Questions tagged “geometry”

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

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193

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

webcam field-of-view distance-estimation geometry measurement

Photography Stack Exchange contributor

2y ago

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116

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?

drone distance-measurement geometry computer-vision camera-calibration

Photography Stack Exchange contributor

6y ago

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103

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

depth-of-field pinhole-camera optics camera-models geometry

Photography Stack Exchange contributor

6y ago

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143

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

lenses camera-tech sensor-size geometry focal-length

Photography Stack Exchange contributor

6y ago

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147

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

cityscape perspective historical-photos geometry analysis

Photography Stack Exchange contributor

7y ago

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127

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

pixels distance-estimation sensor-size geometry focal-length

Photography Stack Exchange contributor

7y ago

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123

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

camera-tilt perspective post-processing vanishing-points geometry

Photography Stack Exchange contributor

8y ago

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124

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

field-of-view geometry focal-length computer-vision camera-calibration

Photography Stack Exchange contributor

8y ago

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

lens-distortion perspective geometry smartphone-photography

Photography Stack Exchange contributor

9y ago

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

photogrammetry distance-measurement geometry camera-calibration

Photography Stack Exchange contributor

9y ago

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

rangefinder stereo-vision distance-measurement geometry camera-calibration

Photography Stack Exchange contributor

10y ago

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263

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

aerial-photography field-of-view sensor-size geometry focal-length

Photography Stack Exchange contributor

11y ago

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140

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

field-of-view lens perspective vanishing-point geometry

Photography Stack Exchange contributor

11y ago

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

metadata exif focus-distance geometry smartphone-photography

Photography Stack Exchange contributor

12y ago

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

aerial-photography optics terminology geometry

Photography Stack Exchange contributor

12y ago

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156

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

field-of-view exif geometry focal-length measurement

Photography Stack Exchange contributor

13y ago

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146

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

lighting field-of-view optics geometry

Photography Stack Exchange contributor

15y ago

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172

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

distance-estimation technique sensor-size geometry focal-length

Photography Stack Exchange contributor

15y ago

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

field-of-view lenses optics astrophotography geometry

user2844

15y ago