BUG: Fix detection of inline images followed by names or numbers

Closes py-pdf#3172.

Author: stefan6419846

pypdf/generic/_image_inline.py

@@ -285,7 +285,15 @@ def is_followed_by_binary_data(stream: IO[bytes], length: int = 10) -> bool:
     if operator_end is None:
         # We probably are inside an operation.
         operator_end = length
-    if operator_end - operator_start > 3:  # noqa: SIM103
+    operator_length = operator_end - operator_start
+    operator = data[operator_start:operator_end]
+    if operator.startswith(b"/") and operator_length > 1:
+        # Name object.
+        return False
+    if operator.replace(b".", b"").isdigit():
+        # Graphics operator, for example a move. A number (integer or float).
+        return False
+    if operator_length > 3:  # noqa: SIM103
         # Usually, the operators inside a content stream should not have more than three characters,
         # especially after an inline image.
         return True

tests/generic/test_image_inline.py

@@ -48,3 +48,14 @@ def test_is_followed_by_binary_data():
     # No `operator_start`.
     stream = BytesIO(b"ABCDEFG")
     assert is_followed_by_binary_data(stream)
+
+    # Name object.
+    stream = BytesIO(b"/R10 gs\n/R12 cs\n")
+    assert not is_followed_by_binary_data(stream)
+
+    # Numbers.
+    stream = BytesIO(b"1337 42 m\n")
+    assert not is_followed_by_binary_data(stream)
+
+    stream = BytesIO(b"1234.56 42 13 37 10 20 c\n")
+    assert not is_followed_by_binary_data(stream)