Jump to content

Talk:Image sensor

Page contents not supported in other languages.
From Wikipedia, the free encyclopedia
This is an old revision of this page, as edited by Dicklyon (talk | contribs) at 17:10, 27 July 2019 (Freme). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

Sensors used in digital cameras (table)

1. Given the vast number of digital cameras available, each with different sensor/filter/architecture configurations, I can't see how this "product comparison" table could ever hope to achieve its goal! 2. IMO, the data it contains is too specific for this article, and takes up a lot of screen space. Please may I remove it ? --Redbobblehat (talk) 13:51, 15 February 2011 (UTC)[reply]

Good luck with that, many people place a lot of faith in counting pixels and considering sensor areas. If anything, may I suggest creating another page called "List of electronic image sensor configurations"? Ehusman (talk) 03:07, 16 February 2013 (UTC)[reply]
I had the same thought, and just moved the info. Timtempleton (talk) 01:49, 28 April 2017 (UTC)[reply]

Article needs improvement

This article is not very useful because it does not clearly explain how image sensing is done. I don't see the need for having a huge table with sensor names and sizes when what the article really needs is a section that unveils the technology (possibly before making the CCD/CMOS technology comparison). This section is somewhat unclear: "Neither technology has a clear advantage in image quality.[citation needed] On one hand, CCD sensors are more susceptible to vertical smear from bright light sources when the sensor is overloaded; high-end CMOS sensors in turn do not suffer from this problem. On the other hand, cheaper CMOS sensors are susceptible to undesired effects that come as a result of rolling shutter.[citation needed]". Also, what would be the source of the overload?

ICE77 (talk) 00:12, 17 November 2015 (UTC)[reply]

Agreed. I assumed, coming here, I'd find out how the shutter-speed is managed. Seems like a trivial enough thing. Nothing. JohndanR (talk) 15:05, 27 July 2019 (UTC)[reply]
Typically, that's done with a conventional mechanical shutter (focal-plane shutter in the case of DSLRs). Electronic rolling shutter is also common. I'll add something. Dicklyon (talk) 16:45, 27 July 2019 (UTC)[reply]

This article seems biased toward CMOS sensors over CCD sensors, as it touts CMOS's improved speed and cheaper cost, but does not include information regarding CMOS's greater susceptibility to noise over CCDs (especially in low light conditions). — Preceding unsigned comment added by 162.201.27.32 (talk) 00:02, 12 July 2017 (UTC)[reply]

How is this analog?

"Each cell of a CCD image sensor is an analog device. When light strikes the chip it is held as a small electrical charge in each photo sensor". How is this analog? The photoelectric effect is literally the starting point of quantum mechanics, exchanging a quanta of light for a charge carrier (see Einstein 1905 and his Nobel prize 1921). The info and explanation in the article are the kind of things you would get from a guy at your local electronics store: lots of numbers and no actual understanding. Pixel counts are also a relatively low grade of information for an encyclopedia page, more useful would be a plot of pixel count in time and 2-3 notable milestones. Fincle (talk) 17:27, 16 June 2016 (UTC)[reply]

It's analog because there is no way to count the photoelectrons; instead, the charge is measured via an analog voltage. Dicklyon (talk) 03:04, 8 March 2017 (UTC)[reply]

Sensors for security cameras, best sensor for specific purposes

I've read more than once that one type of sensor (that is, either CMOS or CCD) is better for security cameras in that it can capture colors better in low light conditions. (Of course, that may change as either technology advances.) Still, I'd like to suggest / request that a section be included (possibly a table) that does something like list which technology is better for specific applications (maybe security cameras, point and shoot cameras, cell phones, high end cameras, video cameras, and maybe separating into categories like low light applications, high resolution applications, or something similar).

Companies list

The following is unsourced and WP:OR - needs to be based on reliable sourcing. Move here per WP:PRESERVE; per WP:BURDEN please do not restore without citing reliable sources at the same time, that support the restored content.

Companies

The largest companies that manufacture imaging sensors include the following:

-- Jytdog (talk) 02:36, 8 March 2017 (UTC)[reply]

References

Freme

"Because the color gel segment must be separated from the others by a freme (similar to stained glass windows)"... does that word really exist? MarkMLl (talk) 18:53, 20 September 2018 (UTC)[reply]

I took it out. The whole sentence was nonsense. There is no frame or freme or other structure around the filters. Dicklyon (talk) 17:10, 27 July 2019 (UTC)[reply]