refactor: pdfminer image cleanup (#3648)

This PR aims to remove `clean_pdfminer_duplicate_image_elements()`
function, as its functionality has already been integrated into the
`remove_duplicate_elements()` function in [PR
#3630](#3630).

Author: christinestraub

Diff for: CHANGELOG.md

@@ -1,4 +1,4 @@
-## 0.15.13-dev2
+## 0.15.13-dev3
 
 ### Enhancements
 

Diff for: test_unstructured/partition/pdf_image/test_pdfminer_processing.py

@@ -9,7 +9,6 @@
     aggregate_embedded_text_by_block,
     bboxes1_is_almost_subregion_of_bboxes2,
     boxes_self_iou,
-    clean_pdfminer_duplicate_image_elements,
     clean_pdfminer_inner_elements,
     remove_duplicate_elements,
 )
@@ -129,23 +128,6 @@ def test_clean_pdfminer_inner_elements(elements, length_extra_info, expected_doc
 ]
 
 
-@pytest.mark.parametrize(
-    ("elements", "expected_document_length"),
-    [
-        (elements_with_duplicate_images, 2),
-        (elements_without_duplicate_images, 4),
-    ],
-)
-def test_clean_pdfminer_duplicate_image_elements(elements, expected_document_length):
-    page = PageLayout(number=1, image=Image.new("1", (1, 1)))
-    page.elements = elements
-    document = DocumentLayout(pages=[page])
-
-    cleaned_doc = clean_pdfminer_duplicate_image_elements(document)
-
-    assert len(cleaned_doc.pages[0].elements) == expected_document_length
-
-
 def test_aggregate_by_block():
     expected = "Inside region1 Inside region2"
     embedded_regions = [

Diff for: unstructured/__version__.py

@@ -1 +1 @@
-__version__ = "0.15.13-dev2"  # pragma: no cover
+__version__ = "0.15.13-dev3"  # pragma: no cover

Diff for: unstructured/partition/pdf.py

@@ -68,7 +68,6 @@
     save_elements,
 )
 from unstructured.partition.pdf_image.pdfminer_processing import (
-    clean_pdfminer_duplicate_image_elements,
     clean_pdfminer_inner_elements,
     merge_inferred_with_extracted_layout,
 )
@@ -712,7 +711,6 @@ def _partition_pdf_or_image_local(
     if hi_res_model_name.startswith("chipper") and hi_res_model_name != "chipperv1":
         kwargs["sort_mode"] = SORT_MODE_DONT
 
-    final_document_layout = clean_pdfminer_duplicate_image_elements(final_document_layout)
     final_document_layout = clean_pdfminer_inner_elements(final_document_layout)
 
     for page in final_document_layout.pages:

Diff for: unstructured/partition/pdf_image/pdfminer_processing.py

@@ -3,7 +3,6 @@
 import numpy as np
 from pdfminer.utils import open_filename
 
-from unstructured.documents.elements import ElementType
 from unstructured.partition.pdf_image.pdf_image_utils import remove_control_characters
 from unstructured.partition.pdf_image.pdfminer_utils import (
     extract_image_objects,
@@ -268,43 +267,6 @@ def clean_pdfminer_inner_elements(document: "DocumentLayout") -> "DocumentLayout
     return document
 
 
-def clean_pdfminer_duplicate_image_elements(document: "DocumentLayout") -> "DocumentLayout":
-    """Removes duplicate image elements extracted by PDFMiner from a document layout."""
-
-    for page in document.pages:
-        image_bboxes = []
-        texts = []
-        bbox_to_iou_mapping = {}
-        current_idx = 0
-        for i, element in enumerate(page.elements):
-            if element.source != Source.PDFMINER or element.type != ElementType.IMAGE:
-                continue
-            image_bboxes.append(element.bbox)
-            texts.append(element.text)
-            bbox_to_iou_mapping[i] = current_idx
-            current_idx += 1
-
-        iou = boxes_self_iou(image_bboxes, env_config.EMBEDDED_IMAGE_SAME_REGION_THRESHOLD)
-
-        filtered_elements = []
-        for i, element in enumerate(page.elements[:-1]):
-            if element.source != Source.PDFMINER or element.type != ElementType.IMAGE:
-                filtered_elements.append(element)
-                continue
-            text = element.text
-            this_idx = bbox_to_iou_mapping[i]
-            if any(
-                text == texts[potential_match + this_idx + 1]
-                for potential_match in np.where(iou[this_idx, this_idx + 1 :])[0]
-            ):
-                continue
-            else:
-                filtered_elements.append(element)
-        page.elements[:-1] = filtered_elements
-
-    return document
-
-
 @requires_dependencies("unstructured_inference")
 def remove_duplicate_elements(
     elements: list["TextRegion"],