Created
February 28, 2019 05:26
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Gabor Filter (OpenCV/Python)
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import cv2 | |
import numpy as np | |
class CvTrackbar: | |
def __init__(self, name, window_name, val, max_val, callback=None): | |
self.__name = name | |
self.__window_name = window_name | |
cv2.createTrackbar(name, window_name, val, max_val, callback or CvTrackbar.nothing) | |
def value(self): | |
return cv2.getTrackbarPos(self.__name, self.__window_name) | |
@classmethod | |
def nothing(v=None, u=None): | |
pass | |
def create_gabor_bgr_image(gabor, size): | |
gabor_image = gabor.copy() | |
cv2.normalize(gabor, gabor_image, 0, 255, cv2.NORM_MINMAX) | |
gabor_image = gabor_image.astype(np.uint8) | |
gabor_image = cv2.cvtColor(gabor_image, cv2.COLOR_GRAY2BGR) | |
gabor_image = cv2.resize(gabor_image, size) | |
return gabor_image | |
WINDOW_TITLE = 'gabor' | |
GABOR_IMG_SIZE = (200, 200) | |
TARGET_FILENAME = 'sample.png' | |
img = np.zeros((1), np.uint8) | |
target_src = cv2.imread(TARGET_FILENAME) | |
cv2.namedWindow(WINDOW_TITLE) | |
angle_tb = CvTrackbar('angle', WINDOW_TITLE, 0, 180) | |
while True: | |
cv2.imshow(WINDOW_TITLE, img) | |
ksize = (10, 10) | |
sigma = 2.0 | |
theta = (np.pi / 180) * angle_tb.value() | |
lambd = 10 | |
gamma = 0.5 | |
gabor = cv2.getGaborKernel(ksize, sigma, theta, lambd, gamma) | |
target_image = cv2.filter2D(target_src, -1, gabor) | |
gabor_image = create_gabor_bgr_image(gabor, GABOR_IMG_SIZE) | |
target_image = cv2.resize(target_image, None, fx=0.5, fy=0.5) | |
gabor_area_image = np.zeros((target_image.shape[0], GABOR_IMG_SIZE[1], 3), np.uint8) | |
gabor_area_image[:GABOR_IMG_SIZE[0], :GABOR_IMG_SIZE[1]] = gabor_image | |
img = cv2.hconcat([gabor_area_image, target_image]) | |
k = cv2.waitKey(1) & 0xFF | |
if k == 27: | |
break | |
cv2.destroyAllWindows() |
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Please can you share the sample image file?