從一幅圖像中提取綠色矢量

Question

我想從一幅圖像中提取綠色矢量。圖像上有紅色和綠色的點，並制定電網

def each_green_vector(im): 
    pixels = im.load_image(im) 
    utils.apply_to_each_pixel(pixels, lambda x: 0.0 if x >10 else 1.0) 

    msize = m_mesh.rows*m_mesh.cols; 
    (x, y) = imsize 
    vec = [] 
    for i in range(1,x -1): 
     for j in range (1, y -1): 
      grid = grid_at(pixels, i, j) 
      if grid != "none": 
       if grid ==1: 
        vec.append((i,j)); 
        gx = list[i].x/m_mesh.gWidth; 
        gy = list[i].y/m_mesh.gHeight; 
        grid = gx + gy *m_mesh.cols; 
        vec[grid] == 1; 
    return vec 

Answer 1

一種可能的方式我能想到的是使用misc庫SciPy的的。這link可以給你更多的細節，但基本的思路是這樣的

from scipy import misc 
arr = misc.imread(im) # 640x480x3 array 
arr[20, 30] # all 3 vectors of a pixel 
arr[20, 30, 1] # only green value for a pixel