def square(self, image):
""" SQURE FUNCTION """
height = image.shape[0]
width = image.shape[1]
white = [255, 255, 255]
if height != width:
if height > width:
dif = height - width
squared = cv2.copyMakeBorder(image,
0,
0,
int(dif / 2),
int(dif / 2),
cv2.BORDER_CONSTANT,
value=white)
# print(squared.shape)
return squared
else:
dif = width - height
squared = cv2.copyMakeBorder(image,
int(dif / 2),
int(dif / 2),
0,
0,
cv2.BORDER_CONSTANT,
value=white)
# print(squared.shape)
return squared
else:
return image
def resize_frame(img, frame_height, frame_width):
prop_size = "" # proper size, indicates whether to keep the measurement of fixed height or width to recalculate the other
height, width = img.shape[:2]
if height > width:
new_height = frame_height
new_width = width * frame_height / height
prop_size = "h"
if new_width > frame_width:
height = new_height
width = new_width
new_width = frame_width
new_height = height * frame_width / width
prop_size = "w"
elif width > height:
new_width = frame_width
new_height = height * frame_width / width
prop_size = "w"
if new_height > frame_height:
height = new_height
width = new_width
new_height = frame_height
new_width = width * frame_height / height
prop_size = "h"
img_r = cv2.resize(img, (int(new_width), int(new_height)),
interpolation=cv2.INTER_AREA)
if prop_size == "h":
dim_bordo = frame_width - img_r.shape[1]
frame = cv2.copyMakeBorder(img_r,
top=0,
bottom=0,
left=int(dim_bordo / 2),
right=int(dim_bordo / 2),
borderType=cv2.BORDER_CONSTANT,
value=[0, 0, 0])
elif prop_size == "w":
dim_bordo = frame_height - img_r.shape[0]
frame = cv2.copyMakeBorder(img_r,
top=int(dim_bordo / 2),
bottom=int(dim_bordo / 2),
left=0,
right=0,
borderType=cv2.BORDER_CONSTANT,
value=[0, 0, 0])
# in case the frame with border have sizes different from those desired caused by roundings to int (some pixels), is resized to the exact size
if frame.shape[0] != frame_height or frame.shape[1] != frame_width:
frame = cv2.resize(frame, (frame_width, frame_height),
interpolation=cv2.INTER_AREA)
return frame
def ridimensiona(img, frame_height, frame_width):
dim_esatta = "" # "a" se alt=frame_height "l" altrimenti
alt, larg = img.shape[:2]
if alt > larg:
nuova_alt = frame_height
nuova_larg = larg * frame_height / alt
dim_esatta = "a"
if nuova_larg > frame_width:
alt = nuova_alt
larg = nuova_larg
nuova_larg = frame_width
nuova_alt = alt * frame_width / larg
dim_esatta = "l"
elif larg > alt:
nuova_larg = frame_width
nuova_alt = alt * frame_width / larg
dim_esatta = "l"
if nuova_alt > frame_height:
alt = nuova_alt
larg = nuova_larg
nuova_alt = frame_height
nuova_larg = larg * frame_height / alt
dim_esatta = "a"
img_r = cv2.resize(img, (int(nuova_larg), int(nuova_alt)),
interpolation=cv2.INTER_AREA)
if dim_esatta == "a":
dim_bordo = frame_width - img_r.shape[1]
frame = cv2.copyMakeBorder(img_r,
top=0,
bottom=0,
left=int(dim_bordo / 2),
right=int(dim_bordo / 2),
borderType=cv2.BORDER_CONSTANT,
value=[0, 0, 0])
elif dim_esatta == "l":
dim_bordo = frame_height - img_r.shape[0]
frame = cv2.copyMakeBorder(img_r,
top=int(dim_bordo / 2),
bottom=int(dim_bordo / 2),
left=0,
right=0,
borderType=cv2.BORDER_CONSTANT,
value=[0, 0, 0])
# Nel caso in cui il frame con il bordo ha dimensioni diverse dovute ad arrotondamenti ad int, viene ridimensionato con le dimensioni esatte
if frame.shape[0] != frame_height or frame.shape[1] != frame_width:
frame = cv2.resize(frame, (frame_width, frame_height),
interpolation=cv2.INTER_AREA)
return frame
def resize_image(image, height=IMAGE_SIZE, width=IMAGE_SIZE):
top, bottom, left, right = (0, 0, 0, 0)
#獲取影象尺寸
h, w, _ = image.shape
#對於長寬不相等的圖片，找到最長的一邊
longest_edge = max(h, w)
#計算短邊需要增加多上畫素寬度使其與長邊等長
if h < longest_edge:
dh = longest_edge - h
top = dh // 2
bottom = dh - top
elif w < longest_edge:
dw = longest_edge - w
left = dw // 2
right = dw - left
else:
pass
#RGB顏色
BLACK = [0, 0, 0]
#給影象增加邊界，是圖片長、寬等長，cv2.BORDER_CONSTANT指定邊界顏色由value指定
constant = cv2.copyMakeBorder(image,
top,
bottom,
left,
right,
cv2.BORDER_CONSTANT,
value=BLACK)
#調整影象大小並返回
return cv2.resize(constant, (height, width))
def resize_keep_aspectratio(image_src, dst_size):
src_h, src_w = image_src.shape[:2]
#print(src_h,src_w)
dst_h, dst_w = dst_size
#判断应该按哪个边做等比缩放
h = dst_w * (float(src_h) / src_w) #按照ｗ做等比缩放
w = dst_h * (float(src_w) / src_h) #按照h做等比缩放
h = int(h)
w = int(w)
if h <= dst_h:
image_dst = cv2.resize(image_src, (dst_w, int(h)))
else:
image_dst = cv2.resize(image_src, (int(w), dst_h))
h_, w_ = image_dst.shape[:2]
#print(h_,w_)
top = int(((dst_h - h_) / 2) + 10)
down = int(((dst_h - h_ + 1) / 2) + 10)
left = int(((dst_w - w_) / 2) + 10)
right = int(((dst_w - w_ + 1) / 2) + 10)
value = [255, 255, 255]
borderType = cv2.BORDER_CONSTANT
#print(top, down, left, right)
image_dst = cv2.copyMakeBorder(image_dst, top, down, left, right,
borderType, None, value)
return image_dst
def createPano(hMat, imOrder, imgRGB):
limits = np.zeros((len(images), 4))
for i in range(0, len(images) - 1):
limits[i] = outputLimits(hMat[i + 1], imgRGB[imOrder[i]].shape[:2],
imgRGB[imOrder[i + 1]].shape[:2])
xmin = round(np.min(limits[:, 0]))
xmax = round(np.max(limits[:, 1]))
ymin = round(np.min(limits[:, 2]))
ymax = round(np.max(limits[:, 3]))
pano = imgRGB[imOrder[0]]
pad_widths = [
-ymin,
max(ymax, pano.shape[0]) - pano.shape[0], -xmin,
max(xmax, pano.shape[1]) - pano.shape[1]
]
pano_pad = cv2.copyMakeBorder(pano, *pad_widths, cv2.BORDER_CONSTANT)
t = [-ymin, -xmin]
for i in range(1, len(hMat)):
pano_pad = warp2Images(pano_pad, imgRGB[imOrder[i]], hMat[i], t)
cv2.imshow(' ', pano_pad)
cv2.waitKey(0)
cv2.destroyAllWindows()
return pano_pad
def resize_and_pad(image, size_w, size_h, pad_value=114):
image_h, image_w = image.shape[:2]
is_based_w = float(size_h) >= (image_h * size_w / float(image_w))
if is_based_w:
target_w = size_w
target_h = int(np.round(image_h * size_w / float(image_w)))
else:
target_w = int(np.round(image_w * size_h / float(image_h)))
target_h = size_h
image = cv.resize(image, (target_w, target_h),
0,
0,
interpolation=cv.INTER_NEAREST)
#image = cv.resize(image, (target_w, target_h), 0, 0, interpolation=cv.INTER_LINEAR)
