1. Introduction to Scanners
Principles of Information Technology
Made by Sandeep
B Voc(SD)-I
Submitted to :
Miss Hina, Asst. Professor
Computer Sci. & App. Department
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Trade & Industrial Education

2. So what is a scanner?
A scanner, simply put, is a device used to analyze an image and process it.
Scanned Image
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IT: Principals of IT – Introduction to Scanners

3. Types of Scanner
There are different types of scanners for different types of documents that need to be scanned.
Flatbed Scanners
Handheld Scanners
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IT: Principals of IT – Introduction to Scanners

4. Flatbed Scanner
Used for scanning most documents, photos, and even flat objects from a PC or laptop.
Flatbed scanner works like a copy machine.
Scans documents placed face down on the glass (scan bed)
Most common type of scanner.
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IT: Principals of IT – Introduction to Scanners

5. Handheld Scanner Smaller than the previous two scanners.
The user must move the scanner across the document.
Image quality us usually lower.
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IT: Principals of IT – Introduction to Scanners

6. Connecting the Scanner
Most modern Scanners connect to the computer through the USB.
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IT: Principals of IT – Introduction to Scanners

7. Scanning Formats
Depending on your scanning software, you may have different options of file formats in which to save your scanned image or document.
Images may be saved as:
jpg, bmp, tif, or png.
Documents may be saved as:
pdf, or any of the image formats
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IT: Principals of IT – Introduction to Scanners

8. .bmp
The BMP file format, sometimes called bitmap file format , is an image file format used to store bitmap digital images.
BMP is a very simple bitmap format used by Microsoft. It doesn't support any photo specific features - and most importantly it doesn't support color management.
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IT: Principals of IT – Introduction to Scanners

9. .jpg
jpg is the most common image format used by digital cameras and other photographic image capture devices, and is the most common format for storing and transmitting photographic images on the World Wide Web.
jpg images are considered lossy, meaning when compressed, they lose some of the data that renders the image, resulting in a lower resolution image.
© UNT in partnership with TEA
IT: Principals of IT – Introduction to Scanners

10. .png Portable Network Graphics (PNG)
Designed to replace the GIF format.
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IT: Principals of IT – Introduction to Scanners

11. .pdf
The Portable Document Format (PDF) is the file format created by Adobe Systems in 1993 for document exchange. PDF is a fixed-layout format used for representing two-dimensional documents in a manner independent of the application software, hardware, and operating system.
Each PDF file encapsulates a complete description of a 2-D document (and, with Acrobat 3-D, embedded 3-D documents) that includes the text, fonts, images, and 2-D vector graphics that compose the documents.
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IT: Principals of IT – Introduction to Scanners

12. After Scanning
After scanning, you may need to modify your image in a graphic editing program.
Crop
Brightness
Contrast
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IT: Principals of IT – Introduction to Scanners

13. Crop To crop an image means to cut away, or trim, the image.
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IT: Principals of IT – Introduction to Scanners

14. Crop © UNT in partnership with TEA
IT: Principals of IT – Introduction to Scanners

15. Brightness Refers to the lightness and darkness of a color.
Also referred to as tone or value.
Original Image
Increased Brightness
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IT: Principals of IT – Introduction to Scanners

16. Contrast
Contrast is the difference in visual properties that makes an object (or its representation in an image) distinguishable between other objects and the background.
Original Image
Increased Contrast
© UNT in partnership with TEA
IT: Principals of IT – Introduction to Scanners