pic-generate

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>图片色卡提取工具</title>
    <script src="https://cdn.tailwindcss.com"></script>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
    <style>
        .color-card {
            transition: all 0.3s ease;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        }
        .color-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
        }
        .color-value {
            font-family: 'Courier New', monospace;
            cursor: pointer;
        }
        .copied-message {
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        .show-copied {
            opacity: 1;
        }
        .color-preview {
            height: 120px;
            border-top-left-radius: 0.5rem;
            border-top-right-radius: 0.5rem;
        }
        #imagePreview {
            max-height: 400px;
            max-width: 100%;
            border-radius: 0.5rem;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        }
        #dropZone {
            border: 2px dashed #cbd5e0;
            transition: all 0.3s ease;
        }
        #dropZone.drag-over {
            border-color: #4299e1;
            background-color: #ebf8ff;
        }
        .progress-bar {
            height: 6px;
            background-color: #e2e8f0;
            border-radius: 3px;
            overflow: hidden;
        }
        .progress-fill {
            height: 100%;
            background-color: #4299e1;
            transition: width 0.3s ease;
        }
    </style>
</head>
<body class="bg-gray-100 min-h-screen">
    <div class="container mx-auto px-4 py-8">
        <header class="mb-8 text-center">
            <h1 class="text-4xl font-bold text-gray-800 mb-2">图片色卡提取工具</h1>
            <p class="text-gray-600 max-w-2xl mx-auto">上传图片自动提取主要颜色，生成美观的色卡</p>
        </header>

        <div class="bg-white rounded-xl shadow-md p-6 mb-8">
            <div id="dropZone" class="flex flex-col items-center justify-center p-8 rounded-lg mb-4">
                <i class="fas fa-cloud-upload-alt text-4xl text-blue-500 mb-3"></i>
                <p class="text-gray-700 mb-2">拖放图片到此处或</p>
                <label for="imageUpload" class="cursor-pointer bg-blue-500 hover:bg-blue-600 text-white px-6 py-2 rounded-lg font-medium transition-colors inline-block">
                    <i class="fas fa-folder-open mr-2"></i>选择图片
                </label>
                <input type="file" id="imageUpload" accept="image/*" class="hidden">
                <p class="text-gray-500 text-sm mt-3">支持 JPG, PNG, GIF 等格式</p>
            </div>

            <div class="flex items-center mb-4 hidden" id="progressContainer">
                <div class="progress-bar flex-1 mr-2">
                    <div class="progress-fill" id="progressFill" style="width: 0%"></div>
                </div>
                <span class="text-sm text-gray-600" id="progressText">0%</span>
            </div>

            <div class="flex flex-col md:flex-row gap-6">
                <div class="flex-1">
                    <h3 class="text-lg font-semibold mb-3 text-gray-800">图片预览</h3>
                    <div class="flex items-center justify-center bg-gray-100 rounded-lg p-4 min-h-48">
                        <img id="imagePreview" class="hidden" alt="图片预览">
                        <p id="noImageText" class="text-gray-500">图片将显示在这里</p>
                    </div>
                </div>
                <div class="flex-1">
                    <h3 class="text-lg font-semibold mb-3 text-gray-800">提取设置</h3>
                    <div class="space-y-4">
                        <div>
                            <label for="colorCount" class="block text-sm font-medium text-gray-700 mb-1">提取颜色数量</label>
                            <select id="colorCount" class="w-full border border-gray-300 rounded-lg px-3 py-2 focus:outline-none focus:ring-2 focus:ring-blue-500">
                                <option value="5">5种</option>
                                <option value="8" selected>8种</option>
                                <option value="12">12种</option>
                                <option value="16">16种</option>
                            </select>
                        </div>
                        <div>
                            <label for="algorithm" class="block text-sm font-medium text-gray-700 mb-1">提取算法</label>
                            <select id="algorithm" class="w-full border border-gray-300 rounded-lg px-3 py-2 focus:outline-none focus:ring-2 focus:ring-blue-500">
                                <option value="kmeans">K-means聚类</option>
                                <option value="medianCut" selected>中值切割</option>
                                <option value="simple">简单采样</option>
                            </select>
                        </div>
                        <div class="flex items-center">
                            <input type="checkbox" id="ignoreWhite" class="h-4 w-4 text-blue-600 focus:ring-blue-500 border-gray-300 rounded">
                            <label for="ignoreWhite" class="ml-2 block text-sm text-gray-700">忽略白色/接近白色</label>
                        </div>
                        <div class="flex items-center">
                            <input type="checkbox" id="ignoreBlack" class="h-4 w-4 text-blue-600 focus:ring-blue-500 border-gray-300 rounded">
                            <label for="ignoreBlack" class="ml-2 block text-sm text-gray-700">忽略黑色/接近黑色</label>
                        </div>
                        <button id="extractBtn" class="w-full bg-green-500 hover:bg-green-600 text-white px-4 py-2 rounded-lg font-medium transition-colors flex items-center justify-center disabled:opacity-50" disabled>
                            <i class="fas fa-palette mr-2"></i>提取颜色
                        </button>
                    </div>
                </div>
            </div>
        </div>