top = int(max(0, np.round((size_h - target_h) / 2)))
left = int(max(0, np.round((size_w - target_w) / 2)))
bottom = size_h - top - target_h
right = size_w - left - target_w
image = cv.copyMakeBorder(image,
top,
bottom,
left,
right,
cv.BORDER_CONSTANT,
value=[pad_value, pad_value, pad_value])
return image
def letterbox_image(image, desired_size):
"""resize image with unchanged aspect ratio using padding (width, height)"""
ih, iw = image.shape[:2]
w, h = desired_size
scale = min(w / iw, h / ih)
nw = int(iw * scale)
nh = int(ih * scale)
resized_image = cv2.resize(image, (nw, nh))
delta_w = w - nw
delta_h = h - nh
top, bottom = delta_h // 2, delta_h - (delta_h // 2)
left, right = delta_w // 2, delta_w - (delta_w // 2)
color = [128, 128, 128]
new_image = cv2.copyMakeBorder(resized_image,
top,
bottom,
left,
right,
cv2.BORDER_CONSTANT,
value=color)
return new_image
def scale_and_centre(img, size, margin=20, background=0):
"""Scales and centres an image onto a new background square."""
h, w = img.shape[:2]
def centre_pad(length):
"""Handles centering for a given length that may be odd or even."""
if length % 2 == 0:
side1 = int((size - length) / 2)
side2 = side1
else:
side1 = int((size - length) / 2)
side2 = side1 + 1
return side1, side2
def scale(r, x):
return int(r * x)
if h > w:
t_pad = int(margin / 2)
b_pad = t_pad
ratio = (size - margin) / h
w, h = scale(ratio, w), scale(ratio, h)
l_pad, r_pad = centre_pad(w)
else:
l_pad = int(margin / 2)
r_pad = l_pad
ratio = (size - margin) / w
w, h = scale(ratio, w), scale(ratio, h)
t_pad, b_pad = centre_pad(h)
img = cv2.resize(img, (w, h))
img = cv2.copyMakeBorder(img, t_pad, b_pad, l_pad, r_pad,
cv2.BORDER_CONSTANT, None, background)
return cv2.resize(img, (size, size))
def letterbox(img, new_shape=(640, 640), color=(114, 114, 114), auto=True, scaleFill=False, scaleup=True):
# Resize image to a 32-pixel-multiple rectangle https://github.com/ultralytics/yolov3/issues/232
shape = img.shape[:2] # current shape [height, width]
if isinstance(new_shape, int):
new_shape = (new_shape, new_shape)
# Scale ratio (new / old)
r = min(new_shape[0] / shape[0], new_shape[1] / shape[1])
if not scaleup: # only scale down, do not scale up (for better test mAP)
r = min(r, 1.0)
# Compute padding
ratio = r, r # width, height ratios
new_unpad = int(round(shape[1] * r)), int(round(shape[0] * r))
dw, dh = new_shape[1] - new_unpad[0], new_shape[0] - new_unpad[1] # wh padding
if auto: # minimum rectangle
dw, dh = np.mod(dw, 32), np.mod(dh, 32) # wh padding
elif scaleFill: # stretch
dw, dh = 0.0, 0.0
new_unpad = (new_shape[1], new_shape[0])
ratio = new_shape[1] / shape[1], new_shape[0] / shape[0] # width, height ratios
dw /= 2 # divide padding into 2 sides
dh /= 2
if shape[::-1] != new_unpad: # resize
img = cv2.resize(img, new_unpad, interpolation=cv2.INTER_LINEAR)
top, bottom = int(round(dh - 0.1)), int(round(dh + 0.1))
left, right = int(round(dw - 0.1)), int(round(dw + 0.1))
img = cv2.copyMakeBorder(img, top, bottom, left, right, cv2.BORDER_CONSTANT, value=color) # add border
