All Type Code Reading

## All Type Code Reading

Identify barcode information in a specified area of the image.

## Module Principle
This module implements the positioning and decoding process for both 1D and 2D codes.

### Algorithm Workflow
1. Locate the accurate area of the barcode in the image according to the generation rules of the selected barcode type.
2. Decode and correct errors based on the characteristics of the code.
3. Output the decoded string.

## Usage Scenarios
The barcode recognition module is used to locate and identify barcodes within a specified area. It tolerates the target barcode being rotated at any angle and having a certain amount of tilt. This module is commonly used in scenarios such as logistics code reading, product labeling, and part coding.

### Pre-Sequence Modules
The pre-sequence module for this module is generally Camera Image Acquisition or Image Preprocessing modules.

## Parameter Configuration Description
### Barcode Type:
* All: Automatically infer the barcode type based on the code information.
* OneD: All types of 1D codes supporting GS1 link syntax.
* QR Code: A quick response matrix code characterized by square patterns in three corners.
* Code 39: A highly reliable alphanumeric barcode.
* Code 128: An extremely high-density, highly reliable, and powerful alphanumeric barcode.
* Code 93: A high-efficiency, high-density alphanumeric barcode.
* Codabar: An early, highly readable numeric barcode.
* Interleaved 2 of 5: A product carton barcode following GS1 link syntax.
* Industrial 2 of 5: An early, simple numeric-only 1D code.
* EAN-13: The most common and core retail product identification code worldwide.
* EAN-8: A product identification code specifically for retail products with very small packaging areas.
* UPC-A: A standard barcode for retail products in North America.
* UPC-E: A zero-compressed short version of UPC-A.
* PDF417: A stacked linear 2D code, mainly used in identification and logistics fields.
* DataMatrix: A 2D matrix code characterized by two adjacent sides forming an L-shaped boundary with solid lines.
* Aztec: A matrix 2D code characterized by a bulls-eye locating pattern in the center.
* Code 39 Extended: An extended version of Code 39.
* Maxicode: A 2D code specifically for industrial and logistics transportation.
* GS1 Databar: A Databar barcode following GS1 link syntax.
* PatchCode: A special-purpose barcode not used for storing data.
* GS1 Composite: A composite barcode combining 1D and 2D codes.
* Postal Code: A barcode specifically for mail sorting.
* DotCode: A 2D code designed for industrial printing.
* MSI Code: An early, continuous numeric-only barcode.
### Single ROI Code Count:
The maximum number of barcodes to identify within a single detection area.
### Prefix Character Filter:
Filter barcode recognition results where the start character is a specified character.
### Character Count Judgment:
Judgment of the number of characters in the barcode recognition result.
### Barcode Position Filter:
* Ignore this item: Do not filter the recognition results by position.
* Topmost Barcode: Only keep the barcode in the topmost position among recognition results.
* Bottommost Barcode: Only keep the barcode in the bottommost position among recognition results.
* Leftmost Barcode: Only keep the barcode in the leftmost position among recognition results.
* Rightmost Barcode: Only keep the barcode in the rightmost position among recognition results.
### Reading Level:
* Speed: Identify using speed mode parameters.
* Standard: Identify using standard mode parameters.
* Maximum: Identify using maximum mode parameters.

![](/media/202602/全类型读码-高级参数_1770623311.png)
### Timeout
The maximum detection time for identifying barcodes.
### Software License
The authorization code from the algorithm manufacturer when using this module.
### 1D Code Center Filter
* Center X: Filter recognition results where the horizontal coordinate of the barcode center position is within this range.
* Center Y: Filter recognition results where the vertical coordinate of the barcode center position is within this range.
### Output Character on Detection Failure
The character to output when no barcode is identified.
### Display Center Information
Display the center coordinates of all identified barcodes to facilitate the viewing of center filtering.

![](/media/202602/全类型读码-显示设置_1770623450.png)
### Display Settings
Set ROI, reading area, and barcode information display related parameters.

![](/media/202602/位置调整_1770106939.png)
### Position Adjustment
Manually adjust ROI related parameters.

### ROI Type
* Rotated Rectangle: A rectangle that can be moved, resized, and rotated. Its angle range is any value from 0 to 360 degrees.
### ROI Mode
* Single ROI: There is only one barcode recognition detection area.
* Array ROI: Supports multiple barcode recognition areas.
### ROI Source
* Manual ROI: In this mode, this module can directly set ROI related parameters.
* Reference ROI: In this mode, this module cannot modify ROI related parameters and can only introduce them from the module above.
### Position Correction
* Disable: Do not adjust the position of the set ROI.
* Pose Correction: Adjust the position of the set ROI based on the input value.

## Output Description
### Run Result
Whether the barcode recognition was successful.
### 1D Code Count
The number of barcodes identified.
### Character Count
The number of characters in the identified barcode result.
### Character Output
The identified barcode result.
### Barcode Type
The type of barcode identified.
### 1D Code Region Array
The image region where the identified barcode is located.
### ROI Count
The number of ROIs.
### ROI Status Array
Whether each ROI identified a barcode.

## Precautions
1. When using this module, please place dynamsoft_c_package.dll and DynamsoftBarcodeReaderx64.dll and other library files from Dynamsoft software into the software release package, and then reopen the software to use it.
2. This module can only be used on Windows 10 or higher versions of the operating system.

---

Click here to jump to the corresponding Chinese manual page: [All Type Code Reading](/doc/154)