fix: Correct scaling of debug visualizations, tune OCR (#700)

* fix: Correct scaling of debug visualizations, tune OCR

Signed-off-by: Christoph Auer <cau@zurich.ibm.com>

* chore: remove unused imports

Signed-off-by: Christoph Auer <cau@zurich.ibm.com>

* chore: Update docling-core

Signed-off-by: Christoph Auer <cau@zurich.ibm.com>

---------

Signed-off-by: Christoph Auer <cau@zurich.ibm.com>

docling/models/base_ocr_model.py

@@ -138,18 +138,31 @@ class BaseOcrModel(BasePageModel):
 
     def draw_ocr_rects_and_cells(self, conv_res, page, ocr_rects, show: bool = False):
         image = copy.deepcopy(page.image)
+        scale_x = image.width / page.size.width
+        scale_y = image.height / page.size.height
+
         draw = ImageDraw.Draw(image, "RGBA")
 
         # Draw OCR rectangles as yellow filled rect
         for rect in ocr_rects:
             x0, y0, x1, y1 = rect.as_tuple()
+            y0 *= scale_x
+            y1 *= scale_y
+            x0 *= scale_x
+            x1 *= scale_x
+
             shade_color = (255, 255, 0, 40)  # transparent yellow
             draw.rectangle([(x0, y0), (x1, y1)], fill=shade_color, outline=None)
 
         # Draw OCR and programmatic cells
         for tc in page.cells:
             x0, y0, x1, y1 = tc.bbox.as_tuple()
-            color = "red"
+            y0 *= scale_x
+            y1 *= scale_y
+            x0 *= scale_x
+            x1 *= scale_x
+
+            color = "gray"
             if isinstance(tc, OcrCell):
                 color = "magenta"
             draw.rectangle([(x0, y0), (x1, y1)], outline=color)

docling/models/layout_model.py

@@ -67,29 +67,9 @@ class LayoutModel(BasePageModel):
         - Right: Clusters including FORM, KEY_VALUE_REGION, and PICTURE.
         Includes label names and confidence scores for each cluster.
         """
-        label_to_color = {
+        scale_x = page.image.width / page.size.width
-            DocItemLabel.TEXT: (255, 255, 153),  # Light Yellow
+        scale_y = page.image.height / page.size.height
-            DocItemLabel.CAPTION: (255, 204, 153),  # Light Orange
+
-            DocItemLabel.LIST_ITEM: (153, 153, 255),  # Light Purple
-            DocItemLabel.FORMULA: (192, 192, 192),  # Gray
-            DocItemLabel.TABLE: (255, 204, 204),  # Light Pink
-            DocItemLabel.PICTURE: (255, 204, 164),  # Light Beige
-            DocItemLabel.SECTION_HEADER: (255, 153, 153),  # Light Red
-            DocItemLabel.PAGE_HEADER: (204, 255, 204),  # Light Green
-            DocItemLabel.PAGE_FOOTER: (
-                204,
-                255,
-                204,
-            ),  # Light Green (same as Page-Header)
-            DocItemLabel.TITLE: (255, 153, 153),  # Light Red (same as Section-Header)
-            DocItemLabel.FOOTNOTE: (200, 200, 255),  # Light Blue
-            DocItemLabel.DOCUMENT_INDEX: (220, 220, 220),  # Light Gray
-            DocItemLabel.CODE: (125, 125, 125),  # Gray
-            DocItemLabel.CHECKBOX_SELECTED: (255, 182, 193),  # Pale Green
-            DocItemLabel.CHECKBOX_UNSELECTED: (255, 182, 193),  # Light Pink
-            DocItemLabel.FORM: (200, 255, 255),  # Light Cyan
-            DocItemLabel.KEY_VALUE_REGION: (183, 65, 14),  # Rusty orange
-        }
         # Filter clusters for left and right images
         exclude_labels = {
             DocItemLabel.FORM,
@@ -118,6 +98,11 @@ class LayoutModel(BasePageModel):
                     cell_color = (0, 0, 0, 40)  # Transparent black for cells
                     for tc in c.cells:
                         cx0, cy0, cx1, cy1 = tc.bbox.as_tuple()
+                        cx0 *= scale_x
+                        cx1 *= scale_x
+                        cy0 *= scale_x
+                        cy1 *= scale_y
+
                         draw.rectangle(
                             [(cx0, cy0), (cx1, cy1)],
                             outline=None,
@@ -125,8 +110,16 @@ class LayoutModel(BasePageModel):
                         )
                     # Draw cluster rectangle
                     x0, y0, x1, y1 = c.bbox.as_tuple()
-                    cluster_fill_color = (*list(label_to_color.get(c.label)), 70)
+                    x0 *= scale_x
-                    cluster_outline_color = (*list(label_to_color.get(c.label)), 255)
+                    x1 *= scale_x
+                    y0 *= scale_x
+                    y1 *= scale_y
+
+                    cluster_fill_color = (*list(DocItemLabel.get_color(c.label)), 70)
+                    cluster_outline_color = (
+                        *list(DocItemLabel.get_color(c.label)),
+                        255,
+                    )
                     draw.rectangle(
                         [(x0, y0), (x1, y1)],
                         outline=cluster_outline_color,

docling/models/table_structure_model.py

@@ -66,23 +66,43 @@ class TableStructureModel(BasePageModel):
         show: bool = False,
     ):
         assert page._backend is not None
+        assert page.size is not None
 
         image = (
             page._backend.get_page_image()
         )  # make new image to avoid drawing on the saved ones
+
+        scale_x = image.width / page.size.width
+        scale_y = image.height / page.size.height
+
         draw = ImageDraw.Draw(image)
 
         for table_element in tbl_list:
             x0, y0, x1, y1 = table_element.cluster.bbox.as_tuple()
+            y0 *= scale_x
+            y1 *= scale_y
+            x0 *= scale_x
+            x1 *= scale_x
+
             draw.rectangle([(x0, y0), (x1, y1)], outline="red")
 
             for cell in table_element.cluster.cells:
                 x0, y0, x1, y1 = cell.bbox.as_tuple()
+                x0 *= scale_x
+                x1 *= scale_x
+                y0 *= scale_x
+                y1 *= scale_y
+
                 draw.rectangle([(x0, y0), (x1, y1)], outline="green")
 
             for tc in table_element.table_cells:
                 if tc.bbox is not None:
                     x0, y0, x1, y1 = tc.bbox.as_tuple()
+                    x0 *= scale_x
+                    x1 *= scale_x
+                    y0 *= scale_x
+                    y1 *= scale_y
+
                     if tc.column_header:
                         width = 3
                     else:

pyproject.toml

@@ -25,7 +25,7 @@ packages = [{include = "docling"}]
 # actual dependencies:
 ######################
 python = "^3.9"
-docling-core = { version = "^2.12.1", extras = ["chunking"] }
+docling-core = { version = "^2.13.1", extras = ["chunking"] }
 pydantic = "^2.0.0"
 docling-ibm-models = "^3.1.0"
 deepsearch-glm = "^1.0.0"