return img, ratio, (dw, dh)
def showIfWindows(model, images, orig_labels):
if platform.system() == "Windows":
# 3 images shown randomly
randomIndices = np.random.choice(len(y_train), 5)
for i in randomIndices:
rand_im = images[i]
rand_im_lbl_orig = orig_labels[i]
rand_im_lbl_pred = model.predict(np.array([rand_im * 255]))
rand_im = cv2.copyMakeBorder(rand_im, 200, 200, 200, 200,
cv2.BORDER_CONSTANT, 0)
# print(f"Y: {rand_im_lbl_orig}, Y_pred: {rand_im_lbl_pred}")
cv2.putText(
rand_im,
f"Y: {rand_im_lbl_orig}, Y_pred: {[np.where(r==1)[0][0] for r in rand_im_lbl_pred]}",
(5, 100),
cv2.FONT_HERSHEY_SIMPLEX,
1,
(255, 0, 0),
2,
cv2.LINE_AA,
)
cv2.imshow("Sample", rand_im)
cv2.waitKey(0)
cv2.destroyAllWindows()
else:
printInColor("Showing Images only works on OS with GUI")
def resize_to_fit(img: object, new_size: int) -> object:
"""Resizes the image to new squared dimension (dim: new_size) keeping the
proportions and padding with black pixels"""
# shape retorna (h, w)
ratio = new_size / (max(img.shape[:2]))
new_shape = tuple([int(ratio * size) for size in img.shape[:2]])
# Realizando o resize na proporção calculada. Resize usa (w,h)
new_img = cv2.resize(img, (new_shape[1], new_shape[0]))
# Ajustando o pad para cada uma das dimensões (w e h)
total_padw = new_size - new_img.shape[1]
pad_right = total_padw // 2
pad_left = total_padw - pad_right
total_padh = new_size - new_img.shape[0]
pad_top = total_padh // 2
pad_bottom = total_padh - pad_top
new_img = cv2.copyMakeBorder(
new_img, pad_top, pad_bottom, pad_left, pad_right, cv2.BORDER_CONSTANT
)
return new_img
def render(self):
# 拉伸图片到窗口宽度，同时保持宽高比
# 注意：处理之前的高、宽对应原图像素，if-else语句之后对应屏幕像素
height, width = self.display_area.height, self.display_area.width
if height / width > self.win_h / self.win_w:
height, width = self.win_h, int(self.win_h * width / height)
else:
height, width = int(self.win_w * height / width), self.win_w
# 显示区域
display = np.array(self.img)
scaled = cv2.resize(display[self.display_area], (width, height),
interpolation=cv2.INTER_NEAREST)
# 用边框将图片充满窗口
top = (self.win_h - height) // 2
bot = self.win_h - height - top
left = (self.win_w - width) // 2
right = self.win_w - width - left
self.display = cv2.copyMakeBorder(scaled, top, bot, left, right,
cv2.BORDER_CONSTANT, (0, 0, 0))
# 为了将鼠标点击投影回原图位置的变量
self.scaled_size = Area.AreaTuple(height, width)
self.top_border = top
self.left_border = left
def Prewitt(originImg, rows, columns, threshold, mask_1, mask_2):
image = np.zeros(originImg.shape, np.uint8)
imageBordered = cv2.copyMakeBorder(originImg, 1, 1, 1, 1,
cv2.BORDER_REFLECT)
maskRows = len(mask_1)
maskColumns = len(mask_1[0])
for r in range(rows):
for c in range(columns):
p1, p2 = 0, 0
for maskR in range(maskRows):
for maskC in range(maskColumns):
p1 += int(imageBordered[r + maskR - 1, c + maskC -
1]) * mask_1[maskR][maskC]
p2 += int(imageBordered[r + maskR - 1, c + maskC -
1]) * mask_2[maskR][maskC]
gradient = math.sqrt(p1**2 + p2**2)
if gradient >= threshold:
image[r, c] = 0
else:
image[r, c] = 255
cv2.imshow("Prewitt", image)
