Matt Blaze
@mattblaze.federate.social.ap.brid.gy
Scientist, safecracker, etc. McDevitt Professor of Computer Science and Law at Georgetown. Formerly UPenn, Bell Labs. So-called expert on election security and […]
🌉 bridged from ⁂ https://federate.social/@mattblaze, follow @ap.brid.gy to interact
🌉 bridged from ⁂ https://federate.social/@mattblaze, follow @ap.brid.gy to interact
There are also ventilation structures for the various railroad and subway tunnels that cross the NYC rivers, but their smaller size makes them less prominent. (The electric trains that use these tunnels don't produce exhaust that has to be as aggressively vented as in an automotive tunnel).
Let […]
Let […]
Original post on federate.social
federate.social
November 11, 2025 at 4:41 PM
There are also ventilation structures for the various railroad and subway tunnels that cross the NYC rivers, but their smaller size makes them less prominent. (The electric trains that use these tunnels don't produce exhaust that has to be as aggressively vented as in an automotive tunnel).
Let […]
Let […]
Manhattan boasts six large ventilation towers serving the four automobile tunnels that cross the Hudson and East Rivers: two each for the Lincoln and Holland tunnels, and one each for the Queens-Midtown and Brooklyn Battery Tunnels.
All sport an industrial art deco design reflecting their […]
All sport an industrial art deco design reflecting their […]
Original post on federate.social
federate.social
November 11, 2025 at 4:41 PM
Manhattan boasts six large ventilation towers serving the four automobile tunnels that cross the Hudson and East Rivers: two each for the Lincoln and Holland tunnels, and one each for the Queens-Midtown and Brooklyn Battery Tunnels.
All sport an industrial art deco design reflecting their […]
All sport an industrial art deco design reflecting their […]
The Lincoln Tunnel, opened in 1937, is a multi-tube automobile tunnel that connects midtown Manhattan with Weehawken, NJ under the Hudson (North) river. To provide fresh air and remove dangerous car exhaust, three ventilation towers (two in Manhattan and one in NJ) exchange the air in the […]
Original post on federate.social
federate.social
November 11, 2025 at 4:41 PM
The Lincoln Tunnel, opened in 1937, is a multi-tube automobile tunnel that connects midtown Manhattan with Weehawken, NJ under the Hudson (North) river. To provide fresh air and remove dangerous car exhaust, three ventilation towers (two in Manhattan and one in NJ) exchange the air in the […]
Rodenstock HR Digaron-W 32mm/4.0 lens (@ f/7.1), Phase One IQ4-150 back (@ ISO 64), Cambo WRS 1250 camera, shifted vertically -5mm, horizontally -15mm. Cropped a bit.
This humble and functional, yet handsome, art deco structure is the easternmost of three ventilation towers for the Lincoln […]
This humble and functional, yet handsome, art deco structure is the easternmost of three ventilation towers for the Lincoln […]
Original post on federate.social
federate.social
November 11, 2025 at 4:40 PM
Rodenstock HR Digaron-W 32mm/4.0 lens (@ f/7.1), Phase One IQ4-150 back (@ ISO 64), Cambo WRS 1250 camera, shifted vertically -5mm, horizontally -15mm. Cropped a bit.
This humble and functional, yet handsome, art deco structure is the easternmost of three ventilation towers for the Lincoln […]
This humble and functional, yet handsome, art deco structure is the easternmost of three ventilation towers for the Lincoln […]
Reposted by Matt Blaze
Also, whenI use the term “quality” here, I’m using it a strictly technical sense to refer to the fidelity of the image, not the aesthetic qualities of the image. I very much dislike this usage, but it’s fairly standard in discussing this stuff.
November 10, 2025 at 10:18 PM
Also, whenI use the term “quality” here, I’m using it a strictly technical sense to refer to the fidelity of the image, not the aesthetic qualities of the image. I very much dislike this usage, but it’s fairly standard in discussing this stuff.