        <div id="resultsSection" class="hidden">
            <div class="flex justify-between items-center mb-6">
                <h2 class="text-2xl font-bold text-gray-800">提取的颜色</h2>
                <div class="flex gap-2">
                    <button id="copyAllBtn" class="bg-blue-500 hover:bg-blue-600 text-white px-4 py-2 rounded-lg flex items-center transition-colors">
                        <i class="fas fa-copy mr-2"></i>复制全部
                    </button>
                    <button id="exportBtn" class="bg-green-500 hover:bg-green-600 text-white px-4 py-2 rounded-lg flex items-center transition-colors">
                        <i class="fas fa-file-export mr-2"></i>导出色卡
                    </button>
                </div>
            </div>

            <div id="colorGrid" class="grid grid-cols-1 sm:grid-cols-2 md:grid-cols-3 lg:grid-cols-4 xl:grid-cols-5 gap-6">
                <!-- 颜色卡片将在这里生成 -->
            </div>
        </div>

        <div id="toast" class="fixed bottom-4 right-4 bg-green-500 text-white px-4 py-2 rounded-lg shadow-lg hidden">
            颜色已复制到剪贴板!
        </div>
    </div>

    <script>
        document.addEventListener('DOMContentLoaded', function() {
            const dropZone = document.getElementById('dropZone');
            const imageUpload = document.getElementById('imageUpload');
            const imagePreview = document.getElementById('imagePreview');
            const noImageText = document.getElementById('noImageText');
            const extractBtn = document.getElementById('extractBtn');
            const colorGrid = document.getElementById('colorGrid');
            const resultsSection = document.getElementById('resultsSection');
            const colorCount = document.getElementById('colorCount');
            const algorithm = document.getElementById('algorithm');
            const ignoreWhite = document.getElementById('ignoreWhite');
            const ignoreBlack = document.getElementById('ignoreBlack');
            const copyAllBtn = document.getElementById('copyAllBtn');
            const exportBtn = document.getElementById('exportBtn');
            const toast = document.getElementById('toast');
            const progressContainer = document.getElementById('progressContainer');
            const progressFill = document.getElementById('progressFill');
            const progressText = document.getElementById('progressText');

            let uploadedImage = null;
            let extractedColors = [];

            // 拖放功能
            ['dragenter', 'dragover', 'dragleave', 'drop'].forEach(eventName => {
                dropZone.addEventListener(eventName, preventDefaults, false);
            });

            function preventDefaults(e) {
                e.preventDefault();
                e.stopPropagation();
            }

            ['dragenter', 'dragover'].forEach(eventName => {
                dropZone.addEventListener(eventName, highlight, false);
            });

            ['dragleave', 'drop'].forEach(eventName => {
                dropZone.addEventListener(eventName, unhighlight, false);
            });

            function highlight() {
                dropZone.classList.add('drag-over');
            }

            function unhighlight() {
                dropZone.classList.remove('drag-over');
            }

            dropZone.addEventListener('drop', handleDrop, false);

            function handleDrop(e) {
                const dt = e.dataTransfer;
                const files = dt.files;
                if (files.length > 0 && files[0].type.match('image.*')) {
                    handleImageUpload(files[0]);
                }
            }

            // 文件上传处理
            imageUpload.addEventListener('change', function() {
                if (this.files && this.files[0]) {
                    handleImageUpload(this.files[0]);
                }
            });

            function handleImageUpload(file) {
                const reader = new FileReader();
                
                reader.onload = function(e) {
                    imagePreview.src = e.target.result;
                    imagePreview.classList.remove('hidden');
                    noImageText.classList.add('hidden');
                    
