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This article introduces how to read DPM codes. |
Read DPM Codes |
DPM, Direct Part Marking |
It is the process of creating permanent markings on the surface of a part to help identify it. DPM Codes are used widely in industrial part tracking, from electronics manufacturing to automotive assembly. Atypical from general scenarios, DPM Codes present more challenges, including light reflection interference from the surface the code is printed on, low contrast, and complex background texture. For reference, here are two sample images of DPM codes:
Dynamsoft Barcode Reader (DBR) provides a parameter, [DPMCodeReadingModes]({{ site.parameters_reference }}dpm-code-reading-modes.html#dpmcodereadingmodes), to control how to decode DPM codes. To enable the DPM feature, simply set a DPMCRM_GENERAL mode to this parameter.
The following code snippet shows how to set the parameter via RuntimeSettings to read DPM code.
>- JavaScript >- C >- C++ >- C# >- Java >- Android >- Objective-C >- Swift >- Python > > ```javascript const scanner = scanner || await Dynamsoft.DBR.BarcodeScanner.createInstance(); let settings = await scanner.getRuntimeSettings(); // Sets dpmCodeReadingModes to support DPM reading. settings.furtherModes.dpmCodeReadingModes[0] = Dynamsoft.DBR.EnumDPMCodeReadingMode.DPMCRM_GENERAL; await scanner.updateRuntimeSettings(settings); scanner.onUniqueRead = (txt, result) => { alert(txt); }; await scanner.show(); ``` > ```c int iRet = -1; char errorBuf[512]; iRet = DBR_InitLicense("YOUR-LICENSE-KEY", errorBuf, 512); if (iRet != DBR_OK) { printf("%s\n", errorBuf); } void* barcodeReader = DBR_CreateInstance(); PublicRuntimeSettings runtimeSettings; DBR_GetRuntimeSettings(barcodeReader, &runtimeSettings); //Get the current RuntimeSettings runtimeSettings.furtherModes.dpmCodeReadingModes[0] = DPMCRM_GENERAL; // Set a DPMCRM_GENERAL mode to read DPM codes DBR_UpdateRuntimeSettings(barcodeReader, &runtimeSettings, errorBuf, 512); // Update RuntimeSettings with above setting DBR_DecodeFile(barcodeReader, "YOUR-IMAGE-FILE-WITH-DPM-CODES", ""); // Start decoding // Add further process ``` > ```cpp char errorBuf[512]; int iRet = -1; iRet = dynamsoft::dbr::CBarcodeReader::InitLicense("YOUR-LICENSE-KEY", errorBuf, 512); if (iRet != DBR_OK) { cout << errorBuf << endl; } CBarcodeReader* reader = new CBarcodeReader(); PublicRuntimeSettings* runtimeSettings = new PublicRuntimeSettings(); reader->GetRuntimeSettings(runtimeSettings); //Get the current RuntimeSettings runtimeSettings->furtherModes.dpmCodeReadingModes[0] = DPMCRM_GENERAL; // Set a DPMCRM_GENERAL mode to read DPM codes reader->UpdateRuntimeSettings(runtimeSettings, errorBuf, 512); // Update RuntimeSettings with above setting reader->DecodeFile("YOUR-IMAGE-FILE-WITH-DPM-CODES", ""); // Start decoding // Add further process ``` > ```csharp string errorMsg; EnumErrorCode iRet = BarcodeReader.InitLicense("YOUR-LICENSE-KEY", out errorMsg); if (iRet != EnumErrorCode.DBR_SUCCESS) { Console.WriteLine(errorMsg); } BarcodeReader reader = new BarcodeReader(); PublicRuntimeSettings settings = reader.GetRuntimeSettings(); //Get the current RuntimeSettings settings.FurtherModes.DPMCodeReadingModes[0] = EnumDPMCodeReadingMode.DPMCRM_GENERAL; // Set a DPMCRM_GENERAL mode to read DPM codes reader.UpdateRuntimeSettings(settings); // Update RuntimeSettings with above setting TextResult[] result = reader.DecodeFile("YOUR-IMAGE-FILE-WITH-DPM-CODES", ""); // Start decoding // Add further process ``` > ```java BarcodeReader.initLicense("YOUR-LICENSE-KEY"); BarcodeReader reader = new BarcodeReader(); PublicRuntimeSettings settings = reader.getRuntimeSettings(); //Get the current RuntimeSettings settings.furtherModes.dpmCodeReadingModes[0] = EnumDPMCodeReadingMode.DPMCRM_GENERAL; // Set a DPMCRM_GENERAL mode to read DPM codes reader.updateRuntimeSettings(settings); // Update RuntimeSettings with above setting TextResult[] result = reader.decodeFile("YOUR-IMAGE-FILE-WITH-DPM-CODES", ""); // Start decoding // Add further process ``` > ```java BarcodeReader reader = new BarcodeReader(); PublicRuntimeSettings settings = reader.getRuntimeSettings(); //Get the current RuntimeSettings settings.furtherModes.dpmCodeReadingModes[0] = EnumDPMCodeReadingMode.DPMCRM_GENERAL; // Set a DPMCRM_GENERAL mode to read DPM codes reader.updateRuntimeSettings(settings); // Update RuntimeSettings with above setting TextResult[] result = reader.decodeFile("YOUR-IMAGE-FILE-WITH-DPM-CODES"); // Start decoding // Add further process ``` > ```objc NSError* err = nil; DynamsoftBarcodeReader* reader = [[DynamsoftBarcodeReader alloc] init]; iPublicRuntimeSettings* settings = [reader getRuntimeSettings:&err]; //Get the current RuntimeSettings settings.furtherModes.dpmCodeReadingModes[0] = EnumDPMCodeReadingModeGeneral; // Set a DPMCRM_GENERAL mode to read DPM codes [reader updateRuntimeSettings:settings error:&err]; // Update RuntimeSettings with above setting NSArray* result = [reader decodeFileWithName:@"YOUR-IMAGE-FILE-WITH-DPM-CODES" error:&err]; // Start decoding // Add further process ``` > ```swift let reader = DynamsoftBarcodeReader() let settings = try? reader.getRuntimeSettings() //Get the current RuntimeSettings settings?.furtherModes.dpmCodeReadingModes[0] = EnumDPMCodeReadingMode.general; // Set a DPMCRM_GENERAL mode to read DPM codes try? reader.updateRuntimeSettings(settings) // Update RuntimeSettings with above setting let result = try? reader.decodeFileWithName("YOUR-IMAGE-FILE-WITH-DPM-CODES") // Start decoding // Add further process ``` > ```python error = BarcodeReader.init_license("YOUR-LICENSE-KEY") if error[0] != EnumErrorCode.DBR_OK: print(error[1]) dbr = BarcodeReader() settings = dbr.get_runtime_settings() settings.dpm_code_reading_modes[0] = EnumDPMCodeReadingMode.DPMCRM_GENERAL dbr.update_runtime_settings(settings) text_results = dbr.decode_file("YOUR-IMAGE-FILE-WITH-DPM-CODES") # Add further process ```