如何使用Google Cloud Vision API确认图像(包含手写和打印文本)是否包含手写文本？
如何使用Google Cloud Vision API确认图像(包含手写和打印文本)是否包含手写文本？
提问于 2019-10-12 10:40:45
我正在使用Cloud Vision API - DOCUMENT_TEXT_DETECTION功能从图像中检测手写文本。虽然它为我提取了手写数据，但当涉及到同时包含打印文本和手写文本的图像时，它不会使用标识符进行响应，该标识符表示此位是手写的，而此位是打印的。直截了当地说，问题是我想确认图像是否有手写文本。注意-图像可以只包含手写文本，也可以包含打印文本和手写文本的组合。
如果有人能详细说明我需要传递给cloud vision api的所有其他属性以实现此结果，将不胜感激？或者，有没有办法让Cloud Vision API标记出我的图像是否包含手写数据。
示例代码
public class Detect {
public static void main(String args[]) {
String filePath = "C:\\Development_Avecto\\images.jpg";
try {
detectDocumentText(filePath, System.out);
} catch (IOException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
public static void detectDocumentText(String filePath, PrintStream out) throws Exception, 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(Type.DOCUMENT_TEXT_DETECTION).build();
AnnotateImageRequest request = AnnotateImageRequest.newBuilder().addFeatures(feat).setImage(img).build();
requests.add(request);
try (ImageAnnotatorClient client = ImageAnnotatorClient.create()) {
BatchAnnotateImagesResponse response = client.batchAnnotateImages(requests);
List<AnnotateImageResponse> responses = response.getResponsesList();
client.close();
for (AnnotateImageResponse res : responses) {
if (res.hasError()) {
out.printf("Error: %s\n", res.getError().getMessage());
return;
}
TextAnnotation annotation = res.getFullTextAnnotation();
for (Page page : annotation.getPagesList()) {
String pageText = "";
for (Block block : page.getBlocksList()) {
String blockText = "";
for (Paragraph para : block.getParagraphsList()) {
String paraText = "";
for (Word word : para.getWordsList()) {
String wordText = "";
for (Symbol symbol : word.getSymbolsList()) {
wordText = wordText + symbol.getText();
out.format("Symbol text: %s (confidence: %f)\n",
symbol.getText(),symbol.getConfidence());
}
out.format("Word text: %s (confidence: %f)\n\n",wordText, word.getConfidence());
paraText = String.format("%s %s", paraText,wordText);
}
// Output Example using Paragraph:
out.println("\nParagraph: \n" + paraText);
out.format("Paragraph Confidence: %f\n",para.getConfidence());
blockText = blockText + paraText;
}
pageText = pageText + blockText;
}
}
out.println("\nComplete annotation:");
out.println(annotation.getText());
}
}
}
}图像-
回答 1
Stack Overflow用户
发布于 2020-06-26 06:15:21
这可能是有帮助的，这是工作样本。
public async Task<string> GetText(string imgPath,string language,string type)
{
TextResult = JsonResult = "";
var credential = CreateCredential();
var service = CreateService(credential);
service.HttpClient.Timeout = new TimeSpan(1,1,1);
byte[] file = File.ReadAllBytes(imgPath);
BatchAnnotateImagesRequest batchRequest = new BatchAnnotateImagesRequest();
batchRequest.Requests= new List<AnnotateImageRequest>();
batchRequest.Requests.Add(new AnnotateImageRequest()
{
Features = new List<Feature>() { new Feature() {Type = type, MaxResults =
1 }, },
ImageContext = new ImageContext() { LanguageHints = new List<string>() {
language } },
Image = new Image() { Content = Convert.ToBase64String(file) }
});
var annotate = service.Images.Annotate(batchRequest);
BatchAnnotateImagesResponse batchAnnotateImagesResponse = annotate.Execute();
if (batchAnnotateImagesResponse.Responses.Any())
{
AnnotateImageResponse annotateImageResponse =
batchAnnotateImagesResponse.Responses[0];
if (annotateImageResponse.Error != null)
{
if (annotateImageResponse.Error.Message != null)
Error = annotateImageResponse.Error.Message;
}
else
{
switch (type)
{
case "TEXT_DETECTION":
if (annotateImageResponse.TextAnnotations != null &&
annotateImageResponse.TextAnnotations.Any())
TextResult =
annotateImageResponse.TextAnnotations[0].Description.Replace("\n", "\r\n");
break;
case "DOCUMENT_TEXT_DETECTION":
if (annotateImageResponse.TextAnnotations != null &&
annotateImageResponse.TextAnnotations.Any())
TextResult =
annotateImageResponse.TextAnnotations[0].Description.Replace("\n", "\r\n");
break;
case "FACE_DETECTION":
if (annotateImageResponse.FaceAnnotations != null &&
annotateImageResponse.FaceAnnotations.Any())
TextResult =
JsonConvert.SerializeObject(annotateImageResponse.FaceAnnotations[0]);
break;
case "LOGO_DETECTION":
if (annotateImageResponse.LogoAnnotations != null &&
annotateImageResponse.LogoAnnotations.Any())
TextResult =
JsonConvert.SerializeObject(annotateImageResponse.LogoAnnotations[0]);
break;
case "LABEL_DETECTION":
if (annotateImageResponse.LabelAnnotations != null &&
annotateImageResponse.LabelAnnotations.Any())
TextResult =
JsonConvert.SerializeObject(annotateImageResponse.LabelAnnotations[0]);
break;
case "LANDMARK_DETECTION":
if (annotateImageResponse.LandmarkAnnotations != null &&
annotateImageResponse.LandmarkAnnotations.Any())
TextResult =
JsonConvert.SerializeObject(annotateImageResponse.LandmarkAnnotations[0]);
break;
case "SAFE_SEARCH_DETECTION":
if (annotateImageResponse.SafeSearchAnnotation != null)
TextResult =
JsonConvert.SerializeObject(annotateImageResponse.SafeSearchAnnotation);
break;
case "IMAGE_PROPERTIES":
if (annotateImageResponse.ImagePropertiesAnnotation != null)
TextResult =
JsonConvert.SerializeObject(annotateImageResponse.ImagePropertiesAnnotation);
break;
}
}
}
return TextResult;
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/58353278
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