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Co-Authored-By: kotte <14197736+mrtamagotchi@users.noreply.github.com> Co-Authored-By: mikaeltellhed <2311083+mikaeltellhed@users.noreply.github.com> Co-Authored-By: Tore Knudsen <18231882+torekndsn@users.noreply.github.com> Co-Authored-By: Michael Cartner <32543275+michaelcartner@users.noreply.github.com>
24 lines
1.8 KiB
Markdown
24 lines
1.8 KiB
Markdown
---
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title: Scanning for QR Codes in uploaded images
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hide_title: true
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---
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# Scanning for QR Codes in uploaded images
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This example enables you to scan uploaded images for Quick Response (QR) Codes and fetch the resulting data in the QR Code. To scan for QR Codes via a camera feed, see the documentation on the [Camera QR Scanner](/library/modules/qr-scanner/guides/camera-feed).
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**The Image QR Scanner** node works in conjunction with the **Open File Picker** node, which is used to upload an image that will be scanned for QR Codes. You can read more about the **File Picker** node [here](/nodes/utilities/open-file-picker). In the image below you can see how such a node tree might look.
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## A simple example setup
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In the example below, we use a [Button Node](/nodes/ui-controls/button) to open the **File Picker**. Once a file has been successfully uploaded and sent to the QR Node, the <span className="ndl-data">Scan Result</span> is returned to the [Text Node](/nodes/basic-elements/text) where the data contained in the QR Code will be displayed.
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import ImportButton from '/src/components/importbutton'
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import useBaseUrl from '@docusaurus/useBaseUrl'
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<div className="ndl-image-with-background l">
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<img src={useBaseUrl("/library/modules/qr-scanner/guides/image-upload/qr-image-upload.png")} className="ndl-image large"></img>
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<ImportButton zip="/library/modules/qr-scanner/guides/image-upload/qr-image-upload.zip" name="Uploaded File QR Scanner" thumb="/library/modules/qr-scanner/qr_noodlnet.png"/>
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</div>
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Note that In this particular example, no text will be shown if QR Code can’t be found or read from the uploaded image. You can use the <span className="ndl-signal">Scan Success/Scan Failed</span> signals of the **Image QR Scanner** node to include error handling, but this is not shown in this simple setup.
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