CODEWITHSUNDEEP
c#barcode
suchislife
suchislife

Reputation: 1

How to Resize a Barcode?

I created a tool that generates PDF417 2D barcodes. The output png file is 290x78 pixels.

The reason behind this width and height is a formula used to create this symbol so that it is correctly read by bar code scanners.

My symbol is 13 columns and 39 rows.

This formula is:

Width = ((17 * # of columns) + 69) X + 2 (size of quiet zone)
Height = (# of rows) (row height) + 2 (size of quiet zone)

So:

17 * 13 + 69 = 290px
39 * 2 = 78px

My question is the software I use to create these bar codes allows you to save the file to this size but prints it at a different size.

These print parameters turn out to be as follow but I cannot figure out how to calculate them:

X Dimension (in)       :0.0067
Y Dimension (in)       :0.0133
Height x Width (in)    :0.52 x 1.93
Height x Width (mm)    :13.21 x 49.11
Rows x Columns         : 39 x 13   
Error Correction Level :5
Bytes Encoded          :257
SLD Codeword           :1
Data Codewords         :157
Pad Codewords          :285
MPDF Codewords         :0
EC Codewords           :64
Total Codewords        :507

Here's a snapshot of the program I currently use:

enter image description here

Upvotes: 0

Views: 1684

Answers (1)

Ken
Ken

Reputation: 1985

This appears to be an issue of DPI and print size. 

pixels/dpi=inches

or if you're going the other way

inches x dpi = pixels

You can set the DPI dropdown in your software to the necessary value.

See this calculator to play with the values: http://auctionrepair.com/pixels.html

Upvotes: 1

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