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labelbarcodebarcode-scannerbarcode-printing

How to achieve constant width for barcodes; regardless of barcode-data

Currently I'm programming a label-writer (Brother QL-570, if it matters, in Java) to print barcodes with different ID's. The length of the barcode data can vary from ~17 characters to ~3.

However, given that I've understood the barcode-concept correctly, the more data - the wider will the barcode become.

I'd prefer if all barcodes had the same, contstant size: no matter data-length. (It won't look good if the barcode doesn't fill up the label, nor will it (work) if it's too large)

How can one handle this when the labels are at a fixed size (i.e 29mm x 90mm)? How did you / your company solve this problem? 2D-barcodes aren't an option. Sadly.

enter image description here

Solution

  • It's going to look kinda funny if you have to compare barcodes of different widths side-by-side, but my company solved it by defining each symbol in terms of a 1x?? bitmap and scaling it up to the size required for the application. For example, each code 128 symbol, except Stop, is eleven pixels wide. Our "font" then has 107 characters defined, each a 1x11 black and white bitmap (PNG).

    It makes fitting the barcode into the space provided much simpler if you have that much control over vertical and horizontal dimensioning.

    Here's a quick example similar to the picture up above:

        <img 
    alt="104,{Start B}" title="104,{Start B}" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAABAQMAAAAy+cYDAAAABlBMVEUAAAD///+l2Z/dAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAADklEQVQIHQEDAPz/AC3gAT0BDuLeG4IAAAAASUVORK5CYII=" width="30" height="30"><img
    alt=" 17,A:{1},B:{1}" title=" 17,A:{1},B:{1}" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAABAQMAAAAy+cYDAAAABlBMVEUAAAD///+l2Z/dAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAADklEQVQIHQEDAPz/AGMgAOkAhBjTObMAAAAASUVORK5CYII=" width="30" height="30"><img
    alt=" 18,A:{2},B:{2}" title=" 18,A:{2},B:{2}" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAABAQMAAAAy+cYDAAAABlBMVEUAAAD///+l2Z/dAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAADklEQVQIHQEDAPz/ADGgAQUA0nI/mr0AAAAASUVORK5CYII=" width="30" height="30"><img
    alt=" 19,A:{3},B:{3}" title=" 19,A:{3},B:{3}" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAABAQMAAAAy+cYDAAAABlBMVEUAAAD///+l2Z/dAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAADklEQVQIHQEDAPz/ADRgAMsAlQDS68kAAAAASUVORK5CYII=" width="30" height="30"><img
    alt=" 08,A:{(},B:{(}" title=" 08,A:{(},B:{(}" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAABAQMAAAAy+cYDAAAABlBMVEUAAAD///+l2Z/dAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAADklEQVQIHQEDAPz/AHNgAUkA1ElZCJAAAAAASUVORK5CYII=" width="30" height="30"><img
    alt="106,{Stop}"title="106,{Stop}"src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA0AAAABAQMAAAA/57ZEAAAABlBMVEUAAAD///+l2Z/dAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAADklEQVQIHQEDAPz/ADigARMA2dpJzT8AAAAASUVORK5CYII=" width="30" height="30">
    <p/>
    123
    <br>
    <p>&nbsp;</p>
    <img 
    alt="104,{Start B}" title="104,{Start B}" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAABAQMAAAAy+cYDAAAABlBMVEUAAAD///+l2Z/dAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAADklEQVQIHQEDAPz/AC3gAT0BDuLeG4IAAAAASUVORK5CYII=" width="9" height="30"><img
    alt=" 17,A:{1},B:{1}" title=" 17,A:{1},B:{1}" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAABAQMAAAAy+cYDAAAABlBMVEUAAAD///+l2Z/dAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAADklEQVQIHQEDAPz/AGMgAOkAhBjTObMAAAAASUVORK5CYII=" width="9" height="30"><img
    alt=" 18,A:{2},B:{2}" title=" 18,A:{2},B:{2}" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAABAQMAAAAy+cYDAAAABlBMVEUAAAD///+l2Z/dAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAADklEQVQIHQEDAPz/ADGgAQUA0nI/mr0AAAAASUVORK5CYII=" width="9" height="30"><img
    alt=" 19,A:{3},B:{3}" title=" 19,A:{3},B:{3}" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAABAQMAAAAy+cYDAAAABlBMVEUAAAD///+l2Z/dAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAADklEQVQIHQEDAPz/ADRgAMsAlQDS68kAAAAASUVORK5CYII=" width="9" height="30"><img
    alt=" 20,A:{4},B:{4}" title=" 20,A:{4},B:{4}" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAABAQMAAAAy+cYDAAAABlBMVEUAAAD///+l2Z/dAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAADklEQVQIHQEDAPz/ADYgAI8AVxcQlAsAAAAASUVORK5CYII=" width="9" height="30"><img
