Webtagr - Technology News Summarizer

Extracting Depth Maps from iPhone HEIC Files: A Deep Dive into a Python Script

2025-06-04

This article delves into a Python script that extracts depth maps and metadata from HEIC files captured by iPhones and converts them into OpenEXR files. The author details the script's functionality, including color space conversion and image processing using oiiotool, and metadata extraction using exiftool. The article also showcases the author's powerful workstation setup and steps for installing necessary packages. Ultimately, readers learn how to leverage this script to process iPhone HEIC images and obtain more professional image data.

(tech.marksblogg.com)

Development depth maps

Depth Anything V2: Testing on Maxar Satellite Imagery of Bangkok

2025-05-23

This post details a test of the Depth Anything V2 depth estimation model on Maxar satellite imagery of Bangkok. Using a powerful workstation, the author first attempted inference on a large image, but failed due to black areas in the source image confusing the model. A second attempt with a smaller image yielded much better results, producing a depth map, though further processing is needed to calibrate height information.

(tech.marksblogg.com)

AI depth estimation

GeoDeep: Object Detection in Maxar Satellite Imagery of Myanmar and Thailand

2025-04-13

This post details using the Python package GeoDeep to perform object detection on Maxar's open satellite imagery of Myanmar and Thailand, following a recent earthquake. Leveraging a high-performance workstation, the author runs GeoDeep's built-in AI models to detect cars, trees, buildings, and roads. The results reveal varying accuracy and efficiency across different models, with some exhibiting missed detections and false positives. The experiment highlights the potential and challenges of AI-powered object detection in satellite image analysis.

(tech.marksblogg.com)

Tech object detection

Wyvern Satellite Imagery Geocoding: Mapbox Enables Data Visualization

2025-03-15

Wyvern released a metadata catalog for its satellite imagery, including image locations and capture metadata. Using Mapbox's free geocoding service (100K searches per month), the developer downloaded this metadata and successfully linked each image's address details to its geographic location. This resulted in a 33-line JSONL file containing geographic location data. Each record includes various image formats (GeoTIFF, preview images, etc.), latitude/longitude coordinates, bounding boxes, and more, facilitating subsequent data visualization and analysis.

(tech.marksblogg.com)

Tech geocoding

Satellogic Opens its 7M+ Image Satellite Data Feed

2025-03-04

Satellogic, a satellite designer, manufacturer, and constellation operator, has announced an open satellite data feed program called "Satellogic EarthView." This program contains over 7 million unique images from more than 3 million locations, offering 1-meter resolution RGB and near-infrared imagery. The author details the analysis of Satellogic's constellation, launch history, and the process of accessing and working with the open data, creating visualizations that highlight spatial distribution and temporal coverage.

(tech.marksblogg.com)

Tech satellite data remote sensing spatial data analysis