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1
luiscla27
5 年前
从AWS Textract检索到的数据并不完全是图像。
最简单的说法是,它们是公认的文本块,如上所述
at their webpage
:
Amazon Textract使添加文档文本检测和
分析你的应用程序。Amazon Textract文本检测API
可以检测各种文档中的键入和手写文本
包括财务报告、医疗记录和税务表格。对于
有结构化数据的文档,可以使用Amazon Textract
用于提取文本、表单和表格的文档分析API。此外
如果要处理发票和收据,可以使用
AnalyzeAPI。
这些块是文本检测操作的结果。块表示文档中彼此接近的一组像素中可识别的项目(
see more here
).它们只代表您发送到API的输入的内容。
我制作了以下片段,它符合你的要求。然而,从API收集的响应是为了满足您的实现需求;而且可能不是以下方式:
var data = [{
"BlockType": "WORD",
"Confidence": 99.93840789794922,
"Text": "The",
"TextType": "PRINTED",
"Geometry": {
"BoundingBox": {
"Width": 0.036412131041288376,
"Height": 0.014151308685541153,
"Left": 0.13431107997894287,
"Top": 0.03131059184670448
},
"Polygon": [
{
"X": 0.13431107997894287,
"Y": 0.03131059184670448
},
{
"X": 0.17072321474552155,
"Y": 0.03131059184670448
},
{
"X": 0.17072321474552155,
"Y": 0.045461900532245636
},
{
"X": 0.13431107997894287,
"Y": 0.045461900532245636
}
]
},
"Id": "da6d85a6-3c79-484b-a07d-d84e968844ae",
"Page": 1,
"SearchKey": "The"
},
{
"BlockType": "WORD",
"Confidence": 99.77457427978516,
"Text": "Standard",
"TextType": "PRINTED",
"Geometry": {
"BoundingBox": {
"Width": 0.08427372574806213,
"Height": 0.013822372071444988,
"Left": 0.17733719944953918,
"Top": 0.03183155879378319
},
"Polygon": [
{
"X": 0.17733719944953918,
"Y": 0.03183155879378319
},
{
"X": 0.2616109251976013,
"Y": 0.03183155879378319
},
{
"X": 0.2616109251976013,
"Y": 0.04565393179655075
},
{
"X": 0.17733719944953918,
"Y": 0.04565393179655075
}
]
},
"Id": "e6587cca-2e7e-4231-9978-4b303241645b",
"Page": 1,
"SearchKey": "Standard"
},
{
"BlockType": "WORD",
"Confidence": 99.82964324951172,
"Text": "Bill",
"TextType": "PRINTED",
"Geometry": {
"BoundingBox": {
"Width": 0.035674601793289185,
"Height": 0.014618489891290665,
"Left": 0.26750874519348145,
"Top": 0.03160806745290756
},
"Polygon": [
{
"X": 0.26750874519348145,
"Y": 0.03160806745290756
},
{
"X": 0.30318334698677063,
"Y": 0.03160806745290756
},
{
"X": 0.30318334698677063,
"Y": 0.04622655734419823
},
{
"X": 0.26750874519348145,
"Y": 0.04622655734419823
}
]
},
"Id": "a6947531-ae08-40b3-8161-8fa78d430ad4",
"Page": 1,
"SearchKey": "Bill"
},
{
"BlockType": "WORD",
"Confidence": 99.97029876708984,
"Text": "of",
"TextType": "PRINTED",
"Geometry": {
"BoundingBox": {
"Width": 0.022517522796988487,
"Height": 0.014790677465498447,
"Left": 0.3098187744617462,
"Top": 0.03196505829691887
},
"Polygon": [
{
"X": 0.3098187744617462,
"Y": 0.03196505829691887
},
{
"X": 0.33233630657196045,
"Y": 0.03196505829691887
},
{
"X": 0.33233630657196045,
"Y": 0.04675573855638504
},
{
"X": 0.3098187744617462,
"Y": 0.04675573855638504
}
]
},
"Id": "53853140-e3c4-4f3a-a4b7-67ad39e1bb32",
"Page": 1,
"SearchKey": "of"
},
{
"BlockType": "WORD",
"Confidence": 99.88966369628906,
"Text": "Lading",
"TextType": "PRINTED",
"Geometry": {
"BoundingBox": {
"Width": 0.06747607886791229,
"Height": 0.01772529073059559,
