Computer vision | Ecosyste.ms: Awesome

https://github.com/chandrikadeb7/face-mask-detection

Face Mask Detection system based on computer vision and deep learning using OpenCV and Tensorflow/Keras

bing-search caffe computer-vision covid-19 deep-learning face-mask face-mask-detection facemask-detection facemaskdetect hacktoberfest keras keras-tensorflow machine-learning mask-detection mask-detection-system mobilenetv2 python python-3 python3 ssd-mobilenet

Last synced: 09 Jan 2026

https://github.com/Kobaayyy/Awesome-CVPR2026-CVPR2025-CVPR2024-CVPR2021-CVPR2020-Low-Level-Vision

A Collection of Papers and Codes for CVPR2026/CVPR2025/CVPR2024/CVPR2021/CVPR2020 Low Level Vision

c-v-p-r computer-vision cvpr2020 cvpr2021 cvpr2024 cvpr2025 cvpr2026 frame-interpolation image-compression image-deblurring image-dehazing image-demoireing image-denoising image-deraining image-enhancement image-processing image-quality-assessment image-restoration low-level-vision super-resolution

Last synced: 28 Feb 2026

https://github.com/snavely/bundler_sfm

Bundler Structure from Motion Toolkit

3d-reconstruction 3d-vision bundle-adjustment computer-vision computer-vision-tools structure-from-motion

Last synced: 15 May 2025

https://github.com/lufficc/ssd

High quality, fast, modular reference implementation of SSD in PyTorch

computer-vision deep-learning object-detection pytorch ssd

Last synced: 15 May 2025

https://github.com/lufficc/SSD

High quality, fast, modular reference implementation of SSD in PyTorch

computer-vision deep-learning object-detection pytorch ssd

Last synced: 20 Mar 2025

https://github.com/MaaXYZ/MaaFramework

基于图像识别的自动化黑盒测试框架 | An automation black-box testing framework based on image recognition

black-box-testing computer-vision

Last synced: 08 Nov 2025

https://github.com/yatenglg/isat_with_segment_anything

Labeling tool with SAM(segment anything model),supports SAM, SAM2, sam-hq, MobileSAM EdgeSAM etc.交互式半自动图像标注工具

annotation-tool computer-vision labeling labeling-tool sam sam2 segment-anything segment-anything-2 video-segmentation

Last synced: 24 Dec 2025

https://github.com/lucidrains/lambda-networks

Implementation of LambdaNetworks, a new approach to image recognition that reaches SOTA with less compute

artificial-intelligence attention attention-mechanism computer-vision deep-learning

Last synced: 15 May 2025

https://github.com/alibabaresearch/advancedliteratemachinery

A collection of original, innovative ideas and algorithms towards Advanced Literate Machinery. This project is maintained by the OCR Team in the Language Technology Lab, Tongyi Lab, Alibaba Group.

artificial-intelligence computer-vision document document-analysis document-intelligence document-recognition document-understanding documentai end-to-end-ocr multimodal multimodal-deep-learning ocr scene-text-detection scene-text-detection-recognition scene-text-recognition text-detection text-recognition vision-language vision-language-model vision-language-transformer

Last synced: 28 Mar 2025

https://github.com/AlibabaResearch/AdvancedLiterateMachinery

A collection of original, innovative ideas and algorithms towards Advanced Literate Machinery. This project is maintained by the OCR Team in the Language Technology Lab, Tongyi Lab, Alibaba Group.

artificial-intelligence computer-vision document document-analysis document-intelligence document-recognition document-understanding documentai end-to-end-ocr multimodal multimodal-deep-learning ocr scene-text-detection scene-text-detection-recognition scene-text-recognition text-detection text-recognition vision-language vision-language-model vision-language-transformer

Last synced: 10 Apr 2025

https://github.com/symforce-org/symforce

Fast symbolic computation, code generation, and nonlinear optimization for robotics

autonomous-vehicles code-generation computer-vision cpp motion-planning optimization python robotics slam structure-from-motion symbolic-computation

Last synced: 06 Sep 2025

https://github.com/spla-tam/SplaTAM

SplaTAM: Splat, Track & Map 3D Gaussians for Dense RGB-D SLAM (CVPR 2024)

computer-vision cvpr2024 gaussian-splatting robotics slam

Last synced: 20 Mar 2025

https://github.com/invictus717/MetaTransformer

Meta-Transformer for Unified Multimodal Learning

artificial-intelligence computer-vision foundationmodel machine-learning multimedia multimodal transformers

