I added my own function to the py_image.c file and call it using the img object. However, the LED flashes white rapidly when I call this function in the script. What's the reason?

OpenMV Boards
1 
#define EDGE_COUNT_THRESHOLD    15  // 跳变个数阈值

static mp_obj_t py_image_in_place_detection(size_t n_args, const mp_obj_t *args, mp_map_t *kw_args) {

int result = 0;

image_t \*arg_img = py_image_cobj(args\[0\]);



printf("1111111");



mp_obj_list_t \*roi_list = MP_OBJ_TO_PTR(args\[1\]);



int x = mp_obj_get_int(roi_list->items\[0\]);

int y = mp_obj_get_int(roi_list->items\[1\]);

int w = mp_obj_get_int(roi_list->items\[2\]);

int h = mp_obj_get_int(roi_list->items\[3\]);



if (w <= 0 || h <= 0 || x < 0 || y < 0) {

    printf("result: 0 (invalid roi)\\n");

    return mp_obj_new_int(0);

}



int img_width = arg_img->w;

uint8_t \*base = (uint8_t \*)arg_img->pixels;



    int edge_count = 0;



    for (int yy = 0; yy < h; yy++) {

        uint8_t \*row_ptr = base + (y + yy) \* img_width;

        int last_pix = -1;



        for (int xx = 0; xx < w; xx++) {

            int pix = imlib_get_pixel_fast(arg_img, row_ptr, x + xx);



            if (last_pix != -1 && pix != last_pix) {

                edge_count++;

            }

            last_pix = pix;

        }

    }



    // 纵向跳变

    for (int xx = 0; xx < w; xx++) {

        int last_pix = -1;

        int px = x + xx;



        for (int yy = 0; yy < h; yy++) {

            uint8_t \*row_ptr = base + (y + yy) \* img_width;

            int pix = imlib_get_pixel_fast(arg_img, row_ptr, px);



            if (last_pix != -1 && pix != last_pix) {

                edge_count++;

            }

            last_pix = pix;

        }

    }

    result = (edge_count > EDGE_COUNT_THRESHOLD) ? 1 : 0;



    return mp_obj_new_int(result);

}

static MP_DEFINE_CONST_FUN_OBJ_KW(py_image_in_place_detection_obj, 1, py_image_in_place_detection);

{MP_ROM_QSTR(MP_QSTR_in_place_detection),    MP_ROM_PTR(&py_image_in_place_detection_obj)},

QDEF1(MP_QSTR_in_place_detection, 28662, 18, “in_place_detection”)
2

That means you corrupted memory or crashed the program, you kind of need to debug your own C code. We don’t provide help support for that.

See the tutorial on this for how to use a debugger: 10. Building, flashing, and debugging the firmware - OpenMV MicroPython 1.28 documentation