def prewit_detection(image, image_height, image_width):
pixels = np.array(image)
horizontal_matrix = get_prewit_horizontal_matrix()
horizontal_image = np.zeros((image_height, image_width))
vertical_matrix = get_prewit_vertical_matrix()
vertical_image = np.zeros((image_height, image_width))
new_image = np.zeros((image_height, image_width))
window_y_center = 1
window_x_center = 1
for y in range(window_y_center, image_height - window_y_center):
for x in range(window_x_center, image_width - window_x_center):
horizontal_image[y, x] = get_convolution(pixels, x, y,
horizontal_matrix, 3)
vertical_image[y, x] = get_convolution(pixels, x, y,
vertical_matrix, 3)
new_image[y, x] = sqrt(
pow(horizontal_image[y, x], 2) + pow(vertical_image[y, x], 2))
save_image(horizontal_image, save_path + "prewit_horizontal_image.ppm")
save_image(vertical_image, save_path + "prewit_vertical_image.ppm")
save_image(new_image, save_path + "prewit_generated_image.ppm")
image_one = Image.fromarray(
lineally_adjust_image_values(horizontal_image, image_width,
image_height))
image_two = Image.fromarray(
lineally_adjust_image_values(vertical_image, image_width,
image_height))
image_three = Image.fromarray(
lineally_adjust_image_values(new_image, image_width, image_height))
image_one.show()
image_two.show()
image_three.show()
def four_direction_border_detection(image,
image_height,
image_width,
famous_matrix=1):
pixels = np.array(image)
horizontal_matrix = get_famous_horizontal_matrix(famous_matrix)
first_diagonal_matrix = rotate_matrix_with_angle(horizontal_matrix, 3, 45)
vertical_matrix = rotate_matrix_with_angle(first_diagonal_matrix, 3, 45)
second_diagonal_matrix = rotate_matrix_with_angle(vertical_matrix, 3, 45)
horizontal_image = np.zeros((image_height, image_width))
first_diagonal_image = np.zeros((image_height, image_width))
vertical_image = np.zeros((image_height, image_width))
second_diagonal_image = np.zeros((image_height, image_width))
new_image = np.zeros((image_height, image_width))
window_y_center = 1
window_x_center = 1
current_values = np.zeros(4)
for y in range(window_y_center, image_height - window_y_center):
for x in range(window_x_center, image_width - window_x_center):
horizontal_image[y, x] = get_convolution(pixels, x, y,
horizontal_matrix, 3)
first_diagonal_image[y,
x] = get_convolution(pixels, x, y,
first_diagonal_matrix, 3)
vertical_image[y, x] = get_convolution(pixels, x, y,
vertical_matrix, 3)
second_diagonal_image[y,
x] = get_convolution(pixels, x, y,
second_diagonal_matrix,
3)
current_values[0] = horizontal_image[y, x]
current_values[1] = first_diagonal_image[y, x]
current_values[2] = vertical_image[y, x]
current_values[3] = second_diagonal_image[y, x]
new_image[y, x] = np.max(current_values)
save_image(horizontal_image, save_path + "horizontal_image.ppm")
save_image(first_diagonal_image, save_path + "first_diagonal_image.ppm")
save_image(vertical_image, save_path + "vertical_image.ppm")
save_image(second_diagonal_image, save_path + "second_diagonal_image.ppm")
save_image(new_image, save_path + "four_directions_generated_image.ppm")
image_one = Image.fromarray(
lineally_adjust_image_values(horizontal_image, image_width,
image_height))
image_two = Image.fromarray(
lineally_adjust_image_values(first_diagonal_image, image_width,
image_height))
image_three = Image.fromarray(
lineally_adjust_image_values(vertical_image, image_width,
image_height))
image_four = Image.fromarray(
lineally_adjust_image_values(second_diagonal_image, image_width,
image_height))
image_five = Image.fromarray(
lineally_adjust_image_values(new_image, image_width, image_height))
image_one.show()
image_two.show()
image_three.show()
image_four.show()
image_five.show()
def bilateral_filter(image,