Last synced: 10 Apr 2025

https://github.com/QIN2DIM/hcaptcha-challenger

🥂 Gracefully face hCaptcha challenge with MoE(ONNX) embedded solution.

clip computer-vision hcaptcha hcaptcha-solver image-segmentation multi-modal multi-modal-learning object-detection onnx onnx-models onnxruntime opencv-python playwright solver yolo yolov5 zero-shot-classification

Last synced: 28 Mar 2025

https://github.com/robertknight/ocrs

Rust library and CLI tool for OCR (extracting text from images)

computer-vision machine-learning ocr

Last synced: 13 May 2025

https://github.com/kritiksoman/gimp-ml

AI for GNU Image Manipulation Program

coloring-image computer-vision computervision deblurring deep-learning dehazing enlightenment gimp gimp-plugin gimp-plugins image-manipulation linux machine-learning machine-learning-algorithms macos photo-editing python3 ubuntu

Last synced: 15 May 2025

https://github.com/pixeltable/pixeltable

Pixeltable — Data Infrastructure providing a declarative, incremental approach for multimodal AI workloads.

ai artificial-intelligence chatbot computer-vision data-science database feature-engineering feature-store genai llm machine-learning ml mlops multimodal vector-database

Last synced: 01 May 2026

https://github.com/mathworks/matlab-simulink-challenge-project-hub

This MATLAB and Simulink Challenge Project Hub contains a list of research and design project ideas. These projects will help you gain practical experience and insight into technology trends and industry directions.

ai autonomous capstone capstone-project computer-vision deep-learning drones energy final-project final-year-project master-thesis matlab project-ideas robotics senior-design senior-project simulink student-project students thesis

Last synced: 11 Apr 2025

https://github.com/google-deepmind/tapnet

Tracking Any Point (TAP)

benchmark computer-vision deep-learning point-tracking robotics

Last synced: 14 May 2025

https://github.com/chainer/chainercv

ChainerCV: a Library for Deep Learning in Computer Vision

chainer chainercv computer-vision cupy deep-learning neural-network python

Last synced: 28 Sep 2025

https://github.com/kritiksoman/GIMP-ML

AI for GNU Image Manipulation Program

coloring-image computer-vision computervision deblurring deep-learning dehazing enlightenment gimp gimp-plugin gimp-plugins image-manipulation linux machine-learning machine-learning-algorithms macos photo-editing python3 ubuntu

Last synced: 05 Apr 2025

https://github.com/hkchengrex/mmaudio

[CVPR 2025] MMAudio: Taming Multimodal Joint Training for High-Quality Video-to-Audio Synthesis

audio audio-synthesis computer-vision deep-learning text-to-audio video-to-audio

Last synced: 08 May 2025

https://github.com/microsoft/semi-supervised-learning

A Unified Semi-Supervised Learning Codebase (NeurIPS'22)

audio-classification classification computer-vision deep-learning low-resource machine-learning natural-language-processing pytorch semi-supervised-learning semisupervised-learning transformer

Last synced: 14 May 2025

https://github.com/toandaominh1997/efficientdet.pytorch

Implementation EfficientDet: Scalable and Efficient Object Detection in PyTorch

coco computer-vision demo detection efficientdet-d0 efficientnet focalloss multibox nms object-detection pascal-voc pytorch

Last synced: 14 Aug 2025

https://github.com/toandaominh1997/EfficientDet.Pytorch

Implementation EfficientDet: Scalable and Efficient Object Detection in PyTorch

coco computer-vision demo detection efficientdet-d0 efficientnet focalloss multibox nms object-detection pascal-voc pytorch

Last synced: 19 Jul 2025

https://github.com/una-dinosauria/3d-pose-baseline

A simple baseline for 3d human pose estimation in tensorflow. Presented at ICCV 17.

