Stars Blinker vs Ham Imaging

Stars Blinker is aimed to anyone takes Deep-Sky pictures. The app allows to compare two images of the same area taken at different times, with the same or different instruments. Changes, are highlighted by the blinking of any object (star, asteroid, etc.) that only appears in one of the images or has changed position or brightness between a shot and the next. After shooting pictures of stars clusters, nebulae, galaxies and so on, often you would check if there are changes compared to the “normal" appearance of the photographed area. To do it, usually you have to search for a picture (or map) of the same area and check brightness and location of each object. Unless you have a blink comparator that, alternating the vision of two shots obtained at different times, allows to detect and highlight changes or transient phenomena (comets, variable stars, novae and supernovae, asteroids etc.). In the comparator, the sample image and the reference are shown alternately after being aligned with each other. If an object is present in only one of the pictures, it blinks and can be easily found and marked. Instead, if an object has changed position between two shots, during the animation it bounces back and forth, showing the path traveled. With Stars Blinker you can: - load pictures from the local Photo Gallery or from your iCloud; - easily align the two images: just mark the same three stars on each picture and press a button: the sample image is rotated, resized and moved to overlap the reference picture; - use images made with different instruments (I.e. comparing your picture with snapshots taken from online maps and catalogues); - manually refine alignment; - adjust blinking time interval; - invert colors to compare picture in negative; - zoom and pan the animation to frame a specific area or to examine in detail the images; - subtract Reference image from Sample to emphasize any changes; - insert a mark to highlight the position of a Transient; - add labels to report subject, date and time of shooting etc.; - save animations as short movies in your local Photo Gallery.

Ham Imaging is the picture side of amateur radio. Hold your phone to any receiver's speaker and watch slow-scan television pictures decode live, or transmit your own with your callsign printed on them — no interface box, no cables, no computer. RECEIVE • Live SSTV decode straight from your radio's audio through the device microphone • Automatic mode detection from the VIS header — leave it on Auto and the picture just appears • 20 modes decoded and encoded: Scottie 1, 2, 3, 4 and DX; Martin 1, 2 and 3; Robot 12, 24, 36 and 72; PD 50, 90, 120, 160, 180, 240 and 290; and Wraase SC2-180 • A live tuning meter and signal-confidence readout so you can peak the audio before the picture starts • Slant correction for the small clock differences that make a picture lean • The picture paints in as it arrives — you do not have to wait for the end of the frame TRANSMIT • Send any photo from your camera or gallery as an SSTV picture • Optional overlay printing your callsign, grid and a free text line onto the image • Pick the mode to suit the band and the time you have • A progress bar tracks the transmission, and you can cancel at any point • Putting a signal on the air stays your decision — the app makes the tones, you key the radio GALLERY & LOGGING • Everything you receive or send is kept together on the device with its mode and UTC time • Share a watermarked copy anywhere • Clean export — a plain copy at 800 px, exactly the format ARISS asks for in award submissions • Copy an ADIF line to paste an SSTV contact straight into Ham Logging or your desktop logger • Delete a single picture or clear the whole gallery. Nothing is ever uploaded BUILT FOR THE SHACK • Works fully offline — decoding and encoding never need an internet connection • Light and dark themes, adjustable font size, weekly tips and in-app version history • Your callsign and grid stay on your device • No account, no ads, no analytics and no tracking PERFECT FOR • Operators working the HF SSTV picture nets • Anyone chasing ISS / ARISS SSTV events and award submissions • Shortwave listeners who want to see what those warbling tones actually are • Newcomers who want to try SSTV without buying an interface • Clubs demonstrating amateur radio to visitors and students PRIVACY • Your callsign, grid and email are stored only on your device. • No account, no sign-up, no ads, no analytics SDKs, no advertising ID and no tracking of any kind. 73 de A41UX Yousuf AL Balushi — Unixeer, Oman