VFX Atlas
M 024 / 18301 Edge & Featuresalgorithm output

FAST Corners

edge & features

Typeface · Nova Cut

Atlas demonstration: the free source photo and the computed FAST Corners. Two coffee cups are placed diagonally against a field of dark beans and a light surface. The digital markers precisely trace the individual outlines and high-contrast edges of the scattered coffee beans.
Atlas demonstration: the free source photo and the computed FAST Corners. Two coffee cups are placed diagonally against a field of dark beans and a light surface. The digital markers precisely trace the individual outlines and high-contrast edges of the scattered coffee beans.Image: PICSELI picseli · CC0 (via Wikimedia Commons), processed for the AtlasView source ↗

Prompt

Apply FAST Corners as a sparse feature-detection overlay, placing small bright green crosses at sharp corners, junctions, and distinctive texture points. Leave smooth surfaces largely unmarked, use uniform marker sizes, and preserve the photograph's natural lighting and colors beneath the digital annotations. Keep the original subject and composition.

Paste it into LetzAI with your own image to apply the effect ↗

Identify

The output displays small digital markers highlighting sharp angles and distinct points of texture1 across the image.

Principle

The algorithm checks a circular ring of pixels surrounding a specific center pixel2. It identifies a corner if a continuous arc of those ring pixels is significantly brighter or darker than the center.

Try it out

Adjust the brightness threshold to see how it filters out weaker corners in soft shadows.

Classification

Calculated image processing result.

Further examples · 9 images

FAST Corners, applied to “Idyllic landscape with a waterfall (Unsplash)”
02 FAST Corners, applied to “Idyllic landscape with a waterfall (Unsplash)”A scenic waterfall plunges down a lush green cliffside under a twilight sky. The feature detection clearly maps the jagged rock faces and the high-frequency textures of the grassy slopes.Robert Lukeman robertlukeman (photo); processed for the Atlas · CC0 · Wikimedia Commons
FAST Corners, applied to “Charred Tomato (Unsplash)”
03 FAST Corners, applied to “Charred Tomato (Unsplash)”This image captures a breakfast scene featuring toast and eggs in a dark pan. Key feature points are extensively mapped across the grain of the bread and the high-contrast rim of the cooking vessel.Hans Vivek rickyzden (photo); processed for the Atlas · CC0 · Wikimedia Commons
FAST Corners, applied to “Fresh From the Market (Unsplash)”
04 FAST Corners, applied to “Fresh From the Market (Unsplash)”Small baskets filled with vibrant red and orange cherry tomatoes are displayed at an outdoor market. The computational markers clearly isolate the sharp junctions between individual fruits and the edges of their containers.Anne Preble annepreble (photo); processed for the Atlas · CC0 · Wikimedia Commons
FAST Corners, applied to “Seafood Market in Japan (Unsplash)”
05 FAST Corners, applied to “Seafood Market in Japan (Unsplash)”Pieces of octopus and ice are arranged in a metal tray at a seafood market. The algorithm populates the suction cups and glistening edges of the tentacles with numerous yellow indicators.Alex Knight agkdesign (photo); processed for the Atlas · CC0 · Wikimedia Commons
FAST Corners, applied to “Patterns in Desert Sand (Unsplash)”
06 FAST Corners, applied to “Patterns in Desert Sand (Unsplash)”Sand dunes ripple across a desert landscape beneath a sky filled with light clouds. The markers identify the sharpest ridges of the sand and the high-contrast edges of the cloud formations.Diego Jimenez diegojimenez (photo); processed for the Atlas · CC0 · Wikimedia Commons
FAST Corners, applied to “Queen Victoria Market walk (Unsplash)”
07 FAST Corners, applied to “Queen Victoria Market walk (Unsplash)”A person walks through an urban market space toward a city skyline. The detection process focuses heavily on the structural lines of the overhead beams and the complex geometry of the distant buildings.Linda Xu rhindaxu (photo); processed for the Atlas · CC0 · Wikimedia Commons
FAST Corners, applied to “Pug in a blanket (Unsplash)”
08 FAST Corners, applied to “Pug in a blanket (Unsplash)”A small dog is wrapped tightly in a soft, brown blanket. Yellow circular markers cluster heavily around the dog's eyes, nose, and the edges of its head where high-contrast texture is found.Matthew Henry matthewhenry (photo); processed for the Atlas · CC0 · Wikimedia Commons
FAST Corners, applied to “Fruit, magazine and iPhone at Port Stanley (Unsplash)”
09 FAST Corners, applied to “Fruit, magazine and iPhone at Port Stanley (Unsplash)”A pineapple, a phone, and a magazine rest on a checkered picnic blanket on the sand. Feature detection rings are most visible along the spiky leaves of the fruit and the sharp lettering on the magazine cover.Pineapple Supply Co. pineapple (photo); processed for the Atlas · CC0 · Wikimedia Commons

Sources