Мобильная версияЯ использовал менеджер пакетов NuGet в Visual Studios для установки Tesseract, а затем скопировал файлы в Папка плагина находится внутри папки Assets в Unity, а также eng.tessData. Однако каждый раз, когда я запускаю свой код и делаю снимок для его чтения, я получаю эту ошибку OCR Error: Целью вызова было создано исключение. Любой совет хорош.
Вот мой код
Код: Выделить всё
for the example.
using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Net.Http;
using System.Threading.Tasks;
using UnityEngine;
using UnityEngine.Networking;
using UnityEngine.UI;
using Newtonsoft.Json.Linq;
using Tesseract;
public class CaptureCards : MonoBehaviour
{
public RawImage cameraFeed;
public Button captureButton;
public Text cardDetailsText;
private WebCamTexture webCamTexture;
private HttpClient httpClient;
// Start is called before the first frame update
void Start()
{
StartCameraFeed();
httpClient = new HttpClient();
captureButton.onClick.AddListener(CaptureAndProcess);
}
void StartCameraFeed()
{
WebCamDevice[] devices = WebCamTexture.devices;
if (devices.Length == 0)
{
Debug.LogError("No camera devices found.");
return;
}
// Log available cameras
Debug.Log("Available cameras:");
foreach (var device in devices)
{
Debug.Log(device.name);
}
string selectedCamera = devices[0].name;
Debug.Log("Using camera: " + selectedCamera);
webCamTexture = new WebCamTexture(selectedCamera);
cameraFeed.texture = webCamTexture;
cameraFeed.material.mainTexture = webCamTexture;
webCamTexture.Play();
}
async void CaptureAndProcess()
{
if (webCamTexture == null || !webCamTexture.isPlaying)
{
cardDetailsText.text = "Camera feed not available.";
return;
}
Texture2D captureImage = new Texture2D(webCamTexture.width, webCamTexture.height);
captureImage.SetPixels(webCamTexture.GetPixels());
captureImage.Apply();
string tempPath = Path.Combine(Application.persistentDataPath, "captureCard.png");
Texture2D preprocessedImage = PreprocessImage(captureImage);
File.WriteAllBytes(tempPath, preprocessedImage.EncodeToPNG());
Debug.Log("Image saved at: " + tempPath);
string cardName = await RecognizeText(tempPath);
if (!string.IsNullOrEmpty(cardName))
{
JObject cardData = await FetchCardDetails(cardName);
if (cardData != null)
{
DisplayCardDetails(cardData);
SaveCardDetails(cardData);
}
else
{
cardDetailsText.text = "Card not Found";
}
}
else
{
cardDetailsText.text = "Failed to recognize card name";
}
}
Texture2D PreprocessImage(Texture2D original)
{
int targetWidth = 800; // Resize for better OCR accuracy
int targetHeight = (int)(original.height * (800.0f / original.width));
Texture2D resizedImage = new Texture2D(targetWidth, targetHeight);
for (int y = 0; y < targetHeight; y++)
{
for (int x = 0; x < targetWidth; x++)
{
Color pixel = original.GetPixelBilinear((float)x / targetWidth, (float)y / targetHeight);
resizedImage.SetPixel(x, y, pixel);
}
}
resizedImage.Apply();
// Convert to grayscale
Color[] pixels = resizedImage.GetPixels();
for (int i = 0; i < pixels.Length; i++)
{
float gray = pixels[i].grayscale;
pixels[i] = new Color(gray, gray, gray);
}
resizedImage.SetPixels(pixels);
resizedImage.Apply();
return resizedImage;
}
async Task RecognizeText(string imagePath)
{
string resultText = string.Empty;
string tessDataPath = Path.Combine(Application.streamingAssetsPath, "tessdata");
Debug.Log($"StreamingAssets Path: {Application.streamingAssetsPath}");
Debug.Log($"File Exists: {File.Exists(Path.Combine(Application.streamingAssetsPath, "tessdata", "eng.traineddata"))}");
await Task.Run(() =>
{
try
{
if (!Directory.Exists(tessDataPath))
throw new DirectoryNotFoundException($"Tesseract data directory not found: {tessDataPath}");
if (!File.Exists(Path.Combine(tessDataPath, "eng.traineddata")))
throw new FileNotFoundException("Tesseract trained data file not found (eng.traineddata).");
if (!File.Exists(imagePath))
throw new FileNotFoundException($"Image file not found: {imagePath}");
using (var engine = new TesseractEngine(tessDataPath, "eng", EngineMode.Default))
{
using (var img = Pix.LoadFromFile(imagePath))
{
using (var page = engine.Process(img, PageSegMode.SingleBlock))
{
resultText = page.GetText().Trim();
}
}
}
}
catch (Exception ex)
{
Debug.LogError($"OCR Error: {ex.Message}\n{ex.StackTrace}");
}
});
return resultText;
}
async Task FetchCardDetails(string cardName)
{
try
{
string apiUrl = $"https://api.scryfall.com/cards/named?exact={UnityWebRequest.EscapeURL(cardName)}";
string response = await httpClient.GetStringAsync(apiUrl);
return JObject.Parse(response);
}
catch
{
return null;
}
}
void DisplayCardDetails(JObject cardData)
{
string name = cardData["name"].ToString();
string type = cardData["type_line"].ToString();
string manaCost = cardData["mana_cost"].ToString();
string description = cardData["oracle_text"].ToString();
cardDetailsText.text = $"Name: {name}\nType: {type}\nMana Cost: {manaCost}\nDescription: {description}";
}
void SaveCardDetails(JObject cardData)
{
string savePath = Path.Combine(Application.persistentDataPath, "savedCards.json");
JArray savedCards = File.Exists(savePath)
? JArray.Parse(File.ReadAllText(savePath))
: new JArray();
savedCards.Add(cardData);
File.WriteAllText(savePath, savedCards.ToString());
}
void OnDestroy()
{
// Clean up resources
webCamTexture.Stop();
httpClient.Dispose();
}
}
Подробнее здесь: https://stackoverflow.com/questions/793 ... n-unity-3d
