Hy there
I’m using a H7 Board and an OV7725 Image sensor with firmware version 3.6.7
My question is below, here is some info on the application:
I would like to take a snapshot in “high res”, save the image and do some computations on a reduced (in size and color) image, then look for tags/markers/rois within the reduced image.
After i have found some roi’s, i want to reload the high res image, get those rois (from the higer res image) and decode the info I expect to find.
The Question:
I’m Trying to save a VGA/RGB585 Image as a .ppm, but it dosen’t seem to work if i go above QVGA (with QVGA the script runs fine).
Say if i set framesize to VGA, i get the following error: OSError: Image is not PPM!
I have looked trough the doc and the forum, to no availe, what am i missing?
import sensor, image, time, pyb, machine
sensor.reset()
sensor.set_pixformat(sensor.RGB565)
sensor.set_framesize(sensor.VGA)
clock = time.clock()
fname = "tempImg.ppm"
cnt = 0;
t_save = 0;
t_load = 0;
while(cnt < 100):
clock.tick()
img = sensor.snapshot()
now = pyb.millis()
img.save(fname)
t_save = pyb.millis() - now + t_save
now = pyb.millis()
img = image.Image(fname, copy_to_fb = True)
t_load = pyb.millis() - now + t_load
img.draw_cross(100,100,(255,0,0),30,2)
img.save(fname)
cnt = cnt + 1
print(clock.fps())
print("ran " + str(cnt) + "times, avg save: " + str(t_save/cnt) + ", avg load: " + str(t_load/cnt))
sensor.skip_frames(time = 2000)
machine.reset()
Thanks for your time