Computer vision

Computer vision is an interdisciplinary field that deals with how computers can be made to gain high-level understanding of digital images and videos.

GitHub: https://github.com/topics/computer-vision
Wikipedia: https://en.wikipedia.org/wiki/Computer_vision
Related Topics: vision, deep-learning, machine-learning, opencv, gan,
Aliases: machine-vision, computervision,
Last updated: 2026-07-07 00:06:54 UTC
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https://github.com/jrzvnn/tour-in-tramuros

Realtime image recognition of tourist attractions in intramuros using YOLOv8

artificial-intelligence computer-vision image-classification machine-learning streamlit yolov8

Last synced: 22 Jun 2025

https://github.com/ppiova/azure-computervision-backgroundremoval

Azure-ComputerVision-Background removal (version 4.0 preview)

azure-ai azure-cognitive-services azure-computer-vision computer-vision csharp

Last synced: 07 Jul 2025

https://github.com/hasibzunair/road-intensity

A small attempt to monitor traffic intensity in Bangladesh.

color-segmentation computer-vision opencv video-processing

Last synced: 15 May 2026

https://github.com/deepmancer/deepmancer

"When in doubt, use brute force." - Ken Thompson

computer-science computer-vision deep-learning ml-engineering multimodal-deep-learning natural-language-processing software-engineering

Last synced: 08 May 2025

https://github.com/touradbaba/deep-learning-specialization-coursera

This repository contains programming assignments for the Deep Learning Specialization by deeplearning.AI. It includes Jupyter Notebooks for exercises in neural networks, hyperparameter tuning, convolutional networks, and sequence models.

andrew-ng andrew-ng-course backpropagation cnn computer-vision convolutional-neural-networks coursera deep-learning deeplearning-ai face-recognition hyperparameter-optimization hyperparameter-tuning keras natural-language-processing neural-network neural-networks object-detection recurrent-neural-networks rnn tensorflow

Last synced: 01 May 2025

https://github.com/torrvision/caffe-tvg

Caffe fork supporting segmentation algorithms by the Torr Vision Group

computer-vision cvpr deep-learning eccv iccv instance-segmentation panoptic-segmentation semantic-segmentation

Last synced: 01 Jul 2025

https://github.com/neemiasbsilva/django-api-computer-vision

MVISIA coding interview using Django

binary-image-segmentation computer-vision crop-image django face-detection framework opencv-python pipeline python3

Last synced: 15 May 2026

https://github.com/choyingw/buildingoutline

ICIP 2019 paper

building building-outline computer-vision edge-detection-algorithm icip image-processing l0-gradient-smoothing salient-regions semantic-segmentation

Last synced: 13 May 2025

https://github.com/flrs/genai_robotics

Learning project for exploring generative AI for robotics action planning and control

computer-vision genai generative-ai llm robotics yolo-world

Last synced: 30 Apr 2025

https://github.com/kedhareswer/ml_projects

My collection of machine learning projects and experiments.

computer-vision data-analysis data-science data-visualization datascience-machinelearning machine-learning machine-learning-algorithms machine-learning-models machinelearningprojects

Last synced: 07 Apr 2026

https://github.com/mahdi-marjani/object-tracking-entry-exit

This project implements an object counting system using the YOLOv8 object detection model from Ultralytics. The system detects and counts objects of specified classes in a video stream in real-time. It utilizes computer vision techniques to track objects as they move across a predefined line or region of interest.

ai bot computer-vision image-processing object-detection object-tracking opencv video-processing yolo yolov8

Last synced: 22 May 2026

https://github.com/aj-tap/octo

It counts and classify objects in a video and saves the results to a csv file.

computer-vision gui-application machine-learning object-counting object-detection python yolov4

Last synced: 27 Jun 2025

https://github.com/sayakpaul/experiments-on-fashion-mnist

DL experiments on the Fashion MNIST dataset curated by Zalando Research

computer-vision deep-learning fashion-mnist resnet

Last synced: 02 Apr 2025

https://github.com/prasannapulakurthi/spm

Shuffle PatchMix (SPM) for Source-Free Domain Adaptation (ICIP 2025); patch-shuffle augmentation + confidence-margin pseudo-labels. New SOTA on PACS (+7.3%), strong results on DomainNet-126 and VisDA-C.

