Letian G.

Key Skills

Software

LabelImg

CVAT

Other

Top Subject Matter

General Object Detection (vehicles, daily items)

Natural Language Processing (Sentiment, Entities)

Marketing/Product Images

Top Data Types

Image

Text

Top Task Types

Bounding Box

Entity (NER) Classification

Freelancer Overview

Freelance Data Annotator (Images), OpenTrain AI Platform. Brings 3+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include LabelImg, CVAT, and Other. Education includes Bachelor Degree, Unknown (Zhengzhou) (2019). AI-training focus includes data types such as Image and Text and labeling workflows including Bounding Box and Entity (NER) Classification.

Labeling Experience

Image Annotator, AI Marketing Image Dataset Project

CVATImageBounding Box

As part of an AI marketing image dataset project, I labeled thousands of product images with bounding boxes. This annotation work contributed directly to accelerating a client’s AI-driven content creation process. I ensured each labeled image met specific requirements for marketing applications. • Annotated over 3,000 product images for marketing dataset • Used bounding box technique for targeted object localization • Helped reduce client’s content creation cycle by 20% • Delivered all labeled images according to quality standards

2024 - Present

Freelance Data Annotator (Text), OpenTrain AI Platform

TextEntity (NER) Classification

I conducted text data annotation for sentiment analysis and named entity recognition (NER) on the OpenTrain AI Platform. My responsibilities included processing and classifying large text datasets with high consistency. Each batch of text was labeled according to detailed project-specific guidelines. • Processed over 8,000 text entries for NER and sentiment tasks • Maintained annotation consistency to support AI NLP training • Clarified ambiguous cases with clients to minimize revision rates • Demonstrated proficiency in English for technical annotation work

2024 - Present

Freelance Data Annotator (Images), OpenTrain AI Platform

LabelImgImageBounding Box

As a freelance data annotator on the OpenTrain AI Platform, I performed extensive image annotation tasks using industry-standard tools. My work focused on accurately drawing bounding boxes around various objects such as vehicles and daily items. I ensured every annotation met strict quality guidelines for effective AI model training. • Completed over 15,000 image annotations with 98.5% accuracy • Used tools like LabelImg and CVAT for efficient workflow • Collaborated with international clients using OpenTrain’s platform • Managed time to deliver projects ahead of deadlines

2024 - Present

Education

Work History