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<!DOCTYPE html>
<html lang="zh-cn">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>批量发票图片识别导出 Excel</title>
<script src="https://cdn.jsdelivr.net/npm/jsqr@1.4.0/dist/jsQR.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/blueimp-load-image@5.16.0/js/load-image.all.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/tesseract.js@4/dist/tesseract.min.js"></script>
<script src="https://cdn.sheetjs.com/xlsx-0.20.0/package/dist/xlsx.mini.min.js"></script>
<style>
table,
th,
td {
border: 1px solid black;
border-collapse: collapse;
}
#invoice-table thead {
position: sticky;
top: 0;
z-index: 1;
background-color: lightGray;
}
#invoice-table-container {
margin-top: 10px;
max-width: max-content;
max-height: 500px;
overflow: auto;
}
</style>
</head>
<body>
<input
type="file"
id="invoice-input"
accept="image/png, image/jpeg"
multiple
title="选择需要识别的发票图片"
/>
<button id="parse-btn" title="开始识别所有图片">识别</button>
<button id="export-btn" title="导出Excel的XLXS文件">导出Excel</button>
<button id="clear-btn" title="清除已经识别的数据">清除</button>
<button id="reset-btn" title="重启应用">重置</button>
<p id="progress-text"></p>
<div id="invoice-table-container">
<table id="invoice-table"></table>
</div>
<script>
async function initTesseract() {
globalThis.ocrWorker = await Tesseract.createWorker({
langPath:
"https://cdn.jsdelivr.net/gh/naptha/tessdata@gh-pages/4.0.0/",
//logger: (m) => console.log(m),
});
await ocrWorker.loadLanguage("chi_sim");
await ocrWorker.initialize("chi_sim");
}
async function init() {
console.debug("Initializing...");
globalThis.progressText = document.getElementById("progress-text");
updateProgressText("初始化中...");
globalThis.invoiceInput = document.getElementById("invoice-input");
globalThis.invoiceTable = document.getElementById("invoice-table");
globalThis.parseButton = document.getElementById("parse-btn");
globalThis.exportButton = document.getElementById("export-btn");
globalThis.clearButton = document.getElementById("clear-btn");
globalThis.resetButton = document.getElementById("reset-btn");
globalThis.resetButton.disabled = true;
globalThis.clearButton.disabled = true;
globalThis.invoiceInput.disabled = true;
globalThis.parseButton.disabled = true;
globalThis.exportButton.disabled = true;
await initTesseract();
updateProgressText("初始化完成！");
globalThis.invoiceInput.disabled = false;
globalThis.clearButton.disabled = false;
globalThis.resetButton.disabled = false;
console.debug("Initialized");
}
async function reset() {
// https://github.com/naptha/tesseract.js/blob/master/docs/faq.md#how-does-tesseractjs-download-and-keep-traineddata
const store = "keyval-store";
await globalThis.ocrWorker.terminate();
const del = window.indexedDB.deleteDatabase(store);
del.onerror = (e) => {
alert("重置失败");
};
del.onsuccess = (e) => {
alert("重置成功，即将刷新页面");
location.reload();
};
}
function parseInvoiceQRcodeData(canvas) {
const data = {};
try {
let ctx = canvas.getContext("2d");
let imgData = ctx.getImageData(0, 0, canvas.width, canvas.height);
let code = jsQR(imgData.data, canvas.width, canvas.height);
console.debug("Parsed QR code data: ", code);
let arrayData = code.data.split(",");
data.code = arrayData[2];
data.num = arrayData[3];
data.amount = arrayData[4];
data.date = arrayData[5];
data.check = arrayData[6];
return data;
} catch (e) {
console.error(e);
throw new Error("二维码识别失败");
}
}
async function parseInvoiceTextData(canvas) {
// TODO: support multi-regexp to capitable with accuracy problem of OCR
const AMOUNT_REGEX = /价\s*税\s*合\s*计.*?\D(\d+(?:\.\d{2})?)\n$/;
const data = {};
try {
const res = await globalThis.ocrWorker.recognize(canvas);
console.debug("Parsed text data: ", res);
const lines = res.data.lines;
// search lines in reverse order
for (let i = lines.length - 1; i >= 0; i--) {
const regRes = AMOUNT_REGEX.exec(lines[i].text);
if (regRes) {
data.amount = regRes[1];
break;
}
}
return data;
} catch (e) {
console.error(e);
throw new Error("文本识别失败");
}
}
async function parseImageInvoiceData(file) {
const data = {
qrCodeData: [],
textData: {},
status: 0,
msg: null,
};
try {
const img = await loadImage(file, { canvas: true });
const canvas = img.image;
data.qrCodeData = parseInvoiceQRcodeData(canvas);
data.textData = await parseInvoiceTextData(canvas);
// TODO: compare qrCodeData and textData to improve accuracy
data.status = 1;
} catch (e) {
console.error(e);
data.msg = e.message;
} finally {
return data;
}
}
async function parseInvoiceData(file) {
const { qrCodeData, textData, status, msg } =
await parseImageInvoiceData(file);
return {
code: qrCodeData.code,
num: qrCodeData.num,
