Conversion of jpg to ASCII for code output ZPL-Zebra printer

I print on a Zebra ZM400 using the ZPL code. I can upload images to the printer using Zebra utilities and I remember these images to print on a label, but I have to be able to download pictures using the ZPL code (using the ~ DG command). The ~ DG command needs the JPG image to ASCII format. I have other images that were already converted to ASCII (by someone else) that I am able to print, so I know what I do works as expected, however my problem is that I have new images which must be converted to ASCII format required and I don't know how to do this.

So, my goal is to print a picture on a Zebra printer, but my real question is to know how to convert a JPG image to ASCII format (for the Zebra printer).

Let me know if you need more information.

Thank you

Hi Emily,.

Unfortunately, I have not well understand how this has been done before that the person who had previously completed a conversion is no longer works for our company.

The ZM400 printer uses ZPL II of Zebra language to create/format of labels and the printer setup/order. Instead of download chart (~ DG), I am now using the command object download (~ DY), located in the ZPL II (182 p) programming guide. This allowed me to use a. File PNG rather than JPG, which was easier to work with.

http://www.Zebra.com/apps/dlmanager?DLP=-227178c9720c025483893483886ea54a70963bb77ca94fcc1d65ce93943...

I was able to use a modified version of your suggested method to make it work. The ~ DY command takes a parameter (data) which is a 'hexadecimal ASCII string defining the image', which is defined as: "the data string sets the image and is a hexadecimal representation of ASCII image. Each character represents a horizontal nibble by 4 points. "So the method you suggested is exactly what I had to do, however I didn't say that it must be represented in hexadecimal ASCII code.

I converted the binary file reads (of the PNG) data into a byte array, then made a (padded two-digit in hexadecimal) number of channels within a loop conversion For to give the ASCII representation of the binary data. This gives a hexadecimal representation of ASCII to binary data. VI is attached.

Thanks for your help!

I encountered another problem: the PNG files took an eternity for the printer load into memory when printing (compared to the same image in Zebra. GRF format). I solved this re-reading the file saved on the printer, where it is native. GRF format (using the ^ HG command), then re-recording this output (now in the ZPL code formatted) to the printer. I guess there is a way to convert directly to the. Format of the GRF, but for now it does not work in my case.

Thanks again!

Tags: NI Software

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