Quote:
Originally Posted by cornelious2
Speak for yourself. Exposure time is based on the medium you used and how much time it takes to capture the image under a given light condition. The sensor is the same thing as the lens and that is independent of the media. that's the reason why back in the day people had to sit perfectly still for minutes at a time to take a picture while now you can snap crazy numbers of pictures onto film into film. now that we are digital its not light directly onto film its light compressed into a file. That is the bottle neck in our exposure.
Again the digital capture process is the exposure time for our photo or the time it takes to pull the image off of the sensor. Which is a function of video processing.
here is an article which explains what I am talking about
http://www.articlesbase.com/advertis...lay-73100.html |
I am sorry but that article is COMPLETE garbage. The writer is an utter hack, and it's no surprise his "e-zine" is a broken link.
There are so many things wrong with your understanding of the situation it's not funny. And if you're reading babble like the article above, I can see why.
I am going to have trouble even composing a logical, coherent response because your understanding is so off-base.
1. Motion blur in TP photos is caused by slow shutter speed.
2. Shutter speed is an integral component of basic photographic exposuring. Indeed all substrates have effective "ISO ratings" that reflect their light sensitivity, and that property is also an integral part of basic photographic exposuring. The sensor is the medium in digital cameras.
3. Shutter lag -- the delay between pressing the shutter button and the actual photo being taken -- has zero relationship to the shutter speed used for exposuring.
3. Our camera sensors use "electronic shutters", which is really a system of hardware and software controls that allow reading out of data from the image sensor into the processing hardware. The sensor behaves essentially identically to film -- it gathers charge based on its length of exposure to light. This length of exposure must be precisely controlled in order to properly process the data into an image.
4. Sensor readout is usually a quick process, but more importantly, it is irrelevant to taking a single photo. By the time the readout process begins, the exposure time is over and data is shifted out of the light-gathering areas of the sensor to the data pipeline areas.
5. There is no way you can have a digital camera operating without active control of all aspects of exposuring. Shutter speed, which is one such aspect, is controlled by a simple timer; image processing either of the preview image or of the final image is not part of the shutter speed equation whatsoever, nor can it be, because it is variable and would render the camera unreliable.
6. The real way to boost shutter speed in the context of proper exposuring is to either a. open up the aperture or b. increase the sensor effective ISO. Since cell phone cameras usually have fixed apertures, b. is the only option for speeding up shutter speed in low light. This is apparently the deficient part of the TP's camera; it does not aggressively boost effective ISO to freeze motion in low light. This can only be solved by modifying the camera control and processing software; the D3D driver obviously does neither.
7. The article you cite is first of all irrelevant to what we are discussing here, but also is completely wrong. The image processing he speaks of occurs AFTER the photo is exposed, after any shutter lag would have any effect. The only thing faster image processing would speed up would be shot-to-shot time, or, if the camera had a buffer, buffer clearing.