利用PHP與七牛雲端儲存介面實現圖片的人臉辨識與影像搜尋的方法
引言:
隨著網路的快速發展,影像處理技術越來越成熟,人臉識別和圖像搜尋已經成為了我們日常生活中不可或缺的一部分。本文將介紹如何利用PHP程式語言和七牛雲端儲存接口,實現對圖片進行人臉辨識和影像搜尋的功能。同時,也將提供相應的程式碼範例。
一、準備工作:
1.申請七牛雲端儲存帳戶,並取得Access Key和Secret Key;
2.安裝並設定PHP環境。
二、人臉辨識功能實作:
1.上傳圖片到七牛雲端儲存:
require_once('qiniu/autoload.php'); use QiniuAuth; use QiniuStorageUploadManager; $accessKey = '<your-access-key>'; $secretKey = '<your-secret-key>'; $bucket = '<your-bucket-name>'; $auth = new Auth($accessKey, $secretKey); $token = $auth->uploadToken($bucket); $uploadMgr = new UploadManager(); list($ret, $err) = $uploadMgr->putFile($token, 'uploadKey', 'localFilePath'); if ($err !== null) { exit('上传失败:' . $err); }
2.呼叫七牛雲端儲存的人臉辨識API:
$accessKeyId = '<your-access-key>'; $accessKeySecret = '<your-access-key-secret>'; $url = 'https://api.qiniu.com/face/detection/detect'; $body = array( 'data' => array( 'uri' => $ret['key'], ), ); $content = json_encode($body); $timestamp = time(); $signStr = $url . " " . $content . " " . $timestamp; $sign = hash_hmac('sha1', $signStr, $accessKeySecret); $header = array( 'AccessKey: ' . $accessKeyId, 'Content-Type: application/json', 'Timestamp: ' . $timestamp, 'Sign: ' . $sign, ); $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $url); curl_setopt($ch, CURLOPT_TIMEOUT, 30); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt($ch, CURLOPT_HTTPHEADER, $header); curl_setopt($ch, CURLOPT_POST, 1); curl_setopt($ch, CURLOPT_POSTFIELDS, $content); $response = curl_exec($ch); if (curl_errno($ch) !== 0) { exit('请求失败:' . curl_error($ch)); } curl_close($ch); $result = json_decode($response, true); if ($result['code'] !== 0) { exit('人脸识别失败:' . $result['message']); }
3.解析人臉辨識結果:
$faces = $result['result']['faces']; foreach ($faces as $face) { $position = $face['position']; $age = $face['age']; $gender = $face['gender']; //.... }
三、圖片搜尋功能實作:
1.上傳圖片到七牛雲端儲存:
(同人臉辨識功能實作中的上傳圖片步驟)
2.呼叫七牛雲儲存的圖像搜尋API:
$accessKeyId = '<your-access-key>'; $accessKeySecret = '<your-access-key-secret>'; $url = 'https://api.qiniu.com/image/v2/search'; $body = array( 'data' => array( 'uri' => $ret['key'], 'limit' => 10, // 设置返回结果的数量 ), ); $content = json_encode($body); $timestamp = time(); $signStr = $url . " " . $content . " " . $timestamp; $sign = hash_hmac('sha1', $signStr, $accessKeySecret); $header = array( 'AccessKey: ' . $accessKeyId, 'Content-Type: application/json', 'Timestamp: ' . $timestamp, 'Sign: ' . $sign, ); $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $url); curl_setopt($ch, CURLOPT_TIMEOUT, 30); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt($ch, CURLOPT_HTTPHEADER, $header); curl_setopt($ch, CURLOPT_POST, 1); curl_setopt($ch, CURLOPT_POSTFIELDS, $content); $response = curl_exec($ch); if (curl_errno($ch) !== 0) { exit('请求失败:' . curl_error($ch)); } curl_close($ch); $result = json_decode($response, true); if ($result['code'] !== 0) { exit('图像搜索失败:' . $result['message']); }
3.解析圖像搜尋結果:
$items = $result['result']['items']; foreach ($items as $item) { $score = $item['score']; $key = $item['key']; //.... }
結束語:
透過使用PHP與七牛雲端儲存接口,我們可以輕鬆實現圖片的人臉辨識和影像搜尋功能。透過以上程式碼範例,我們可以了解到如何上傳圖片到七牛雲存儲,並透過呼叫相關API來實現人臉辨識和圖像搜尋功能。希望這篇文章能對讀者理解並使用PHP與七牛雲端儲存介面有所幫助。
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