From 9188157715f755dfd72cee0bde118fde2210eb53 Mon Sep 17 00:00:00 2001
From: pubpub-zz <4083478+pubpub-zz@users.noreply.github.com>
Date: Mon, 28 Aug 2023 22:33:29 +0200
Subject: [PATCH] BUG: fix image look-up table in EncodedStreamObject

closes #2124
closes #2110
---
 pypdf/filters.py      | 3 ++-
 tests/test_filters.py | 9 +++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/pypdf/filters.py b/pypdf/filters.py
index 303838114..1bc2655a1 100644
--- a/pypdf/filters.py
+++ b/pypdf/filters.py
@@ -58,6 +58,7 @@
     ArrayObject,
     DecodedStreamObject,
     DictionaryObject,
+    EncodedStreamObject,
     IndirectObject,
     NullObject,
 )
@@ -860,7 +861,7 @@ def bits2byte(data: bytes, size: Tuple[int, int], bits: int) -> bytes:
         if color_space == "/Indexed":
             from .generic import TextStringObject
 
-            if isinstance(lookup, DecodedStreamObject):
+            if isinstance(lookup, (EncodedStreamObject, DecodedStreamObject)):
                 lookup = lookup.get_data()
             if isinstance(lookup, TextStringObject):
                 lookup = lookup.original_bytes
diff --git a/tests/test_filters.py b/tests/test_filters.py
index 6e145f549..165a81f30 100644
--- a/tests/test_filters.py
+++ b/tests/test_filters.py
@@ -585,3 +585,12 @@ def test_jpx_no_spacecode():
     with pytest.raises(PdfReadError) as exc:
         reader.pages[0].images[0]
     assert exc.value.args[0].startswith("ColorSpace field not found")
+
+
+@pytest.mark.enable_socket()
+def test_encodedstream_lookup():
+    """From #2124"""
+    url = "https://github.com/py-pdf/pypdf/files/12455580/10.pdf"
+    name = "iss2124.pdf"
+    reader = PdfReader(BytesIO(get_data_from_url(url, name=name)))
+    reader.pages[12].images[0]