From 7f0fb149a90b6ca00602ff8f0a43887cf4e51f2c Mon Sep 17 00:00:00 2001
From: Kilian Schuettler <kilian.schuettler@knecon.com>
Date: Thu, 4 Apr 2024 17:03:37 +0200
Subject: [PATCH] RED-8800: fix text location for weird mediaboxes

---
 .../ocr/processor/model/PageInformation.java  | 36 +++++++++++++++++--
 .../processor/model/RenderedPageOcrImage.java | 10 +-----
 .../threads/ImageProcessingThread.java        |  2 +-
 3 files changed, 35 insertions(+), 13 deletions(-)

diff --git a/ocr-service-v1/ocr-service-processor/src/main/java/com/knecon/fforesight/service/ocr/processor/model/PageInformation.java b/ocr-service-v1/ocr-service-processor/src/main/java/com/knecon/fforesight/service/ocr/processor/model/PageInformation.java
index 771b53a..ec4329a 100644
--- a/ocr-service-v1/ocr-service-processor/src/main/java/com/knecon/fforesight/service/ocr/processor/model/PageInformation.java
+++ b/ocr-service-v1/ocr-service-processor/src/main/java/com/knecon/fforesight/service/ocr/processor/model/PageInformation.java
@@ -1,12 +1,42 @@
 package com.knecon.fforesight.service.ocr.processor.model;
 
-import org.apache.pdfbox.pdmodel.PDPage;
+import java.awt.geom.Rectangle2D;
 
-public record PageInformation(int height, int width, int number, int rotationDegrees) {
+import org.apache.pdfbox.pdmodel.PDPage;
+import org.apache.pdfbox.pdmodel.common.PDRectangle;
+
+public record PageInformation(Rectangle2D mediabox, int number, int rotationDegrees) {
 
     public static PageInformation fromPDPage(int pageNum, PDPage page) {
 
-        return new PageInformation((int) page.getMediaBox().getHeight(), (int) page.getMediaBox().getWidth(), pageNum, page.getRotation());
+        PDRectangle mediaBox = page.getMediaBox();
+        return new PageInformation(new Rectangle2D.Double(mediaBox.getLowerLeftX(), mediaBox.getLowerLeftY(), mediaBox.getWidth(), mediaBox.getHeight()),
+                                   pageNum,
+                                   page.getRotation());
+    }
+
+
+    public double height() {
+
+        return mediabox.getHeight();
+    }
+
+
+    public double width() {
+
+        return mediabox.getWidth();
+    }
+
+
+    public double minX() {
+
+        return mediabox.getX();
+    }
+
+
+    public double minY() {
+
+        return mediabox.getY();
     }
 
 }
diff --git a/ocr-service-v1/ocr-service-processor/src/main/java/com/knecon/fforesight/service/ocr/processor/model/RenderedPageOcrImage.java b/ocr-service-v1/ocr-service-processor/src/main/java/com/knecon/fforesight/service/ocr/processor/model/RenderedPageOcrImage.java
index efdadc7..e91456d 100644
--- a/ocr-service-v1/ocr-service-processor/src/main/java/com/knecon/fforesight/service/ocr/processor/model/RenderedPageOcrImage.java
+++ b/ocr-service-v1/ocr-service-processor/src/main/java/com/knecon/fforesight/service/ocr/processor/model/RenderedPageOcrImage.java
@@ -1,20 +1,12 @@
 package com.knecon.fforesight.service.ocr.processor.model;
 
 import java.awt.geom.AffineTransform;
-import java.awt.geom.Point2D;
-
-import org.apache.pdfbox.pdmodel.PDDocument;
-import org.apache.pdfbox.pdmodel.PDPage;
 
 import lombok.AccessLevel;
 import lombok.Getter;
 import lombok.RequiredArgsConstructor;
-import lombok.Setter;
-import lombok.SneakyThrows;
 import lombok.experimental.FieldDefaults;
-import net.sourceforge.lept4j.Leptonica1;
 import net.sourceforge.lept4j.Pix;
-import net.sourceforge.tess4j.ITessAPI;
 
 @Getter
 @RequiredArgsConstructor
@@ -32,7 +24,7 @@ public class RenderedPageOcrImage implements OcrImage {
     public AffineTransform getImageCTM() {
 
         double scalingFactor = calculateScalingFactor();
-        AffineTransform imageToCropBoxScaling = new AffineTransform(scalingFactor, 0, 0, scalingFactor, 0, 0);
+        AffineTransform imageToCropBoxScaling = new AffineTransform(scalingFactor, 0, 0, scalingFactor, -pageInformation.minX(), -pageInformation.minY());
 
         AffineTransform mirrorMatrix = new AffineTransform(1, 0, 0, -1, 0, pageInformation.height());
 
diff --git a/ocr-service-v1/ocr-service-processor/src/main/java/com/knecon/fforesight/service/ocr/processor/service/threads/ImageProcessingThread.java b/ocr-service-v1/ocr-service-processor/src/main/java/com/knecon/fforesight/service/ocr/processor/service/threads/ImageProcessingThread.java
index 8825b45..1f233e5 100644
--- a/ocr-service-v1/ocr-service-processor/src/main/java/com/knecon/fforesight/service/ocr/processor/service/threads/ImageProcessingThread.java
+++ b/ocr-service-v1/ocr-service-processor/src/main/java/com/knecon/fforesight/service/ocr/processor/service/threads/ImageProcessingThread.java
@@ -45,7 +45,7 @@ public class ImageProcessingThread extends Thread {
     final BlockingQueue<UnprocessedImage> imageInputQueue;
     final BlockingQueue<OcrImage> imageOutputQueue;
     final ITessAPI.TessBaseAPI detectionScriptHandle = initDetectionScriptHandle();
-    final L_Kernel gaussianKernel = Leptonica1.makeGaussianKernel(2, 2, 1.2f, 1);
+    final L_Kernel gaussianKernel = Leptonica1.makeGaussianKernel(2, 2, 1.0f, 1);
     final Statistics stats;
     final OcrServiceSettings settings;
     final PDDocument document;