Reposted by Matt Blaze
Related: Shift is also (more often) used to maintain geometric accuracy in certain subjects even in non-stitched images. It's the secret weapon of architectural photography. Here's a little thread I did on it a while back.
https://federate.social/@mattblaze/112544286031247617
https://federate.social/@mattblaze/112544286031247617
federate.social
November 10, 2025 at 9:44 PM
Related: Shift is also (more often) used to maintain geometric accuracy in certain subjects even in non-stitched images. It's the secret weapon of architectural photography. Here's a little thread I did on it a while back.
https://federate.social/@mattblaze/112544286031247617
https://federate.social/@mattblaze/112544286031247617
Reposted by Matt Blaze
I generally use a Phase One (medium format) digital back on a Cambo "WRS" camera for making my stitched images. This system provides a fair amount of room for movements.
But there are less expensive and cumbersome alternatives. For 35mm-format, both Canon and Nikon make a few "perspective […]
But there are less expensive and cumbersome alternatives. For 35mm-format, both Canon and Nikon make a few "perspective […]
Original post on federate.social
federate.social
November 10, 2025 at 8:38 PM
I generally use a Phase One (medium format) digital back on a Cambo "WRS" camera for making my stitched images. This system provides a fair amount of room for movements.
But there are less expensive and cumbersome alternatives. For 35mm-format, both Canon and Nikon make a few "perspective […]
But there are less expensive and cumbersome alternatives. For 35mm-format, both Canon and Nikon make a few "perspective […]
Reposted by Matt Blaze
Technical cameras are specialized devices, and they need special lenses that can "cover" - project an image onto - an area larger than the sensor (to allow the shifting). All this is makes everything bigger, heavier, and more expensive. But they allow for making stitched composites without […]
Original post on federate.social
federate.social
November 10, 2025 at 8:34 PM
Technical cameras are specialized devices, and they need special lenses that can "cover" - project an image onto - an area larger than the sensor (to allow the shifting). All this is makes everything bigger, heavier, and more expensive. But they allow for making stitched composites without […]
Reposted by Matt Blaze
To avoid having to do any transforms at all, you need to capture the component images without moving the camera AT ALL. No panning, no tilting.
But with most cameras, that would mean every component would be of exactly the same image. There'd be nothing to stitch together!
Enter the "technical […]
But with most cameras, that would mean every component would be of exactly the same image. There'd be nothing to stitch together!
Enter the "technical […]
Original post on federate.social
federate.social
November 10, 2025 at 8:23 PM
To avoid having to do any transforms at all, you need to capture the component images without moving the camera AT ALL. No panning, no tilting.
But with most cameras, that would mean every component would be of exactly the same image. There'd be nothing to stitch together!
Enter the "technical […]
But with most cameras, that would mean every component would be of exactly the same image. There'd be nothing to stitch together!
Enter the "technical […]
Reposted by Matt Blaze
Finding the nodal point can be tricky. There are special rigs for this that move the camera on the tripod head to make this easier and more systematic and repeatable.
But even with the panning and tilting done at the exact nodal point, the software still has to do considerable, resolution […]
But even with the panning and tilting done at the exact nodal point, the software still has to do considerable, resolution […]
Original post on federate.social
federate.social
November 10, 2025 at 8:17 PM
Finding the nodal point can be tricky. There are special rigs for this that move the camera on the tripod head to make this easier and more systematic and repeatable.
But even with the panning and tilting done at the exact nodal point, the software still has to do considerable, resolution […]
But even with the panning and tilting done at the exact nodal point, the software still has to do considerable, resolution […]
Reposted by Matt Blaze
Once you've selected where the tripod goes, the simplest thing to do is pan and tilt the camera on the tripod head between captures, pointing it at different areas of the subject such that there's some overlap between captures.
For best results, this must be done with the camera mounted on the […]
For best results, this must be done with the camera mounted on the […]
Original post on federate.social
federate.social
November 10, 2025 at 8:12 PM
Once you've selected where the tripod goes, the simplest thing to do is pan and tilt the camera on the tripod head between captures, pointing it at different areas of the subject such that there's some overlap between captures.