                    // 创建新的Image对象以便后续处理
                    uploadedImage = new Image();
                    uploadedImage.onload = function() {
                        extractBtn.disabled = false;
                    };
                    uploadedImage.src = e.target.result;
                };
                
                reader.readAsDataURL(file);
            }

            // 提取颜色按钮点击事件
            extractBtn.addEventListener('click', function() {
                if (!uploadedImage) return;
                
                const count = parseInt(colorCount.value);
                const algo = algorithm.value;
                const ignoreW = ignoreWhite.checked;
                const ignoreB = ignoreBlack.checked;
                
                progressContainer.classList.remove('hidden');
                progressFill.style.width = '0%';
                progressText.textContent = '0%';
                
                // 使用setTimeout让UI有时间更新
                setTimeout(() => {
                    extractedColors = extractColorsFromImage(uploadedImage, count, algo, ignoreW, ignoreB);
                    displayColorCards(extractedColors);
                    resultsSection.classList.remove('hidden');
                    progressContainer.classList.add('hidden');
                }, 100);
            });

            // 从图片中提取颜色的函数
            function extractColorsFromImage(image, colorCount, algorithm, ignoreWhite, ignoreBlack) {
                const canvas = document.createElement('canvas');
                const ctx = canvas.getContext('2d');
                const width = Math.min(image.width, 200); // 缩小尺寸以提高性能
                const height = Math.min(image.height, 200);
                canvas.width = width;
                canvas.height = height;
                
                // 绘制图片到canvas
                ctx.drawImage(image, 0, 0, width, height);
                
                // 获取像素数据
                const imageData = ctx.getImageData(0, 0, width, height).data;
                const pixels = [];
                
                // 收集所有像素颜色
                for (let i = 0; i < imageData.length; i += 4) {
                    const r = imageData[i];
                    const g = imageData[i + 1];
                    const b = imageData[i + 2];
                    const a = imageData[i + 3];
                    
                    // 忽略透明度低的像素
                    if (a < 128) continue;
                    
                    // 检查是否忽略白色/黑色
                    if (ignoreWhite && isNearWhite(r, g, b)) continue;
                    if (ignoreBlack && isNearBlack(r, g, b)) continue;
                    
                    pixels.push([r, g, b]);
                    
                    // 更新进度
                    if (i % 400 === 0) {
                        const progress = Math.min(100, Math.floor((i / imageData.length) * 100));
                        progressFill.style.width = `${progress}%`;
                        progressText.textContent = `${progress}%`;
                    }
                }
                
                // 根据选择的算法提取主要颜色
                let colors;
                switch (algorithm) {
                    case 'kmeans':
                        colors = kMeansClustering(pixels, colorCount);
                        break;
                    case 'medianCut':
                        colors = medianCut(pixels, colorCount);
                        break;
                    case 'simple':
                        colors = simpleSampling(pixels, colorCount);
                        break;
                    default:
                        colors = medianCut(pixels, colorCount);
                }
                
                // 转换为十六进制并命名
                return colors.map(color => {
                    const hex = rgbToHex(color[0], color[1], color[2]);
                    return {
                        name: `Color ${hex}`,
                        value: hex
                    };
                });
            }
            
            // 辅助函数：判断是否接近白色
            function isNearWhite(r, g, b, threshold = 220) {
                return r > threshold && g > threshold && b > threshold;
            }
            
            // 辅助函数：判断是否接近黑色
            function isNearBlack(r, g, b, threshold = 30) {
                return r < threshold && g < threshold && b < threshold;
            }
            
            // RGB转十六进制
            function rgbToHex(r, g, b) {
                return '#' + [r, g, b].map(x => {
                    const hex = x.toString(16);
                    return hex.length === 1 ? '0' + hex : hex;
                }).join('');
            }
            
            // 简单采样算法
            function simpleSampling(pixels, count) {
                const step = Math.floor(pixels.length / count);
                const colors = [];
                
                for (let i = 0; i < pixels.length && colors.length < count; i += step) {
                    colors.push(pixels[i]);
                }
                
                return colors;
            }
            
            // 中值切割算法
            function medianCut(pixels, count) {
                let buckets = [pixels];
                
                while (buckets.length < count) {
                    const newBuckets = [];
                    
                    for (const bucket of buckets) {
                        if (bucket.length === 0) continue;
                        
