HCC2D Decoder vs SSTV Lite

This app allows you to scan and decode HCC2D and QR code symbols using your mobile camera. It is based on advanced research in high-capacity barcode technologies and provides reliable decoding. Key features: * Decode HCC2D color codes. * Full support for standard QR codes. * Real-time scanning using the camera. * Robust detection and error correction. * No ads and no registration required. HCC2D is a color two-dimensional code format that increases data capacity compared to traditional QR codes while preserving their structure. By using multiple colors, each module can encode more information, enabling higher data density in a compact symbol. The app captures images, detects barcode regions, corrects perspective distortions, and analyzes color or intensity patterns to reconstruct the encoded data. To transfer files from a desktop computer to your smartphone via a stream of HCC2D codes, use HCC2D Decoder together with the HCC2D Streamer desktop companion app. Notes: HCC2D codes can be created using the official online generator at hcc2d.com, the HCC2D Encoder application, the open-source CLI encoder, or the Debian/Ubuntu packages provided through the official HCC2D APT repository. * Low-quality color printing may reduce decoding performance * Best results are achieved with screen-displayed or high-quality printed codes and a high-resolution autofocus camera. * One-dimensional barcodes are intentionally not supported. References: * Querini, M. (2026). HCC2D Code Specification — Version 0.9.0. Zenodo. https://doi.org/10.5281/zenodo.22206528. Licensed under the Creative Commons Attribution-NoDerivatives 4.0 International License (CC BY-ND 4.0). * Querini, M. and Italiano, G. F. (2014). Reliability and Data Density in High Capacity Color Barcodes. Computer Science and Information Systems, 11(4), 1595-1615. * Querini, M., Grillo, A., Lentini, A., and Italiano, G. F. (2011). 2D Color Barcodes for Mobile Phones. IJCSA, 8(1), 136-155. * Querini, M. (2010). Analysis and Design of High-Capacity Two-Dimensional Codes. Development of the Reader for Desktop and Mobile Environments (Bilingual Digital Edition 2026, Version 1.0). Zenodo. https://doi.org/10.5281/zenodo.22206722 Notice: This application is an independent personal project and is not affiliated with any organization or institution.

A free reception is used only after a complete image is saved. Failed or partial receptions do not count. Built-in practice is unlimited. Existing free users receive three new successful receptions once. A one-time purchase unlocks unlimited receiving plus SSDV, ETSI Digital Radio Mondiale (radio broadcast standard), callsign overlays, FSK/CW IDs, templates and automated transmit. Saving a station callsign remains free. Free sharing includes the App Store badge and QR link. Permanent Full Unlock enables original-image sharing and optional download branding. Decode SSTV and Weather Fax signals into images, receive ISS SSTV transmissions, or turn your own pictures into transmit-ready audio. Receive live signals through the microphone or decode supported audio files. SSTV monitors the spectrum, adjusts frequency and slant, and lets you keep useful partial decodes when a transmission ends early. Prepare and transmit images in a broad range of Martin, Scottie, Robot, PD, Pasokon, monochrome, FAX and AVT modes. Save decoded images and generated WAV files in clear RX/TX archives. Built for iPhone, iPad and Mac: • Guided Simple and Advanced modes • Station profile and QSO logbook • Private iCloud sync across devices and editions • Professional Signal Desk with live spectrum • On-device decoding and encoding • Automatic frequency and slant correction • Partial-image saving for useful incomplete decodes • Mode guide with timing and resolution details • Receive and transmit history • Doppler-aware satellite tracking, pass reminders and provider-aware tuning • SSDV and advanced digital image reception, callsign overlays, FSK/CW IDs, templates and automation • Portrait and landscape layouts • Localized interface in 12 languages Share received images as cards with saved reception details and optional callsign and grid locator. For amateur-radio operators, satellite listeners and anyone curious about pictures carried by sound. Link received FSK callsigns to image history, share cards and QSO drafts. Compare and correct images after reception while preserving the original. Re-decode retained audio when available. Explore historical satellite and space-station receptions. Play original recordings and clearly labeled synthetic practice audio through the receiver. Historical practice is free and does not use your reception allowance.