[opendtv] Re: coverstory_8_11_14.pdf
- From: Craig Birkmaier <craig@xxxxxxxxxxxxx>
- To: "opendtv@xxxxxxxxxxxxx" <opendtv@xxxxxxxxxxxxx>
- Date: Thu, 21 Aug 2014 08:16:45 -0400
Yup. It is why film has a grainy appearance when shot at low light levels or
blown up too much.
Regards
Craig
> On Aug 20, 2014, at 6:25 PM, Cliff Benham <flyback1@xxxxxxxxxxx> wrote:
>
> Remember, the distribution of grains of silver on a photographic film are
> *RANDOM*
> while those on an electronic sensor are *NOT*.
>
> This distinction makes quite a difference in image quality.
>
> Cliff
>
>> On 8/18/2014 9:30 AM, Craig Birkmaier wrote:
>> Well said Bert.
>>
>> Regards
>> Craig
>>
>>> On Aug 17, 2014, at 9:13 PM, "Manfredi, Albert E"
>>> <albert.e.manfredi@xxxxxxxxxx> wrote:
>>>
>>> Cliff Benham wrote:
>>>
>>>> Here is a quote from someone in Hollywood writing on the TIG website.
>>>>
>>>> "Commercially available HD images are all of 14 years old. When HD
>>>> is 100 years old like film is, considering how far things have come
>>>> in just 14 years, I expect that its capabilities will *far* surpass
>>>> what the very last of the neg could do.
>>>>
>>>> They just need to move away from single sensor Bayer filtered crap
>>>> where colors are made up out of math. And yes, I said Bayer
>>>> filtered crap."
>>>
>>> But, Cliff. In color film, colors are *also* made up out of math. The only
>>> significant difference is that film grain doesn't consist of a
>>> deterministic pattern or pixels, as digital sensors have.
>>>
>>>> And remember: Digital will never be as good as Analog because
>>>> digital always throws away part of the image. Always.
>>>
>>> As does analog. The problem is the same. You need to constrain channel
>>> bandwidth, for practical implementations. In analog, your tools are simpler
>>> and more crude, that's all. So you do things like limit the high frequency
>>> content more, limit the color saturation more, limit the frame rate more
>>> (e.g. with interlacing tricks), and that sort of thing. Resulting in that
>>> soft, unsaturated image that we were led to believe was the best TV could
>>> do.
>>>
>>> Digital only affords more sophisticated techniques. For example, with
>>> digital, not having to transmit over and over again a part of the scene
>>> that has not changed conserves bandwidth requirements. That bandwidth can
>>> instead be put to use in transmitting sharper edges than the analog system.
>>> And/or, more intense colors. And/or, a whole lot of extra program material.
>>>
>>> Bert
>>>
>>>
>>>
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