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Questions tagged [projection]

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How to convert insta360 .insp format to equirectangular format compatible with photosphere viewers?

I've been playing with an insta360 X3 camera. It produces .insp format JPEG files containing two round views, side-by-side, from the two image sensors. The file size is 5952x2976 pixels. Does ...
Chris Uhlik's user avatar
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0 answers
54 views

Turn photofilm into projector

I have a photo film, and I want to make an old-style photo projector from it. The problem with simply using the film is that it's the negative of the photo. I figured out 2 solutions: shoot the ...
arsdever's user avatar
  • 101
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1 answer
342 views

Displaying non rectangular image with projector

I am trying to display a non rectangular image via a projector. Like this How does this work? Can a projector "display" a transparent background?
AndiYo's user avatar
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2 answers
192 views

Help designing a mini slide projector

After spending the better part of a year thinking about designing a tiny film projector I am beginning the process. I know the basics of photography but I find it very difficult to calculate what ...
J Shields's user avatar
2 votes
2 answers
829 views

Geocoordinate calculation for aerial oblique image using camera and plane yaw, pitch, roll, and position data

I have a requirement to calculate the ground footprint for an aerial camera. The photos are TerraPhotos. TerraPhoto user guide provide camera position and plane orientation in .IML file. Additionally, ...
CoolCK's user avatar
  • 121
1 vote
2 answers
103 views

What type of projection system is used in Brideshead Revisited episode 5?

In the beginning of episode 5 of Brideshead Revisited there is a scene where one of the characters uses a "Universal Projector" to show some slides. It can currently be watched here, about ...
Calvin's Hobbies's user avatar
2 votes
1 answer
114 views

Calculating small projection distance

I'm trying to build a small slide projector but (being a lens noob) I'm not able to get a proper focused image. I'm trying to achieve this: I've got a 20mm (biconvex?) lens with a focal length of 50....
Sephen's user avatar
  • 121
4 votes
2 answers
312 views

Does a slide made from color reversal film take damage when used for several hours in a slide projector?

So I'm planning on projecting slides made from color reversal film for a long continuous amount of time in an old fashioned slide projector and was wondering how much damage the heat from the ...
Jeffrey's user avatar
  • 349
2 votes
1 answer
192 views

Is there a way to produce this "little planet"-type self portrait in a single-exposure?

The BBC News article UK Antarctic meteorite hunt bags large haul shows this ultra wide angle and likely "little planet"-type of self portrait. I can't understand how this effect is produced. While ...
uhoh's user avatar
  • 1,817
1 vote
1 answer
535 views

Pixel diameter of a given field of view calculation equisolid (equal-area) fisheye lens

I have a 180° equisolid (equal-area) fisheye lens with a focal length of 8 mm. I want to crop images to a circle defined by an angular field of view from the zenith angle of the lens (i.e. the middle ...
John L. Godlee's user avatar
0 votes
2 answers
189 views

What JPEG settings for projection with Epson EH-TW5210?

I shoot in raw and edit with Lightroom. What settings, such as resolution and aspect ratio, should I use to export JPEGs for presentation using an Epson EH-TW5210 Full HD 1080p, 1920 x 1080, 16:9 ...
lrkwz's user avatar
  • 207
1 vote
3 answers
645 views

How can I make mirror images of digit camera image files?

My problem is that I am using a SONY a6000 mirrorless ILC and eyepiece projection to take images of solar system objects using a Schmidt Cassegrain Telescope. (SCT). Prime focus photography with an ...
user69754's user avatar
2 votes
1 answer
318 views

How to determine the projection (Stereographic, equidistant etc.) of my fisheye lens?

I have a Fujinon FE185C057HA fisheye lens and I want to know its projection. Is there a software tool I can use to do this? I have the lens with me so I can take ...
db7638's user avatar
  • 129
3 votes
1 answer
1k views

Did nitrate film stock provide different/better B&W and color projection quality?

The NPR News item What's The Issue With Nitrate Film Stock? It's Combustible describes substantial effort made at the 2017 TCM Film Festival to upgrade a projection booth in order to more safely ...
uhoh's user avatar
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1 vote
1 answer
3k views

How to convert Ricoh Theta equirectangular pictures to rectilinear? [duplicate]

I would like to extract a portion of an equirectangular 360x180 panorama taken with a Theta S and convert it to what I think is a rectilinear image (a picture where straight lines are shown as such ...
user3783407's user avatar
4 votes
3 answers
4k views

How can I test that the image is inverted in a pinhole camera?

I learned that a pinhole camera inverts the image on the film strip: Is it to possible to test if the image gets inverted without the film strip on which the image is projected? For example: I made ...
user963241's user avatar
2 votes
2 answers
4k views

How to un-spherize an image using Photoshop?

Assume I have a traditional panorama. I use a spherize technique (e.g., in Photoshop) to produce a spherical image. Some time later, I want to take the spherical image and get back the landscape (...
Tony's user avatar
  • 123
5 votes
2 answers
3k views

What is the relationship between field of view and focal length for fisheye?

What is the relationship between the focal length and field of view for an equal-area ("equisolid") projection fisheye lens? Alternatively, what is the relationship between the 180-degree image ...
Szabolcs's user avatar
  • 2,883