Questions tagged “geometry”

Ask the Unique Photo creator community — gear, technique, post-processing and more.

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386

How can I estimate an object's distance from its known size and a camera's field of view?

webcamfield-of-viewdistance-estimationgeometrymeasurement

Photography Stack Exchange contributor

2y ago

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243

How can I calculate a drone camera’s height above the ground from the measured distances to the top and bottom of a known target?

dronedistance-measurementgeometrycomputer-visioncamera-calibration

Photography Stack Exchange contributor

6y ago

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178

Why is the image plane often written as z = f in the pinhole camera model?

depth-of-fieldpinhole-cameraopticscamera-modelsgeometry

Photography Stack Exchange contributor

6y ago

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229

Can you determine a camera sensor's width from focal length and an image?

lensescamera-techsensor-sizegeometryfocal-length

Photography Stack Exchange contributor

6y ago

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214

Can you estimate a camera’s position from a cityscape photo if the buildings are known?

cityscapeperspectivehistorical-photosgeometryanalysis

Photography Stack Exchange contributor

7y ago

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213

Can you calculate subject distance from its size in a photo?

pixelsdistance-estimationsensor-sizegeometryfocal-length

Photography Stack Exchange contributor

8y ago

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245

Can you estimate camera tilt from vanishing points in a single photo?

camera-tiltperspectivepost-processingvanishing-pointsgeometry

Photography Stack Exchange contributor

8y ago

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240

How do you calculate focal length in pixels from image width and horizontal field of view?

field-of-viewgeometryfocal-lengthcomputer-visioncamera-calibration

Photography Stack Exchange contributor

8y ago

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130

Will a flat subject photographed straight-on have the same scale at the center and edges?

lens-distortionperspectivegeometrysmartphone-photography

Photography Stack Exchange contributor

9y ago

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210

Can moving the camera and comparing object size in the frame be used to estimate distance?

photogrammetrydistance-measurementgeometrycamera-calibration

Photography Stack Exchange contributor

9y ago

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166

Can you calculate subject distance from two photos taken a few centimeters apart?

rangefinderstereo-visiondistance-measurementgeometrycamera-calibration

Photography Stack Exchange contributor

11y ago

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452

How can I calculate the ground area covered by a straight-down aerial photo?

aerial-photographyfield-of-viewsensor-sizegeometryfocal-length

Photography Stack Exchange contributor

11y ago

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254

How can I estimate horizontal field of view from one image using vanishing points?

field-of-viewlensperspectivevanishing-pointgeometry

Photography Stack Exchange contributor

12y ago

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136

Can I determine subject distance from a Samsung Galaxy S4 JPEG?

metadataexiffocus-distancegeometrysmartphone-photography

Photography Stack Exchange contributor

12y ago

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127

Is there a term for where a camera’s optical axis intersects the ground in a scene?

aerial-photographyopticsterminologygeometry

Photography Stack Exchange contributor

13y ago

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291

How can I estimate a distant subject’s height from a photo using focal length and distance?

field-of-viewexifgeometryfocal-lengthmeasurement

Photography Stack Exchange contributor

13y ago

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230

What is a solid angle, and why does it matter in photography?

lightingfield-of-viewopticsgeometry

Photography Stack Exchange contributor

15y ago

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285

Can you calculate how far away an object was from a photo?

distance-estimationtechniquesensor-sizegeometryfocal-length

Photography Stack Exchange contributor

15y ago

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156

How do image distances relate to viewing angle in a normal rectilinear lens?

field-of-viewlensesopticsastrophotographygeometry

user2844

16y ago