Tuesday, May 1, 2012
Algorithms! Modulus 43 algorithm.
The most difficult part of barcodes. Try understanding them and if you need help feel free to ask one of our group members! Have fun! Try solving for the different barcodes around you that use Mod43!
The check digit for Code 39 can be calculated using Modulus 43. Code 39 barcodes can come with numbers and letters, and using the table below we can obtain a number which represents the symbol reflected on the barcode. By adding all the values up and dividing by 43, the remainder is the check digit.
The check digit for Code 39 can be calculated using Modulus 43. Code 39 barcodes can come with numbers and letters, and using the table below we can obtain a number which represents the symbol reflected on the barcode. By adding all the values up and dividing by 43, the remainder is the check digit.
Algorithms! Modulus 10 algorithm.
The most difficult part of barcodes. Try understanding them and if you need help feel free to ask one of our group members! Have fun! Try solving for the different barcodes around you that use Mod10!
Algorithms! Modulus 11 algorithm.
The most difficult part of barcodes. Try understanding them and if you need help feel free to ask one of our group members! Have fun! Try solving for the different barcodes around you that use Mod11!
Numbers multiplied by their position starting from left to right.
ISBN-10 (10 digits):
10, 9, 8... 2
ISSN (8 digits):
8, 7, 6... 2
The position "1" is the check digit which is what we are solving for.
Then divide the sum by 11 and subtract the remainder from 11 and you get the check digit!
Numbers multiplied by their position starting from left to right.
ISBN-10 (10 digits):
10, 9, 8... 2
ISSN (8 digits):
8, 7, 6... 2
The position "1" is the check digit which is what we are solving for.
Then divide the sum by 11 and subtract the remainder from 11 and you get the check digit!
Deciphering Code 39!
Ever notice the weird lines that look like barcodes but without numbers at the bottom of your EZLink cards? Those are actually barcodes! Use this method to decode the barcode and see what is encoded in them! *Remember about the asterisks at both ends!
For those who have TLL cards, try deciphering them too! (the part where you scan!)
For those who have TLL cards, try deciphering them too! (the part where you scan!)
Interesting Facts on the UPC-12!
Classification of UPC A barcode on basis of digits 0,1,2,3,4,5,6,7,8,9.
0,1,6,7,8,9: Engaged only with most common regular things.
2: Assigned to according to weight variables.
3: Drug and Health products by National Drug Code.
4: Local use in retail stores and warehouses on loyalty cards and coupons and non-food products.
5: For coupons only.
0,1,6,7,8,9: Engaged only with most common regular things.
2: Assigned to according to weight variables.
3: Drug and Health products by National Drug Code.
4: Local use in retail stores and warehouses on loyalty cards and coupons and non-food products.
5: For coupons only.
ISSN Barcode Structure
1. The ISSN/ISBN number - printed above the barcode
2. Prefix - The prefix 977 is for ISSN, 978 for ISBN.
3. The ISSN/ISBN number minus the check digit - Only the first seven digits of the ISSN number appear in the bar code. The ISSN check digit is not represented.
4. Sequence variant - A two digit space is used to hold the number of times the issue price has changed since the bar code was first used on the publication.
5. The check digit
6. Two digit add-on - Issue number, usually 2/5 digits
2. Prefix - The prefix 977 is for ISSN, 978 for ISBN.
3. The ISSN/ISBN number minus the check digit - Only the first seven digits of the ISSN number appear in the bar code. The ISSN check digit is not represented.
4. Sequence variant - A two digit space is used to hold the number of times the issue price has changed since the bar code was first used on the publication.
5. The check digit
6. Two digit add-on - Issue number, usually 2/5 digits
Barcodes!
Some other interesting barcodes! More at http://www.demilked.com/cool-and-creative-bar-code-designs/
Beautiful QR Codes!
Here are some of the beautiful QR Codes we used in our presentation! Aren't they so creative? Find more amazing artworks at http://mashable.com/2011/07/23/creative-qr-codes/#21193BONUS now!
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