裁剪提示會建議圖片裁剪區域的端點。
已套用裁剪提示 (顯示比例 2:1):
裁剪提示偵測要求
設定 Google Cloud 專案和驗證
如果您尚未建立 Google Cloud 專案,請立即建立。展開這個部分即可查看操作說明。
-
In the Google Cloud console, on the project selector page, select or create a Google Cloud project.
Roles required to select or create a project
- Select a project: Selecting a project doesn't require a specific IAM role—you can select any project that you've been granted a role on.
-
Create a project: To create a project, you need the Project Creator
(
roles/resourcemanager.projectCreator
), which contains theresourcemanager.projects.create
permission. Learn how to grant roles.
-
Verify that billing is enabled for your Google Cloud project.
-
Enable the Vision API.
Roles required to enable APIs
To enable APIs, you need the Service Usage Admin IAM role (
roles/serviceusage.serviceUsageAdmin
), which contains theserviceusage.services.enable
permission. Learn how to grant roles. -
Install the Google Cloud CLI.
-
設定 gcloud CLI 以使用您的聯合身分。
詳情請參閱「 使用聯合身分登入 gcloud CLI」。
-
如要初始化 gcloud CLI,請執行下列指令:
gcloud init
偵測本機圖片的裁剪提示
您可以使用 Vision API 對本機圖片檔執行特徵偵測。
如果是 REST 要求,請在要求主體中,以 base64 編碼字串的形式傳送圖片檔案內容。
如果是
gcloud
和用戶端程式庫要求,請在要求中指定本機圖片的路徑。REST
使用任何要求資料之前,請先替換以下項目:
- BASE64_ENCODED_IMAGE:二進位圖片資料的 Base64 表示法 (ASCII 字串)。這個字串應類似下列字串:
/9j/4QAYRXhpZgAA...9tAVx/zDQDlGxn//2Q==
- PROJECT_ID:您的 Google Cloud 專案 ID。
欄位專屬注意事項:
cropHintsParams.aspectRatios
- 對應至圖片指定比例 (寬度:高度) 的浮點數。你最多可以提供 16 個裁剪比例。
HTTP 方法和網址:
POST https://vision.googleapis.com/v1/images:annotate
JSON 要求主體:
{ "requests": [ { "image": { "content": "BASE64_ENCODED_IMAGE" }, "features": [ { "type": "CROP_HINTS" } ], "imageContext": { "cropHintsParams": { "aspectRatios": [ 2.0 ] } } } ] }
如要傳送要求,請選擇以下其中一個選項:
curl
將要求主體儲存在名為
request.json
的檔案中,然後執行下列指令:curl -X POST \
-H "Authorization: Bearer $(gcloud auth print-access-token)" \
-H "x-goog-user-project: PROJECT_ID" \
-H "Content-Type: application/json; charset=utf-8" \
-d @request.json \
"https://vision.googleapis.com/v1/images:annotate"PowerShell
將要求主體儲存在名為
request.json
的檔案中,然後執行下列指令:$cred = gcloud auth print-access-token
$headers = @{ "Authorization" = "Bearer $cred"; "x-goog-user-project" = "PROJECT_ID" }
Invoke-WebRequest `
-Method POST `
-Headers $headers `
-ContentType: "application/json; charset=utf-8" `
-InFile request.json `
-Uri "https://vision.googleapis.com/v1/images:annotate" | Select-Object -Expand Content如果要求成功,伺服器會傳回
200 OK
HTTP 狀態碼與 JSON 格式的回應。回覆:
{ "responses": [ { "cropHintsAnnotation": { "cropHints": [ { "boundingPoly": { "vertices": [ { "y": 520 }, { "x": 2369, "y": 520 }, { "x": 2369, "y": 1729 }, { "y": 1729 } ] }, "confidence": 0.79999995, "importanceFraction": 0.66999996 } ] } } ] }
Go
在試用這個範例之前,請先按照Go「使用用戶端程式庫的 Vision 快速入門導覽課程」中的設定說明操作。詳情請參閱 Vision Go API 參考說明文件。
如要向 Vision 進行驗證,請設定應用程式預設憑證。 詳情請參閱「為本機開發環境設定驗證」。
