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Terms of Use

The sites https://www.abbyy.com/, https://help.abbyy.com/ and other ABBYY-owned sites (collectively, “Site”) are the property of ABBYY Development Inc. and affiliates, the ABBYY group companies ("ABBYY") and its licensors. BY USING THE SITE, YOU AGREE TO THESE TERMS OF USE; IF YOU DON’T AGREE, DO NOT USE THE SITE.

The services and information that ABBYY provides to You are subject to the following Terms of Use (referred to as “Terms”). ABBYY reserves the right, at its sole discretion, to change, modify, add or remove portions of these Terms, at any time. It is Your responsibility to check these Terms for amendments. ABBYY reserves the right to do any of the following, at any time, without notice: to modify, suspend or terminate operation of or access to the Site, or any portion of the Site, for any reason; to modify or change the Site, or any portion of the Site; and to interrupt the operation of the Site or any portion of the Site for maintenance or other reason. You may not use the Site or any Content for any purpose that is unlawful or prohibited by these Terms, or to solicit the performance of any illegal activity or other activity which infringes the rights of ABBYY or others. You agree that ABBYY may, in its sole discretion and without prior notice, terminate Your access to the Site and/or block Your future access to the Site if ABBYY finds that You have violated these Terms or other agreements. You agree that any violation by You of these Terms will constitute an unlawful and unfair business practice. You agree that ABBYY may, in its sole discretion and without prior notice, terminate Your access to the Site. You agree that ABBYY will not be liable to You or to any third party for termination of Your access to the Site as a result of any violation of these Terms.

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Subscription Terms

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Partner Subscription Terms

The Partner Subscription Terms incorporate terms on subscription, billing and payment procedure for the use of ABBYY Software on a Subscription-based model by partners. You can review the full terms here.

May 2021

How to Implement Image Capture Processing

Note: Before you begin, see How to Add the Library to Your Xcode Project.

To implement the image capture scenario, follow these steps:

Implement a delegate conforming to the RTRImageCaptureServiceDelegate protocol. The delegate will handle messages from the image capture service. Here are the recommendations on what its methods should do:

The onBufferProcessedWithStatus:result: method is where you work with the results, display them to the user, etc.
The onError: method is for handling processing errors.
The onWarning: method can optionally be used to show warnings to the user.

Create an RTREngine object using the sharedEngineWithLicenseData: method. The method requires an NSData object containing your license data. For example, you can use dataWithContentsOfFile: to create a data object, then pass this object to the sharedEngineWithLicenseData: method.
Use the createImageCaptureServiceWithDelegate: method of the RTREngine object to create a background image capture service. Only one instance of the service per application is necessary: multiple threads will be started internally.
Implement a delegate that adopts the AVCaptureVideoDataOutputSampleBufferDelegate protocol. Instantiate an AVCaptureSession object, add video input and output and set the video output delegate. When the delegate receives a video frame via the captureOutput:didOutputSampleBuffer:fromConnection: method, pass this frame on to the image capture service by calling the addSampleBuffer: method.
We recommend using the AVCaptureSessionPreset1920x1080 preset for your AVCaptureSession.
Also note that your video output must be configured to use the kCVPixelFormatType_32BGRA video pixel format.
Process the messages sent by the service to the RTRImageCaptureServiceDelegate delegate object. The result will be delivered via the onBufferProcessedWithStatus:result: method. It also reports the result stability status, which indicates if the result is available and if it is likely to be improved by adding further frames (see the Status parameter).
Process the delivered result using the RTRImagingCoreAPI functionality:

load the captured image to an RTRCoreAPIImage protocol instance;
crop it with the RTRCoreAPICropOperation in case the lens correction is required.

Export the processed result to the server in one of available formats: JPG, JPG 2000, PNG or PDF. It is recommended to use the RTRCoreAPIExportCompressionNormalLevel compression mode for saving high quality while reducing image size.
When pausing or quitting the application, call the stopTasks method to stop processing and clean up image buffers. The image capture service keeps its configuration settings and necessary resources. The processing will start automatically on the new call to the addSampleBuffer: method.

See the description of classes and methods in the API Reference section.

02.03.2022 12:59:15