    alt=" 21,A:{5},B:{5}" title=" 21,A:{5},B:{5}" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAABAQMAAAAy+cYDAAAABlBMVEUAAAD///+l2Z/dAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAADklEQVQIHQEDAPz/ACNgAKkAhD/i5lYAAAAASUVORK5CYII=" width="9" height="30"><img
    alt=" 22,A:{6},B:{6}" title=" 22,A:{6},B:{6}" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAABAQMAAAAy+cYDAAAABlBMVEUAAAD///+l2Z/dAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAADklEQVQIHQEDAPz/ADFgAMUAksTlwtMAAAAASUVORK5CYII=" width="9" height="30"><img
    alt=" 23,A:{7},B:{7}" title=" 23,A:{7},B:{7}" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAABAQMAAAAy+cYDAAAABlBMVEUAAAD///+l2Z/dAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAADklEQVQIHQEDAPz/ABIgAEcAM15OsZIAAAAASUVORK5CYII=" width="9" height="30"><img
    alt=" 24,A:{8},B:{8}" title=" 24,A:{8},B:{8}" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAABAQMAAAAy+cYDAAAABlBMVEUAAAD///+l2Z/dAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAADklEQVQIHQEDAPz/ABZgAI8Ad3Mh6bwAAAAASUVORK5CYII=" width="9" height="30"><img
    alt=" 25,A:{9},B:{9}" title=" 25,A:{9},B:{9}" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAABAQMAAAAy+cYDAAAABlBMVEUAAAD///+l2Z/dAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAADklEQVQIHQEDAPz/ABpgAJcAex9glyQAAAAASUVORK5CYII=" width="9" height="30"><img
    alt=" 16,A:{0},B:{0}" title=" 16,A:{0},B:{0}" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAABAQMAAAAy+cYDAAAABlBMVEUAAAD///+l2Z/dAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAADklEQVQIHQEDAPz/AGJgAScAw0BJukMAAAAASUVORK5CYII=" width="9" height="30"><img
    alt=" 17,A:{1},B:{1}" title=" 17,A:{1},B:{1}" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAABAQMAAAAy+cYDAAAABlBMVEUAAAD///+l2Z/dAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAADklEQVQIHQEDAPz/AGMgAOkAhBjTObMAAAAASUVORK5CYII=" width="9" height="30"><img
    alt=" 18,A:{2},B:{2}" title=" 18,A:{2},B:{2}" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAABAQMAAAAy+cYDAAAABlBMVEUAAAD///+l2Z/dAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAADklEQVQIHQEDAPz/ADGgAQUA0nI/mr0AAAAASUVORK5CYII=" width="9" height="30"><img
    alt=" 19,A:{3},B:{3}" title=" 19,A:{3},B:{3}" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAABAQMAAAAy+cYDAAAABlBMVEUAAAD///+l2Z/dAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAADklEQVQIHQEDAPz/ADRgAMsAlQDS68kAAAAASUVORK5CYII=" width="9" height="30"><img
    alt=" 20,A:{4},B:{4}" title=" 20,A:{4},B:{4}" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAABAQMAAAAy+cYDAAAABlBMVEUAAAD///+l2Z/dAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAADklEQVQIHQEDAPz/ADYgAI8AVxcQlAsAAAAASUVORK5CYII=" width="9" height="30"><img
    alt=" 21,A:{5},B:{5}" title=" 21,A:{5},B:{5}" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAABAQMAAAAy+cYDAAAABlBMVEUAAAD///+l2Z/dAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAADklEQVQIHQEDAPz/ACNgAKkAhD/i5lYAAAAASUVORK5CYII=" width="9" height="30"><img
    alt=" 22,A:{6},B:{6}" title=" 22,A:{6},B:{6}" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAABAQMAAAAy+cYDAAAABlBMVEUAAAD///+l2Z/dAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAADklEQVQIHQEDAPz/ADFgAMUAksTlwtMAAAAASUVORK5CYII=" width="9" height="30"><img
    alt=" 23,A:{7},B:{7}" title=" 23,A:{7},B:{7}" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAABAQMAAAAy+cYDAAAABlBMVEUAAAD///+l2Z/dAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAADklEQVQIHQEDAPz/ABIgAEcAM15OsZIAAAAASUVORK5CYII=" width="9" height="30"><img
    alt=" 64,A:{NUL},B:{`}" title=" 64,A:{NUL},B:{`}" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAABAQMAAAAy+cYDAAAABlBMVEUAAAD///+l2Z/dAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAADklEQVQIHQEDAPz/AF5gAR8Av0A69KoAAAAASUVORK5CYII=" width="9" height="30"><img
    alt="106,{Stop}"title="106,{Stop}"src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA0AAAABAQMAAAA/57ZEAAAABlBMVEUAAAD///+l2Z/dAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAADklEQVQIHQEDAPz/ADigARMA2dpJzT8AAAAASUVORK5CYII=" width="9" height="30">
    <p/>
    12345678901234567

    Note that the dimensions are specified for each character and the barcodes will generally scan at a width of 8 or higher (depending on print quality). All characters within a barcode need identical widths. Remember that your horizontal quiet zone is a function of bar width, so try to keep at least two character widths to each side on the label.