// detectCropHints gets suggested croppings the Vision API for an image at the given file path. func detectCropHints(w io.Writer, file string) error { ctx := context.Background() client, err := vision.NewImageAnnotatorClient(ctx) if err != nil { return err } f, err := os.Open(file) if err != nil { return err } defer f.Close() image, err := vision.NewImageFromReader(f) if err != nil { return err } res, err := client.CropHints(ctx, image, nil) if err != nil { return err } fmt.Fprintln(w, "Crop hints:") for _, hint := range res.CropHints { for _, v := range hint.BoundingPoly.Vertices { fmt.Fprintf(w, "(%d,%d)\n", v.X, v.Y) } } return nil }
Java
在試用這個範例之前,請先按照使用用戶端程式庫的 Vision API 快速入門導覽課程中的 Java 設定操作說明進行操作。詳情請參閱 Vision API Java 參考說明文件。
import com.google.cloud.vision.v1.AnnotateImageRequest; import com.google.cloud.vision.v1.AnnotateImageResponse; import com.google.cloud.vision.v1.BatchAnnotateImagesResponse; import com.google.cloud.vision.v1.CropHint; import com.google.cloud.vision.v1.CropHintsAnnotation; import com.google.cloud.vision.v1.Feature; import com.google.cloud.vision.v1.Image; import com.google.cloud.vision.v1.ImageAnnotatorClient; import com.google.protobuf.ByteString; import java.io.FileInputStream; import java.io.IOException; import java.util.ArrayList; import java.util.List; public class DetectCropHints { public static void detectCropHints() throws IOException { // TODO(developer): Replace these variables before running the sample. String filePath = "path/to/your/image/file.jpg"; detectCropHints(filePath); } // Suggests a region to crop to for a local file. public static void detectCropHints(String filePath) throws IOException { List<AnnotateImageRequest> requests = new ArrayList<>(); ByteString imgBytes = ByteString.readFrom(new FileInputStream(filePath)); Image img = Image.newBuilder().setContent(imgBytes).build(); Feature feat = Feature.newBuilder().setType(Feature.Type.CROP_HINTS).build(); AnnotateImageRequest request = AnnotateImageRequest.newBuilder().addFeatures(feat).setImage(img).build(); requests.add(request); // Initialize client that will be used to send requests. This client only needs to be created // once, and can be reused for multiple requests. After completing all of your requests, call // the "close" method on the client to safely clean up any remaining background resources. try (ImageAnnotatorClient client = ImageAnnotatorClient.create()) { BatchAnnotateImagesResponse response = client.batchAnnotateImages(requests); List<AnnotateImageResponse> responses = response.getResponsesList(); for (AnnotateImageResponse res : responses) { if (res.hasError()) { System.out.format("Error: %s%n", res.getError().getMessage()); return; } // For full list of available annotations, see http://g.co/cloud/vision/docs CropHintsAnnotation annotation = res.getCropHintsAnnotation(); for (CropHint hint : annotation.getCropHintsList()) { System.out.println(hint.getBoundingPoly()); } } } } }
Node.js
在試用這個範例之前,請先按照Node.js「使用用戶端程式庫的 Vision 快速入門導覽課程」中的設定說明操作。詳情請參閱 Vision Node.js API 參考說明文件。
如要向 Vision 進行驗證,請設定應用程式預設憑證。 詳情請參閱「為本機開發環境設定驗證」。
