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bug fixes and image scan

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This commit is contained in:
Anthony Stirling 2023-04-26 13:18:24 +01:00
parent ab4aea315a
commit 4327af5133
13 changed files with 397 additions and 60 deletions
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6
Dockerfile
View file

@ -1,5 +1,9 @@
# Build jbig2enc in a separate stage
FROM frooodle/stirling-pdf-base:latest
FROM frooodle/stirling-pdf-base:beta
# Create pythonScripts folder and copy local scripts
RUN mkdir /pythonScripts
COPY ./pythonScripts/* /pythonScripts/
# Copy the application JAR file
COPY build/libs/*.jar app.jar

57
DockerfileBase
View file

@ -11,8 +11,8 @@ RUN apt-get update && \
pkg-config \
ca-certificates \
zlib1g-dev \
make \
g++
make \
g++
RUN git clone https://github.com/agl/jbig2enc && \
cd jbig2enc && \
@ -33,12 +33,57 @@ RUN apt-get update && \
libreoffice-calc \
libreoffice-impress \
python3-uno \
python3-pip \
python3-pip \
unoconv \
pngquant \
unpaper \
pngquant \
unpaper \
ocrmypdf && \
pip install --user --upgrade ocrmypdf
pip install --user --upgrade ocrmypdf && \
pip3 install opencv-python-headless
# Copy the jbig2enc binary from the builder stage
COPY --from=jbig2enc_builder /usr/local/bin/jbig2 /usr/local/bin/jbig2# Build jbig2enc in a separate stage
FROM debian:bullseye-slim as jbig2enc_builder
RUN apt-get update && \
apt-get install -y --no-install-recommends \
git \
automake \
autoconf \
libtool \
libleptonica-dev \
pkg-config \
ca-certificates \
zlib1g-dev \
make \
g++
RUN git clone https://github.com/agl/jbig2enc && \
cd jbig2enc && \
./autogen.sh && \
./configure && \
make && \
make install
# Main stage
FROM openjdk:17-jdk-slim
# Install necessary dependencies
RUN apt-get update && \
apt-get install -y --no-install-recommends \
libreoffice-core \
libreoffice-common \
libreoffice-writer \
libreoffice-calc \
libreoffice-impress \
python3-uno \
python3-pip \
unoconv \
pngquant \
unpaper \
ocrmypdf && \
pip install --user --upgrade ocrmypdf && \
pip3 install opencv-python-headless
# Copy the jbig2enc binary from the builder stage
COPY --from=jbig2enc_builder /usr/local/bin/jbig2 /usr/local/bin/jbig2