classification computer-vision contrastive-learning data-augmentation deep-learning domain-adaptation icip-2025 image-augmentation image-classification image-processing machine-learning pseudo-labeling python pytorch self-training source-free-domain-adaptation

Last synced: 01 Mar 2026

https://github.com/piyp791/udacity-sdcndp-lane-finding

Lane detection for autonomous navigation using opencv library, done as a part of Udacity Self Driving Car Nanodegree Program

computer-vision detect-lane-lines ipython-notebook lane-finding self-driving-car udacity-self-driving-car

Last synced: 14 Apr 2025

https://github.com/ai4ce/egopat3dv2

[ICRA 2024] Official Implementation of EgoPAT3Dv2: Predicting 3D Action Target from 2D Egocentric Vision for Human-Robot Interaction

computer-vision dataset egocentric-vision human-robot-collaboration human-robot-interaction robotics

Last synced: 02 Feb 2026

https://github.com/wtupc96/channel-fusion

The author's officially PyTorch Channel-Fusion implementation.

cifar10 cifar100 classification color-space computer-vision data-augmentation deep-learning image-processing svhn transformation

Last synced: 16 Jun 2025

https://github.com/sunsided/qr

QR Code detection experiments

computer-vision image-processing jupyter opencv python qr-code qrcode

Last synced: 07 May 2025

https://github.com/sergioragostinho/cvl

(yet another) Computer Vision Library

c-plus-plus c-plus-plus-14 computer-vision

Last synced: 20 May 2026

https://github.com/ashutosh1919/context-cluster-pytorch

Ready to run PyTorch implementation of Context-Cluster: Image as Set of Points

computer-vision deep-learning image-classification machine-learning pytorch segmentation segmentation-models

Last synced: 03 Apr 2025

https://github.com/pixano/pixano-inference

Inference models for Pixano

computer-vision data-annotation data-visualization deep-learning machine-learning python

Last synced: 11 Apr 2025

https://github.com/noorkhokhar99/how-to-deploy-your-computer-vision-models-on-raspberry-pi-using-roboflow-inference

How to Deploy your Computer Vision Models on Raspberry Pi using Roboflow Inference

api computer-vision deployment inference learning machine machinelearning models object object-detection object-recognition pi pi4 python raspberrypi rasppbry roboflow

Last synced: 28 Oct 2025

https://github.com/hajin-park/v-quip

V-QUIP: A Vision-based Quick Impromptu Polling System for the Classroom

classroom-response-system computer-vision gesture-recognition mediapipe pose-estimation react-native yolo-nas

Last synced: 07 May 2025

https://github.com/geektrovert/sinext

Sign language to text with OpenCV and MNIST sign-language dataset

computer-vision opencv python python3

Last synced: 15 May 2026

https://github.com/yashrsharma44/textextractor

Repository for the webpapp for text extractor

computer-vision flask python3 text-extractor

Last synced: 17 Mar 2025

https://github.com/aqafridi/zombieskillgame

Zombies killing Game is using advanced computer Vision techniques and with Radar for Measuring accurate distance. Bytime It's Private due to some ...........

aqflow computer-vision cplusplus python pytorch ros tensorflow

Last synced: 09 Apr 2026

https://github.com/pauldanielml/point-cloud-shape-approximation

Using k-order Markov Path Optimization to fit shapes to sparse point cloud data.

computer-vision optimization point-cloud python robotics

Last synced: 18 May 2026

https://github.com/theolepage/face-detection

Simple C++ program to detect human faces in an image.

computer-vision cpp face-detection

Last synced: 21 Jul 2025

https://github.com/shan18/eva4

Deep Learning Projects in TSAI - Extensive Vision AI 4

cifar10 computer-vision convolutional-neural-networks deep-learning eva4 jupyter-notebook mnist python3 pytorch torchvision tsai

Last synced: 11 Jul 2025

https://github.com/jacobmarks/concept-space-traversal-plugin

Traverse the space of concepts with a multi-modal similarity index in FiftyOne

clip-model computer-vision embeddings fiftyone javascript mui multimodal plugin python react

Last synced: 31 Oct 2025

https://github.com/therealaj/torch

A voice-controlled assistant for the blind

alexa computer-vision microsoft-cognitive-services ocr-recognition raspberry-pi speech-recognition