3d-vision baseline computer-vision iccv-17 iccv-2017 tensorflow

Last synced: 16 May 2025

https://github.com/abreheret/pixelannotationtool

Annotate quickly images.

annotation annotation-tool computer-vision deep-learning ground-truth image-labeling image-seg-tool labeling-tool opencv pixel pixel-wise qt5 tool

Last synced: 15 May 2025

https://github.com/microsoft/Semi-supervised-learning

A Unified Semi-Supervised Learning Codebase (NeurIPS'22)

audio-classification classification computer-vision deep-learning low-resource machine-learning natural-language-processing pytorch semi-supervised-learning semisupervised-learning transformer

Last synced: 26 Mar 2025

https://github.com/minivision-ai/silent-face-anti-spoofing

静默活体检测（Silent-Face-Anti-Spoofing）

android-app computer-vision deep-learning face-anti-spoofing sdk

Last synced: 08 Apr 2025

https://github.com/rese1f/stablevideo

[ICCV 2023] StableVideo: Text-driven Consistency-aware Diffusion Video Editing

aigc computer-vision controlnet diffusion-model video-editing

Last synced: 16 May 2025

https://github.com/abreheret/PixelAnnotationTool

Annotate quickly images.

annotation annotation-tool computer-vision deep-learning ground-truth image-labeling image-seg-tool labeling-tool opencv pixel pixel-wise qt5 tool

Last synced: 05 Apr 2025

https://github.com/RQLuo/MixTeX-Latex-OCR

MixTeX multimodal LaTeX, ZhEn, and, Table OCR. It performs efficient CPU-based inference in a local offline on Windows.

computer-vision deep-learning latex machine-learning ocr onnx python

Last synced: 30 Aug 2025

https://github.com/CSAILVision/LabelMeAnnotationTool

Source code for the LabelMe annotation tool.

annotation computer-vision

Last synced: 27 Apr 2025

https://github.com/csailvision/labelmeannotationtool

Source code for the LabelMe annotation tool.

annotation computer-vision

Last synced: 15 May 2025

https://github.com/ai-forever/ghost

A new one shot face swap approach for image and video domains

computer-vision deep-face-swap deep-learning deepfake face-swap faceswap ghost ghost-faceswap ghost-swap pytorch

Last synced: 14 May 2025

https://github.com/torchgan/torchgan

Research Framework for easy and efficient training of GANs based on Pytorch

computer-vision deep-learning gans generative-adversarial-networks generative-model machine-learning neural-networks python python3 pytorch

Last synced: 15 May 2025

https://github.com/fendouai/opencvtutorials

OpenCV-Python4.1 中文文档

computer-vision deep-learning machine-learning object-detection opencv opencv-python python

Last synced: 07 Oct 2025

https://github.com/BachiLi/redner

Differentiable rendering without approximation.

computer-graphics computer-vision differentiable-rendering monte-carlo-ray-tracing pytorch rendering tensorflow

Last synced: 26 Mar 2025

https://github.com/qingyonghu/randla-net

🔥RandLA-Net in Tensorflow (CVPR 2020, Oral & IEEE TPAMI 2021)

3d-vision computer-vision s3dis semantic-segmentation semantic3d semantickitti

Last synced: 16 May 2025

https://github.com/tannerhelland/PhotoDemon

A free portable photo editor focused on pro-grade features, high performance, and maximum usability.

computer-vision image-editor image-filters image-processing paint photo-editor vb6 win32

Last synced: 03 Apr 2025

https://github.com/skalskip/ilearndeeplearning.py

This repository contains small projects related to Neural Networks and Deep Learning in general. Subjects are closely linekd with articles I publish on Medium. I encourage you both to read as well as to check how the code works in the action.

computer-vision deep-learning deep-learning-tutorial neural-network numpy visualizations

Last synced: 08 Apr 2025

https://github.com/SkalskiP/ILearnDeepLearning.py

This repository contains small projects related to Neural Networks and Deep Learning in general. Subjects are closely linekd with articles I publish on Medium. I encourage you both to read as well as to check how the code works in the action.

computer-vision deep-learning deep-learning-tutorial neural-network numpy visualizations

Last synced: 01 May 2025

https://github.com/QingyongHu/RandLA-Net

🔥RandLA-Net in Tensorflow (CVPR 2020, Oral & IEEE TPAMI 2021)

3d-vision computer-vision s3dis semantic-segmentation semantic3d semantickitti

Last synced: 20 Mar 2025

https://github.com/allenai/ai2thor

An open-source platform for Visual AI.