image_height,
image_width,
sigma_s,
sigma_r,
window_size,
show_image=True,
load_image=True):
new_image = np.zeros((image_height, image_width))
pixels = image
if load_image:
pixels = np.array(image)
window_y_center = int(window_size / 2)
window_x_center = int(window_size / 2)
for y in range(window_y_center, image_height - window_y_center):
for x in range(window_x_center, image_width - window_x_center):
sliding_window = get_bilateral_window(pixels, window_size, sigma_s,
sigma_r, x, y)
new_image[y, x] = get_convolution(pixels, x, y, sliding_window,
window_size)
if show_image:
save_image(new_image, save_path + "bilateral_filter_image.ppm")
image = Image.fromarray(
lineally_adjust_image_values(new_image, image_width, image_height))
image.show()
return new_image
def gaussian_filter(image,
image_height,
image_width,
sigma,
show_image=True,
unread_image=True,
window=-1):
new_image = np.zeros((image_height, image_width))
window_size = window
if window == -1:
window_size = 2 * sigma + 1
pixels = image
if unread_image:
pixels = np.array(image)
window_y_center = int(window_size / 2)
window_x_center = int(window_size / 2)
sliding_window = get_gaussian_window(window_size, sigma)
for y in range(window_y_center, image_height - window_y_center):
for x in range(window_x_center, image_width - window_x_center):
new_image[y, x] = get_convolution(pixels, x, y, sliding_window,
window_size)
if show_image:
save_image(new_image, save_path + "gaussian_filter_image.ppm")
image = Image.fromarray(
lineally_adjust_image_values(new_image, image_width, image_height))
image.show()
return new_image
def laplacian_gaussian_method(image, image_height, image_width, sigma,
threshold, sinthesis_method):
n = int(6 * sigma + 1)
pixels = np.array(image)
matrix = get_laplacian_gaussian_matrix(n, sigma)
new_image = np.zeros((image_height, image_width))
window_y_center = int(n / 2)
window_x_center = int(n / 2)
for y in range(window_y_center, image_height - window_y_center):
for x in range(window_x_center, image_width - window_x_center):
new_image[y, x] = get_convolution(pixels, x, y, matrix, n)
horizontal_image = horizontal_zero_crossing_with_slope(
new_image, image_height, image_width, threshold)
vertical_image = vertical_zero_crossing_with_slope(new_image, image_height,
image_width, threshold)
if sinthesis_method == "and":
new_image = and_sinthesis(horizontal_image, vertical_image,
image_height, image_width)
elif sinthesis_method == "or":
new_image = or_sinthesis(horizontal_image, vertical_image,
image_height, image_width)
else:
new_image = module_sinthesis(horizontal_image, vertical_image,
image_height, image_width)
save_image(new_image,
save_path + "laplacian_gaussian_generated_with_slope_image.ppm")
image = Image.fromarray(
lineally_adjust_image_values(new_image, image_width, image_height))
image.show()
def border_enhancement_filter(image, image_height, image_width):
new_image = np.zeros((image_height, image_width))
window_size = 3
pixels = np.array(image)
window_y_center = 1
window_x_center = 1
sliding_window = get_border_enhancement_window()
for y in range(window_y_center, image_height - window_y_center):
for x in range(window_x_center, image_width - window_x_center):
new_image[y, x] = get_convolution(pixels, x, y, sliding_window,
window_size)
save_image(new_image, save_path + "border_enhancement_filter_image.ppm")
image = Image.fromarray(
lineally_adjust_image_values(new_image, image_width, image_height))
image.show(
"Border enhancement",
lineally_adjust_image_values(new_image, image_width, image_height))
return new_image
def gaussian_noise_generator(percentage, is_additive, image, image_width,
image_height, mu, sigma):
pixels = image.load()
