The face recognition pipeline includes a face detection module and a face feature module, with several models in each module. Which models to use can be selected based on the benchmark data below. If you prioritize model accuracy, choose models with higher accuracy; if you prioritize inference speed, choose models with faster inference; if you prioritize model size, choose models with smaller storage requirements.
Face Detection Module:
| Model | Model Download Link | AP (%) Easy/Medium/Hard |
GPU Inference Time (ms) | CPU Inference Time | Model Size (M) | Description |
|---|---|---|---|---|---|---|
| BlazeFace | Inference Model/Trained Model | 77.7/73.4/49.5 | 0.447 | A lightweight and efficient face detection model | ||
| BlazeFace-FPN-SSH | Inference Model/Trained Model | 83.2/80.5/60.5 | 0.606 | Improved BlazeFace with FPN and SSH structures | ||
| PicoDet_LCNet_x2_5_face | Inference Model/Trained Model | 93.7/90.7/68.1 | 28.9 | Face detection model based on PicoDet_LCNet_x2_5 | ||
| PP-YOLOE_plus-S_face | Inference Model/Trained Model | 93.9/91.8/79.8 | 26.5 | Face detection model based on PP-YOLOE_plus-S |
Note: The above accuracy metrics are evaluated on the WIDER-FACE validation set with an input size of 640x640. All GPU inference times are based on an NVIDIA Tesla T4 machine with FP32 precision. CPU inference speeds are based on an Intel(R) Xeon(R) Gold 5117 CPU @ 2.00GHz with 8 threads and FP32 precision.
Face Recognition Module:
| Model | Model Download Link | Output Feature Dimension | AP (%) AgeDB-30/CFP-FP/LFW |
GPU Inference Time (ms) | CPU Inference Time | Model Size (M) | Description |
|---|---|---|---|---|---|---|---|
| MobileFaceNet | Inference Model/Trained Model | 128 | 96.28/96.71/99.58 | 4.1 | Face recognition model trained on MS1Mv3 based on MobileFaceNet | ||
| ResNet50_face | Inference Model/Trained Model | 512 | 98.12/98.56/99.77 | 87.2 | Face recognition model trained on MS1Mv3 based on ResNet50 |
Note: The above accuracy metrics are Accuracy scores measured on the AgeDB-30, CFP-FP, and LFW datasets, respectively. All GPU inference times are based on an NVIDIA Tesla T4 machine with FP32 precision. CPU inference speeds are based on an Intel(R) Xeon(R) Gold 5117 CPU @ 2.00GHz with 8 threads and FP32 precision.
| Parameter | Description | Type | Default |
|---|---|---|---|
pipeline |
The name of the pipeline or the path to the pipeline configuration file. If it is the pipeline name, it must be a pipeline supported by PaddleX. | str |
None |
device |
The device for pipeline model inference. Supports: "gpu", "cpu". | str |
"gpu" |
use_hpip |
Whether to enable high-performance inference, only available when the pipeline supports high-performance inference. | bool |
False |
| Parameter | Description | Type | Default |
|---|---|---|---|
data_root |
The root directory of the dataset, with data organization referring to Section 2.3: Data Organization for Building a Feature Library | str |
None |
index_dir |
The save path for the feature library. After successfully calling the build_index method, two files will be generated in this path:"id_map.pkl" saves the mapping relationship between image IDs and image feature labels;"vector.index" stores the feature vectors of each image. |
str |
None |
| Parameter Type | Description |
|---|---|
| Python Var | Supports directly passing in Python variables, such as image data represented by numpy.ndarray. |
str |
Supports passing in the file path of the data to be predicted, such as the local path of an image file: /root/data/img.jpg. |
str |
Supports passing in the URL of the data file to be predicted, such as the network URL of an image file: Example. |
str |
Supports passing in a local directory containing the data files to be predicted, such as the local path: /root/data/. |
dict |
Supports passing in a dictionary type, where the key needs to correspond to the specific task, such as "img" for image classification tasks, and the value of the dictionary supports the above types of data, for example: {"img": "/root/data1"}. |
list |
Supports passing in a list, where the list elements need to be the above types of data, such as [numpy.ndarray, numpy.ndarray], ["/root/data/img1.jpg", "/root/data/img2.jpg"], ["/root/data1", "/root/data2"], [{"img": "/root/data1"}, {"img": "/root/data2/img.jpg"}]. |
| Method | Description | Method Parameters |
|---|---|---|
| Print results to the terminal | - format_json: Boolean, whether to format the output with JSON indentation, default is True; - indent: Integer, JSON formatting setting, effective only when format_json is True, default is 4; - ensure_ascii: Boolean, JSON formatting setting, effective only when format_json is True, default is False; |
|
| save_to_json | Save results as a JSON file | - save_path: String, file path for saving; if it's a directory, the saved file name matches the input file name; - indent: Integer, JSON formatting setting, default is 4; - ensure_ascii: Boolean, JSON formatting setting, default is False; |
| save_to_img | Save results as an image file | - save_path: String, file path for saving; if it's a directory, the saved file name matches the input file name; |
| Parameter | Description | Type | Default |
|---|---|---|---|
data_root |
The root directory of the dataset to be added. The data organization method is the same as when building the feature library. Refer to Section 2.3 Data Organization for Feature Library Construction. | str |
None |
index_dir |
The save path of the feature library to which features are added. After successfully calling the add_index method, the face image features in data_root will be added to the face feature library originally saved at index_dir. |
str |
None |
| Parameter | Description | Type | Default |
|---|---|---|---|
data_root |
The root directory of the dataset to be deleted. The data organization method is the same as when building the feature library. Refer to Section 2.3 Data Organization for Feature Library Construction. | str |
None |
index_dir |
The save path of the feature library from which features are deleted. After successfully calling the delete_index method, the face image features in data_root will be deleted from the face feature library originally saved at index_dir. |
str |
None |
For main operations provided by the service:
200, and the attributes of the response body are as follows:| Name | Type | Meaning |
|---|---|---|
errorCode |
integer |
Error code. Fixed to 0. |
errorMsg |
string |
Error description. Fixed to "Success". |
The response body may also have a result attribute of type object, which stores the operation result information.