artificial-intelligence computer-vision interaction physics-engine visual-ai

Last synced: 13 May 2025

https://github.com/nianticlabs/simplerecon

[ECCV 2022] SimpleRecon: 3D Reconstruction Without 3D Convolutions

computer-vision cost-volume depth depth-estimation eccv2022 multi-view-stereo mvs pytorch scannet visualization

Last synced: 16 May 2025

https://github.com/OPHoperHPO/image-background-remove-tool

✂️ Automated high-quality background removal framework for an image using neural networks. ✂️

background-removal background-removal-js basnet computer-vision deeplabv3 docker fastapi machine-learning matting python pytorch remove-background salient-object-detection segmentation torch transfer-learning trimap u2net

Last synced: 14 Mar 2025

https://github.com/ophoperhpo/image-background-remove-tool

✂️ Automated high-quality background removal framework for an image using neural networks. ✂️

background-removal background-removal-js basnet computer-vision deeplabv3 docker fastapi machine-learning matting python pytorch remove-background salient-object-detection segmentation torch transfer-learning trimap u2net

Last synced: 02 Oct 2025

https://github.com/torchssl/torchssl

A PyTorch-based library for semi-supervised learning (NeurIPS'21)

codebase computer-vision deep-learning machine-learning pytorch self-supervised-learning semi-supervised-learning toolkit

Last synced: 05 Oct 2025

https://github.com/dwctod/cvpr2024-papers-with-code-demo

收集 CVPR 最新的成果，包括论文、代码和demo视频等，欢迎大家推荐！Collect the latest CVPR (Conference on Computer Vision and Pattern Recognition) results, including papers, code, and demo videos, etc., and welcome recommendations from everyone!

computer-vision cvpr cvpr2021 cvpr2022 cvpr2023 cvpr2024 llm multimodal-deep-learning object-detection segment-anything segmentation

Last synced: 26 Jan 2026

https://github.com/DWCTOD/CVPR2024-Papers-with-Code-Demo

收集 CVPR 最新的成果，包括论文、代码和demo视频等，欢迎大家推荐！Collect the latest CVPR (Conference on Computer Vision and Pattern Recognition) results, including papers, code, and demo videos, etc., and welcome recommendations from everyone!

computer-vision cvpr cvpr2021 cvpr2022 cvpr2023 cvpr2024 llm multimodal-deep-learning object-detection segment-anything segmentation

Last synced: 29 Mar 2025

https://github.com/cdpierse/transformers-interpret

Model explainability that works seamlessly with 🤗 transformers. Explain your transformers model in just 2 lines of code.

captum computer-vision deep-learning explainable-ai interpretability machine-learning model-explainability natural-language-processing neural-network nlp transformers transformers-model

Last synced: 15 May 2025

https://github.com/dirtyharrylyl/transformer-in-vision

Recent Transformer-based CV and related works.

computer-vision deep-learning multi-modal paper self-attention transformer vision-transformers visual-language

Last synced: 28 Jan 2026

https://github.com/ahmetozlu/tensorflow_object_counting_api

🚀 The TensorFlow Object Counting API is an open source framework built on top of TensorFlow and Keras that makes it easy to develop object counting systems!

computer-vision data-science deep-learning deep-neural-networks image-processing machine-learning object-counting object-counting-api object-detection object-detection-api object-detection-label object-detection-pipelines opencv pedestrian-counting shelf-management shelf-navigation tensorflow tensorflow-api tensorflow-object-detection-api vehicle-counting

Last synced: 15 May 2025

https://github.com/muskie82/MonoGS

[CVPR'24 Highlight & Best Demo Award] Gaussian Splatting SLAM

computer-vision cvpr2024 gaussian-splatting robotics slam

Last synced: 20 Mar 2025

https://github.com/DirtyHarryLYL/Transformer-in-Vision

Recent Transformer-based CV and related works.

computer-vision deep-learning multi-modal paper self-attention transformer vision-transformers visual-language

Last synced: 20 Mar 2025

https://github.com/om-ai-lab/omdet

Real-time and accurate open-vocabulary end-to-end object detection

coco computer-vision lvis object-detection open-vocabulary real-time vision-and-language zero-shot zero-shot-object-detection

Last synced: 13 Apr 2025

https://github.com/kaiyangzhou/dassl.pytorch

A PyTorch toolbox for domain generalization, domain adaptation and semi-supervised learning.