133
pythonScripts/split_photos.py Normal file
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@ -0,0 +1,133 @@
import sys
import cv2
import numpy as np
import os
def find_photo_boundaries(image, background_color, tolerance=30, min_area=10000, min_contour_area=500):
mask = cv2.inRange(image, background_color - tolerance, background_color + tolerance)
mask = cv2.bitwise_not(mask)
kernel = np.ones((5,5),np.uint8)
mask = cv2.dilate(mask, kernel, iterations=2)
contours, _ = cv2.findContours(mask, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)
photo_boundaries = []
for contour in contours:
x, y, w, h = cv2.boundingRect(contour)
area = w * h
contour_area = cv2.contourArea(contour)
if area >= min_area and contour_area >= min_contour_area:
photo_boundaries.append((x, y, w, h))
return photo_boundaries
def estimate_background_color(image, sample_points=5):
h, w, _ = image.shape
points = [
(0, 0),
(w - 1, 0),
(w - 1, h - 1),
(0, h - 1),
(w // 2, h // 2),
]
colors = []
for x, y in points:
colors.append(image[y, x])
return np.median(colors, axis=0)
def auto_rotate(image, angle_threshold=10):
gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
ret, binary = cv2.threshold(gray, 0, 255, cv2.THRESH_BINARY_INV + cv2.THRESH_OTSU)
contours, _ = cv2.findContours(binary, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)
if len(contours) == 0:
return image
largest_contour = max(contours, key=cv2.contourArea)
mu = cv2.moments(largest_contour)
if mu["m00"] == 0:
return image
x_centroid = int(mu["m10"] / mu["m00"])
y_centroid = int(mu["m01"] / mu["m00"])
coords = np.column_stack(np.where(binary > 0))
u, _, vt = np.linalg.svd(coords - np.array([[y_centroid, x_centroid]]), full_matrices=False)
angle = np.arctan2(u[1, 0], u[0, 0]) * 180 / np.pi
if angle < -45:
angle = -(90 + angle)
else:
angle = -angle
if abs(angle) < angle_threshold:
return image
(h, w) = image.shape[:2]
center = (w // 2, h // 2)
M = cv2.getRotationMatrix2D(center, angle, 1.0)
return cv2.warpAffine(image, M, (w, h), flags=cv2.INTER_CUBIC, borderMode=cv2.BORDER_REPLICATE)
def crop_borders(image, border_color, tolerance=30):
mask = cv2.inRange(image, border_color - tolerance, border_color + tolerance)
contours, _ = cv2.findContours(mask, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)
if len(contours) == 0:
return image
largest_contour = max(contours, key=cv2.contourArea)
x, y, w, h = cv2.boundingRect(largest_contour)
return image[y:y+h, x:x+w]
def split_photos(input_file, output_directory, tolerance=30, min_area=10000, min_contour_area=500, angle_threshold=10, border_size=10):
image = cv2.imread(input_file)
background_color = estimate_background_color(image)
# Add a constant border around the image
image = cv2.copyMakeBorder(image, border_size, border_size, border_size, border_size, cv2.BORDER_CONSTANT, value=background_color)
photo_boundaries = find_photo_boundaries(image, background_color, tolerance)
if not os.path.exists(output_directory):
os.makedirs(output_directory)
# Get the input file's base name without the extension
input_file_basename = os.path.splitext(os.path.basename(input_file))[0]
for idx, (x, y, w, h) in enumerate(photo_boundaries):
cropped_image = image[y:y+h, x:x+w]
cropped_image = auto_rotate(cropped_image, angle_threshold)
# Remove the added border
cropped_image = cropped_image[border_size:-border_size, border_size:-border_size]
output_path = os.path.join(output_directory, f"{input_file_basename}_{idx+1}.png")
cv2.imwrite(output_path, cropped_image)
print(f"Saved {output_path}")
if __name__ == "__main__":
if len(sys.argv) < 2:
print("Usage: python3 split_photos.py <input_file> <output_directory> [tolerance] [min_area] [min_contour_area] [angle_threshold] [border_size]")
print("\nParameters:")
print(" <input_file> - The input scanned image containing multiple photos.")
print(" <output_directory> - The directory where the result images should be placed.")
print(" [tolerance] - Optional. Determines the range of color variation around the estimated background color (default: 30).")
print(" [min_area] - Optional. Sets the minimum area threshold for a photo (default: 10000).")
print(" [min_contour_area] - Optional. Sets the minimum contour area threshold for a photo (default: 500).")
print(" [angle_threshold] - Optional. Sets the minimum absolute angle required for the image to be rotated (default: 10).")
print(" [border_size] - Optional. Sets the size of the border added and removed to prevent white borders in the output (default: 10).")
sys.exit(1)
input_file = sys.argv[1]
output_directory = sys.argv[2]
tolerance = int(sys.argv[3]) if len(sys.argv) > 3 else 20
min_area = int(sys.argv[4]) if len(sys.argv) > 4 else 8000
min_contour_area = int(sys.argv[5]) if len(sys.argv) > 5 else 500
angle_threshold = int(sys.argv[6]) if len(sys.argv) > 6 else 60
split_photos(input_file, output_directory, tolerance=tolerance, min_area=min_area, min_contour_area=min_contour_area, angle_threshold=angle_threshold)

8
src/main/java/stirling/software/SPDF/controller/converters/ConvertPDFToPDFA.java
View file