cv2.waitKey(0)
cv2.destroyAllWindows()
return image
def img_stitch():
# Used for image stitching: grab the paths to the input images and initialize our images list
imgPaths = sorted(list(paths.list_images(this_path + "imgToStitch")))
imgs = []
# loop over the image paths, load each one, and add them to our
# images to stitch list
for imgPath in imgPaths:
img = cv2.imread(imgPath)
imgs.append(img)
# initialize OpenCV's image stitcher object and then perform the image
# stitching
stitcher = cv2.createStitcher() if imutils.is_cv3() else cv2.Stitcher_create()
(status, stitched) = stitcher.stitch(imgs)
# if the status is '0', then OpenCV successfully performed image
# stitching
if status == 0:
# create a 10 pixel border surrounding the stitched image
stitched = cv2.copyMakeBorder(stitched, 10, 10, 10, 10,
cv2.BORDER_CONSTANT, (0, 0, 0))
# get number of images already in the ./stitchUnlabel directory
imgCount = len([name for name in os.listdir(this_path + 'stitchUnlabel') if os.path.isfile(os.path.join(this_path + 'stitchUnlabel', name))]) - 1
# write the output stitched image to disk (adding 1 to imgCount bc first image is gsv1 not gsv0)
cv2.imwrite(this_path + 'stitchUnlabel' + '/gsv'+ str(imgCount+1) + '.jpg', stitched)
# otherwise the stitching failed, likely due to not enough keypoints)
# being detected
else:
print("[INFO] image stitching failed ({})".format(status))
def compass(originImg, rows, columns, threshold, mask):
image = np.zeros(originImg.shape, np.uint8)
borderImg = cv2.copyMakeBorder(originImg, 1, 1, 1, 1, cv2.BORDER_REFLECT)
for r in range(rows):
for c in range(columns):
imageList = [
borderImg[r - 1, c - 1], borderImg[r - 1, c],
borderImg[r - 1, c + 1], borderImg[r, c + 1], borderImg[r + 1,
c + 1],
borderImg[r + 1, c], borderImg[r + 1, c - 1], borderImg[r,
c - 1]
]
maxK = 0
for offset in range(8):
tempSum = 0
for num in range(8):
tempSum += imageList[num] * mask[(num + offset) % 8]
if tempSum > maxK:
maxK = tempSum
if maxK >= threshold:
image[r, c] = 0
else:
image[r, c] = 255
cv2.imshow("Compass", image)
cv2.waitKey(0)
cv2.destroyAllWindows()
return image
def extract_section_coordinates_from_image(self, image,
threshold_breakpoint):
# Takes an raw image with a white bright background and looks for the contour of
# a rectangular object and returns the coordinates representing a polygon shape of that object.
# A threshold needs to be provided representing an acceptable breaking point at which the coordinates will be returned
# The width of the border to wrap the image in case the object overflows the image
BORDER_WIDTH = 100
image = cv2.copyMakeBorder(image,
BORDER_WIDTH,
BORDER_WIDTH,
BORDER_WIDTH,
BORDER_WIDTH,
cv2.BORDER_CONSTANT,
value=[255, 255, 255])
image_grayscale = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
# Calculate the image area
image_height, image_width = image.shape[:2]
image_area = image_height * image_width
# Repeat to find the right threshold value for finding a rectangle
found = False
# Increment the threshold until a contour is found
threshold_current = threshold_breakpoint
