Media Vision
You can perceive and understand an image or to extract information from images in your application.
This feature is supported in mobile applications only.
The main features of Media Vision API include:
- Handling images
You can handle images by creating a source handle and filling it from an image buffer or media packet. Create the source handle with the mv_create_source() function, and fill it with the mv_source_fill_by_buffer() or mv_source_fill_by_media_packet() function.
- Detecting barcodes
You can detect barcodes in an image or from camera preview streams, and then decrypt them to display messages to the user.
Before detecting a barcode, you must define the barcode detection target attribute value:
- Detect both 1D and 2D barcodes
- Detect 1D barcodes only
- Detect 2D barcodes only
- Generating barcodes
You can encrypt a given message, generate a barcode from it, and save it in a memory or as a file.
Before generating a barcode, you must define the barcode text generation attribute value:
- Generate barcode without an input message
- Generate barcode with an input message (supports only 1D barcodes)
You must also define the following specifications:
- Barcode type
- QR code specification (if the QA code barcode type is used)
- Image format (if the barcode is saved as a file)
- JPEG
- BMP
- PNG
The following tables provides more information about the barcode generation specifications.
| 1D or 2D | Type | Description | Example |
|---|---|---|---|
| 1-D | UPC-A | Universal product code with numeric 12-digit |
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| UPC-E | Universal product code with numeric 6-digit |
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| EAN-8 | International article number with numeric 8-digit |
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| EAN-13 | International article number with numeric 13-digit |
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| CODE-128 | Code 128; supports alphanumeric or numeric-only |
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| CODE-39 | Code 39; supports 34 characters consisting of uppercase letters (A to Z), numeric digits (0 to 9), and special characters(-, ., $, /, %, space) |
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| INTERLEAVED 2 of 5 | Interleaved two of five with numeric digits |
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| 2-D | QR code | Quick Response code |
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| Specification | Support type | Description |
|---|---|---|
| Error Correction Code (ECC) Level | ECC Low | Recovery up to 7% damage |
| ECC Medium | Recovery up to 15% damage | |
| ECC Quartile | Recovery up 25% damage | |
| ECC High | Recovery up to 30% damage | |
| Encoding mode | Numeric | Numeric digits ('0', '1', ..., '9') |
| Alphanumeric | Alphanumeric characters: numeric (0, 1, ..., 9), characters (A, B, ..., Z), and punctuation (' ', $, %, *, +, -, '.', /, ':') | |
| Byte 8-bit | Raw 8-bit bytes | |
| UTF-8 | Universal character set and Transformation Format 8-bit, encoding characters |