@ -6,8 +6,6 @@ import java.nio.file.Path;
import java.util.ArrayList;
import java.util.List;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
@ -16,6 +14,7 @@ import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;
import stirling.software.SPDF.utils.PdfUtils;
import stirling.software.SPDF.utils.ProcessExecutor;
@Controller
@ -52,10 +51,7 @@ public class ConvertPDFToPDFA {
// Return the optimized PDF as a response
String outputFilename = inputFile.getOriginalFilename().replaceFirst("[.][^.]+$", "") + "_PDFA.pdf";
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_PDF);
headers.setContentDispositionFormData("attachment", outputFilename);
return ResponseEntity.ok().headers(headers).body(pdfBytes);
return PdfUtils.bytesToWebResponse(pdfBytes, outputFilename);
}
@GetMapping("/pdf-to-pdfa")

8
src/main/java/stirling/software/SPDF/controller/other/CompressController.java
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@ -8,8 +8,6 @@ import java.util.List;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
@ -18,6 +16,7 @@ import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;
import stirling.software.SPDF.utils.PdfUtils;
import stirling.software.SPDF.utils.ProcessExecutor;
@Controller
@ -78,10 +77,7 @@ public class CompressController {
// Return the optimized PDF as a response
String outputFilename = inputFile.getOriginalFilename().replaceFirst("[.][^.]+$", "") + "_Optimized.pdf";
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_PDF);
headers.setContentDispositionFormData("attachment", outputFilename);
return ResponseEntity.ok().headers(headers).body(pdfBytes);
return PdfUtils.bytesToWebResponse(pdfBytes, outputFilename);
}
}

145
src/main/java/stirling/software/SPDF/controller/other/ExtractImageScansController.java Normal file
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@ -0,0 +1,145 @@
package stirling.software.SPDF.controller.other;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.StandardCopyOption;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
import javax.imageio.ImageIO;
import org.apache.commons.io.FileUtils;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.PDFRenderer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.servlet.ModelAndView;
import stirling.software.SPDF.utils.PdfUtils;
import stirling.software.SPDF.utils.ProcessExecutor;
@Controller
public class ExtractImageScansController {
private static final Logger logger = LoggerFactory.getLogger(ExtractImageScansController.class);
@GetMapping("/extract-image-scans")
public ModelAndView extractImageScansForm() {
ModelAndView modelAndView = new ModelAndView("other/extract-image-scans");
modelAndView.addObject("currentPage", "extract-image-scans");
return modelAndView;
}
@PostMapping("/extract-image-scans")
public ResponseEntity<byte[]> extractImageScans(@RequestParam("fileInput") MultipartFile inputFile,
@RequestParam(name = "angle_threshold", defaultValue = "5") int angleThreshold,
@RequestParam(name = "tolerance", defaultValue = "20") int tolerance,
@RequestParam(name = "min_area", defaultValue = "8000") int minArea,
@RequestParam(name = "min_contour_area", defaultValue = "500") int minContourArea) throws IOException, InterruptedException {
String fileName = inputFile.getOriginalFilename();
String extension = fileName.substring(fileName.lastIndexOf(".") + 1);
List<String> images = new ArrayList<>();
// Check if input file is a PDF
if (extension.equalsIgnoreCase("pdf")) {
// Load PDF document
try (PDDocument document = PDDocument.load(new ByteArrayInputStream(inputFile.getBytes()))) {
PDFRenderer pdfRenderer = new PDFRenderer(document);
int pageCount = document.getNumberOfPages();
images = new ArrayList<>();
// Create images of all pages
for (int i = 0; i < pageCount; i++) {
// Create temp file to save the image
Path tempFile = Files.createTempFile("image_", ".png");
// Render image and save as temp file
BufferedImage image = pdfRenderer.renderImageWithDPI(i, 300);
ImageIO.write(image, "png", tempFile.toFile());
// Add temp file path to images list
images.add(tempFile.toString());
}
}
} else {
Path tempInputFile = Files.createTempFile("input_", "." + extension);
Files.copy(inputFile.getInputStream(), tempInputFile, StandardCopyOption.REPLACE_EXISTING);
// Add input file path to images list
images.add(tempInputFile.toString());
}
List<byte[]> processedImageBytes = new ArrayList<>();
// Process each image
for (int i = 0; i < images.size(); i++) {
Path tempDir = Files.createTempDirectory("openCV_output");
List<String> command = new ArrayList<>(Arrays.asList("python3", "/pythonScripts/split_photos.py", images.get(i), tempDir.toString(), String.valueOf(angleThreshold), String.valueOf(tolerance),String.valueOf(minArea),String.valueOf(minContourArea)));
// Run CLI command
int returnCode = ProcessExecutor.getInstance(ProcessExecutor.Processes.PYTHON_OPENCV).runCommandWithOutputHandling(command);
// Read the output photos in temp directory
List<Path> tempOutputFiles = Files.list(tempDir).sorted().collect(Collectors.toList());
for (Path tempOutputFile : tempOutputFiles) {
byte[] imageBytes = Files.readAllBytes(tempOutputFile);
processedImageBytes.add(imageBytes);
}
// Clean up the temporary directory
FileUtils.deleteDirectory(tempDir.toFile());
}
// Create zip file if multiple images
if (processedImageBytes.size() > 1) {
String outputZipFilename = fileName.replaceFirst("[.][^.]+$", "") + "_processed.zip";
Path tempZipFile = Files.createTempFile("output_", ".zip");
try (ZipOutputStream zipOut = new ZipOutputStream(new FileOutputStream(tempZipFile.toFile()))) {
// Add processed images to the zip
for (int i = 0; i < processedImageBytes.size(); i++) {
ZipEntry entry = new ZipEntry(fileName.replaceFirst("[.][^.]+$", "") + "_" + (i+1) + ".png");
zipOut.putNextEntry(entry);
zipOut.write(processedImageBytes.get(i));
zipOut.closeEntry();
}
}
byte[] zipBytes = Files.readAllBytes(tempZipFile);
// Clean up the temporary zip file
Files.delete(tempZipFile);
return PdfUtils.bytesToWebResponse(zipBytes, outputZipFilename, MediaType.APPLICATION_OCTET_STREAM);
} else {
// Return the processed image as a response
byte[] imageBytes = processedImageBytes.get(0);
return PdfUtils.bytesToWebResponse(imageBytes, fileName.replaceFirst("[.][^.]+$", "") + ".png", MediaType.IMAGE_PNG);
}
}
}

