加载图片并进行预处理

def loadData(filePath):
	f = open(filePath, 'rb')
	data = []
	img = image.open(f)
	m, n = img.size
	for i in range(m):
		for j in range(n):
			x, y, z = img.getpixel((i, j))
			data.append([x/256.0, y/256.0, z/256.0])
	f.close()

	return np.mat(data), m, n

imgData, row, col = loadData('xxxxxx.jpg')