Upload an image to improve its quality, resolution, and clarity
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Enhanced Image
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import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.annotation.*;
import java.io.*;
import java.nio.file.*;
import java.awt.image.*;
import javax.imageio.*;
import java.util.*;
@WebServlet("/enhance")
@MultipartConfig
public class ImageEnhancerServlet extends HttpServlet {
// This would be replaced with actual image processing libraries
private static final Map DEMO_RESULTS = Map.of(
"2x", "enhanced_2x.jpg",
"4x", "enhanced_4x.jpg",
"denoise", "enhanced_denoise.jpg",
"sharpen", "enhanced_sharpen.jpg"
);
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// Get the uploaded file and enhancement option
Part filePart = request.getPart("image");
String option = request.getParameter("option");
// Create upload directory if it doesn't exist
String uploadPath = getServletContext().getRealPath("") + File.separator + "uploads";
File uploadDir = new File(uploadPath);
if (!uploadDir.exists()) uploadDir.mkdir();
// Save the uploaded file
String fileName = Paths.get(filePart.getSubmittedFileName()).getFileName().toString();
String filePath = uploadPath + File.separator + fileName;
try (InputStream fileContent = filePart.getInputStream()) {
Files.copy(fileContent, Paths.get(filePath), StandardCopyOption.REPLACE_EXISTING);
}
// Process the image (in a real app, you would use OpenCV, ImageMagick, etc.)
String enhancedFileName = processImage(filePath, option);
String enhancedFilePath = uploadPath + File.separator + enhancedFileName;
// Prepare the response
response.setContentType("application/json");
PrintWriter out = response.getWriter();
out.print("{\"status\":\"success\",\"enhancedImageUrl\":\"" +
request.getContextPath() + "/uploads/" + enhancedFileName + "\"}");
}
// In a real implementation, this would contain actual image processing logic
private String processImage(String inputPath, String option) throws IOException {
// For demo purposes, we'll just return a pre-made image
// In reality, you would:
// 1. Load the image using BufferedImage or a library like OpenCV
// 2. Apply the selected enhancement
// 3. Save the enhanced image
String outputFileName = "enhanced_" + System.currentTimeMillis() + ".jpg";
String outputPath = new File(inputPath).getParent() + File.separator + outputFileName;
// This is where you would add your actual image processing code
// For now, we'll just copy a demo result
try (InputStream is = getClass().getResourceAsStream("/" + DEMO_RESULTS.get(option));
OutputStream os = new FileOutputStream(outputPath)) {
if (is != null) {
byte[] buffer = new byte[1024];
int bytesRead;
while ((bytesRead = is.read(buffer)) != -1) {
os.write(buffer, 0, bytesRead);
}
}
}
return outputFileName;
}
}