22
src/main/java/stirling/software/SPDF/controller/other/ExtractImagesController.java
View file

@ -18,10 +18,6 @@ import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.pdmodel.graphics.image.PDImageXObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.io.ByteArrayResource;
import org.springframework.core.io.Resource;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
@ -31,13 +27,15 @@ import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;
import stirling.software.SPDF.utils.PdfUtils;
@Controller
public class ExtractImagesController {
private static final Logger logger = LoggerFactory.getLogger(ExtractImagesController.class);
@PostMapping("/extract-images")
public ResponseEntity<Resource> extractImages(@RequestParam("fileInput") MultipartFile file, @RequestParam("format") String format) throws IOException {
public ResponseEntity<byte[]> extractImages(@RequestParam("fileInput") MultipartFile file, @RequestParam("format") String format) throws IOException {
System.out.println(System.currentTimeMillis() + "file=" + file.getName() + ", format=" + format);
PDDocument document = PDDocument.load(file.getBytes());
@ -98,18 +96,8 @@ public class ExtractImagesController {
// Create ByteArrayResource from byte array
byte[] zipContents = baos.toByteArray();
ByteArrayResource resource = new ByteArrayResource(zipContents);
// Set content disposition header to indicate that the response should be
// downloaded as a file
HttpHeaders headers = new HttpHeaders();
headers.setContentLength(zipContents.length);
headers.add(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=" + file.getOriginalFilename().replaceFirst("[.][^.]+$", "") + "_extracted-images.zip");
// Return ResponseEntity with ByteArrayResource and headers
return ResponseEntity.status(HttpStatus.OK).headers(headers)
.header("Cache-Control", "no-cache").contentType(MediaType.APPLICATION_OCTET_STREAM).body(resource);
return PdfUtils.boasToWebResponse(baos, file.getOriginalFilename().replaceFirst("[.][^.]+$", "") + "_extracted-images.zip", MediaType.APPLICATION_OCTET_STREAM);
}
@GetMapping("/extract-images")