Last synced: 15 May 2026

https://github.com/lddl/mot-rs

Dead simple Multi-object tracking in Rust

computer-vision multiobject-tracking tracking

Last synced: 09 Sep 2025

https://github.com/abdullahazharkhan/headsortails-opencv

Hand-gesture-based Game HeadsTails, built with Python and OpenCV.

computer-vision opencv opencv-python python

Last synced: 13 Apr 2025

https://github.com/BenSouchet/ibex-1d

Image Barcode EXtractor - Detect and Extract 1D Barcode(s) in photographs

barcode computer-vision detection-algorithm image-recognition opencv4 python python-3 python3 roi

Last synced: 01 Nov 2025

https://github.com/joonb14/tflitedetection

TensorFlow Lite Object Detection Python Implementation

computer-vision detection interpreter mobilenet object-detection python ssd tensorflow tflite tflite-model tflite-object-detection tflite-python vision

Last synced: 05 May 2025

https://github.com/dlr-rm/recall

Code and image database for IROS2022 paper "RECALL: Rehearsal-free Continual Learning for Object Classification". A algorithm to learn new object categories on the fly without forgetting the old ones and without the need to save previous images.

computer-vision continual-learning dataset deep-learning household-objects-classification incremental-learning object-classification online-learning python rehearsal-free tensorflow

Last synced: 15 May 2026

https://github.com/sayakpaul/keras-examples-randaugment

Full experimentation notebook for my Keras Example on using RandAugment.

computer-vision imgaug keras randaugment robustness tensorflow

Last synced: 10 May 2026

https://github.com/k1rsn7/kaggle

:basecamp: A collection of Kaggle solutions.

computer-vision cv data-analysis data-science deeplearning deeplearning-ai english english-language jupyter jupyter-notebook jupyter-notebooks kaggle kaggle-challenge russian russian-language

Last synced: 02 Sep 2025

https://github.com/eatosin/retina-ux-auditor

A Physics-Informed UI/UX Audit Engine. Uses Computer Vision (OpenCV Saliency/Entropy) and Gemini 3.0 Multimodal AI to mathematically quantify design quality, generate heatmaps, and prescribe actionable CSS fixes.

computer-vision gemini-api generative-ai heatmap opencv opencv-python saliency-detection ux-testing

Last synced: 25 Jan 2026

https://github.com/kawchar85/interactivemodelcomparator

A web-based tool designed for comparing output images from different machine learning models on the same dataset.

computer-vision fastapi image-viewer image-viewing image-visualization image-visualizer javascript machine-learning-models research

Last synced: 23 Oct 2025

https://github.com/cloudmedicio/describe-media-library

Describe images in the WordPress Media Library using a local large language model. Generates titles, captions, descriptions, and alt tags.

accessibility alt-text alt-text-generator apple-silicon computer-vision gpt4 intel-mac linux llama2 llamacpp llava localwp media-library ollama openai plugin search-engine-optimization seo wordpress wp-cli

Last synced: 04 Apr 2025

https://github.com/yashbansod/udacity-self-driving-car

My projects for Udacity's Self Driving Car Nanodegree program.

behavioral-cloning camera-calibration computer-vision kalman-filter keras lane-detection nanodegree neural-network self-driving-car tensorflow traffic-sign-classification udacity

Last synced: 13 May 2025

https://github.com/maximellerbach/image_segmentation_cv2

using computer vision to segment parts of an image using contours detection

computer-vision image-segmentation python

Last synced: 29 Mar 2025

https://github.com/aabduvak/object-detection-setup

The YOLOv8 Object Detection Setup allows users to perform real-time object detection using the YOLOv8 algorithm. The project is designed for simplicity and convenience, enabling users to run their models seamlessly and obtain output videos with detected objects.

computer-vision deep-neural-networks object-detection opencv yolov8

Last synced: 16 Feb 2026

https://github.com/walchko/bearsnacks

:robot: Jupyter Notebooks on robotics, computer vision, python and more

computer-vision data-science hexapod inertial-navigation-systems jupyter-notebook mathematics multiped python3 robotics space

Last synced: 08 May 2025

https://github.com/zhenye-na/viola-jones-algo

👨👩 Viola Jones Face Detection

computer-vision face-detection face-recognition viola-jones

Last synced: 14 Jun 2025

https://github.com/vijayg15/frame-extraction-from-a-video

computer-vision image-processing matlab matlab-image-processing-toolbox matlab-script video-frames

Last synced: 08 May 2025

https://github.com/matiascarabella/self-driving-ai

2D self-driving car simulation developed in Python using Pygame, featuring a Q-learning agent that learns to navigate a circuit.