| Name | Type | Meaning |
|---|---|---|
errorCode |
integer |
Error code. Same as the response status code. |
errorMsg |
string |
Error description. |
The main operations provided by the service are as follows:
inferObtain OCR results for an image.
POST /ocr
| Name | Type | Meaning | Required |
|---|---|---|---|
image |
string |
The URL of an accessible image file or the Base64 encoded result of the image file content. | Yes |
inferenceParams |
object |
Inference parameters. | No |
The attributes of```markdown
import base64
import requests
API_URL = "http://localhost:8080/ocr" # Service URL
image_path = "./demo.jpg"
output_image_path = "./out.jpg"
# Encode the local image to Base64
with open(image_path, "rb") as file:
image_bytes = file.read()
image_data = base64.b64encode(image_bytes).decode("ascii")
payload = {"image": image_data} # Base64 encoded file content or image URL
# Call the API
response = requests.post(API_URL, json=payload)
# Process the response data
assert response.status_code == 200
result = response.json()["result"]
with open(output_image_path, "wb") as file:
file.write(base64.b64decode(result["image"]))
print(f"Output image saved at {output_image_path}")
print("\nDetected texts:")
print(result["texts"])
#include <iostream>
#include "cpp-httplib/httplib.h" // https://github.com/Huiyicc/cpp-httplib
#include "nlohmann/json.hpp" // https://github.com/nlohmann/json
#include "base64.hpp" // https://github.com/tobiaslocker/base64
int main() {
httplib::Client client("localhost:8080");
const std::string imagePath = "./demo.jpg";
const std::string outputImagePath = "./out.jpg";
httplib::Headers headers = {
{"Content-Type", "application/json"}
};
// Encode the local image to Base64
std::ifstream file(imagePath, std::ios::binary | std::ios::ate);
std::streamsize size = file.tellg();
file.seekg(0, std::ios::beg);
std::vector<char> buffer(size);
if (!file.read(buffer.data(), size)) {
std::cerr << "Error reading file." << std::endl;
return 1;
}
std::string bufferStr(reinterpret_cast<const char*>(buffer.data()), buffer.size());
std::string encodedImage = base64::to_base64(bufferStr);
nlohmann::json jsonObj;
jsonObj["image"] = encodedImage;
std::string body = jsonObj.dump();
// Call the API
auto response = client.Post("/ocr", headers, body, "application/json");
// Process the response data
if (response && response->status == 200) {
nlohmann::json jsonResponse = nlohmann::json::parse(response->body);
auto result = jsonResponse["result"];
encodedImage = result["image"];
std::string decodedString = base64::from_base64(encodedImage);
std::vector<unsigned char> decodedImage(decodedString.begin(), decodedString.end());
std::ofstream outputImage(outputImagePath, std::ios::binary | std::ios::out);
if (outputImage.is_open()) {
outputImage.write(reinterpret_cast<char*>(decodedImage.data()), decodedImage.size());
outputImage.close();
std::cout << "Output image saved at " << outputImagePath << std::endl;
} else {
std::cerr << "Unable to open file for writing: " << outputImagePath << std::endl;
}
auto texts = result["texts"];
std::cout << "\nDetected texts:" << std::endl;
for (const auto& text : texts) {
std::cout << text << std::endl;
}
} else {
std::cout << "Failed to send HTTP request." << std::endl;
return 1;
}
return 0;
}
import okhttp3.*;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.node.ObjectNode;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Base64;
public class Main {
public static void main(String[] args) throws IOException {
String API_URL = "http://localhost:8080/ocr"; // Service URL
String imagePath = "./demo.jpg"; // Local image path
String outputImagePath = "./out.jpg"; // Output image path
// Encode the local image to Base64
File file = new File(imagePath);
byte[] fileContent = java.nio.file.Files.readAllBytes(file.toPath());
String imageData = Base64.getEncoder().encodeToString(fileContent);
ObjectMapper objectMapper = new ObjectMapper();
ObjectNode params = objectMapper.createObjectNode();
params.put("image", imageData); // Base64-encoded file content or image URL
// Create an OkHttpClient instance
OkHttpClient client = new OkHttpClient();
MediaType JSON = MediaType.get("application/json; charset=utf-8");
RequestBody body = RequestBody.create(params.toString(), JSON);
Request request = new Request.Builder()
.url(API_URL)
.post(body)
.build();