noise_values = gaussian_generator(mu, sigma, image_height * image_width)
new_image = get_image_with_noise(pixels, image_height, image_width,
noise_values, is_additive, percentage)
save_image(new_image, save_path + "gaussian_noise_image.ppm")
img = Image.fromarray(
lineally_adjust_image_values(new_image, image_width, image_height))
img.show()
return new_image
def rayleigh_noise_generator(percentage, is_additive, image, image_width,
image_height, xi):
pixels = image.load()
noise_values = rayleigh_generator(xi, image_height * image_width)
new_image = get_image_with_noise(pixels, image_height, image_width,
noise_values, is_additive, percentage)
save_image(new_image, save_path + "rayleigh_noise_image.ppm")
img = Image.fromarray(
lineally_adjust_image_values(new_image, image_width, image_height))
img.show()
return new_image
def exponential_noise_generator(percentage, is_additive, image, image_width,
image_height, lambda_value):
pixels = image.load()
noise_values = exponential_generator(lambda_value,
image_height * image_width)
new_image = get_image_with_noise(pixels, image_height, image_width,
noise_values, is_additive, percentage)
save_image(new_image, save_path + "exponential_noise_image.ppm")
img = Image.fromarray(
lineally_adjust_image_values(new_image, image_width, image_height))
img.show()
return new_image
def sobel_detection(image,
image_height,
image_width,
show_images=True,
is_colored=False):
pixels = np.array(image)
if is_colored:
pixels = cv2.cvtColor(pixels, cv2.COLOR_BGR2GRAY)
horizontal_matrix = get_sobel_horizontal_matrix()
horizontal_image = np.zeros((image_height, image_width))
vertical_matrix = get_sobel_vertical_matrix()
vertical_image = np.zeros((image_height, image_width))
new_image = np.zeros((image_height, image_width))
window_y_center = 1
window_x_center = 1
for y in range(window_y_center, image_height - window_y_center):
for x in range(window_x_center, image_width - window_x_center):
horizontal_image[y, x] = get_convolution(pixels, x, y,
horizontal_matrix, 3)
vertical_image[y, x] = get_convolution(pixels, x, y,
vertical_matrix, 3)
new_image[y, x] = sqrt(
pow(horizontal_image[y, x], 2) + pow(vertical_image[y, x], 2))
if show_images:
save_image(horizontal_image, save_path + "sobel_horizontal_image.ppm")
save_image(vertical_image, save_path + "sobel_vertical_image.ppm")
save_image(new_image, save_path + "sobel_generated_image.ppm")
image_one = Image.fromarray(
lineally_adjust_image_values(horizontal_image, image_width,
image_height))
image_two = Image.fromarray(
lineally_adjust_image_values(vertical_image, image_width,
image_height))
image_three = Image.fromarray(
lineally_adjust_image_values(new_image, image_width, image_height))
image_one.show()
image_two.show()
image_three.show()
return [horizontal_image, vertical_image, new_image]
def sift_method(image, image_height, image_width, is_colored=True):
# cv_image = cv2.cvtColor(np.array(image), cv2.COLOR_RGB2BGR)
pixels = np.array(image, dtype=np.uint8)
gray = pixels
if is_colored:
gray = cv2.cvtColor(pixels, cv2.COLOR_BGR2GRAY)
else:
gray = lineally_adjust_image_values(pixels, image_width, image_height)
sift = cv2.xfeatures2d.SIFT_create()
key_points, descriptors = sift.detectAndCompute(gray, None)
# image = cv2.drawKeypoints(gray, key_points, pixels, flags=cv2.DRAW_MATCHES_FLAGS_DRAW_RICH_KEYPOINTS)
# cv2.imwrite(save_path + 'sift_keypoint.jpg', image)
# cv2.imshow('ventana', image)
return [gray, key_points, descriptors]
def median_filter(image, image_height, image_width, window_size):
new_image = np.zeros((image_height, image_width))
pixels = image.load()
window_y_center = int(window_size / 2)
window_x_center = int(window_size / 2)
middle = int(window_size * window_size / 2)
for y in range(window_y_center, image_height - window_y_center):