2d-simulation artificial-intelligence computer-vision machine-learning pygame python q-learning reinforcement-learning self-driving-car

Last synced: 18 May 2026

https://github.com/emadehsan/food-classifier

Experimenting with Cloud Vision API. DEMO:

cloud computer-vision deep-learning gcp machine-learning vision-api

Last synced: 01 May 2025

https://github.com/abdeljalil-ounaceur/real-time-face-recognition-and-surveillance-system

A real-time surveillance system using VGG-Face for facial recognition, integrated with Apache Spark and Kafka for data processing.

apache-spark computer-vision data deep-learning facial-recognition kafka real-time surveillance-systems vgg-face

Last synced: 11 Aug 2025

https://github.com/emalagoli92/cvt-tensorflow

TensorFlow 2.X reimplementation of CvT: Introducing Convolutions to Vision Transformers, Haiping Wu, Bin Xiao, Noel Codella, Mengchen Liu, Xiyang Dai, Lu Yuan, Lei Zhang.

computer-vision deep-learning image-classification python pytorch tensorflow transformers

Last synced: 13 Apr 2025

https://github.com/salgado2004/pool_shot_predictor_contest

Programming contest hosted by CV Zone, sponsored by NVIDIA. Where the objective is to predict the paths of the ball on the pool table and whether they will go in the hole.

computer-vision contest-programming cv2 image-processing object-detection opencv-python trajectory-prediction video-processing

Last synced: 31 May 2026

https://github.com/akhilrai28/mars-rover

This project is an ambitious endeavor to create a robust, autonomous rover equipped with advanced electronics and software systems. The project focuses on integrating powerful computational frameworks, secure communication networks, and sophisticated sensor arrays to ensure the rover can navigate and operate in diverse and challenging environments.

arduino autonomous-vehicles computer-vision electronics machine-learning path-planning raspberry-pi real-time robotics ros simulation software-development teleoperation web-gui

Last synced: 03 Jul 2025

https://github.com/alejandroamat/3dgs-vulkan-cpp

Cross-platform Vulkan 3D Gaussian Splatting renderer - Windows/Mac/Linux, any GPU, with Python binding support

3d 3d-graphics 3d-reconstruction 3dgs apple computer-vision cuda differentiable-rendering gaussian-splatting glfw3 gpu gpu-acceleration linux macos nerf neural-rendering python real-time vulkan windows

Last synced: 15 Jun 2025

https://github.com/khangle2101/application-of-image-processing-and-3-dof-scara-robotic-arm-in-object-classification-based-on-color

3-DOF SCARA robot sorts colored objects using computer vision and MATLAB-based control.

arduino c computer-vision image-processing matlab robotics sensor

Last synced: 03 Mar 2026

https://github.com/vanhoai/visioncpp

🚀 High-performance C++ implementations of computer vision and image processing algorithms from scratch

cmake computer-vision cpp deep-learning edge-detection image-processing neural-network opencv

Last synced: 07 Mar 2026

https://github.com/codeperfectplus/covid19-xray-image-detection

Deep Learning and AI Enthusiasts to contribute to improving COVID-19 detection using just Chest X-rays.

computer-vision covid-19 covid19-classification deep-learning disease-classification disease-detection disease-modeling disease-prediction image-classification keras-tensorflow neural-network tensorflow2 x-ray-images x-ray-imaging

Last synced: 13 May 2025

https://github.com/ramamagarwal/project_wildlife_classification

This project deals with Wildlife Classification using Computer Vision and Image Processing

computer-vision data-augmentation image-processing machine-learning

Last synced: 08 Jul 2025

https://github.com/mikhailvokhrameev/archive_vision

A service for extracting and indexing archival document images

computer-vision ocr ocr-recognition trocr web-service

Last synced: 15 May 2026

https://github.com/dnth/mafat-fastdup-blogpost

Data insights from the MAFAT Satellite Vision challenge.

clustering computer-vision data data-visualization dataset duplicate-detection mafat-radar-challenge validation vision

