[Vxl-users] how to speed up the image data accessing?

[Alex T. <thi...@gm...>]

Dear VXL users:


    I try to access the image data using iterator

    vil_image_view<float> img(....);
    float *iterator = img.begin();
    float output =  *(iterator+100);

    this section above will repeat millions of times.

    the computing speed is slower (30%) than the one using opencv witch is
using array

    like

    IplImage *img = cvCreateImage(.....);
    float *data = (float *) img->imageData;
    float output =  data[100];

    they are both using gray image

    Did i miss something ?

    Thanks.


Alex.