Create Your First Project

This step-by-step tutorial will guide you to build a complete application that analyzes a Code 39 barcode from an image and output the value, type, location and confidence to the terminal. NOTE: You may want to try our sample application first before creating your first project.

For this tutorial, you can use any text editor (vim, gedit, emacs, etc.).

Steps:

Create a new file titled BXDemo.js

Import the Barcode module:

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const bx = require("barcode-js");

Create the parameters to use for recognition - namely, the input image and the barcode type to recognize. Change the file name in this example to an image on your local system.:

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const filePath = "filePath/fileName.bmp"; const params = { type: bx.BarcodeType.ALL };

Specifying only the barcode type or types that you are interested in will speed up the analysis. For example, you can use "code39", ["code39", "code128"], or "all". If you omit the barcode type completely, "all" is assumed.

Perform analyze on your barcode image:

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const analyzeBarcodes = async (filePath, params) => { try { const results = await bx.analyze(filePath, params); console.log(JSON.stringify(results, ["type", "value", "confidence"], 2)); } catch(err) { console.error(`There was an error processing this image\n${err}`); } } analyzeBarcodes(filePath, params);

JavaScript

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const analyzeBarcodes = async (filePath, params) => {
    try {
        const results = await bx.analyze(filePath, params);
        console.log(JSON.stringify(results, ["type", "value", "confidence"], 2));
    }
    catch(err) {
        console.error(`There was an error processing this image\n${err}`);
    }
}

analyzeBarcodes(filePath, params);

That’s it! Now go to the console and run your application to see the result output data:

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$ node BXDemo