Last synced: 27 Mar 2025

https://github.com/Abhradipta/OCR-With-Read-Out-Loud-Using-Python

An Optical Character Recognition (OCR) System designed using Python to read the contents out loud.

computer-vision google-tesseract google-text-to-speech natural-language-processing opencv python tesseract-ocr text-to-speech

Last synced: 03 Apr 2025

https://github.com/uni-creator/handgestureautomation

A Python-based application that lets you control your computer mouse using hand gestures captured through your webcam. Using computer vision and hand tracking technology, it enables natural mouse movements, clicks, scrolling, and drag operations without touching your physical mouse.

ai automation computer-vision hand-gesture-recognition mediapipe mouse-control opencv python

Last synced: 07 Apr 2026

https://github.com/suyashsonawane/mask-detector

A classifier built with TensorFlow2.0 which can predict wheather the subject is wearing mask or not, the model is a Convolution Model with 98% accuracy.

cnn computer-vision tensorflow

Last synced: 19 May 2026

https://github.com/shingt/visiontrackersample

A simple example app of Rectangle / Face tracker using Vision framework.

computer-vision ios swift vision

Last synced: 29 Mar 2025

https://github.com/mandyschen/bwtocolorized

Automatic image colorization for scenery.

computer-vision tensorflow

Last synced: 26 Nov 2025

https://github.com/bobmcdear/open-clip-jax

Implementation of OpenAI's CLIP in JAX/Flax

computer-vision contrastive-learning deep-learning flax jax

Last synced: 13 Apr 2025

https://github.com/sardhendu/self-driving-vehicle

Projects for Udacity's self-driving-car Nano-Degree program

advance-lane-detection computer-vision cplusplus deep-learning extended-kalman-filters kalman-filter keras lane-detection machine-learning particle-filter path-planning pid self-driving-car self-driving-car-engineer sensor-fusion tensorflow traffic-sign-classification udacity-self-driving-car

Last synced: 12 Apr 2025

https://github.com/talhaahussain/grappling-pose-identification

Third year university dissertation. Continuous Assessment for ECM3401 - Individual Literature Review and Project. Involves the implementation of a human pose estimation computer vision model to detect two combat athletes, and a machine learning algorithm to identify their grappling position.

artificial-intelligence bjj brazilian-jiu-jitsu computer-vision grappling human-pose-estimation judo mma pytorch super-gradients wrestling yolo yolo-nas

Last synced: 10 Apr 2025

https://github.com/mxagar/generative_ai_udacity

My personal notes, code and projects of the Udacity Generative AI Nanodegree.

ai computer-vision data-science diffusion-models genai generative-ai llm llm-finetuning machine-learning rag

Last synced: 08 Jul 2025

https://github.com/soran-ghaderi/cnn_low_level

A low-level implementation of Convolutional neural networks (no deep learning framework). v1.0

cnn computer-vision convolutional-neural-networks deep-learning low-level machine-learning python

Last synced: 24 Jul 2025

https://github.com/sayyedrabeeh/virtual-painter

A virtual painting app built with Python that lets you draw using hand gestures or mouse input. Powered by OpenCV & MediaPipe for real-time gesture tracking. Ideal for AI, CV, and creative tech enthusiasts!

ai-project computer-vision drawing-app gesture-control hand-tracking mediapipe opencv python virtual-painting

Last synced: 17 Jun 2025

https://github.com/williamkaroldicioccio/handwritingrecognition

Just learning PyTorch with beginner projects

computer-vision python3 pytorch

Last synced: 13 May 2026

https://github.com/bchao1/homography

2D projection geometry with homography.

computer-graphics computer-vision homography image-processing projection-geometry

Last synced: 29 Apr 2026

https://github.com/dongzhuoyao/mxnetgo

a simple scaffold of MXNet

computer-vision deep-learning image-segmentation instance-segmentation mxnet object-detection

Last synced: 03 Apr 2025

https://github.com/csfelix/data-science-studies

🐍 Data Science Studies that I update once in a blue moon 🐍

computer-vision data-science data-visualization deep-learning hypothesis-testing machine-learning math probability python statistics

Last synced: 29 Jul 2025

https://github.com/sitkevij/opencv

Small OpenCV (Open Source Computer Vision Library) Docker Image for Alpine Linux

alpine computer-vision deep-learning docker-image image-manipulation image-processing machine-learning opencv opencv-docker opencv-python

