Azure OCR [打印文本] 未按正确顺序读取收据行

Question

应用目标：读取收据图像，提取商店/组织名称以及支付的总金额。将其输入网络表单以进行自动填写和提交。

发布请求 - "https://*.cognitiveservices.azure.com/vision/v2.0/recognizeText?{params}

获取请求 - https://*.cognitiveservices.azure.com/vision/v2.0/textOperations/{operationId}

但是，当我返回结果时，有时会在行排序中混淆（见下图 [JSON 响应中的类似结果]）

这种混合导致总金额为 0.88 美元

9 份测试收据中有 2 份存在类似情况。

问：为什么它适用于类似和不同的结构化收据，但由于某种原因并非对所有人都一致？另外，任何想法如何解决它？

Answer 1

我快速浏览了您的案例。

OCR 结果

正如您所提到的，结果并没有像您想象的那样排序。我快速查看了边界框的值，但我不知道它们是如何排序的。您可以尝试在此基础上整合字段，但有一项服务已经在为您做这件事。

表单识别器：

使用表单识别器和您的图片，我得到了以下收据结果。

如下所示，understandingResults 包含 total 及其值（“value”：9.11）、MerchantName（“Chick-fil-a”）和其他字段。

{
    "status": "Succeeded",
    "recognitionResults": [
        {
            "page": 1,
            "clockwiseOrientation": 0.17,
            "width": 404,
            "height": 1226,
            "unit": "pixel",
            "lines": [
                {
                    "boundingBox": [
                        108,
                        55,
                        297,
                        56,
                        296,
                        71,
                        107,
                        70
                    ],
                    "text": "Welcome to Chick-fil-a",
                    "words": [
                        {
                            "boundingBox": [
                                108,
                                56,
                                169,
                                56,
                                169,
                                71,
                                108,
                                71
                            ],
                            "text": "Welcome",
                            "confidence": "Low"
                        },
                        {
                            "boundingBox": [
                                177,
                                56,
                                194,
                                56,
                                194,
                                71,
                                177,
                                71
                            ],
                            "text": "to"
                        },
                        {
                            "boundingBox": [
                                201,
                                56,
                                296,
                                57,
                                296,
                                71,
                                201,
                                71
                            ],
                            "text": "Chick-fil-a"
                        }
                    ]
                },
...
OTHER LINES CUT FOR DISPLAY
...
            ]
        }
    ],
    "understandingResults": [
        {
            "pages": [
                1
            ],
            "fields": {
                "Subtotal": null,
                "Total": {
                    "valueType": "numberValue",
                    "value": 9.11,
                    "text": "$9.11",
                    "elements": [
                        {
                            "$ref": "#/recognitionResults/0/lines/32/words/0"
                        },
                        {
                            "$ref": "#/recognitionResults/0/lines/32/words/1"
                        }
                    ]
                },
                "Tax": {
                    "valueType": "numberValue",
                    "value": 0.88,
                    "text": "$0.88",
                    "elements": [
                        {
                            "$ref": "#/recognitionResults/0/lines/31/words/0"
                        },
                        {
                            "$ref": "#/recognitionResults/0/lines/31/words/1"
                        },
                        {
                            "$ref": "#/recognitionResults/0/lines/31/words/2"
                        }
                    ]
                },
                "MerchantAddress": null,
                "MerchantName": {
                    "valueType": "stringValue",
                    "value": "Chick-fil-a",
                    "text": "Chick-fil-a",
                    "elements": [
                        {
                            "$ref": "#/recognitionResults/0/lines/0/words/2"
                        }
                    ]
                },
                "MerchantPhoneNumber": {
                    "valueType": "stringValue",
                    "value": "+13092689500",
                    "text": "309-268-9500",
                    "elements": [
                        {
                            "$ref": "#/recognitionResults/0/lines/4/words/0"
                        }
                    ]
                },
                "TransactionDate": {
                    "valueType": "stringValue",
                    "value": "2019-06-21",
                    "text": "6/21/2019",
                    "elements": [
                        {
                            "$ref": "#/recognitionResults/0/lines/6/words/0"
                        }
                    ]
                },
                "TransactionTime": {
                    "valueType": "stringValue",
                    "value": "13:00:57",
                    "text": "1:00:57 PM",
                    "elements": [
                        {
                            "$ref": "#/recognitionResults/0/lines/6/words/1"
                        },
                        {
                            "$ref": "#/recognitionResults/0/lines/6/words/2"
                        }
                    ]
                }
            }
        }
    ]
}

有关表单识别器的更多详细信息：https://azure.microsoft.com/en-us/services/cognitive-services/form-recognizer/