From 0d57c6b89e13e3aae8c4b8006794b5e2907456e1 Mon Sep 17 00:00:00 2001
From: shimat <schimatk@gmail.com>
Date: Fri, 19 Jun 2026 13:49:06 +0900
Subject: [PATCH] Add missing SolvePnPMethod enum values (AP3P, IPPE,
 IPPE_SQUARE, SQPNP)

Add the 4 values defined in OpenCV calib3d.hpp that were missing from the
SolvePnPMethod enum: AP3P=5, IPPE=6, IPPE_SQUARE=7, SQPNP=8.

Fixes #1895

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
---
 .../Modules/calib3d/Enum/SolvePnPFlags.cs     | 21 +++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/src/OpenCvSharp/Modules/calib3d/Enum/SolvePnPFlags.cs b/src/OpenCvSharp/Modules/calib3d/Enum/SolvePnPFlags.cs
index 8324414bfe..92fac9f6c3 100644
--- a/src/OpenCvSharp/Modules/calib3d/Enum/SolvePnPFlags.cs
+++ b/src/OpenCvSharp/Modules/calib3d/Enum/SolvePnPFlags.cs
@@ -33,6 +33,27 @@ public enum SolvePnPMethod
     /// A.Penate-Sanchez, J.Andrade-Cetto, F.Moreno-Noguer. "Exhaustive Linearization for Robust Camera Pose and Focal Length Estimation"
     /// </summary>
     UPNP = 4,
+
+    /// <summary>
+    /// T. Ke, S. Roumeliotis. "An Efficient Algebraic Solution to the Perspective-Three-Point Problem"
+    /// </summary>
+    AP3P = 5,
+
+    /// <summary>
+    /// Infinitesimal Plane-Based Pose Estimation. Object points must be coplanar.
+    /// </summary>
+    IPPE = 6,
+
+    /// <summary>
+    /// Infinitesimal Plane-Based Pose Estimation.
+    /// This is a special case suitable for marker pose estimation. 4 coplanar object points must be defined.
+    /// </summary>
+    IPPE_SQUARE = 7,
+
+    /// <summary>
+    /// G. Terzakis, M. Lourakis. "A Consistently Fast and Globally Optimal Solution to the Perspective-n-Point Problem"
+    /// </summary>
+    SQPNP = 8,
 }
 
 /// <summary>