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GeneralRe: About memory copy speedup Pin
Prakash Nadar1-Mar-04 18:42
Prakash Nadar1-Mar-04 18:42 
GeneralRe: About memory copy speedup Pin
John M. Drescher1-Mar-04 18:48
John M. Drescher1-Mar-04 18:48 
GeneralRe: About memory copy speedup Pin
Daniel Turini1-Mar-04 19:30
Daniel Turini1-Mar-04 19:30 
GeneralRe: About memory copy speedup Pin
w_yufeng1-Mar-04 19:35
w_yufeng1-Mar-04 19:35 
GeneralRe: About memory copy speedup Pin
Daniel Turini1-Mar-04 21:20
Daniel Turini1-Mar-04 21:20 
GeneralRe: About memory copy speedup Pin
Lido Paul1-Mar-04 22:30
Lido Paul1-Mar-04 22:30 
GeneralRe: About memory copy speedup Pin
Daniel Turini2-Mar-04 0:43
Daniel Turini2-Mar-04 0:43 
GeneralRe: About memory copy speedup Pin
Lido Paul2-Mar-04 15:02
Lido Paul2-Mar-04 15:02 
Daniel Turini wrote:
as you'll be reducing a memory transfer of 400MB/second to 200MB/second. 200MB/second is still a big figure
i dont understand .

thanks.
as you said ,the ccd buffer is circular.u can see the denoise-func below:
Yn = a*Xn + b*Yn_1 + c*Xn_1
Yn is the image that is denoised and will be showed.Xn is the raw image that ccd grab currently.Xn_1 is the raw image that was grabed last time, Yn_1 is the image that was processed last time.that is ,ccd buffer carrys raw data before process and carrys ripe data after it.we must save copy raw data to Xn_1 and Xn .so that is why I must copy data twice.
I think that there maybe not have the better method to solve the problem.Now I just pin my hope on the update of the computer hardware.
thanks a lot


Happy Gemini
GeneralRe: About memory copy speedup Pin
Resolver2-Mar-04 22:39
professionalResolver2-Mar-04 22:39 
GeneralModem dialup to retrieve data from SQL 2000 Server... Pin
DengJW1-Mar-04 17:21
DengJW1-Mar-04 17:21 
GeneralRe: Modem dialup to retrieve data from SQL 2000 Server... Pin
Prakash Nadar1-Mar-04 17:31
Prakash Nadar1-Mar-04 17:31 
GeneralRe: Modem dialup to retrieve data from SQL 2000 Server... Pin
DengJW1-Mar-04 18:24
DengJW1-Mar-04 18:24 
GeneralRe: Modem dialup to retrieve data from SQL 2000 Server... Pin
John M. Drescher1-Mar-04 18:39
John M. Drescher1-Mar-04 18:39 
GeneralRe: Modem dialup to retrieve data from SQL 2000 Server... Pin
DengJW1-Mar-04 19:04
DengJW1-Mar-04 19:04 
GeneralRe: Modem dialup to retrieve data from SQL 2000 Server... Pin
John M. Drescher1-Mar-04 19:28
John M. Drescher1-Mar-04 19:28 
GeneralRe: Modem dialup to retrieve data from SQL 2000 Server... Pin
DengJW1-Mar-04 19:36
DengJW1-Mar-04 19:36 
GeneralProblem sovled. Thank u all. Cause is ... Pin
DengJW1-Mar-04 21:07
DengJW1-Mar-04 21:07 
QuestionThough here is C++ but I have a database problem? Pin
DengJW1-Mar-04 16:36
DengJW1-Mar-04 16:36 
AnswerRe: Though here is C++ but I have a database problem? Pin
Prakash Nadar1-Mar-04 18:35
Prakash Nadar1-Mar-04 18:35 
GeneralRe: Though here is C++ but I have a database problem? Pin
DengJW1-Mar-04 18:52
DengJW1-Mar-04 18:52 
GeneralRe: Though here is C++ but I have a database problem? Pin
Prakash Nadar1-Mar-04 19:17
Prakash Nadar1-Mar-04 19:17 
GeneralRe: Though here is C++ but I have a database problem? Pin
DengJW1-Mar-04 19:50
DengJW1-Mar-04 19:50 
AnswerThank u all. Sovled problem. the cause is WIn2k modules corrupted Pin
DengJW1-Mar-04 21:05
DengJW1-Mar-04 21:05 
GeneralCreating child processes within a window Pin
perrymail20001-Mar-04 16:07
perrymail20001-Mar-04 16:07 
GeneralRe: Creating child processes within a window Pin
Joe Woodbury1-Mar-04 18:37
professionalJoe Woodbury1-Mar-04 18:37 

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