single shot, like a camera, it scans back and forth, hence the name is Scanner. Now certainly there is some crossover uses, there are some cameras that are used for capturing large dimensional artwork that's two-dimensional and there is even some three-dimensional scanners, and there are even cameras that have scanning backs on them, but for most of us in the graphic arts industry and in business, we are going to be using our cameras for capturing live three-dimensional objects and scanners for flat two-dimensional ones.

Now there is also some handling differences. With a digital camera we can hold it in our hands, we can put it on the tripod, we can change the position. Scanners tend to be more static environment, which is actually a good thing. It means it's easier for us to capture images because they are flat all the time, very static. Now there are some control options differences as well. With digital cameras we control things like shutter speed and focal length, and f-stop, there is perspective changes and of course enormous lighting changes in a digital camera environment. We don't have any of those. This is a much more consistent environment when we work with a scanner.

This means that things are actually easier with a scanner in a lot of ways. And I know what you creative people are thinking. I want creative control of my artwork. Well, I promise you two things, one, we'll show you how to do plenty of creative things with your scanner, and I promise you that in the post-scan I will show you how you can capture images with your scanner and you can have your creative way with them in your digital imaging editing program such as Photoshop or Photoshop Elements. So choose your digital weapon. If you are capturing three-dimensional scene, digital camera is going to be your weapon. If you are doing more two-dimensional static art, such as a photograph, then the scanner is what you are going to be using.

It's nice to have both and to have facility to control both. On our course we are going to be focusing on two-dimensional line art graphics, photographs, and scanning and processing documents.

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This video is part of

Image for Scanning Techniques for Photography, Art, and Design
Scanning Techniques for Photography, Art, and Design

58 video lessons · 8383 viewers

Taz Tally
Author

 
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  1. 6m 48s
    1. Welcome
      1m 11s
    2. What you should know before watching this course
      3m 54s
    3. Using the exercise files
      1m 43s
  2. 1h 0m
    1. Scanners and digital cameras
      3m 6s
    2. Types of scanners
      5m 2s
    3. Scanner location
      3m 19s
    4. What scanners and digital cameras create
      7m 22s
    5. Understanding grayscale values and channels
      3m 19s
    6. Understanding pixels and vectors
      4m 1s
    7. Choosing pixels or vectors
      2m 27s
    8. Resolving resolution
      6m 32s
    9. Working with interpolation
      3m 31s
    10. Understanding the effects of compression
      2m 4s
    11. Evaluating and correcting images with histograms
      8m 26s
    12. Saving to different file formats
      7m 4s
    13. Color management
      4m 23s
  3. 33m 22s
    1. Cleaning your scanner
      7m 31s
    2. Cleaning your images
      7m 47s
    3. Calibrating your scanner
      9m 13s
    4. Creating and applying a color management profile
      8m 51s
  4. 20m 55s
    1. Evaluating your scan challenges
      9m 46s
    2. Reproducing vs. assigning colors
      6m 20s
    3. Recognizing continuous tone (contone) vs. dot pattern images
      4m 49s
  5. 36m 32s
    1. Understanding bit depth
      8m 49s
    2. Selecting a scan mode
      8m 20s
    3. Sharpening and its effects
      10m 40s
    4. Creating and assigning color management profiles
      8m 43s
  6. 2h 25m
    1. Taking the Tazmanian Oath!
      3m 38s
    2. Choosing your weapon
      4m 2s
    3. Setting up your scanning preferences
      12m 14s
    4. Performing a prescan
      2m 53s
    5. Assigning a scan frame
      5m 40s
    6. Determining scan resolution
      7m 57s
    7. Choosing a scan mode and bit depth
      5m 53s
    8. Naming images
      1m 49s
    9. Scanning simple logos and line art
      12m 21s
    10. Scanning complex line art
      7m 33s
    11. Scanning grayscale contones
      13m 22s
    12. Scanning color contones
      13m 54s
    13. Sharpening
      9m 39s
    14. Scanning printed/screened or patterned images
      7m 1s
    15. Scanning positive transparency film
      12m 33s
    16. Scanning negative transparency film
      9m 11s
    17. Capturing high dynamic range (HDR) scans
      1m 47s
    18. Setting up wet scans
      14m 29s
  7. 1h 48m
    1. Scanning, converting, and using simple line art
      5m 32s
    2. Scanning and using detailed line art
      10m 52s
    3. Scanning landscapes
      15m 50s
    4. Scanning product shots
      11m 58s
    5. Scanning combo/complex images
      9m 3s
    6. Adjusting distressed images
      11m 12s
    7. Scanning images with no neutrals
      11m 57s
    8. Post-scan touch-ups
      2m 7s
    9. Scanning images for multiple uses
      10m 44s
    10. Automatic scanning
      10m 40s
    11. Streamlining big jobs with batch scanning
      5m 22s
    12. Using your manufacturer's scanning software
      3m 14s
  8. 27s
    1. Goodbye
      27s

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