date: qrCodeData.date,
amount: textData.amount,
status: status,
msg: msg,
};
}
async function renderTableRowData(rowData) {
const tr = document.createElement("tr");
const header = globalThis.invoiceTable.rows[0];
console.debug(`Rendering table row`, rowData);
Array.from(header.children).forEach((th) => {
let name = th.getAttribute("data-name");
let id = th.getAttribute("data-id");
let type = th.getAttribute("data-type");
let value = th.getAttribute("data-value") || rowData[id];
let format = th.getAttribute("data-format");
let td = document.createElement("td");
console.debug("Rendering table row column:", name, value);
type ? td.setAttribute("data-t", type) : null;
format ? td.setAttribute("data-z", format) : null;
td.textContent = value;
tr.appendChild(td);
});
globalThis.invoiceTable.appendChild(tr);
}
function clearTable() {
globalThis.invoiceTable.innerHTML = "";
}
async function renderTableHeader(headerData) {
const defaultHeaderData = [
{
name: "发票代码",
id: "code",
type: "s",
value: null,
format: null,
},
{
name: "发票号码",
id: "num",
type: "s",
value: null,
format: null,
},
{
name: "开票日期",
id: "date",
type: "s",
value: null,
format: null,
},
{
name: "价税合计",
id: "amount",
type: "n",
value: null,
format: null,
},
{
name: "文件名",
id: "file",
type: "s",
value: null,
format: null,
},
{
name: "状态",
id: "status",
type: "s",
value: null,
format: null,
},
{
name: "备注",
id: "msg",
type: "s",
value: null,
format: null,
},
];
headerData = headerData || defaultHeaderData;
clearTable();
console.debug("Rendering table header");
const thead = document.createElement("thead");
const tr = document.createElement("tr");
headerData.forEach((h, i) => {
console.debug("Rendering table header column:", h.name);
let th = document.createElement("th");
Object.entries(h).forEach(([k, v]) => {
v ? th.setAttribute(`data-${k}`, v) : null;
});
th.textContent = h.name;
tr.appendChild(th);
});
thead.appendChild(tr);
globalThis.invoiceTable.appendChild(thead);
}
function updateProgressText(text) {
globalThis.progressText.textContent = text;
}
async function parse() {
console.debug("Parsing...");
const invoiceFiles = globalThis.invoiceInput.files;
renderTableHeader();
for (let i = 0; i < invoiceFiles.length; i++) {
let f = invoiceFiles[i];
updateProgressText(
`正在识别第${i + 1}个图片...， 还剩下${
invoiceFiles.length - (i + 1)
}个`
);
console.debug(`Parsing ${f.name}`);
let data = await parseInvoiceData(f);
data["order"] = i + 1;
data["file"] = f.name;
renderTableRowData(data);
}
updateProgressText(`识别完成！共${invoiceFiles.length}个图片`);
console.debug("Parsed!");
}
function exportInvoiceXLSX() {
updateProgressText("正在导出...");
time = new Date()
.toISOString()
.split(".")[0]
.replaceAll("-", "")
.replaceAll(":", "")
.replace("T", "_");
fileName = `invoice_${time}.xlsx`;
console.debug("Exporting to XLSX", fileName);
let worksheet = XLSX.utils.table_to_book(
document.getElementById("invoice-table")
);
XLSX.writeFile(worksheet, `invoice_${time}.xlsx`);
updateProgressText(`已导出Excel文件：${fileName}`);
console.debug("Exported!");
}
function updateParseButtonState() {
if (globalThis.invoiceInput.files.length == 0) {
globalThis.parseButton.disabled = true;
} else {
globalThis.parseButton.disabled = false;
}
}
addEventListener("load", async (e) => {
await init();
globalThis.invoiceInput.addEventListener("change", (e) => {
updateParseButtonState();
updateProgressText(`已选择${e.target.files.length}张发票`);
});
globalThis.parseButton.addEventListener("click", async (e) => {
try {
e.target.disabled = true;
e.target.textContent = "识别中...";
globalThis.invoiceInput.disabled = true;
globalThis.clearButton.disabled = true;
globalThis.exportButton.disabled = true;
await parse();
globalThis.exportButton.disabled = false;
} finally {
e.target.textContent = "识别";
updateParseButtonState();
globalThis.clearButton.disabled = false;
globalThis.invoiceInput.disabled = false;
}
});
globalThis.exportButton.addEventListener("click", (e) => {
try {
e.target.disabled = true;
globalThis.invoiceInput.disabled = true;
globalThis.parseButton.disabled = true;
globalThis.clearButton.disabled = true;
exportInvoiceXLSX();
} finally {
e.target.disabled = false;
globalThis.parseButton.disabled = false;
globalThis.clearButton.disabled = false;
globalThis.invoiceInput.disabled = false;
}
});
globalThis.clearButton.addEventListener("click", (e) => {
clearTable();
globalThis.exportButton.disabled = true;
globalThis.invoiceInput.value = null;
globalThis.invoiceInput.dispatchEvent(new Event("change"));
});
globalThis.resetButton.addEventListener("click", async (e) => {
await reset();
});
});
</script>
</body>
</html>