artificial-intelligence benchmark-datasets computer-vision deep-learning deep-neural-networks domain-adaptation domain-generalization machine-learning pytorch semi-supervised-learning

Last synced: 16 May 2025

https://github.com/TorchSSL/TorchSSL

A PyTorch-based library for semi-supervised learning (NeurIPS'21)

codebase computer-vision deep-learning machine-learning pytorch self-supervised-learning semi-supervised-learning toolkit

Last synced: 01 May 2025

https://github.com/digantamisra98/mish

Official Repository for "Mish: A Self Regularized Non-Monotonic Neural Activation Function" [BMVC 2020]

activation-functions bmvc bmvc20 computer-vision deep-learning image-classification mathematics neural-networks object-detection

Last synced: 17 Oct 2025

https://github.com/piddnad/DDColor

[ICCV 2023] DDColor: Towards Photo-Realistic Image Colorization via Dual Decoders

computer-vision image-colorization pytorch

Last synced: 24 Aug 2025

https://github.com/aitorzip/pytorch-cyclegan

A clean and readable Pytorch implementation of CycleGAN

artificial-intelligence computer-graphics computer-vision cyclegan deep-learning generative-adversarial-network image-generation image-processing pytorch

Last synced: 16 May 2025

https://github.com/piddnad/ddcolor

[ICCV 2023] DDColor: Towards Photo-Realistic Image Colorization via Dual Decoders

computer-vision image-colorization pytorch

Last synced: 14 May 2025

https://github.com/mathworks/MATLAB-Simulink-Challenge-Project-Hub

This MATLAB and Simulink Challenge Project Hub contains a list of research and design project ideas. These projects will help you gain practical experience and insight into technology trends and industry directions.

ai autonomous capstone capstone-project computer-vision deep-learning drones energy final-project final-year-project master-thesis matlab project-ideas robotics senior-design senior-project simulink student-project students thesis

Last synced: 09 May 2025

https://github.com/digantamisra98/Mish

Official Repository for "Mish: A Self Regularized Non-Monotonic Neural Activation Function" [BMVC 2020]

activation-functions bmvc bmvc20 computer-vision deep-learning image-classification mathematics neural-networks object-detection

Last synced: 20 Mar 2025

https://github.com/swz30/mprnet

[CVPR 2021] Multi-Stage Progressive Image Restoration. SOTA results for Image deblurring, deraining, and denoising.

computer-vision cvpr-2021 cvpr2021 cvpr21 image-deblurring image-denoising image-deraining image-restoration low-level-vision multistage-network progressive-restoration pytorch

Last synced: 16 May 2025

https://github.com/aitorzip/PyTorch-CycleGAN

A clean and readable Pytorch implementation of CycleGAN

artificial-intelligence computer-graphics computer-vision cyclegan deep-learning generative-adversarial-network image-generation image-processing pytorch

Last synced: 07 Apr 2025

https://github.com/poloclub/diffusiondb

A large-scale text-to-image prompt gallery dataset based on Stable Diffusion

ai-art computer-vision image-generation prompt-engineering stable-diffusion

Last synced: 16 May 2025

https://github.com/yatengLG/ISAT_with_segment_anything

Labeling tool with SAM(segment anything model),supports SAM, SAM2, sam-hq, MobileSAM EdgeSAM etc.交互式半自动图像标注工具

annotation-tool computer-vision labeling labeling-tool sam sam2 segment-anything segment-anything-2 video-segmentation

Last synced: 09 Mar 2025

https://github.com/gnes-ai/gnes

GNES is Generic Neural Elastic Search, a cloud-native semantic search system based on deep neural network.

cloud-native computer-vision database deep-learning distributed-systems dnn docker-swarm elasticsearch gnes grpc machine-learning microservices neural-network nlp python pytorch search-engine semantic-search tensorflow video-processing

Last synced: 05 Oct 2025

https://poloclub.github.io/diffusiondb/

A large-scale text-to-image prompt gallery dataset based on Stable Diffusion

ai-art computer-vision image-generation prompt-engineering stable-diffusion

Last synced: 07 May 2025

https://github.com/open-mmlab/mmengine

OpenMMLab Foundational Library for Training Deep Learning Models

ai computer-vision deep-learning machine-learning python pytorch

Last synced: 13 May 2025

https://github.com/tensorlayer/hyperpose

Library for Fast and Flexible Human Pose Estimation

computer-vision distributed-training mobilenet neural-networks openpose pose-estimation tensorflow tensorlayer tensorrt

