tiscamera IC Barcode Demo

This sample demonstrates how to use the The Imaging Source Barcode Library from IC Barcode for AMD 64 or IC Barcode for ARM 64 in a Qt based C++ program.

Prerequisites

• IC Barcode library (see above)
• C++
• tiscamera 1.1.n from Releases
• tiscamera dev packages from Releases
• Qt dev packages
• A The Imaging Source video capture device from here

Building

After all above mentioned packages have been installed, the demo is built with

mkdir build
cd build 
cmake ..
make

Execution

cd build 
./ICBarcode

Usage

Device selection

Click on the "Device" menu an select "Select". That opens the device selection dialog:

After a device is selected, it is started and barcodes can be scanned:

On the image is a Code128 and a Datamatrix Code. Both can be scanned on the same image. They are also position invariant.

Device Properties

This sample contains a properties dialog for setting all properties:

The device selection and the device properties dialogs are in the tcamcamera subdirectory. This can be used in your own software.

Source Code

Choosing barcodes to detect

The barcode to be detected can be specified as follows:

	int formats = 0;
	formats |= ICBarcode_Format::IC_BARCODEFORMAT_CODE_128;
	formats |= ICBarcode_Format::IC_BARCODEFORMAT_CODE_93;
	formats |= ICBarcode_Format::IC_BARCODEFORMAT_EAN_13;
	formats |= ICBarcode_Format::IC_BARCODEFORMAT_EAN_8;
	formats |= ICBarcode_Format::IC_BARCODEFORMAT_UPC_A;
	formats |= ICBarcode_Format::IC_BARCODEFORMAT_QR_CODE;
    formats |= ICBarcode_Format::IC_BARCODEFORMAT_DATA_MATRIX;
	//formats |= ICBarcode_Format::IC_BARCODEFORMAT_INTERLEAVED_2_OF_5;
	//formats |= ICBarcode_Format::IC_BARCODEFORMAT_CODE_39;
    
	ICBarcode_SetBarcodeFormats(_callback_user_data.pIC_BarcodeScanner, formats);

The shorter the list, the faster is the detection.

Multithreading and events

Gstreamer runs in a different thread, than the QT GUI. Therefore, the barcode results will be passed by an event structure to the GUI mainthread. For this, the event handler and classes are defined in mainwindow.h

Graphic Overlay

The graphical display of a red frame around the overlay is done with the GSteamer rsvgoverlay element. It receives an XML string which contains the graphic description.

Questions and Contact

For questions please contact us at https://www.theimagingsource.com/en-us/company/contact/.