yossioo

<sdf version='1.6'>
  <model name='r1'>
    <link name='base_link'>
      <pose frame=''>0 0 0 0 -0 0</pose>
      <inertial>
        <pose frame=''>-0.0045 0 0.0234 0 -0 0</pose>
        <mass>10</mass>
        <inertia>
          <ixx>0.136322</ixx>
          <ixy>0</ixy>

yossioo

from skimage.io import imread, imsave
import numpy as np
img = imread('img.png')
cpc = int(np.floor( float(img.shape[0])/2 ))
cpr = int(np.floor( float(img.shape[1])/2 ))
img[cpc, cpr, :] = [102, 204, 102]
imsave('out_img.png',img)