// Imports the Google Cloud client library const vision = require('@google-cloud/vision'); // Creates a client const client = new vision.ImageAnnotatorClient(); /** * TODO(developer): Uncomment the following line before running the sample. */ // const fileName = 'Local image file, e.g. /path/to/image.png'; // Find crop hints for the local file const [result] = await client.cropHints(fileName); const cropHints = result.cropHintsAnnotation; cropHints.cropHints.forEach((hintBounds, hintIdx) => { console.log(`Crop Hint ${hintIdx}:`); hintBounds.boundingPoly.vertices.forEach((bound, boundIdx) => { console.log(` Bound ${boundIdx}: (${bound.x}, ${bound.y})`); }); });
Python
在試用這個範例之前,請先按照Python「使用用戶端程式庫的 Vision 快速入門導覽課程」中的設定說明操作。詳情請參閱 Vision Python API 參考說明文件。
如要向 Vision 進行驗證,請設定應用程式預設憑證。 詳情請參閱「為本機開發環境設定驗證」。
def detect_crop_hints(path): """Detects crop hints in an image.""" from google.cloud import vision client = vision.ImageAnnotatorClient() with open(path, "rb") as image_file: content = image_file.read() image = vision.Image(content=content) crop_hints_params = vision.CropHintsParams(aspect_ratios=[1.77]) image_context = vision.ImageContext(crop_hints_params=crop_hints_params) response = client.crop_hints(image=image, image_context=image_context) hints = response.crop_hints_annotation.crop_hints for n, hint in enumerate(hints): print(f"\nCrop Hint: {n}") vertices = [ f"({vertex.x},{vertex.y})" for vertex in hint.bounding_poly.vertices ] print("bounds: {}".format(",".join(vertices))) if response.error.message: raise Exception( "{}\nFor more info on error messages, check: " "https://cloud.google.com/apis/design/errors".format(response.error.message) )
其他語言
C#: 請按照用戶端程式庫頁面上的C# 設定說明操作, 然後前往 .NET 適用的 Vision 參考說明文件。
PHP: 請按照用戶端程式庫頁面的 PHP 設定說明操作, 然後前往 PHP 適用的 Vision 參考文件。
Ruby: 請按照用戶端程式庫頁面的 Ruby 設定說明操作, 然後前往 Ruby 適用的 Vision 參考說明文件。
偵測遠端圖片的裁剪提示
您可以透過 Vision API,對位於 Cloud Storage 或網路上的遠端圖片檔案執行特徵偵測。如要傳送遠端檔案要求,請在要求內文中指定檔案的網頁網址或 Cloud Storage URI。
REST
使用任何要求資料之前,請先替換以下項目:
- CLOUD_STORAGE_IMAGE_URI:Cloud Storage 值區中有效圖片檔案的路徑。您必須至少擁有檔案的讀取權限。
範例:
gs://cloud-samples-data/vision/crop_hints/bubble.jpeg
- PROJECT_ID:您的 Google Cloud 專案 ID。
欄位專屬注意事項:
cropHintsParams.aspectRatios
- 對應至圖片指定比例 (寬度:高度) 的浮點數。你最多可以提供 16 個裁剪比例。
HTTP 方法和網址:
POST https://vision.googleapis.com/v1/images:annotate
JSON 要求主體:
{ "requests": [ { "image": { "source": { "gcsImageUri": "CLOUD_STORAGE_IMAGE_URI" } }, "features": [ { "type": "CROP_HINTS" } ], "imageContext": { "cropHintsParams": { "aspectRatios": [ 2.0 ] } } } ] }
如要傳送要求,請選擇以下其中一個選項:
curl
將要求主體儲存在名為
request.json
的檔案中,然後執行下列指令:curl -X POST \
-H "Authorization: Bearer $(gcloud auth print-access-token)" \
-H "x-goog-user-project: PROJECT_ID" \
-H "Content-Type: application/json; charset=utf-8" \
-d @request.json \
"https://vision.googleapis.com/v1/images:annotate"PowerShell
將要求主體儲存在名為
request.json
的檔案中,然後執行下列指令:$cred = gcloud auth print-access-token
$headers = @{ "Authorization" = "Bearer $cred"; "x-goog-user-project" = "PROJECT_ID" }
Invoke-WebRequest `
-Method POST `
-Headers $headers `
-ContentType: "application/json; charset=utf-8" `
-InFile request.json `
-Uri "https://vision.googleapis.com/v1/images:annotate" | Select-Object -Expand Content如果要求成功,伺服器會傳回
