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人工智能Java SDK:文字识别(OCR)工具箱

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文字识别(OCR)工具箱

文字识别(OCR)目前在多个行业中得到了广泛应用,比如金融行业的单据识别输入,餐饮行业中的发票识别,
交通领域的车票识别,企业中各种表单识别,以及日常工作生活中常用的身份证,驾驶证,护照识别等等。
OCR(文字识别)是目前常用的一种AI能力。

OCR工具箱功能:

  1. 方向检测
  • 0度
  • 90度
  • 180度
  • 270度
    detect_direction
  1. 图片旋转

  2. 文字识别(提供三个模型)

  • mobile模型
  • light模型
  • 服务器端模型
  1. 版面分析(支持5个类别, 用于配合文字识别,表格识别的流水线处理)
  • Text
  • Title
  • List
  • Table
  • Figure
  1. 表格识别
  • 生成html表格
  • 生成excel文件

运行OCR识别例子

1.1 文字方向检测:

  • 例子代码: OcrDetectionExample.java
  • 运行成功后,命令行应该看到下面的信息:
[INFO ] - Result image has been saved in: build/output/detect_result.png
[INFO ] - [
	class: "0", probability: 1.00000, bounds: [x=0.073, y=0.069, width=0.275, height=0.026]
	class: "0", probability: 1.00000, bounds: [x=0.652, y=0.158, width=0.222, height=0.040]
	class: "0", probability: 1.00000, bounds: [x=0.143, y=0.252, width=0.144, height=0.026]
	class: "0", probability: 1.00000, bounds: [x=0.628, y=0.328, width=0.168, height=0.026]
	class: "0", probability: 1.00000, bounds: [x=0.064, y=0.330, width=0.450, height=0.023]
]
  • 输出图片效果如下:
    detect_result

1.2 文字方向检测帮助类(增加置信度信息显示,便于调试):

  • 例子代码: OcrDetectionHelperExample.java
  • 运行成功后,命令行应该看到下面的信息:
[INFO ] - Result image has been saved in: build/output/detect_result_helper.png
[INFO ] - [
	class: "0 :1.0", probability: 1.00000, bounds: [x=0.073, y=0.069, width=0.275, height=0.026]
	class: "0 :1.0", probability: 1.00000, bounds: [x=0.652, y=0.158, width=0.222, height=0.040]
	class: "0 :1.0", probability: 1.00000, bounds: [x=0.143, y=0.252, width=0.144, height=0.026]
	class: "0 :1.0", probability: 1.00000, bounds: [x=0.628, y=0.328, width=0.168, height=0.026]
	class: "0 :1.0", probability: 1.00000, bounds: [x=0.064, y=0.330, width=0.450, height=0.023]
]
  • 输出图片效果如下:
    detect_result_helper

2. 图片旋转:

每调用一次rotateImg方法,会使图片逆时针旋转90度。

  • 例子代码: RotationExample.java
  • 旋转前图片:
    ticket_0
  • 旋转后图片效果如下:
    rotate_result

3. 文字识别:

再使用本方法前,请调用上述方法使图片文字呈水平(0度)方向。

  • 例子代码: LightOcrRecognitionExample.java
  • 运行成功后,命令行应该看到下面的信息:
[INFO ] - [
	class: "你", probability: -1.0e+00, bounds: [x=0.319, y=0.164, width=0.050, height=0.057]
	class: "永远都", probability: -1.0e+00, bounds: [x=0.329, y=0.349, width=0.206, height=0.044]
	class: "无法叫醒一个", probability: -1.0e+00, bounds: [x=0.328, y=0.526, width=0.461, height=0.044]
	class: "装睡的人", probability: -1.0e+00, bounds: [x=0.330, y=0.708, width=0.294, height=0.043]
]
  • 输出图片效果如下:
    ocr_result

4. 版面分析:

  • 运行成功后,命令行应该看到下面的信息:
[INFO ] - [
	class: "Text", probability: 0.98750, bounds: [x=0.081, y=0.620, width=0.388, height=0.183]
	class: "Text", probability: 0.98698, bounds: [x=0.503, y=0.464, width=0.388, height=0.167]
	class: "Text", probability: 0.98333, bounds: [x=0.081, y=0.465, width=0.387, height=0.121]
	class: "Figure", probability: 0.97186, bounds: [x=0.074, y=0.091, width=0.815, height=0.304]
	class: "Table", probability: 0.96995, bounds: [x=0.506, y=0.712, width=0.382, height=0.143]
]
  • 输出图片效果如下:
    layout

5. 表格识别:

  • 运行成功后,命令行应该看到下面的信息:
<html>
 <body>
  <table>
   <thead>
    <tr>
     <td>Methods</td>
     <td>R</td>
     <td>P</td>
     <td>F</td>
     <td>FPS</td>
    </tr>
   </thead>
   <tbody>
    <tr>
     <td>SegLink[26]</td>
     <td>70.0</td>
     <td>86.0</td>
     <td>770</td>
     <td>89</td>
    </tr>
    <tr>
     <td>PixelLink[4j</td>
     <td>73.2</td>
     <td>83.0</td>
     <td>77.8</td>
     <td></td>
    </tr>
...
   </tbody>
  </table> 
 </body>
</html>
  • 输出图片效果如下:
    table

  • 生成excel效果如下:
    excel

目录:

http://www.aias.top/

Git地址:

https://github.com/mymagicpower/AIAS
https://gitee.com/mymagicpower/AIAS

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