From f4f74c7c9415dc96333cf6fd712868edf7fcff33 Mon Sep 17 00:00:00 2001
From: Martin Thoma <info@martin-thoma.de>
Date: Sat, 9 Jul 2022 10:43:52 +0200
Subject: [PATCH] BUG: Column default for CCITTFaxDecode (#1079)

---
 PyPDF2/filters.py | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/PyPDF2/filters.py b/PyPDF2/filters.py
index 077143813..a7fbb415a 100644
--- a/PyPDF2/filters.py
+++ b/PyPDF2/filters.py
@@ -409,8 +409,9 @@ class CCITTFaxDecode:
     def _get_parameters(
         parameters: Union[None, ArrayObject, DictionaryObject], rows: int
     ) -> CCITParameters:
+        # TABLE 3.9 Optional parameters for the CCITTFaxDecode filter
         k = 0
-        columns = 0
+        columns = 1728
         if parameters:
             if isinstance(parameters, ArrayObject):
                 for decode_parm in parameters:
@@ -419,8 +420,10 @@ def _get_parameters(
                     if CCITT.K in decode_parm:
                         k = decode_parm[CCITT.K]
             else:
-                columns = parameters[CCITT.COLUMNS]  # type: ignore
-                k = parameters[CCITT.K]  # type: ignore
+                if CCITT.COLUMNS in parameters:
+                    columns = parameters[CCITT.COLUMNS]  # type: ignore
+                if CCITT.K in parameters:
+                    k = parameters[CCITT.K]  # type: ignore
 
         return CCITParameters(k, columns, rows)