14
src/main/java/stirling/software/SPDF/controller/other/OCRController.java
View file

@ -17,7 +17,6 @@ import java.util.zip.ZipOutputStream;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
@ -27,6 +26,7 @@ import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.servlet.ModelAndView;
import stirling.software.SPDF.utils.PdfUtils;
import stirling.software.SPDF.utils.ProcessExecutor;
@Controller
@ -123,8 +123,6 @@ public class OCRController {
// Return the OCR processed PDF as a response
String outputFilename = inputFile.getOriginalFilename().replaceFirst("[.][^.]+$", "") + "_OCR.pdf";
HttpHeaders headers = new HttpHeaders();
if (sidecar != null && sidecar) {
// Create a zip file containing both the PDF and the text file
String outputZipFilename = inputFile.getOriginalFilename().replaceFirst("[.][^.]+$", "") + "_OCR.zip";
@ -150,17 +148,13 @@ public class OCRController {
Files.delete(tempZipFile);
Files.delete(tempOutputFile);
Files.delete(sidecarTextPath);
// Return the zip file containing both the PDF and the text file
headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
headers.setContentDispositionFormData("attachment", outputZipFilename);
return ResponseEntity.ok().headers(headers).body(zipBytes);
return PdfUtils.bytesToWebResponse(pdfBytes, outputZipFilename, MediaType.APPLICATION_OCTET_STREAM);
} else {
// Return the OCR processed PDF as a response
Files.delete(tempOutputFile);
headers.setContentType(MediaType.APPLICATION_PDF);
headers.setContentDispositionFormData("attachment", outputFilename);
return ResponseEntity.ok().headers(headers).body(pdfBytes);
return PdfUtils.bytesToWebResponse(pdfBytes, outputFilename);
}
}

13
src/main/java/stirling/software/SPDF/utils/PDFToFile.java
View file

@ -15,7 +15,6 @@ import java.util.zip.ZipOutputStream;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
@ -41,8 +40,7 @@ public class PDFToFile {
Path tempInputFile = null;
Path tempOutputDir = null;
byte[] fileBytes;
// Prepare response
HttpHeaders headers = new HttpHeaders();
String fileName = "temp.file";
try {
// Save the uploaded file to a temporary location
@ -60,19 +58,18 @@ public class PDFToFile {
// Get output files
List<File> outputFiles = Arrays.asList(tempOutputDir.toFile().listFiles());
if (outputFiles.size() == 1) {
// Return single output file
File outputFile = outputFiles.get(0);
headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
if (outputFormat.equals("txt:Text")) {
outputFormat = "txt";
}
headers.setContentDispositionFormData("attachment", pdfBaseName + "." + outputFormat);
fileName = pdfBaseName + "." + outputFormat;
fileBytes = FileUtils.readFileToByteArray(outputFile);
} else {
// Return output files in a ZIP archive
headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
headers.setContentDispositionFormData("attachment", pdfBaseName + "To" + outputFormat + ".zip");
fileName = pdfBaseName + "To" + outputFormat + ".zip";
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
ZipOutputStream zipOutputStream = new ZipOutputStream(byteArrayOutputStream);
@ -96,6 +93,6 @@ public class PDFToFile {
if (tempOutputDir != null)
FileUtils.deleteDirectory(tempOutputDir.toFile());
}
return new ResponseEntity<>(fileBytes, headers, HttpStatus.OK);
return PdfUtils.bytesToWebResponse(fileBytes, fileName, MediaType.APPLICATION_OCTET_STREAM);
}
}