                        // 找到颜色范围最大的通道
                        let rMin = 255, rMax = 0;
                        let gMin = 255, gMax = 0;
                        let bMin = 255, bMax = 0;
                        
                        for (const [r, g, b] of bucket) {
                            rMin = Math.min(rMin, r);
                            rMax = Math.max(rMax, r);
                            gMin = Math.min(gMin, g);
                            gMax = Math.max(gMax, g);
                            bMin = Math.min(bMin, b);
                            bMax = Math.max(bMax, b);
                        }
                        
                        const rRange = rMax - rMin;
                        const gRange = gMax - gMin;
                        const bRange = bMax - bMin;
                        
                        const maxRange = Math.max(rRange, gRange, bRange);
                        const channel = maxRange === rRange ? 0 : (maxRange === gRange ? 1 : 2);
                        
                        // 按选定通道排序
                        bucket.sort((a, b) => a[channel] - b[channel]);
                        
                        // 找到中值并分割
                        const medianIndex = Math.floor(bucket.length / 2);
                        newBuckets.push(bucket.slice(0, medianIndex));
                        newBuckets.push(bucket.slice(medianIndex));
                    }
                    
                    buckets = newBuckets;
                    if (buckets.length >= count) break;
                }
                
                // 计算每个桶的平均颜色
                return buckets.map(bucket => {
                    if (bucket.length === 0) return [0, 0, 0];
                    
                    let rSum = 0, gSum = 0, bSum = 0;
                    for (const [r, g, b] of bucket) {
                        rSum += r;
                        gSum += g;
                        bSum += b;
                    }
                    
                    return [
                        Math.round(rSum / bucket.length),
                        Math.round(gSum / bucket.length),
                        Math.round(bSum / bucket.length)
                    ];
                });
            }
            
            // K-means聚类算法
            function kMeansClustering(pixels, k, maxIterations = 10) {
                // 随机选择初始中心点
                let centroids = [];
                const step = Math.floor(pixels.length / k);
                for (let i = 0; i < k; i++) {
                    centroids.push(pixels[i * step]);
                }
                
                let clusters;
                
                for (let iter = 0; iter < maxIterations; iter++) {
                    // 分配每个点到最近的中心点
                    clusters = Array(k).fill().map(() => []);
                    
                    for (const pixel of pixels) {
                        let minDist = Infinity;
                        let closestCentroid = 0;
                        
                        for (let i = 0; i < centroids.length; i++) {
                            const dist = colorDistance(pixel, centroids[i]);
                            if (dist < minDist) {
                                minDist = dist;
                                closestCentroid = i;
                            }
                        }
                        
                        clusters[closestCentroid].push(pixel);
                    }
                    
                    // 计算新的中心点
                    const newCentroids = [];
                    for (const cluster of clusters) {
                        if (cluster.length === 0) {
                            // 如果集群为空，保留旧的中心点
                            newCentroids.push(centroids[newCentroids.length]);
                            continue;
                        }
                        
                        let rSum = 0, gSum = 0, bSum = 0;
                        for (const [r, g, b] of cluster) {
                            rSum += r;
                            gSum += g;
                            bSum += b;
                        }
                        
                        newCentroids.push([
                            Math.round(rSum / cluster.length),
                            Math.round(gSum / cluster.length),
                            Math.round(bSum / cluster.length)
                        ]);
                    }
                    
                    // 检查是否收敛
                    let converged = true;
                    for (let i = 0; i < centroids.length; i++) {
                        if (colorDistance(centroids[i], newCentroids[i]) > 5) {
                            converged = false;
                            break;
                        }
                    }
                    
                    centroids = newCentroids;
                    if (converged) break;
                }
                
                return centroids;
            }
            
            // 计算两个颜色之间的距离
            function colorDistance(c1, c2) {
                const dr = c1[0] - c2[0];
                const dg = c1[1] - c2[1];
                const db = c1[2] - c2[2];
                return Math.sqrt(dr * dr + dg * dg + db * db);
            }
            
            // 显示颜色卡片
            function displayColorCards(colors) {
                colorGrid.innerHTML = '';
                
                colors.forEach(color => {
                    const colorCard = document.createElement('div');
                    colorCard.className = 'color-card bg-white rounded-lg overflow-hidden';
                    
