Did I hear somthing? On 10/15/06, J. C. O'Connell <[EMAIL PROTECTED]> wrote: > No, it isnt. > > Dynamic range is INDEPENDENT > Of bit depth. Bit depth only > Determines the NUMBER of shades, > Not the absolute range of shades > Because that is controlled via analog scaling > In the design before & after A/D & D/A stages. > Bit depth is simply the number of shades available > In the system, that's all. > jco > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of > Perry Pellechia > Sent: Sunday, October 15, 2006 2:31 PM > To: Pentax-Discuss Mail List > Subject: Re: K10D 22 bit A/D conversion > > Everyone is wrong but you! > > Yes higher number of bit will yield better fideleity. That's not the > issue. Dyanamic range is also linked to bit size. If you do not want > to understand this that is your loss. > > > On 10/15/06, J. C. O'Connell <[EMAIL PROTECTED]> wrote: > > No you are wrong and so is your link if that's what > > You think it is saying. No matter what dynamic > > Range you want to capture, its possible to do it > > With any number of bits (or bit depth ). The greater > > Bit depth just allows better fidelity (more gray > > Steps total) but it doesn't determine the maximum > > And minimum recorded signal levels which is what dynamic > > Range is. > > jco > > > > -----Original Message----- > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf > Of > > Perry Pellechia > > Sent: Sunday, October 15, 2006 2:00 PM > > To: Pentax-Discuss Mail List > > Subject: Re: K10D 22 bit A/D conversion > > > > No you are wrong. Dynamic range determines how small a signal you can > > detect in the presence of a larger signal. Bit depth determine > > dynamic range. If is a matter of definition and not open to > > interpretation. > > > > Do yourself a favor and do some research before you start making > > statements that are wrong. You are only making a fool of yourself. > > Stick to the K/M arguments. > > > > > > > > http://en.wikipedia.org/wiki/Dynamic_range > > > > On 10/15/06, J. C. O'Connell <[EMAIL PROTECTED]> wrote: > > > WRONG- the bit depth determines size of the steps > > > Or signal fidelity. Dynamic range is determined by > > > Simple scaling the of analog signal. What you > > > Are saying is a common misconception but its just > > > That a misconception. Its possible to lower bit > > > Depth while maintaing dynamic range, you just end > > > Up with cruder gray scale rendering. > > > jco > > > > > > -----Original Message----- > > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf > > Of > > > Perry Pellechia > > > Sent: Sunday, October 15, 2006 1:07 PM > > > To: Pentax-Discuss Mail List > > > Subject: Re: K10D 22 bit A/D conversion > > > > > > Wrong, Bit depth does determine dynamic range. The ratio of the > least > > > significant bit to the most significant bit is by definition the > > > dynamic range of the ADC. > > > > > > On 10/15/06, J. C. O'Connell <[EMAIL PROTECTED]> wrote: > > > > Maxium output voltage from the sensor has nothing > > > > To do with bit depth of the ADC. Bit depth of the ADC > > > > Determines number of shades not the dynamic range. > > > > jco > > > > > > > > -----Original Message----- > > > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > Behalf > > > Of > > > > graywolf > > > > Sent: Sunday, October 15, 2006 10:09 AM > > > > To: Pentax-Discuss Mail List > > > > Subject: Re: K10D 22 bit A/D conversion > > > > > > > > The sensor output is an analog voltage. The ADC converts that to a > > > > digital number. What is being said here is that they do not feel > the > > > max > > > > > > > > output voltage from the sensor is high enough to require a 22 bit > > ADC. > > > > As I said in another post I feel that is way over simplified. > > > > > > > > -- > > > > graywolf > > > > http://www.graywolfphoto.com > > > > http://webpages.charter.net/graywolf > > > > "Idiot Proof" <==> "Expert Proof" > > > > ----------------------------------- > > > > > > > > > > > > J. C. O'Connell wrote: > > > > > I don't follow you. Is the capture (sensor & ADC) done at 22 > bits > > or > > > > 12 > > > > > bits? > > > > > jco > > > > > > > > > > -----Original Message----- > > > > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > > Behalf > > > > Of > > > > > Digital Image Studio > > > > > Sent: Sunday, October 15, 2006 7:32 AM > > > > > To: Pentax-Discuss Mail List > > > > > Subject: Re: K10D 22 bit A/D conversion > > > > > > > > > > On 15/10/06, J. C. O'Connell <[EMAIL PROTECTED]> wrote: > > > > >> But its been pre-processed digitally so its not true RAW > > > > >> In my opinion. That's the only reason why the 22 bit processing > > > > >> Makes sense to me. Do the capture and preprossing at 22 bits > > > > >> And downconvert to 12 bit RAW for final output. > > > > > > > > > > Well you are free to hold that position but to me the output > from > > > the > > > > > CCD has just been sampled and massaged to fit the 12 bit RAW > > profile > > > > > optimally. We don't know the data depth in processing, we only > > know > > > > > that the CCD is sampled with 22 bit data precision. The 12 bit > RAW > > > > > file is contains discrete RGB data sampled under a Bayer filter > > > > > pattern so it has to undergo significant post processing for it > to > > > be > > > > > even recognised as a colour image. > > > > > > > > > > > > > -- > > > > PDML Pentax-Discuss Mail List > > > > [email protected] > > > > http://pdml.net/mailman/listinfo/pdml_pdml.net > > > > > > > > > > > > -- > > > > PDML Pentax-Discuss Mail List > > > > [email protected] > > > > http://pdml.net/mailman/listinfo/pdml_pdml.net > > > > > > > > > > > > > -- > > > <----------------------------------------------------> > > > Perry Pellechia > > > > > > Primary email: [EMAIL PROTECTED] > > > Alternate email: [EMAIL PROTECTED] > > > Home Page: http://homer.chem.sc.edu/perry > > > <----------------------------------------------------> > > > > > > -- > > > PDML Pentax-Discuss Mail List > > > [email protected] > > > http://pdml.net/mailman/listinfo/pdml_pdml.net > > > > > > > > > -- > > > PDML Pentax-Discuss Mail List > > > [email protected] > > > http://pdml.net/mailman/listinfo/pdml_pdml.net > > > > > > > > > -- > > <----------------------------------------------------> > > Perry Pellechia > > > > Primary email: [EMAIL PROTECTED] > > Alternate email: [EMAIL PROTECTED] > > Home Page: http://homer.chem.sc.edu/perry > > <----------------------------------------------------> > > > > -- > > PDML Pentax-Discuss Mail List > > [email protected] > > http://pdml.net/mailman/listinfo/pdml_pdml.net > > > > > > -- > > PDML Pentax-Discuss Mail List > > [email protected] > > http://pdml.net/mailman/listinfo/pdml_pdml.net > > > > > -- > <----------------------------------------------------> > Perry Pellechia > > Primary email: [EMAIL PROTECTED] > Alternate email: [EMAIL PROTECTED] > Home Page: http://homer.chem.sc.edu/perry > <----------------------------------------------------> > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net >
-- <----------------------------------------------------> Perry Pellechia Primary email: [EMAIL PROTECTED] Alternate email: [EMAIL PROTECTED] Home Page: http://homer.chem.sc.edu/perry <----------------------------------------------------> -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