For best results, this must be done with the camera mounted on the […]
For best results, this must be done with the camera mounted on the […]
Reposted by Matt Blaze
Basically, the more the perspective changes among the components, the more geometric transformation the software has to do in order to line up the edges to tile them together. Any transformation comes at the expense of resolution and distortion of other parts of the final image.
So the first […]
So the first […]
Original post on federate.social
federate.social
November 10, 2025 at 8:05 PM
Basically, the more the perspective changes among the components, the more geometric transformation the software has to do in order to line up the edges to tile them together. Any transformation comes at the expense of resolution and distortion of other parts of the final image.
So the first […]
So the first […]
Reposted by Matt Blaze
First, since you're gluing together multiple images, you obviously don't want the subject moving between captures. Buildings (except during, say, earthquakes) are well suited to this as subjects, but you also want to make sure that any people, cars, etc, don't appear in more than one of the […]
Original post on federate.social
federate.social
November 10, 2025 at 7:58 PM
First, since you're gluing together multiple images, you obviously don't want the subject moving between captures. Buildings (except during, say, earthquakes) are well suited to this as subjects, but you also want to make sure that any people, cars, etc, don't appear in more than one of the […]
Reposted by Matt Blaze
The power station has long been an iconic landmark on the south bank of the Thames, distinctive for its four prominent smokestacks (two for each of its two separate generating facilities) and industrial art deco architecture. Perhaps most famously, it featured in the cover art for Pink Floyd's […]
Original post on federate.social
federate.social
November 10, 2025 at 6:26 PM
The power station has long been an iconic landmark on the south bank of the Thames, distinctive for its four prominent smokestacks (two for each of its two separate generating facilities) and industrial art deco architecture. Perhaps most famously, it featured in the cover art for Pink Floyd's […]
Reposted by Matt Blaze
London's Battersea Power Station, built as two nearly-identical halves completed in 1935 and 1955, respectively, was originally a coal-fired electrical generating plant. It was decommissioned in 1983. After being idle for nearly 40 years, the plant has been re-developed as retail space and […]
Original post on federate.social
federate.social
November 10, 2025 at 6:25 PM
London's Battersea Power Station, built as two nearly-identical halves completed in 1935 and 1955, respectively, was originally a coal-fired electrical generating plant. It was decommissioned in 1983. After being idle for nearly 40 years, the plant has been re-developed as retail space and […]
Reposted by Matt Blaze
Rodenstock 70mm/5.6 Digaron-W (@ f/8), Phase One IQ4-150 digital back (@ ISO 50), Cambo WRS 1200 camera (right shifted 20mm, vertically shifted 8mm).
This composition fully exploited the image circle and edge sharpness of the lens. We're to the right of the power station, but to preserve the […]
This composition fully exploited the image circle and edge sharpness of the lens. We're to the right of the power station, but to preserve the […]
Original post on federate.social
federate.social
November 10, 2025 at 6:25 PM
Rodenstock 70mm/5.6 Digaron-W (@ f/8), Phase One IQ4-150 digital back (@ ISO 50), Cambo WRS 1200 camera (right shifted 20mm, vertically shifted 8mm).
This composition fully exploited the image circle and edge sharpness of the lens. We're to the right of the power station, but to preserve the […]
This composition fully exploited the image circle and edge sharpness of the lens. We're to the right of the power station, but to preserve the […]
@Sc0tty now, I should also mention tilt, another movement in which you move the lens and the sensor planes out of parallel alignment, to control focus. There, the general rule is to shift at the rear, and tilt at the front.
November 10, 2025 at 11:09 PM
@Sc0tty now, I should also mention tilt, another movement in which you move the lens and the sensor planes out of parallel alignment, to control focus. There, the general rule is to shift at the rear, and tilt at the front.
@Sc0tty generally you want to move the back to avoid disturbing the perspective. But, depending on the camera, you can move either, often in opposite directions, to achieve a greater amount of shift.
November 10, 2025 at 10:59 PM
@Sc0tty generally you want to move the back to avoid disturbing the perspective. But, depending on the camera, you can move either, often in opposite directions, to achieve a greater amount of shift.