while found is False:
if threshold_breakpoint < 200:
threshold_breakpoint = threshold_current + 5
threshold_current = threshold_breakpoint
# Extract contours using threshold
_, threshold = cv2.threshold(image_grayscale, threshold_breakpoint,
255, cv2.THRESH_BINARY)
contours, _ = cv2.findContours(threshold, cv2.RETR_LIST,
cv2.CHAIN_APPROX_NONE)
# Go through each contour that could be extracted from the image
for contour in contours:
contour_area = cv2.contourArea(contour)
if contour_area > (image_area /
6) and contour_area < (image_area / 1.01):
epsilon = 0.1 * cv2.arcLength(contour, True)
# Close open lines into a complete wrapped shade
approx = cv2.approxPolyDP(contour, epsilon, True)
# When the shape can be wrapped the contour rectangle has been found
if len(approx) == 4:
found = True
# Otherwise keep decrementing the threshold value until it's found
else:
threshold_breakpoint = threshold_breakpoint - 1
break
# Set and return coordinates from approximate
coordinates = numpy.empty((4, 2), dtype="float32")
# Top-left
coordinates[0] = approx[0] - BORDER_WIDTH
# Top-right
coordinates[1] = approx[1] - BORDER_WIDTH
# Bottom-right
coordinates[2] = approx[2] - BORDER_WIDTH
# Bottom-left
coordinates[3] = approx[3] - BORDER_WIDTH
return coordinates
def pad_image(image):
(h, w) = image.shape[:2]
padW = int((140 - w) / 2.0)
padH = int((140 - h) / 2.0)
image = cv2.copyMakeBorder(image, padH, padH, padW, padW,
cv2.BORDER_CONSTANT)
image = cv2.resize(image, (140, 140))
return image
def add_borders(img):
borderType = cv.BORDER_CONSTANT
dst = cv.copyMakeBorder(img,
BBOX_WIDTH,
BBOX_WIDTH,
BBOX_WIDTH,
BBOX_WIDTH,
borderType,
value=BBOX_COLOR)
return dst
def draw_box_with_text(img,
text=None,
edge_color=(255, 255, 255),
border=2,
mode=0):
"""
draws box around
"""
# width, height = img.shape[1::-1]
# scale = max(width, height) / 400
font_scale, font_thickness = .8, 2
font_color = (0, 0, 0)
if mode == 0: # standard mode
img = cv2.copyMakeBorder(img,
10 * border,
border,
border,
border,
cv2.BORDER_CONSTANT,
value=edge_color)
elif mode == 1: # low vision
img = cv2.copyMakeBorder(img,
10 * border,
border,
border,
border,
cv2.BORDER_CONSTANT,
value=edge_color)
font_scale, font_thickness = 1.6, 2
if text is not None:
x = y = border
img = cv2.putText(img,
text, (x + 2, y + 15),
cv2.FONT_HERSHEY_SIMPLEX,
font_scale,
font_color,
font_thickness,
lineType=cv2.LINE_AA)
return img
def _apply_func_perspective(image):
"""
Apply a perspective to an image
"""
rgb_image = image.convert('RGBA')
img_arr = np.array(rgb_image)
a = img_arr
w, h = a.shape[0], a.shape[1]
if h // w > 3:
img = cv2.cvtColor(np.asarray(image), cv2.COLOR_RGBA2BGRA)
img = cv2.copyMakeBorder(img,
20,
20,
0,
0,
cv2.BORDER_CONSTANT,
value=[255, 255, 255])
#img = cv2.imread(img)
img = Image.fromarray(cv2.cvtColor(img, cv2.COLOR_BGRA2RGBA))
img = img.resize((48, 48), Image.ANTIALIAS)
return img
'''
Set random vertex to target quadrilateral
'''
random_flag = random.uniform(0, 2)
if random_flag > 1:
vertex1 = [0, 0]
