Hao Gan | Searcharxiv

arXiv2026

Grounding Across Views: Cross-View Referring Reasoning for Visual Grounding

Cross-view object geo-localization (CVOGL) aims to localize a target in a satellite image from an observation captured under another viewpoint. Existing methods typically specify the query with a click point or bounding box, marking the target region but underusing the semantic attributes and relations conveyed by natural language. Moreover, referring expressions are often viewpoint-dependent, making query-view descriptions difficult to ground directly in the satellite image. In this paper, we formulate cross-view visual grounding (CVVG), extending conventional point- or box-prompted CVOGL to instance grounding jointly guided by a referring expression and a visual exemplar. We present GAV (Grounding Across Views), a view-aware framework for selectively transferring visual and linguistic evidence across views. Its core is view-aware referring reasoning: target-centered descriptions are derived from the marked query image, checked for target-category consistency, and augmented with a direction-free role cue. Exemplar prompting, cross-view alignment, and scene-level discrimination ground this semantic evidence in a satellite instance. GAV achieves a new state of the art on MoP-UAV with 62.55% Acc@0.5. We also introduce CVOGL-Text, a benchmark for text-guided grounding from street- and drone-view queries to satellite images. GAV outperforms the click-point baseline by 7.09 and 6.79 Acc@0.25 points on the street- and drone-view splits, respectively, demonstrating robustness to larger viewpoint gaps. The code and annotations will be publicly released.

cs.CV↗

arXiv2024

Agricultural Object Detection with You Look Only Once (YOLO) Algorithm: A Bibliometric and Systematic Literature Review

Vision is a major component in several digital technologies and tools used in agriculture. The object detector, You Look Only Once (YOLO), has gained popularity in agriculture in a relatively short span due to its state-of-the-art performance. YOLO offers real-time detection with good accuracy and is implemented in various agricultural tasks, including monitoring, surveillance, sensing, automation, and robotics. The research and application of YOLO in agriculture are accelerating rapidly but are fragmented and multidisciplinary. Moreover, the performance characteristics (i.e., accuracy, speed, computation) of the object detector influence the rate of technology implementation and adoption in agriculture. Thus, the study aims to collect extensive literature to document and critically evaluate the advances and application of YOLO for agricultural object recognition. First, we conducted a bibliometric review of 257 articles to understand the scholarly landscape of YOLO in agricultural domain. Secondly, we conducted a systematic review of 30 articles to identify current knowledge, gaps, and modifications in YOLO for specific agricultural tasks. The study critically assesses and summarizes the information on YOLO's end-to-end learning approach, including data acquisition, processing, network modification, integration, and deployment. We also discussed task-specific YOLO algorithm modification and integration to meet the agricultural object or environment-specific challenges. In general, YOLO-integrated digital tools and technologies show the potential for real-time, automated monitoring, surveillance, and object handling to reduce labor, production cost, and environmental impact while maximizing resource efficiency. The study provides detailed documentation and significantly advances the existing knowledge on applying YOLO in agriculture, which can greatly benefit the scientific community.

cs.CV↗