200 OK
HTTP 狀態碼與 JSON 格式的回應。回覆:
{ "responses": [ { "cropHintsAnnotation": { "cropHints": [ { "boundingPoly": { "vertices": [ { "y": 520 }, { "x": 2369, "y": 520 }, { "x": 2369, "y": 1729 }, { "y": 1729 } ] }, "confidence": 0.79999995, "importanceFraction": 0.66999996 } ] } } ] }
Java
在試用這個範例之前,請先按照Java「使用用戶端程式庫的 Vision 快速入門導覽課程」中的設定說明操作。詳情請參閱 Vision Java API 參考說明文件。
如要向 Vision 進行驗證,請設定應用程式預設憑證。 詳情請參閱「為本機開發環境設定驗證」。
import com.google.cloud.vision.v1.AnnotateImageRequest; import com.google.cloud.vision.v1.AnnotateImageResponse; import com.google.cloud.vision.v1.BatchAnnotateImagesResponse; import com.google.cloud.vision.v1.CropHint; import com.google.cloud.vision.v1.CropHintsAnnotation; import com.google.cloud.vision.v1.Feature; import com.google.cloud.vision.v1.Image; import com.google.cloud.vision.v1.ImageAnnotatorClient; import com.google.cloud.vision.v1.ImageSource; import java.io.IOException; import java.util.ArrayList; import java.util.List; public class DetectCropHintsGcs { public static void detectCropHintsGcs() throws IOException { // TODO(developer): Replace these variables before running the sample. String filePath = "gs://your-gcs-bucket/path/to/image/file.jpg"; detectCropHintsGcs(filePath); } // Suggests a region to crop to for a remote file on Google Cloud Storage. public static void detectCropHintsGcs(String gcsPath) throws IOException { List<AnnotateImageRequest> requests = new ArrayList<>(); ImageSource imgSource = ImageSource.newBuilder().setGcsImageUri(gcsPath).build(); Image img = Image.newBuilder().setSource(imgSource).build(); Feature feat = Feature.newBuilder().setType(Feature.Type.CROP_HINTS).build(); AnnotateImageRequest request = AnnotateImageRequest.newBuilder().addFeatures(feat).setImage(img).build(); requests.add(request); // Initialize client that will be used to send requests. This client only needs to be created // once, and can be reused for multiple requests. After completing all of your requests, call // the "close" method on the client to safely clean up any remaining background resources. try (ImageAnnotatorClient client = ImageAnnotatorClient.create()) { BatchAnnotateImagesResponse response = client.batchAnnotateImages(requests); List<AnnotateImageResponse> responses = response.getResponsesList(); for (AnnotateImageResponse res : responses) { if (res.hasError()) { System.out.format("Error: %s%n", res.getError().getMessage()); return; } // For full list of available annotations, see http://g.co/cloud/vision/docs CropHintsAnnotation annotation = res.getCropHintsAnnotation(); for (CropHint hint : annotation.getCropHintsList()) { System.out.println(hint.getBoundingPoly()); } } } } }
Go
在試用這個範例之前,請先按照Go「使用用戶端程式庫的 Vision 快速入門導覽課程」中的設定說明操作。詳情請參閱 Vision Go API 參考說明文件。
如要向 Vision 進行驗證,請設定應用程式預設憑證。 詳情請參閱「為本機開發環境設定驗證」。