vertex4 = [random.uniform(1.0000, 1.1618) * (w - 1), 0]
lens = vertex4[0] - vertex1[0]
vertex2 = [random.uniform(0.1, 0.1618) * (w - 1), h - 1]
vertex3 = [vertex2[0] + lens * random.uniform(0.932, 1), h - 1]
else:
vertex4 = [(w - 1) * random.uniform(1.0000, 1.1618), 0]
vertex1 = [random.uniform(0.1000, 0.2618) * (w - 1), 0]
lens = vertex4[0] - vertex1[0]
vertex2 = [random.uniform(0.0000, 0.0618) * (w - 1), h - 1]
vertex3 = [vertex2[0] + lens * random.uniform(0.932, 1), h - 1]
pts = np.float32([[0, 0], [0, h - 1], [w - 1, h - 1], [w - 1, 0]])
pts1 = np.float32([vertex1, vertex2, vertex3, vertex4])
'''
get 3*3 transform martix M
'''
M = cv2.getPerspectiveTransform(pts, pts1)
dsize = get_perspective_offset(M, w, h)
dst = cv2.warpPerspective(a, M, dsize)
img_arr = np.array(dst)
img = Image.fromarray(np.uint8(img_arr))
img = img.resize((48, 48), Image.ANTIALIAS)
return img
def __init__(self, global_grid, agent_handler):
self._no_of_agents = Config.NO_OF_AGENTS
self._grid_len = Config.GRID_LEN
self._grid_width = Config.GRID_WIDTH
self._sensor_range = Config.SENSOR_RANGE
self._agent_color_list = agent_handler.get_all_agent_color_list()
self._global_grid = copy.copy(global_grid)
self._mapped_grid = 224 * np.ones(
shape=[self._grid_len, self._grid_width, 3], dtype=np.uint8)
self._mapped_grid = cv2.copyMakeBorder(self._mapped_grid, 10, 10, 10,
10, cv2.BORDER_CONSTANT)
def get_highlighted_image(self, target_width: int = None) -> np.ndarray:
return cv2.copyMakeBorder(
(self.get_resized_image(target_width) if target_width is not None
else self.get_data())[self.BORDER_WIDTH:-self.BORDER_WIDTH,
self.BORDER_WIDTH:-self.BORDER_WIDTH, ],
top=self.BORDER_WIDTH,
bottom=self.BORDER_WIDTH,
left=self.BORDER_WIDTH,
right=self.BORDER_WIDTH,
borderType=cv2.BORDER_ISOLATED,
value=self.BORDER_COLOR,
)
def draw_class(self, image, class_name):
height, width = image.shape[:2]
bordered = cv2.copyMakeBorder(image,
top=0,
bottom=50,
left=0,
right=0,
borderType=cv2.BORDER_CONSTANT,
value=[245, 222, 179])
cv2.putText(bordered, class_name, (2, height + 30),
cv2.FONT_HERSHEY_SIMPLEX, 0.7, (0, 0, 0), 2)
return bordered
def readData(path, h,w,imgs,labs):
for filename in os.listdir(path):
if filename.endswith('.jpg'):
filename = path + '/' + filename
img = cv2.imread(filename)
# cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
top,bottom,left,right = getPaddingSize(img)
# 将图片放大， 扩充图片边缘部分
img = cv2.copyMakeBorder(img, top, bottom, left, right, cv2.BORDER_CONSTANT, value=[0,0,0])
img = cv2.resize(img, (h, w))
imgs.append(img)
labs.append(path)
return imgs,labs
def morphEx(img, morph_type, ksize):
bsize = ksize // 2
bordered = cv2.copyMakeBorder(img,
bsize,
bsize,
bsize,
bsize,
borderType=cv2.BORDER_CONSTANT,
value=0)
kernel = np.ones((ksize, ) * 2, np.uint8)
filtered = cv2.morphologyEx(bordered, morph_type, kernel, borderValue=0)
result = filtered[bsize:-bsize, bsize:-bsize]
assert result.shape == img.shape, (result.shape, img.shape)
return result
def filter_image(im, filter):
im_f = np.zeros((np.size(im, 1), np.size(im, 0)))
#padding
im_temp = cv2.copyMakeBorder(im,
top=1,
bottom=1,
left=1,
right=1,
borderType=cv2.BORDER_REPLICATE)
#
for i in range(0, np.size(im, 0) - 3):
for j in range(0, np.size(im, 1) - 3): #x-direction
#w=im_temp[j:j+3,i:i+3]
#o=np.multiply(im_temp[j:3,i:3],filter)
im_f[j, i] = np.sum(np.multiply(im_temp[j:j + 3, i:i + 3], filter))
return im_f
def NevatiaBabu(originImg, rows, columns, threshold, mask_1, mask_2):
image = np.zeros(originImg.shape, np.uint8)
borderImg = cv2.copyMakeBorder(originImg, 2, 2, 2, 2, cv2.BORDER_REPLICATE)
mask_3 = arrayClockwise(mask_1)
mask_4 = arrayClockwise(mask_2)
mask_6 = arrayFlip(mask_4)
mask_5 = arrayClockwise(mask_6)
for r in range(rows):
for c in range(columns):
maxK = 0
for num in range(6):
tempsum = 0
for maskN in range(len(mask_1)):
for maskC in range(len(mask_1[0])):
if num == 0:
tempsum += int(borderImg[r + maskN - 2, c + maskC -
2]) * mask_1[maskN, maskC]
elif num == 1:
tempsum += int(borderImg[r + maskN - 2, c + maskC -
2]) * mask_2[maskN, maskC]
elif num == 2:
tempsum += int(borderImg[r + maskN - 2, c + maskC -
2]) * mask_6[maskN, maskC]
elif num == 3:
tempsum += int(borderImg[r + maskN - 2, c + maskC -
2]) * mask_3[maskN, maskC]
elif num == 4:
tempsum += int(borderImg[r + maskN - 2, c + maskC -
2]) * mask_4[maskN, maskC]
elif num == 5:
tempsum += int(borderImg[r + maskN - 2, c + maskC -
2]) * mask_5[maskN, maskC]
if tempsum > maxK:
maxK = tempsum
if maxK >= threshold:
image[r, c] = 0
else:
image[r, c] = 255
cv2.imshow("NevatiaBabu", image)
cv2.waitKey(0)
cv2.destroyAllWindows()
return image
def resize_img(im):
old_size = im.shape[:2] # old_size is in (height, width) format
ratio = float(img_size) / max(old_size)
new_size = tuple([int(x * ratio) for x in old_size])
# new_size should be in (width, height) format
im = cv2.resize(im, (new_size[1], new_size[0]))
delta_w = img_size - new_size[1]
delta_h = img_size - new_size[0]
top, bottom = delta_h // 2, delta_h - (delta_h // 2)
left, right = delta_w // 2, delta_w - (delta_w // 2)
new_im = cv2.copyMakeBorder(im,
top,
bottom,
left,
right,
cv2.BORDER_CONSTANT,
value=[0, 0, 0])
return new_im, ratio, top, left
def resize_image(image, size=config.image_size[0]):
# 缩放比例
scale = 0.0
w_s = 0.0 # 宽度偏移
h_s = 0.0 # 高度偏移
# 获取图片尺寸
h, w, _ = image.shape
if h > w:
scale = h / size
w_s = (size - (w / scale)) / 2
else:
scale = w / size
h_s = (size - (h / scale)) / 2
top, bottom, left, right = (0, 0, 0, 0)
# 对于长宽不等的图片，找到最长的一边
longest_edge = max(h, w)
# 计算短边需要增加多少像素宽度才能与长边等长(相当于padding，长边的padding为0，短边才会有padding)
if h < longest_edge:
dh = longest_edge - h
top = dh // 2
bottom = dh - top
elif w < longest_edge:
dw = longest_edge - w
left = dw // 2
right = dw - left
else:
pass # pass是空语句，是为了保持程序结构的完整性。pass不做任何事情，一般用做占位语句。
# RGB颜色
BLACK = [128, 128, 128]
# 给图片增加padding，使图片长、宽相等
# top, bottom, left, right分别是各个边界的宽度，cv2.BORDER_CONSTANT是一种border type，表示用相同的颜色填充
constant = cv.copyMakeBorder(image,
top,
bottom,
left,
right,
cv.BORDER_CONSTANT,
value=BLACK)
# 调整图像大小并返回图像，目的是减少计算量和内存占用，提升训练速度
return cv.resize(constant, (size, size)), scale, w_s, h_s