"Left": 0.3355117440223694,
"Top": 0.032798975706100464
},
"Polygon": [
{
"X": 0.3355117440223694,
"Y": 0.032798975706100464
},
{
"X": 0.40298783779144287,
"Y": 0.032798975706100464
},
{
"X": 0.40298783779144287,
"Y": 0.0505242682993412
},
{
"X": 0.3355117440223694,
"Y": 0.0505242682993412
}
]
},
"Id": "5060d908-2318-48ad-bd6c-e4694501a8ce",
"Page": 1,
"SearchKey": "Lading"
},
{
"BlockType": "WORD",
"Confidence": 99.94490814208984,
"Text": "Form",
"TextType": "PRINTED",
"Geometry": {
"BoundingBox": {
"Width": 0.051753073930740356,
"Height": 0.014337458647787571,
"Left": 0.4095679521560669,
"Top": 0.033189330250024796
},
"Polygon": [
{
"X": 0.4095679521560669,
"Y": 0.033189330250024796
},
{
"X": 0.46132102608680725,
"Y": 0.033189330250024796
},
{
"X": 0.46132102608680725,
"Y": 0.04752678796648979
},
{
"X": 0.4095679521560669,
"Y": 0.04752678796648979
}
]
},
"Id": "3cf3fb15-e77f-48a5-bf76-be35d32f8be6",
"Page": 1,
"SearchKey": "Form"
},
{
"BlockType": "WORD",
"Confidence": 99.93840789794922,
"Text": "The",
"TextType": "PRINTED",
"Geometry": {
"BoundingBox": {
"Width": 0.036412131041288376,
"Height": 0.014151308685541153,
"Left": 0.13431107997894287,
"Top": 0.03131059184670448
},
"Polygon": [
{
"X": 0.13431107997894287,
"Y": 0.03131059184670448
},
{
"X": 0.17072321474552155,
"Y": 0.03131059184670448
},
{
"X": 0.17072321474552155,
"Y": 0.045461900532245636
},
{
"X": 0.13431107997894287,
"Y": 0.045461900532245636
}
]
},
"Id": "da6d85a6-3c79-484b-a07d-d84e968844ae",
"Page": 1,
"SearchKey": "The"
},
{
"BlockType": "WORD",
"Confidence": 99.77457427978516,
"Text": "Standard",
"TextType": "PRINTED",
"Geometry": {
"BoundingBox": {
"Width": 0.08427372574806213,
"Height": 0.013822372071444988,
"Left": 0.17733719944953918,
"Top": 0.03183155879378319
},
"Polygon": [
{
"X": 0.17733719944953918,
"Y": 0.03183155879378319
},
{
"X": 0.2616109251976013,
"Y": 0.03183155879378319
},
{
"X": 0.2616109251976013,
"Y": 0.04565393179655075
},
{
"X": 0.17733719944953918,
"Y": 0.04565393179655075
}
]
},
"Id": "e6587cca-2e7e-4231-9978-4b303241645b",
"Page": 1,
"SearchKey": "Standard"
},
{
"BlockType": "WORD",
"Confidence": 99.82964324951172,
"Text": "Bill",
"TextType": "PRINTED",
"Geometry": {
"BoundingBox": {
"Width": 0.035674601793289185,
"Height": 0.014618489891290665,
"Left": 0.26750874519348145,
"Top": 0.03160806745290756
},
"Polygon": [
{
"X": 0.26750874519348145,
"Y": 0.03160806745290756
},
{
"X": 0.30318334698677063,
"Y": 0.03160806745290756
},
{
"X": 0.30318334698677063,
"Y": 0.04622655734419823
},
{
"X": 0.26750874519348145,
"Y": 0.04622655734419823
}
]
},
"Id": "a6947531-ae08-40b3-8161-8fa78d430ad4",
"Page": 1,
"SearchKey": "Bill"
},
{
"BlockType": "WORD",
"Confidence": 99.97029876708984,
"Text": "of",
"TextType": "PRINTED",
"Geometry": {
"BoundingBox": {
"Width": 0.022517522796988487,
"Height": 0.014790677465498447,
"Left": 0.3098187744617462,
"Top": 0.03196505829691887
},
"Polygon": [
{