// Call the API and process the response
try (Response response = client.newCall(request).execute()) {
if (response.isSuccessful()) {
String responseBody = response.body().string();
JsonNode resultNode = objectMapper.readTree(responseBody);
JsonNode result = resultNode.get("result");
String base64Image = result.get("image").asText();
JsonNode texts = result.get("texts");
byte[] imageBytes = Base64.getDecoder().decode(base64Image);
try (FileOutputStream fos = new FileOutputStream(outputImagePath)) {
fos.write(imageBytes);
}
System.out.println("Output image saved at " + outputImagePath);
System.out.println("\nDetected texts: " + texts.toString());
} else {
System.err.println("Request failed with code: " + response.code());
}
}
}
}
package main
import (
"bytes"
"encoding/base64"
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
)
func main() {
API_URL := "http://localhost:8080/ocr"
imagePath := "./demo.jpg"
outputImagePath := "./out.jpg"
// Encode the local image to Base64
imageBytes, err := ioutil.ReadFile(imagePath)
if err != nil {
fmt.Println("Error reading image file:", err)
return
}
imageData := base64.StdEncoding.EncodeToString(imageBytes)
payload := map[string]string{"image": imageData} // Base64-encoded file content or image URL
payloadBytes, err := json.Marshal(payload)
if err != nil {
fmt.Println("Error marshaling payload:", err)
return
}
// Call the API
client := &http.Client{}
req, err := http.NewRequest("POST", API_URL, bytes.NewBuffer(payloadBytes))
if err != nil {
fmt.Println("Error creating request:", err)
return
}
res, err := client.Do(req)
if err != nil {
fmt.Println("Error sending request:", err)
return
}
defer res.Body.Close()
// Process the response
body, err := ioutil.ReadAll(res.Body)
if err != nil {
fmt.Println("Error reading response body:", err)
return
}```markdown
# An English Tutorial on Artificial Intelligence and Computer Vision
This tutorial document is intended for numerous developers and covers content related to artificial intelligence and computer vision.
<details>
<summary>C#</summary>
```csharp
using System;
using System.IO;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Text;
using System.Threading.Tasks;
using Newtonsoft.Json.Linq;
class Program
{
static readonly string API_URL = "http://localhost:8080/ocr";
static readonly string imagePath = "./demo.jpg";
static readonly string outputImagePath = "./out.jpg";
static async Task Main(string[] args)
{
var httpClient = new HttpClient();
// Encode the local image to Base64
byte[] imageBytes = File.ReadAllBytes(imagePath);
string image_data = Convert.ToBase64String(imageBytes);
var payload = new JObject{ { "image", image_data } }; // Base64 encoded file content or image URL
var content = new StringContent(payload.ToString(), Encoding.UTF8, "application/json");
// Call the API
HttpResponseMessage response = await httpClient.PostAsync(API_URL, content);
response.EnsureSuccessStatusCode();
// Process the API response
string responseBody = await response.Content.ReadAsStringAsync();
JObject jsonResponse = JObject.Parse(responseBody);
string base64Image = jsonResponse["result"]["image"].ToString();
byte[] outputImageBytes = Convert.FromBase64String(base64Image);
File.WriteAllBytes(outputImagePath, outputImageBytes);
Console.WriteLine($"Output image saved at {outputImagePath}");
Console.WriteLine("\nDetected texts:");
Console.WriteLine(jsonResponse["result"]["texts"].ToString());
}
}
const axios = require('axios');
const fs = require('fs');
const API_URL = 'http://localhost:8080/ocr';
const imagePath = './demo.jpg';
const outputImagePath = "./out.jpg";
let config = {
method: 'POST',
maxBodyLength: Infinity,
url: API_URL,
data: JSON.stringify({
'image': encodeImageToBase64(imagePath) // Base64 encoded file content or image URL
})
};
// Encode the local image to Base64
function encodeImageToBase64(filePath) {
const bitmap = fs.readFileSync(filePath);
return Buffer.from(bitmap).toString('base64');
}
// Call the API
axios.request(config)
.then((response) => {
// Process the API response
const result = response.data["result"];
const imageBuffer = Buffer.from(result["image"], 'base64');
fs.writeFile(outputImagePath, imageBuffer, (err) => {
if (err) throw err;
console.log(`Output image saved at ${outputImagePath}`);
});
console.log("\nDetected texts:");
console.log(result["texts"]);
})
.catch((error) => {
console.log(error);
});