                    // 计算文本颜色基于背景亮度
                    const hex = color.value.replace('#', '');
                    const r = parseInt(hex.substring(0, 2), 16);
                    const g = parseInt(hex.substring(2, 4), 16);
                    const b = parseInt(hex.substring(4, 6), 16);
                    const brightness = (r * 299 + g * 587 + b * 114) / 1000;
                    const textColor = brightness > 128 ? 'text-gray-900' : 'text-white';
                    
                    colorCard.innerHTML = `
                        <div class="color-preview" style="background-color: ${color.value};"></div>
                        <div class="p-4">
                            <h3 class="font-semibold text-lg mb-1">${color.name}</h3>
                            <div class="flex items-center justify-between mt-2">
                                <span class="color-value ${textColor} bg-black bg-opacity-20 px-2 py-1 rounded" data-value="${color.value}">${color.value}</span>
                                <div class="copied-message text-sm text-gray-600">已复制!</div>
                            </div>
                        </div>
                    `;
                    colorGrid.appendChild(colorCard);
                });
                
                // 添加点击事件到所有颜色值
                document.querySelectorAll('.color-value').forEach(el => {
                    el.addEventListener('click', function() {
                        const colorValue = this.getAttribute('data-value');
                        navigator.clipboard.writeText(colorValue).then(() => {
                            // 显示通知
                            toast.classList.remove('hidden');
                            setTimeout(() => {
                                toast.classList.add('hidden');
                            }, 2000);
                            
                            // 显示特定卡片上的复制消息
                            const copiedMsg = this.nextElementSibling;
                            copiedMsg.classList.add('show-copied');
                            setTimeout(() => {
                                copiedMsg.classList.remove('show-copied');
                            }, 1000);
                        });
                    });
                });
            }
            
            // 复制全部按钮
            copyAllBtn.addEventListener('click', function() {
                const allColors = extractedColors.map(c => c.value).join('\n');
                navigator.clipboard.writeText(allColors).then(() => {
                    toast.textContent = '所有颜色已复制到剪贴板!';
                    toast.classList.remove('hidden');
                    setTimeout(() => {
                        toast.classList.add('hidden');
                    }, 2000);
                });
            });
            
            // 导出色卡按钮
            exportBtn.addEventListener('click', function() {
                if (!extractedColors.length) return;
                
                const canvas = document.createElement('canvas');
                const ctx = canvas.getContext('2d');
                const cardWidth = 200;
                const cardHeight = 150;
                const margin = 10;
                
                // 计算画布大小
                const cols = Math.min(4, extractedColors.length);
                const rows = Math.ceil(extractedColors.length / cols);
                canvas.width = cols * (cardWidth + margin) + margin;
                canvas.height = rows * (cardHeight + margin) + margin + 40; // 额外空间用于标题
                
                // 绘制背景
                ctx.fillStyle = '#ffffff';
                ctx.fillRect(0, 0, canvas.width, canvas.height);
                
                // 添加标题
                ctx.fillStyle = '#333333';
                ctx.font = 'bold 20px Arial';
                ctx.textAlign = 'center';
                ctx.fillText('提取的颜色色卡', canvas.width / 2, 30);
                
                // 绘制颜色卡片
                ctx.font = '14px Arial';
                ctx.textAlign = 'left';
                
                for (let i = 0; i < extractedColors.length; i++) {
                    const color = extractedColors[i];
                    const col = i % cols;
                    const row = Math.floor(i / cols);
                    
                    const x = margin + col * (cardWidth + margin);
                    const y = 40 + margin + row * (cardHeight + margin);
                    
                    // 绘制颜色块
                    ctx.fillStyle = color.value;
                    ctx.fillRect(x, y, cardWidth, cardHeight * 0.7);
                    
                    // 绘制信息区域
                    ctx.fillStyle = '#f8f8f8';
                    ctx.fillRect(x, y + cardHeight * 0.7, cardWidth, cardHeight * 0.3);
                    
                    // 绘制颜色信息
                    ctx.fillStyle = '#333333';
                    ctx.fillText(color.name, x + 10, y + cardHeight * 0.7 + 25);
                    ctx.fillText(color.value, x + 10, y + cardHeight * 0.7 + 45);
                }
                
                // 导出为PNG
                const link = document.createElement('a');
                link.download = 'color-palette.png';
                link.href = canvas.toDataURL('image/png');
                link.click();
            });
        });
    </script>
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