Question

我想将RGB图像分成块8x8 = 64（块中的像素）并从块中提取像素颜色。我已将图像分成块8x8：

w, h = img.size # width, height of image
bw, bh = 8, 8 # block size
img = Image.open('anyimage.JPG')

img = np.array(img)

sz = img.itemsize
shape = (h-bh+1, w-bw+1, bh, bw
strides = (w*sz, sz, w*sz, sz) 
blocks = np.lib.stride_tricks.as_strided(img, shape=shape, strides=strides)

print blocks[1,1]

我在块中得到这个值：

[[169 185 147 170 186 149 170 187]
 [139 161 122 140 162 122 140 162]
 [131 135 113 131 135 118 135 142]
 [170 186 147 170 186 147 170 188]
 [142 164 124 142 164 122 140 162]
 [136 138 113 137 141 114 138 142]
 [174 191 148 174 191 147 173 190]
 [142 164 126 144 166 125 143 165]]

如何从块中提取所有像素颜色？

Answer 1

你可以尝试

pixels = img.load()

all_pixels = []
for x in range(block_width): #put your block width size
    for y in range(block_height): #your block heigh size
        cpixel = pixels[x, y] #reading elements from pixel on location (x,y)
        all_pixels.append(cpixel)

以tupple的形式将每个像素附加到all_pixel。例如

(111, 222, 255) #R-G-B

如何将图像分成块并找到像素颜色

1 个答案: