js如何添加文字干扰码防止ocr文字识别？
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可添加背景杂质和文字扭曲变形，效果如下：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Text Anti-OCR</title>
<style>
.anti-ocr-canvas {
background-color: #f0f0f0;
border: 1px solid #ccc;
}
</style>
</head>
<body>
<canvas id="anti-ocr-canvas" width="400" height="100"></canvas>
<script>
function drawTextToCanvas(text, canvasId) {
let canvas = document.getElementById(canvasId);
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by thinkfuture
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