We've got some with similar numbers but very different sized bars and are curious to know why?
2006-06-29 04:21:55 · 11 answers · asked by hldjw 2 in Science & Mathematics ➔ Other - Science
Each digit is coded by two black and two white stripes. The stripes have widths of from 1 to 4 units, and the total width for each digit is always seven units.
This code is not quite all there is to it, however. Some digits of the barcode are reversed, so that they read right to left. Part of the code has black and white inverted, so black stripes are white and vice versa. This helps cut down errors and allows a computer to work out if the code was read from the wrong end when it was scanned.
2006-06-29 04:26:40 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Barcodes work through the scanner, or reader, distinguishing between dark and non dark bands. Using combinations of dark and light, and thicknesses of dark and light, different values are assigned. The actual values are determined by the people who designed the barcode scheme, of which there can be many.
2006-06-29 07:39:51 · answer #2 · answered by Anonymous · 1⤊ 0⤋
it is binary code black and white stripes are 1's and 0's
at thick line (white or black, may be several 1's or 0's) the reason similar numbers have different looking patterns is to do with the way decimal numbers are represented in binary!
1 = 1
2 = 10
3 =11
4 = 100
5= 101
6 = 110
31 = 011111
32 = 100000
2006-06-29 04:29:50 · answer #3 · answered by Nick Johnston 2 · 1⤊ 0⤋
I've always wonder that, and can I draw lines and will it work with a barcode reader?
2006-06-29 04:25:11 · answer #4 · answered by Not_Here 6 · 1⤊ 0⤋
you go look in your refrigerator or pantry right now, you will find that just about every package you see has a UPC bar code printed on it. In fact, nearly every item that you purchase from a grocery store, department store and mass merchandiser has a UPC bar code on it somewhere.
2006-06-29 04:26:23 · answer #5 · answered by mejologz 2 · 1⤊ 0⤋
black absorbs light, white reflects light. Shine a laser at a black/white image, and the return rays will be the white spaces. What's missing is what was black.
By making different markings for different numbers, shining at laser at these marking will return different results.
2006-06-29 04:26:00 · answer #6 · answered by bequalming 5 · 1⤊ 0⤋
yeah i use a program at work to generate bare codes . you can get it from the internet .
2006-06-29 05:45:32 · answer #7 · answered by daniel n 1 · 1⤊ 0⤋
yeah.......every week in the supermarket...beep beep beep...... and then i get mugged by the cashier...
BEWARE THE BARCODE
2006-07-02 03:06:28 · answer #8 · answered by El Mariachi 4 · 1⤊ 0⤋
a barcode..............in guitar playin...makes a cord sharper or flat....eg... e ----->e#
em---->e# # = SHARP
2006-06-29 04:27:45 · answer #9 · answered by Anonymous · 1⤊ 0⤋
I do!!
2006-06-29 04:27:48 · answer #10 · answered by TB 5 · 1⤊ 1⤋