Last synced: 06 May 2026

https://github.com/iotjumpway/tass-ai

This repository provides the history of the open source TASS projects, and provides links directly to the relevant projects in our Github repos.

artificial-intelligence artificial-neural-networks computer-vision deep-learning internet-of-things iot iot-jumpway

Last synced: 27 Mar 2025

https://github.com/farhanic017/vision-tool

MCP vision server for AI agents, Claude, Cursor, OpenCode, VS Code, local LLMs, Ollama, LM Studio, OpenRouter, Gemini, image analysis, and video understanding.

ai-agent ai-agents claude-code claude-desktop computer-vision continue-dev cursor gemini image-analysis lm-studio local-llm mcp mcp-server multimodal-ai ollama opencode openrouter video-analysis vision-ai vscode

Last synced: 02 Jul 2026

https://github.com/programmin1/howtotrainyourrobot

Easy-to-use, practical example of how to train Dlib to recognize objects.

computer-vision dlib hacktoberfest webcam

Last synced: 14 May 2026

https://github.com/shobuj-paul/strawberry-stacker

Repository for Strawberry Stacker Theme of eYRC 2021-22

computer-vision drones px4-autopilot robotics

Last synced: 30 Apr 2026

https://github.com/groundlight/groundlight-mcp-server

MCP Server for Groundlight

computer-vision mcp

Last synced: 18 Jun 2025

https://github.com/thenewflesh/hidebound

Hidebound is massive, distributed digital asset management system for ML pipelines on Kubernetes

asset-management computer-vision data-science machine-learning mlops mlops-workflow vfx vfx-pipeline

Last synced: 19 Mar 2025

https://github.com/aakashjhawar/face-detection

Face Detection with OpenCV and Machine Learning

computer-vision cv2 deep-learning face face-detection face-detection-using-opencv face-detector face-embeddings machine-learning opencv python

Last synced: 08 Mar 2026

https://github.com/mjahmadee/image_captioning

Image Captioning

computer-vision image-captioning nlp

Last synced: 11 Jun 2026

https://github.com/edd-ie/computervision_bot

A simple computer vision game bot

computer-vision gamebot opencv python wingui

Last synced: 22 May 2026

https://github.com/collidingscopes/arpeggiator

Hand-controlled arpeggiator, drum machine, and audio reactive visualizer. Built with mediapipe computer vision, threejs, tonejs

arpeggio audio-reactive augmented-reality computer-vision drum-machine hand-gesture-recognition hand-tracking mediapipe music spatial-computing synthesizer threejs tonejs visualizer

Last synced: 22 Jun 2025

https://github.com/gurbaaz27/cs776a-assignments

computer-vision deep-learning machine-learning torch

Last synced: 17 Oct 2025

https://github.com/elerac/eventellipsometer

Event Ellipsometer: Event-based Mueller-Matrix Video Imaging

computer-vision event-camera mueller-matrix polarization

Last synced: 10 Apr 2025

https://github.com/adistrim/emovision

👀 EmoVision is a real-time emotion recognition project. It captures video frames from a camera, detects faces, and predicts emotions in real-time.

computer-vision neural-networks

Last synced: 23 Feb 2026

https://github.com/retkowsky/image-analysis-with-azure-computer-vision-4.0-captioning-and-dense-captioning

Image Analysis V4.0 Captioning and Dense Captioning

azure azure-computer-vision captions computer-vision

Last synced: 02 Apr 2025

https://github.com/retkowsky/many_models_image_classification

Many models image classification using Transformers models

computer-vision python transformer-models

Last synced: 24 Apr 2026

https://github.com/retkowsky/audio_analytics_with_azureml

Audio Analytics with Azure Machine Learning

aishow audio-analysis audio-processing automl azure-ml computer-vision

Last synced: 02 Apr 2025

https://github.com/zeeshier/vistai

VistAI is an AI-powered visual search for e-commerce, enabling users to upload photos and find visually similar products. Built with CLIP for image matching, FAISS for efficient similarity search, and DQN for optimized recommendations, it features a Flask-based interface. Developed by Team Recoo at Alpha Network.

ai clip computer-vision deep-learning dqn e-commerce faiss flask python reinforcement-learning visual-search web-app