Implement distort_image in text2image - default false

tesseract-ocr · Feb 22, 2019 · 2aded47 · 2aded47
1 parent 49ed3a7
commit 2aded47
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Showing 2 changed files with 33 additions and 5 deletions.
diff --git a/src/training/degradeimage.cpp b/src/training/degradeimage.cpp
@@ -169,10 +169,10 @@ Pix* DegradeImage(Pix* input, int exposure, TRand* randomizer,
     data += input->wpl;
   }
 
-  pix = input;
-  input = PrepareDistortedPix(pix, false, true, true, true, true,
-                          1, randomizer, nullptr);
-  pixDestroy(&pix);
+//  pix = input;
+//  input = PrepareDistortedPix(pix, false, true, true, true, true,
+//                          1, randomizer, nullptr);
+//  pixDestroy(&pix);
 
   return input;
 }
@@ -215,7 +215,7 @@ Pix* PrepareDistortedPix(const Pix* pix, bool perspective, bool invert,
         (*boxes)[b].set_right((*boxes)[b].left() + 1);
     }
   }
-  if (invert && randomizer->SignedRand(1.0) < -0.5)
+  if (invert && randomizer->SignedRand(1.0) < -0.9)
     pixInvert(distorted, distorted);
   return distorted;
 }

diff --git a/src/training/text2image.cpp b/src/training/text2image.cpp
@@ -74,6 +74,28 @@ BOOL_PARAM_FLAG(rotate_image, true, "Rotate the image in a random way.");
 // Degradation to apply to the image.
 INT_PARAM_FLAG(exposure, 0, "Exposure level in photocopier");
 
+// Distort the rendered image by various means according to the bool flags.
+BOOL_PARAM_FLAG(distort_image, false,
+                "Degrade rendered image with noise, blur, invert.");
+
+// Distortion to apply to the image.
+BOOL_PARAM_FLAG(invert, true, "Invert the image");
+
+// Distortion to apply to the image.
+BOOL_PARAM_FLAG(white_noise, true, "Add  Gaussian Noise");
+
+// Distortion to apply to the image.
+BOOL_PARAM_FLAG(smooth_noise, true, "Smoothen Noise");
+
+// Distortion to apply to the image.
+BOOL_PARAM_FLAG(blur, true, "Blur the image");
+
+// Distortion to apply to the image.
+//BOOL_PARAM_FLAG(perspective, false, "Generate Perspective Distortion");
+
+// Distortion to apply to the image.
+//INT_PARAM_FLAG(box_reduction, 0, "Integer reduction factor box_scale");
+
 // Output image resolution.
 INT_PARAM_FLAG(resolution, 300, "Pixels per inch");
 
@@ -619,6 +641,12 @@ static int Main() {
           pix = DegradeImage(pix, FLAGS_exposure, &randomizer,
                              FLAGS_rotate_image ? &rotation : nullptr);
         }
+        if (FLAGS_distort_image) {
+         //Todo: perspective is set to false and box_reduction to 1.
+          pix = PrepareDistortedPix(pix, false, FLAGS_invert,
+                             FLAGS_white_noise, FLAGS_smooth_noise, FLAGS_blur,
+                             1, &randomizer, nullptr);
+        }
         render.RotatePageBoxes(rotation);
 
         if (pass == 0) {