scan images

Generated on 7/31/2024

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To scan images, Apple has introduced several enhancements in the Vision framework, as discussed in the session Discover Swift enhancements in the Vision framework. Here are some key points:

Barcode Scanning: You can configure the barcode scanning request to scan for specific types of barcodes, such as EAN-13, which is commonly used in grocery stores. This optimization improves performance by focusing on relevant barcode types.
Concurrency for Image Processing: To process multiple images efficiently, you can use Swift concurrency. This allows you to handle batches of images simultaneously, improving performance. For example, you can use task groups to process images in parallel, limiting the number of concurrent tasks to manage memory usage effectively.
Saliency Image Request: To crop images to their main subjects, you can use the generateObjectnessBasedSaliencyImageRequest. This request identifies the main subjects in an image, allowing you to create focused crops around them.
Image Aesthetic Scores: A new request called calculateImageAestheticScoresRequest can assess image quality and find memorable photos by analyzing factors like blur and exposure. This can help in filtering out utility images, such as screenshots or photos of receipts, which are not particularly memorable.

For more detailed information, you can refer to the chapter markers in the session Discover Swift enhancements in the Vision framework:

Introduction: 0
New Vision API: 67
Get started with Vision: 107
Optimize with Swift Concurrency: 539
Update an existing Vision app: 665
What’s new in Vision?: 826

Additionally, if you are working with HDR images, the session Use HDR for dynamic image experiences in your app covers the full HDR pipeline, including reading, editing, displaying, and writing HDR images. This session provides strategies for handling HDR images to ensure they look great across different displays and environments.

For more information on these topics, you can explore the respective sessions and their chapters.

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