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Hello, We implemented a image segementation algorithm using TMS320C6711 DSP Imaging Developers Kit (IDK) on real time video. The problem is: due to the complexity (computations involved) of the algorithm, there is a delay in the video,i.e., i am missing some frames. I wanted to know how many frames i am missing. Can anyone suggest me how to caluculate the number of frames being missed. Secondly, i am using some math functions like sin and cos in my code as follows: for(row=0; row<240; row++) for(col=0; col<320; col++) if (sobel[row][col] > 200) for(k=0; k<360; k+ ) { arg= (3.142*k)/(180.0); x = (int)roundf(row + R*cos(arg)); y = (int)roundf(col + R*sin(arg)); if ((x>=0) && (x<240)) if ((y>=0) && (y<320)) circle_acc[x][y] +=1; } it is taking time to do the above computation which is one of the reasons for losing the frames, may be because i am using cos and sin functions. Can anyone suggest me how i can optimize it or is there any way to perform cos and sin functions using assembly coding. Thank you, Jay ===== Gullapalli Jayaroop (SHAPE of VICTORY) Mailing Address 700, Woodland Avenue, A308 Lexington, kentucky-40508, USA. Home Phone: 859-323-9711 |
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help on TMS320C6711 DSP Imaging Developer’s Kit (IDK)
Started by ●December 6, 2002
Reply by ●December 6, 20022002-12-06
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Precompute the 18 sin(arg) and cos(arg) values and store them in an array. There are probably many other things that can be done as well. Andrew At 03:06 PM 12/5/2002 -0800, jayaroop g wrote: >Hello, > We implemented a image segementation algorithm >using TMS320C6711 DSP Imaging Developers Kit (IDK) on >real time video. > The problem is: due to the complexity >(computations involved) of the algorithm, there is a >delay in the video,i.e., i am missing some frames. >I wanted to know how many frames i am missing. Can >anyone suggest me how to caluculate the number of >frames being missed. > Secondly, i am using some math functions like >sin and cos in my code as follows: > >for(row=0; row<240; row++) > for(col=0; col<320; col++) > if (sobel[row][col] > 200) > for(k=0; k<360; k+ ) > { > arg= (3.142*k)/(180.0); > x = (int)roundf(row + R*cos(arg)); > y = (int)roundf(col + R*sin(arg)); > if ((x>=0) && (x<240)) > if ((y>=0) && (y<320)) > circle_acc[x][y] +=1; > } > >it is taking time to do the above computation which is >one of the reasons for losing the frames, may be >because i am using cos and sin functions. Can anyone >suggest me how i can optimize it or is there any way >to perform cos and sin functions using assembly >coding. > >Thank you, >Jay >===== >Gullapalli Jayaroop (SHAPE of VICTORY) >Mailing Address >700, Woodland Avenue, A308 >Lexington, >kentucky-40508, >USA. >Home Phone: 859-323-9711 |
