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MaRussiya [10]
3 years ago
9

Differences between barcode reader and character recognition devices​

Computers and Technology
2 answers:
soldier1979 [14.2K]3 years ago
7 0

A barcode reader is an optical scanner that reads printed barcodes. Barcodes are visual representations of data that convey information by varying the widths and spacings of parallel lines. Barcode readers consist of a light source, a lens and a light sensor. On the other hand, an optical character recognition device is a device that converts images of typed or handwritten text into machine-encoded text.

These systems are similar because they both use optical recognition. They are also similar in the sense that they both scan data. However, they can be quite different. A barcode reader is simply designed to obtain a single piece of data from a barcode, while a character recognition device can gather extensive information about text, including formatting. Moreover, a barcode reader can only read a barcode made with the correct specifications. Character recognition devices are more flexible and versatile, being able to read printed material, billboards, subtitles on images, etc.

spin [16.1K]3 years ago
3 0

<u><em>Differences between barcode reader and character recognition devices​:</em></u>

Barcode Reader or Barcode Scanner:  

  • Barcode Scanner scans the data by brightening the barcodes usingSensor
  • The analog signal is then converted into digital signal by Converter.
  • The Decoder calculates the converted data and sends valid data to the computer.  

Character Recognition Devices (OCR):

  • OCR scans the physical document and converts them into two-coloured format.
  • The darker and lighter area are identified as characters and blanks respectively.
  • The common methods used are: Pattern Recognition and Feature Detection.

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Intro to cs 3.7 edhesive g=float(input("Enter your English test grade:")) if(g&lt;=64): print("F") if (g&gt;=65 and g&lt;69): pr
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Answer:

The correct code for this question:

g=float(input("Enter your English test grade:")) #take input from user.

#check conditions

if (g>=100 and g<=90):

print ("A")

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if (g>=89 and g<=80):

print("B")

#g greater then equal to 89 and less then equal to 80.

if (g>=79 and g<=70):

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if (g>=69 and g<=65):

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else:

print ("Not a grade")

#not a grade or fail.

Explanation:

In this program, we use to take a value from the user and check the value from the various conditions. To check all the condition we use if-else statement and AND operator that check to the range to together.

If -else is a conditional operator. In that, If block is used to check the true part and else part takes false value, and AND is a logical operator that check the two range together  

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The hashing function can take any number of key-value pairs and there is no specific limit to it.

<h3>What is hashing?</h3>

Hashing is a file-based algorithm for producing a fixed-length bit string value. A file is essentially a collection of data blocks. The length of the data is reduced by hashing to a fixed number or key that represents the original string.

When hashing is employed, the hash function may plot all of the keys and values to what the real size of the table is, demonstrating that the hashing function can take any number of key-value pairs with no restriction.

However, if the passwords are hashed in encryption, recovering the passwords is extremely difficult.

Thus, the hashing function can take any number of key-value pairs and there is no specific limit to it.

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