Last synced: 12 Jan 2026

https://github.com/tensorlayer/HyperPose

Library for Fast and Flexible Human Pose Estimation

computer-vision distributed-training mobilenet neural-networks openpose pose-estimation tensorflow tensorlayer tensorrt

Last synced: 13 Apr 2025

https://github.com/atulapra/emotion-detection

Real-time Facial Emotion Detection using deep learning

computer-vision deep-learning emotion-detection emotion-recognition haar-cascade opencv opencv-python tflearn

Last synced: 15 May 2025

https://github.com/Yangzhangcst/Transformer-in-Computer-Vision

A paper list of some recent Transformer-based CV works.

awesome computer-vision deep-learning detr papers transformer transformer-awesome transformer-cv vit

Last synced: 06 May 2025

https://github.com/amaiya/ktrain

ktrain is a Python library that makes deep learning and AI more accessible and easier to apply

computer-vision deep-learning graph-neural-networks keras machine-learning nlp python tabular-data tensorflow

Last synced: 29 Apr 2025

https://github.com/lingdong-/qiji-font

齊伋體 - typeface from Ming Dynasty woodblock printed books

chinese classical-chinese computer-vision font typeface typography woodcutting

Last synced: 12 Apr 2025

https://github.com/swz30/MPRNet

[CVPR 2021] Multi-Stage Progressive Image Restoration. SOTA results for Image deblurring, deraining, and denoising.

computer-vision cvpr-2021 cvpr2021 cvpr21 image-deblurring image-denoising image-deraining image-restoration low-level-vision multistage-network progressive-restoration pytorch

Last synced: 07 Apr 2025

https://github.com/LingDong-/qiji-font

齊伋體 - typeface from Ming Dynasty woodblock printed books

chinese classical-chinese computer-vision font typeface typography woodcutting

Last synced: 07 May 2025

https://github.com/open-compass/VLMEvalKit

Open-source evaluation toolkit of large vision-language models (LVLMs), support ~100 VLMs, 40+ benchmarks

chatgpt claude clip computer-vision evaluation gemini gpt gpt-4v gpt4 large-language-models llava llm multi-modal openai openai-api pytorch qwen vit vqa

Last synced: 20 Jul 2025

https://github.com/imagej/imagej2

Open scientific N-dimensional image processing :microscope: :sparkler:

computer-vision image-processing

Last synced: 14 May 2025

https://github.com/captain1986/captainblackboard

船长关于机器学习、计算机视觉和工程技术的总结和分享

computer-vision convolutional-neural-networks deep-learning optimization-algorithms summary

Last synced: 16 May 2025

https://github.com/pprp/simplecvreproduction

Replication of simple CV Projects including attention, classification, detection, keypoint detection, etc.

attention classification computer-vision cv demo face-detection landmark object-detection paper-reproduction pytorch

Last synced: 16 May 2025

https://github.com/br-idl/paddlevit

:robot: PaddleViT: State-of-the-art Visual Transformer and MLP Models for PaddlePaddle 2.0+

classification computer-vision cv deep-learning detection encoder-decoder gan mlp object-detection paddlepaddle segmentation semantic-segmentation transformer vit

Last synced: 14 Apr 2025

https://github.com/huoyijie/AdvancedEAST

AdvancedEAST is an algorithm used for Scene image text detect, which is primarily based on EAST, and the significant improvement was also made, which make long text predictions more accurate.https://github.com/huoyijie/raspberrypi-car

advancedeast advancedeast-network-arch algorithm bellow computer-vision deep-learning east icpr keras machine-learning python scene tensorflow text-detect text-predictions tian-chi tianchi

Last synced: 02 Apr 2025

https://github.com/huoyijie/advancedeast

AdvancedEAST is an algorithm used for Scene image text detect, which is primarily based on EAST, and the significant improvement was also made, which make long text predictions more accurate.https://github.com/huoyijie/raspberrypi-car

advancedeast advancedeast-network-arch algorithm bellow computer-vision deep-learning east icpr keras machine-learning python scene tensorflow text-detect text-predictions tian-chi tianchi