18
src/main/java/stirling/software/SPDF/utils/PdfUtils.java
View file

@ -8,6 +8,8 @@ import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.security.KeyPair;
import java.security.KeyStore;
@ -43,18 +45,26 @@ public class PdfUtils {
public static ResponseEntity<byte[]> boasToWebResponse(ByteArrayOutputStream baos, String docName) throws IOException {
return PdfUtils.bytesToWebResponse(baos.toByteArray(), docName);
}
public static ResponseEntity<byte[]> bytesToWebResponse(byte[] bytes, String docName) throws IOException {
public static ResponseEntity<byte[]> boasToWebResponse(ByteArrayOutputStream baos, String docName, MediaType mediaType) throws IOException {
return PdfUtils.bytesToWebResponse(baos.toByteArray(), docName, mediaType );
}
public static ResponseEntity<byte[]> bytesToWebResponse(byte[] bytes, String docName, MediaType mediaType ) throws IOException {
// Return the PDF as a response
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_PDF);
headers.setContentType(mediaType);
headers.setContentLength(bytes.length);
headers.setContentDispositionFormData("attachment", docName);
String encodedDocName = URLEncoder.encode(docName, StandardCharsets.UTF_8.toString()).replaceAll("\\+", "%20");
headers.setContentDispositionFormData("attachment", encodedDocName);
return new ResponseEntity<>(bytes, headers, HttpStatus.OK);
}
public static ResponseEntity<byte[]> bytesToWebResponse(byte[] bytes, String docName) throws IOException {
return bytesToWebResponse(bytes, docName, MediaType.APPLICATION_PDF);
}
public static byte[] convertFromPdf(byte[] inputStream, String imageType, ImageType colorType, boolean singleImage, int DPI) throws IOException, Exception {
try (PDDocument document = PDDocument.load(new ByteArrayInputStream(inputStream))) {

3
src/main/java/stirling/software/SPDF/utils/ProcessExecutor.java
View file

@ -13,7 +13,7 @@ import java.util.concurrent.Semaphore;
public class ProcessExecutor {
public enum Processes {
LIBRE_OFFICE, OCR_MY_PDF
LIBRE_OFFICE, OCR_MY_PDF, PYTHON_OPENCV
}
private static final Map<Processes, ProcessExecutor> instances = new ConcurrentHashMap<>();
@ -23,6 +23,7 @@ public class ProcessExecutor {
int semaphoreLimit = switch (key) {
case LIBRE_OFFICE -> 1;
case OCR_MY_PDF -> 2;
case PYTHON_OPENCV -> 8;
};
return new ProcessExecutor(semaphoreLimit);
});

2
src/main/resources/templates/fragments/common.html
View file

@ -136,7 +136,7 @@ document.addEventListener("DOMContentLoaded", function () {
const contentDispositionHeader = response.headers.get('Content-Disposition');
console.log(contentDispositionHeader)
if (contentDispositionHeader && contentDispositionHeader.indexOf('attachment') !== -1) {
filename = contentDispositionHeader.split('filename=')[1].replace(/"/g, '');
filename = decodeURIComponent(contentDispositionHeader.split('filename=')[1].replace(/"/g, ''));
} else {
// If the Content-Disposition header is not present or does not contain the filename, use a default filename
filename = 'download';

28
src/main/resources/templates/other/extract-image-scans.html Normal file
View file

@ -0,0 +1,28 @@
<!DOCTYPE html>
<html th:lang="${#locale.toString()}" th:lang-direction="#{language.direction}" xmlns:th="http://www.thymeleaf.org">
<th:block th:insert="~{fragments/common :: head(title=#{extractImageScans.title})}"></th:block>
<body>
<div id="page-container">
<div id="content-wrap">
<div th:insert="~{fragments/navbar.html :: navbar}"></div>
<br> <br>
<div class="container">
<div class="row justify-content-center">
<div class="col-md-6">
<h2 th:text="#{extractImageScans.header}"></h2>
<form id="multiPdfForm" th:action="@{extract-image-scans}" method="post" enctype="multipart/form-data">
<div th:replace="~{fragments/common :: fileSelector(name='fileInput', multiple=false, accept='image/*, application/pdf')}"></div>
<button type="submit" id="submitBtn" class="btn btn-primary" th:text="#{extractImageScans.submit}"></button>
</form>
</div>
</div>
</div>
</div>
<div th:insert="~{fragments/footer.html :: footer}"></div>
</div>
</body>
</html>