[mvieth]

Follow-up of #6332

[Copilot]

Pull Request Overview

This PR continues the migration from deprecated PCL search interfaces by replacing more instances of KdTreeFLANN and pcl::search::KdTree with the newer pcl::search::autoSelectMethod API. This follows up on PR #6332 to modernize search method selection across the PCL codebase.

• Replaces manual search tree instantiation with automatic method selection
• Updates include statements to use pcl/search/auto.h instead of specific tree headers
• Modifies logic to leverage the Purpose enum for optimized search method selection

Reviewed Changes

Copilot reviewed 17 out of 17 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
visualization/src/common/io.cpp	Replaces KdTreeFLANN with autoSelectMethod for nearest neighbor search
tracking/include/pcl/tracking/impl/nearest_pair_point_cloud_coherence.hpp	Updates search initialization logic and includes
test/keypoints/test_iss_3d.cpp	Adds missing kdtree include for tests
surface/include/pcl/surface/impl/surfel_smoothing.hpp	Replaces organized/kdtree conditional with autoSelectMethod
surface/include/pcl/surface/impl/mls.hpp	Updates MLS search initialization and control flow
segmentation/include/pcl/segmentation/impl/segment_differences.hpp	Simplifies search tree initialization
segmentation/include/pcl/segmentation/impl/seeded_hue_segmentation.hpp	Updates search method selection
segmentation/include/pcl/segmentation/impl/grabcut_segmentation.hpp	Simplifies GrabCut search initialization
segmentation/include/pcl/segmentation/impl/extract_labeled_clusters.hpp	Updates cluster extraction search logic
registration/include/pcl/registration/ppf_registration.h	Updates member variable type declaration
registration/include/pcl/registration/impl/ppf_registration.hpp	Updates PPF registration search initialization
recognition/include/pcl/recognition/ransac_based/trimmed_icp.h	Converts TrimmedICP to use new search interface
keypoints/include/pcl/keypoints/impl/sift_keypoint.hpp	Adds missing kdtree include
keypoints/include/pcl/keypoints/impl/keypoint.hpp	Updates base keypoint search initialization
keypoints/include/pcl/keypoints/impl/harris_6d.hpp	Converts Harris6D corner refinement to new search API
features/include/pcl/features/impl/statistical_multiscale_interest_region_extraction.hpp	Updates feature extraction search method
apps/3d_rec_framework/include/pcl/apps/3d_rec_framework/feature_wrapper/local/local_estimator.h	Simplifies uniform sampling search initialization

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