"X": 0.3098187744617462,
"Y": 0.03196505829691887
},
{
"X": 0.33233630657196045,
"Y": 0.03196505829691887
},
{
"X": 0.33233630657196045,
"Y": 0.04675573855638504
},
{
"X": 0.3098187744617462,
"Y": 0.04675573855638504
}
]
},
"Id": "53853140-e3c4-4f3a-a4b7-67ad39e1bb32",
"Page": 1,
"SearchKey": "of"
},
{
"BlockType": "WORD",
"Confidence": 99.88966369628906,
"Text": "Lading",
"TextType": "PRINTED",
"Geometry": {
"BoundingBox": {
"Width": 0.06747607886791229,
"Height": 0.01772529073059559,
"Left": 0.3355117440223694,
"Top": 0.032798975706100464
},
"Polygon": [
{
"X": 0.3355117440223694,
"Y": 0.032798975706100464
},
{
"X": 0.40298783779144287,
"Y": 0.032798975706100464
},
{
"X": 0.40298783779144287,
"Y": 0.0505242682993412
},
{
"X": 0.3355117440223694,
"Y": 0.0505242682993412
}
]
},
"Id": "5060d908-2318-48ad-bd6c-e4694501a8ce",
"Page": 1,
"SearchKey": "Lading"
},
{
"BlockType": "WORD",
"Confidence": 99.94490814208984,
"Text": "Form",
"TextType": "PRINTED",
"Geometry": {
"BoundingBox": {
"Width": 0.051753073930740356,
"Height": 0.014337458647787571,
"Left": 0.4095679521560669,
"Top": 0.033189330250024796
},
"Polygon": [
{
"X": 0.4095679521560669,
"Y": 0.033189330250024796
},
{
"X": 0.46132102608680725,
"Y": 0.033189330250024796
},
{
"X": 0.46132102608680725,
"Y": 0.04752678796648979
},
{
"X": 0.4095679521560669,
"Y": 0.04752678796648979
}
]
},
"Id": "3cf3fb15-e77f-48a5-bf76-be35d32f8be6",
"Page": 1,
"SearchKey": "Form"
}
];
const zoom = 1400;
const canvas = document.getElementById('canvas');
const ctx = canvas.getContext('2d');
const drawer = {
BoundingBox: drawBoundingBox,
Polygon: drawPolygon,
};
ctx.strokeStyle = "#0000ff";
ctx.lineWidth = 1;
data.forEach((args) => {
if (args.Geometry) {
for (var key in args.Geometry) {
if (typeof drawer[key] === 'function') {
drawer[key](args.Geometry[key], args.Text);
} else {
console.error('Unsupported object, you\'ll need to add support here!');
}
}
}
});
function drawBoundingBox(args, text) {
ctx.beginPath();
ctx.rect(args.Left * zoom, args.Top * zoom, args.Width * zoom, args.Height * zoom);
ctx.stroke();
ctx.font = (args.Height * zoom) + "px Arial";
ctx.fillText(text, (args.Left * zoom), (args.Top * zoom) + (args.Height * zoom));
}
function drawPolygon(args, text) {
ctx.beginPath();
ctx.moveTo(args[0].X * zoom, args[0].Y * zoom);
for (var i = 1; i < args.length; i++) {
ctx.lineTo(args[i].X * zoom, args[i].Y * zoom);
}
ctx.lineTo(args[0].X * zoom, args[0].Y * zoom);
ctx.stroke();
const h = ((args[args.length - 1].Y - args[0].Y) * zoom);
ctx.font = h + "px Arial";
ctx.strokeText(text, args[0].X * zoom, (args[0].Y + h) * zoom);
}
<canvas width="850" height="450" id="canvas"></canvas>
帆布画
以下是您使用代码片段提供的示例JSON数据的输出:
帆布画没那么难。要编写我分享给你的代码片段,你只需要3个主题的知识(
Text
,
Rect
和
lineTo
)
剑道角画
我已经把普通代码移植到剑道角画中了
this stackblitz sample
,我想让你知道香草比剑道更容易使用,以下是输出:
在这两种情况下,画布和剑道;我不得不添加一个
zoom
因为你的
X, Y
值太小。
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