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10.[What are the general troubleshooting steps if an image fails to decode with the JavaScript SDK?](general-troubleshooting-steps-for-decode-failure.md)
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11.[How to get rid of the delay when opening the camera?](delay-when-open-camera.md)
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12.[How can I hide the laser bar and Dynamsoft message in the default UI of the BarcodeScanner?](hide-laser-message-ui.md)
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11.[How can I hide the laser bar and Dynamsoft message in the default UI of the BarcodeScanner?](hide-laser-message-ui.md)
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### Mobile
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1. iOS & Android - [How can I reduce battery consumption?](reduce-battery-consumption.md)
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2. iOS & Android - [Why does the page sometimes freeze when I start the scanner?](page-freeze.md)
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3.IOS & Android - [How to import the settings of Barcode Scanner X app into my app?](template-support.md)
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3.iOS & Android - [How to import the settings of Barcode Scanner X app into my app?](template-support.md)
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4. iOS & Android - [How to use Debug Mode in Barcode Scanner X?](debug-mode-barcodescannerx.md)
10.[What are the general troubleshooting steps if an image fails to decode with the JavaScript SDK?](general-troubleshooting-steps-for-decode-failure.html)
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11.[How to get rid of the delay when opening the camera?](delay-when-open-camera.html)
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12.[How can I hide the laser bar and Dynamsoft message in the default UI of the BarcodeScanner?](hide-laser-message-ui.html)
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11.[How can I hide the laser bar and Dynamsoft message in the default UI of the BarcodeScanner?](hide-laser-message-ui.html)
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### Mobile
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1. IOS & Android - [How can I reduce battery consumption?](reduce-battery-consumption.md)
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2. IOS & Android - [Why does the page sometimes freeze when I start the scanner?](page-freeze.md)
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1. iOS & Android - [How can I reduce battery consumption?](reduce-battery-consumption.md)
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3. IOS & Android - [How to import the settings of Barcode Scanner X app into my app?](template-support.md)
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2. iOS & Android - [Why does the page sometimes freeze when I start the scanner?](page-freeze.md)
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4. IOS & Android - [How to use Debug Mode in Barcode Scanner X?](debug-mode-barcodescannerx.md)
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3. iOS & Android - [How to import the settings of Barcode Scanner X app into my app?](template-support.md)
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5. IOS & Android - [How can I use CameraX or third-party camera modules with Dynamsoft Barcode Reader?](no-camera-enhancer.md)
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4. iOS & Android - [How to use Debug Mode in Barcode Scanner X?](debug-mode-barcodescannerx.md)
5. iOS & Android - [How can I use CameraX or third-party camera modules with Dynamsoft Barcode Reader?](no-camera-enhancer.md)
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7. IOS - [How to resolve the "Building for iOS Simulator, but linking in dylib built for iOS" error when building for the iOS simulator?](arm64-simulator-error.md)
8. IOS - [How to resolve the "Building for iOS Simulator, but linking in dylib built for iOS" error when building for the iOS simulator?](arm64-simulator-error.md)
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7. iOS - [How to resolve the "Building for iOS Simulator, but linking in dylib built for iOS" error when building for the iOS simulator?](arm64-simulator-error.md)
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9. Android - [Can I reduce the size of the final Android app?](reduce-final-size.md)
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8. Android - [Can I reduce the size of the final Android app?](reduce-final-size.md)
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10. Android - [How to prevent project build failure after shrinking code?](proguard.md)
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9. Android - [How to prevent project build failure after shrinking code?](proguard.md)
The library scan the entire image by default when localizing the barcodes. However, if only a specific region of the image or video is required to locate the barcode, you can define a Region of Interest (ROI) via the target ROI parameter to restrict the scan area. The parameter can be set either via the `SimlifiedCaptureVisionSettings` or a JSON parameter template.
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The library scan the entire image by default when localizing the barcodes. However, if only a specific region of the image or video is required to locate the barcode, you can define a Region of Interest (ROI) via the target ROI parameter to restrict the scan area. The parameter can be set either via the `SimplifiedCaptureVisionSettings` or a JSON parameter template.
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> Notes:
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> - You can either configure these settings via the `SimlifiedCaptureVisionSettings` struct or via a JSON template.
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> - When using `SimlifiedCaptureVisionSettings`, you can only specify one region.
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> - You can either configure these settings via the `SimplifiedCaptureVisionSettings` struct or via a JSON template.
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> - When using `SimplifiedCaptureVisionSettings`, you can only specify one region.
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> - When using JSON template, you can specify more than one region.
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### Specify a ROI via SimplifiedCaptureVisionSettings
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