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import cv2 |
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import numpy as np |
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def draw_bbox(image,box,color=(255,0,0),thickness=1): |
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if thickness==0: |
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return |
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left = int(box[0]) |
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top = int(box[1]) |
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right = int(box[0]+box[2]) |
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bottom = int(box[1]+box[3]) |
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box_points =[(left,top),(right,top),(right,bottom),(left,bottom)] |
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cv2.polylines(image, [np.array(box_points)], isClosed=True, color=color, thickness=thickness) |
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def to_int_points(points): |
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int_points=[] |
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for point in points: |
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int_points.append([int(point[0]),int(point[1])]) |
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return int_points |
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def draw_text(img, text, point, font_scale=0.5, color=(200, 200, 200), thickness=1): |
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font = cv2.FONT_HERSHEY_SIMPLEX |
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cv2.putText(img, str(text), point, font, font_scale, color, thickness, cv2.LINE_AA) |
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plot_text_color = (200, 200, 200) |
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plot_text_font_scale = 0.5 |
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plot_index = 1 |
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plot_text = True |
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def set_plot_text(is_plot,text_font_scale,text_color): |
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global plot_index,plot_text,plot_text_font_scale,plot_text_color |
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plot_text = is_plot |
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plot_index = 1 |
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plot_text_font_scale = text_font_scale |
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plot_text_color = text_color |
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def plot_points(image,points,isClosed=False,circle_size=3,circle_color=(255,0,0),line_size=1,line_color=(0,0,255)): |
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global plot_index,plot_text |
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int_points = to_int_points(points) |
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if circle_size>0: |
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for point in int_points: |
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cv2.circle(image,point,circle_size,circle_color,-1) |
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if plot_text: |
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draw_text(image,plot_index,point,plot_text_font_scale,plot_text_color) |
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plot_index+=1 |
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if line_size>0: |
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cv2.polylines(image, [np.array(int_points)], isClosed=isClosed, color=line_color, thickness=line_size) |
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def fill_points(image,points,thickness=1,line_color=(255,255,255),fill_color = (255,255,255)): |
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np_points = np.array(points,dtype=np.int32) |
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cv2.fillPoly(image, [np_points], fill_color) |
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cv2.polylines(image, [np_points], isClosed=True, color=line_color, thickness=thickness) |
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def get_image_size(cv2_image): |
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return cv2_image.shape[:2] |
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def get_channel(np_array): |
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return np_array.shape[2] if np_array.ndim == 3 else 1 |
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def get_numpy_text(np_array,key=""): |
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channel = get_channel(np_array) |
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return f"{key} shape = {np_array.shape} channel = {channel} ndim = {np_array.ndim} size = {np_array.size}" |
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def gray3d_to_2d(grayscale: np.ndarray) -> np.ndarray: |
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channel = get_channel(grayscale) |
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if channel!=1: |
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raise ValueError(f"color maybe rgb or rgba {get_numpy_text(grayscale)}") |
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""" |
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3 次元グレースケール画像 (チャンネル数 1) を 2 次元に変換する。 |
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Args: |
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grayscale (np.ndarray): 3 次元グレースケール画像 (チャンネル数 1)。 |
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Returns: |
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np.ndarray: 2 次元グレースケール画像。 |
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""" |
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if grayscale.ndim == 2: |
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return grayscale |
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return np.squeeze(grayscale) |
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def blend_rgb_images(image1: np.ndarray, image2: np.ndarray, mask: np.ndarray) -> np.ndarray: |
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""" |
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2 つの RGB 画像をマスク画像を使用してブレンドする。 |
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Args: |
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image1 (np.ndarray): 最初の画像 (RGB)。 |
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image2 (np.ndarray): 2 番目の画像 (RGB)。 |
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mask (np.ndarray): マスク画像 (グレースケール)。 |
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Returns: |
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np.ndarray: ブレンドされた画像 (RGB)。 |
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Raises: |
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ValueError: 入力画像の形状が一致しない場合。 |
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""" |
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if image1.shape != image2.shape or image1.shape[:2] != mask.shape: |
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raise ValueError("入力画像の形状が一致しません。") |
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image1 = image1.astype(float) |
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image2 = image2.astype(float) |
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alpha = cv2.cvtColor(mask, cv2.COLOR_GRAY2BGR).astype(float) / 255.0 |
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blended = (1 - alpha) * image1 + alpha * image2 |
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return blended.astype(np.uint8) |
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def create_color_image(img,color=(255,255,255)): |
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mask = np.zeros_like(img) |
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h, w = img.shape[:2] |
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cv2.rectangle(mask, (0, 0), (w, h), color, -1) |
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return mask |
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def pil_to_bgr_image(image): |
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np_image = np.array(image, dtype=np.uint8) |
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if np_image.shape[2] == 4: |
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bgr_img = cv2.cvtColor(np_image, cv2.COLOR_RGBA2BGRA) |
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else: |
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bgr_img = cv2.cvtColor(np_image, cv2.COLOR_RGB2BGR) |
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return bgr_img |
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def bgr_to_rgb(np_image): |
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if np_image.shape[2] == 4: |
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bgr_img = cv2.cvtColor(np_image, cv2.COLOR_RBGRA2RGBA) |
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else: |
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bgr_img = cv2.cvtColor(np_image, cv2.COLOR_BGR2RGB) |
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return bgr_img |