// detectCropHints gets suggested croppings the Vision API for an image at the given file path. func detectCropHintsURI(w io.Writer, file string) error { ctx := context.Background() client, err := vision.NewImageAnnotatorClient(ctx) if err != nil { return err } image := vision.NewImageFromURI(file) res, err := client.CropHints(ctx, image, nil) if err != nil { return err } fmt.Fprintln(w, "Crop hints:") for _, hint := range res.CropHints { for _, v := range hint.BoundingPoly.Vertices { fmt.Fprintf(w, "(%d,%d)\n", v.X, v.Y) } } return nil }
Node.js
在試用這個範例之前,請先按照Node.js「使用用戶端程式庫的 Vision 快速入門導覽課程」中的設定說明操作。詳情請參閱 Vision Node.js API 參考說明文件。
如要向 Vision 進行驗證,請設定應用程式預設憑證。 詳情請參閱「為本機開發環境設定驗證」。
// Imports the Google Cloud client libraries const vision = require('@google-cloud/vision'); // Creates a client const client = new vision.ImageAnnotatorClient(); /** * TODO(developer): Uncomment the following lines before running the sample. */ // const bucketName = 'Bucket where the file resides, e.g. my-bucket'; // const fileName = 'Path to file within bucket, e.g. path/to/image.png'; // Find crop hints for the remote file const [result] = await client.cropHints(`gs://${bucketName}/${fileName}`); const cropHints = result.cropHintsAnnotation; cropHints.cropHints.forEach((hintBounds, hintIdx) => { console.log(`Crop Hint ${hintIdx}:`); hintBounds.boundingPoly.vertices.forEach((bound, boundIdx) => { console.log(` Bound ${boundIdx}: (${bound.x}, ${bound.y})`); }); });
Python
在試用這個範例之前,請先按照Python「使用用戶端程式庫的 Vision 快速入門導覽課程」中的設定說明操作。詳情請參閱 Vision Python API 參考說明文件。
如要向 Vision 進行驗證,請設定應用程式預設憑證。 詳情請參閱「為本機開發環境設定驗證」。
def detect_crop_hints_uri(uri): """Detects crop hints in the file located in Google Cloud Storage.""" from google.cloud import vision client = vision.ImageAnnotatorClient() image = vision.Image() image.source.image_uri = uri crop_hints_params = vision.CropHintsParams(aspect_ratios=[1.77]) image_context = vision.ImageContext(crop_hints_params=crop_hints_params) response = client.crop_hints(image=image, image_context=image_context) hints = response.crop_hints_annotation.crop_hints for n, hint in enumerate(hints): print(f"\nCrop Hint: {n}") vertices = [ f"({vertex.x},{vertex.y})" for vertex in hint.bounding_poly.vertices ] print("bounds: {}".format(",".join(vertices))) if response.error.message: raise Exception( "{}\nFor more info on error messages, check: " "https://cloud.google.com/apis/design/errors".format(response.error.message) )
gcloud
如要執行文字偵測,請使用
gcloud ml vision suggest-crop
指令,如下列範例所示:gcloud ml vision suggest-crop gs://cloud-samples-data/vision/crop_hints/bubble.jpeg
其他語言
C#: 請按照用戶端程式庫頁面上的C# 設定說明操作, 然後前往 .NET 適用的 Vision 參考說明文件。
PHP: 請按照用戶端程式庫頁面的 PHP 設定說明操作, 然後前往 PHP 適用的 Vision 參考文件。
Ruby: 請按照用戶端程式庫頁面的 Ruby 設定說明操作, 然後前往 Ruby 適用的 Vision 參考說明文件。
試試看
請試著在下方偵測裁剪提示。你可以使用已指定的圖片 (
gs://cloud-samples-data/vision/crop_hints/bubble.jpeg
),也可以指定自己的圖片。選取「Execute」,傳送要求。圖片來源: Unsplash 的 Yasmin Dangor。 要求主體:
{ "requests": [ { "image": { "source": { "gcsImageUri": "gs://cloud-samples-data/vision/crop_hints/bubble.jpeg" } }, "features": [ { "type": "CROP_HINTS" } ], "imageContext": { "cropHintsParams": { "aspectRatios": [ 2 ] } } } ] }
- BASE64_ENCODED_IMAGE:二進位圖片資料的 Base64 表示法 (ASCII 字串)。這個字串應類似下列字串: