Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [camera]

A camera is an optical or opto-electronic device that records a 2D image of a 3D scene. Cameras can be still cameras (photography) or video cameras for moving images.

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Why is there no rolling shutter when using a mechanical shutter?

So I know it might not be the best place to ask this question, but maybe some of you are familiar with the mechanics of digital mirrorless cameras and the technology of CMOS sensors. I don't quite understand why electronic image sensors, that create…
Thomas D.
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What challenges restrict the resolution of spacefaring digital cameras?

I've been reading up about NASA's Juno mission, and came across the Wikipedia article about JunoCam, which is Juno's onboard visible-light camera. In the article, it's mentioned that the resolution of the sensor is 1200x1600 pixels, which comes out…
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Why is it so expensive to produce cameras for non visible light?

Typical consumer cameras can capture wavelength of 390-700 nm 400-1050 nm. But why is it so difficult and expensive to produce cameras for infrared, ultraviolet, hard x-rays, etc.? The only thing which differs them are the wavelength and the energy…
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How do I make use of a scrapped CCD sensor from a scanner?

I obtained an old scanner with no power adapter. I wired it up to something with a compatible adapter, but apparently this particular scanner is very tied to it's power supply(even though it's suppose to be regular 12V DC). There were numerous…
Earlz
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What is special about camera flash capacitors?

Capacitor manufacturers offer capacitor series that are specifically targeted on camera flash applications. For example, Rubycon has the FW series, and NCC has the PH series. These have working voltages of about 300V to 330V and a typical…
realtime
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DSLR Hotshoe wiring to Arduino

I want to wire the hotshoe of my dslr (Nikon D5100) to my Arduino board in order to react to the shutter release of the camera. I measured a 5 to 8 volts signal between the trigger and the ground lugs when I push the shutter release. So my…
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What is this test pattern used for? (Computer vision, camera distortion mapping)

I came across a test pattern a few years back in a robotics laboratory that I remember being told was some sort of test pattern to train cameras for robotic vision. It was like some sort of checkerboard pattern but it was not a uniform pattern.…
stbtra
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Affordable stereo vision camera for industrial applications?

I am looking for the best value stereo camera for use in an agricultural vision control application. Since all the vendors do their damnest to hide the cost of their equipment, it's proving to be extraordinarily hard to get even a slight idea of…
mathrick
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What's the difference between a thermal imaging sensor and an infrared CCD?

I was always under the impression that thermal radiation is essentially infrared energy, so what's the difference between a full thermal imaging camera (e.g. an FLIR) and a standard infrared CCD chip? Surely the latter should function as the former?…
Polynomial
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Processor with hardware camera interface port?

I was looking for a processor to interface to the DVP port of a 5MP CMOS camera module. I could possibly write the software for doing this but I've heard that many processors have a hardware camera interface port that makes the job much…
Kevin Boyd
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Tiny 8MSPS DSPs?

I have a problem: I've got five tiny CMOS image sensors (2mm x 2mm), each in a small space (about 10mm x 15mm). They take a clock signal in, and output an analog signal, requiring an 8MSPS ADC each. Somehow I need to get the image data into a PC.…
Rocketmagnet
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Disassembling a camera - dealing with a flash capacitor

I'm disassembling a broken old camera (an Olympus FE-110) and I've learned that I should be really careful with the capacitor inside. I wanted to follow the guide linked at the bottom of this article, though in this camera make it's not that easy…
Andrey
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Fake a panasonic battery to revive camera to copy photos from internal memory

Got this camera from a friend, battery door broken, no cables, no battery. There are some important photo's on this camera that I want to copy from internal memory to SD card. We first want to try this because USB requires an special USB cable we…
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dvp vs mipi camera interface

I have a CPU board (NanoPI M1) which specifies it has a DVP 24-pin camera port. However many of the usual camera modules (like OV5647) says they have both DVP and MIPI support. How would it generally work to connect one of them to a DVP port?
Rolle
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Using an inertial measurement unit to compute global motion optical flow of video

I have a camera rigidly mounted together with an IMU that consists of 2-dof gyroscopes and 3-dof accelerometers. My aim is to compute the global optical flow of the image captured by the camera, in order to do global motion compensation when…
Ang Zhi Ping
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