for x in range(window_x_center, image_width - window_x_center):
new_image[y, x] = get_median_window(pixels, x, y,
window_size)[middle]
save_image(new_image, save_path + "median_filter_image.ppm")
image = Image.fromarray(
lineally_adjust_image_values(new_image, image_width, image_height))
image.show()
return new_image
def weighted_median_filter(image, image_height, image_width, window_size):
new_image = np.zeros((image_height, image_width))
pixels = image.load()
window_y_center = 1
window_x_center = 1
sliding_window = get_weighted_median_window()
for y in range(window_y_center, image_height - window_y_center):
for x in range(window_x_center, image_width - window_x_center):
new_image[y,
x] = get_weighted_median_value(pixels, x, y, window_size,
sliding_window)
save_image(new_image, save_path + "weighted_median_filter_image.ppm")
image = Image.fromarray(
lineally_adjust_image_values(new_image, image_width, image_height))
image.show()
return new_image
def media_filter(image, image_height, image_width, window_size):
if window_size % 2 == 0:
window_size = window_size + 1
new_image = np.zeros((image_height, image_width))
pixels = np.array(image)
sliding_window = generate_media_window(window_size)
window_y_center = int(window_size / 2)
window_x_center = int(window_size / 2)
for y in range(window_y_center, image_height - window_y_center):
for x in range(window_x_center, image_width - window_x_center):
new_image[y, x] = get_convolution(pixels, x, y, sliding_window,
window_size)
save_image(new_image, save_path + "media_filter_image.ppm")
image = Image.fromarray(
lineally_adjust_image_values(new_image, image_width, image_height))
image.show()
return new_image
def isotropic_diffusion_filter(image, image_height, image_width, t_max):
new_image = np.zeros((image_height, image_width))
window_size = 3
pixels = np.array(image)
window_y_center = int(window_size / 2)
window_x_center = int(window_size / 2)
for t in range(0, t_max):
for y in range(window_y_center, image_height - window_y_center):
for x in range(window_x_center, image_width - window_x_center):
new_image[y, x] = get_diffusion_value(pixels, x, y, 1, False,
False)
pixels = new_image
save_image(new_image, save_path + "isotropic_diffusion.ppm")
image = Image.fromarray(
lineally_adjust_image_values(new_image, image_width, image_height))
image.show()
return new_image
def canny_method(image,
image_height,
image_width,
sigma_s,
sigma_r,
window_size,
four_neighbours=True,
show_image=True,
load_image=True):
filtered_image = bilateral_filter(image, image_height, image_width,
sigma_s, sigma_r, window_size, False,
load_image)
images = sobel_detection(filtered_image, image_height, image_width, False)
horizontal_image = images[0]
vertical_image = images[1]
synthesized_image = images[2]
# synthesized_image = normalize(synthesized_image, image_height, image_width)
angle_matrix = get_angle_matrix(horizontal_image, vertical_image,
image_height, image_width)
suppressed_image = suppress_false_maximums(synthesized_image, angle_matrix,
image_height, image_width)
# threshold = threshold_multiotsu(suppressed_image)
# low_threshold = threshold[0]
high_threshold = np.amax(suppressed_image) * 0.14
low_threshold = np.amax(suppressed_image) * 0.06
# high_threshold = low_threshold + 50
umbralized_image = umbralization_with_two_thresholds(
suppressed_image, image_height, image_width, high_threshold,
low_threshold)
border_image = hysteresis(umbralized_image, image_height, image_width,
four_neighbours)
if show_image:
save_image(border_image, save_path + "canny_generated_image.ppm")
image = Image.fromarray(
lineally_adjust_image_values(border_image, image_width,
image_height))
image.show()
return border_image