rotated_coordinates = np.dot(rotation_z, np.dot(rotation_y, np.dot(rotation_x, coordinate)))

np.dot()函数的用法详解

主要介绍了np.dot()函数的用法详解，文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值，需要的朋友们下面随着小编来一起学习学习吧

Image_Rotation.rar_image_rotation_matlab rotation_matlab角度定义_图像中

imrotate函数的基本语法是rotatedImage = imrotate(originalImage, angle, 'method', 'cdataMapping')，其中originalImage是要旋转的原始图像，angle是旋转角度，method是选择的旋转方法（如'nearest'、'...

import random from PIL import Image import numpy as np class DataAugmentation: def init(self, dataset): self.dataset = dataset def rotate(self, image, angle): rotated_image = image.rotate(angle) return rotated_image def crop(self, image, crop_size): width, height = image.size left = random.randint(0, width - crop_size) upper = random.randint(0, height - crop_size) right = left + crop_size lower = upper + crop_size cropped_image = image.crop((left, upper, right, lower)) return cropped_image def mirror(self, image): mirrored_image = image.transpose(Image.FLIP_LEFT_RIGHT) return mirrored_image def augment(self, num_samples, crop_size): augmented_dataset = [] for i in range(num_samples): image = Image.open(self.dataset[i]) operations = [self.rotate, self.crop, self.mirror] operation = random.choice(operations) if operation == self.rotate: angle = random.randint(0, 360) augmented_image = self.rotate(image, angle) elif operation == self.crop: augmented_image = self.crop(image, crop_size) else: augmented_image = self.mirror(image) augmented_dataset.append(np.array(augmented_image)) return augmented_dataset

这是一个数据增强的类，用于对数据集进行图像增强操作。它具有以下方法： - rotate(image, angle)：旋转图像，接受一个图像和旋转角度作为参数，并返回旋转后的图像。 - crop(image, crop_size)：裁剪图像，...

def process_image(image_path, output_folder): gray = cv2.imread(image_path) edges = cv2.Canny(gray, 50, 150) lines = cv2.HoughLines(edges, 1, np.pi / 180, threshold=90) sum_angle = 0 count = 0 if lines is not None: for line in lines: rho, theta = line[0] angle = theta * 180 / np.pi sum_angle += angle count += 1 avg_angle = sum_angle / count rotated_image = rotate_image(gray, avg_angle) filename = os.path.basename(image_path) output_path = os.path.join(output_folder, filename) cv2.imwrite(output_path, rotated_image) def rotate_image(image, angle): height, width = image.shape[:2] center = (width // 2, height // 2) rotation_matrix = cv2.getRotationMatrix2D(center, angle, 1.0) rotated_image = cv2.warpAffine(image, rotation_matrix, (width, height)) return rotated_image input_folder = 'img_out_binary' output_folder = 'rotated_img' os.makedirs(output_folder, exist_ok=True) for filename in os.listdir(input_folder): if filename.endswith(".jpg") or filename.endswith(".JPG"): image_path = os.path.join(input_folder, filename) process_image(image_path, output_folder) 优化程序，使程序可以对图片文件名包含汉字的图片进行处理和保存

lines = cv2.HoughLines(edges, 1, np.pi / 180, threshold=90) sum_angle = 0 count = 0 if lines is not None: for line in lines: rho, theta = line[0] angle = theta * 180 / np.pi sum_angle += angle...

def rotate_batch_image(batch_image, angle): rotateds = [] for img in batch_image: img = img * 0.5 + 0.5 pil_img = tf.to_pil_image(img.type(torch.FloatTensor)) img_rotated = tf.rotate(pil_img, angle=angle) # Image._show(img_rotated) img_rotated = (tf.to_tensor(img_rotated) - 0.5) / 0.5 rotateds.append(img_rotated) rotateds = torch.stack(rotateds, dim=0).cuda() return rotateds

这是一个用于旋转批量图像的Python函数，输入为一个批量图像数据（batch_image）和旋转角度（angle），输出为旋转后的批量图像数据（rotateds）。具体实现如下： 1. 遍历批量图像数据中的每张图像。...

def _calc(self, h, t, r): # Calculate rotated complex embeddings re_head, im_head = torch.chunk(h, 2, dim=-1) # 头实体：分块实数域与复数域 re_tail, im_tail = torch.chunk(t, 2, dim=-1) # 尾实体： re_relation, im_relation = torch.chunk(r, 2, dim=-1) # 关系： re_head = torch.unsqueeze(re_head, dim=-1) im_head = torch.unsqueeze(im_head, dim=-1) re_tail = torch.unsqueeze(re_tail, dim=-1) im_tail = torch.unsqueeze(im_tail, dim=-1) # Perform rotation re_h = re_head * re_relation - im_head * im_relation im_h = re_head * im_relation + im_head * re_relation re_t = re_tail * re_relation + im_tail * im_relation im_t = -re_tail * im_relation + im_tail * re_relation # Concatenate real and imaginary part of embeddings h = torch.cat([re_h, im_h], dim=-1) t = torch.cat([re_t, im_t], dim=-1) return h, t解释

这段代码是一个用于在知识图谱中进行实体关系预测的模型中的一个函数。该函数的作用是将头实体、尾实体和关系的复杂向量表示进行旋转，得到新的向量表示。具体来说，该函数首先将头实体、尾实体和关系的复杂向量表示...

from PIL import Image, ImageDraw # 将图片平移并旋转 gray2 = Image.fromarray(src) width, height = gray2.size # 计算中心点和X轴角度 center = (max_point[0], max_point[1]) angle = np.arctan2(point2[1] - max_point[1], point2[0] - max_point[0]) * 180 / np.pi img_translated = gray2.transform((width, height), Image.AFFINE, (1, 0, center[0] - width/2, 0, 1, center[1] - height/2), resample=Image.BICUBIC) img_translated_rotated = img_translated.rotate(angle, resample=Image.BICUBIC, expand=True) #img_translated_rotated.show() #裁剪 img4 = Image.fromarray(src) width1, height1 = img4.size width2, height2 = img_translated_rotated.size left = (width2 - width1 )/2 top = (height2 - height1 )/2 right = (width2 - width1 )/2 + width1 bottom = (height2 - height1 )/2 + height1 cropped_image = img_translated_rotated.crop((left, top, right, bottom )) import cv2 GRID_STEP = distance/2 # 设置1010栅格（暂时尝试） grid_num_x = 10 grid_num_y = 10 def transform_point_set(points, max_point, distance, angle): # 平移向量 translation_vector = np.array(2: draw.ellipse((point[0]-5, point[1]-5, point[0]+5, point[1]+5), fill="red", outline="red") x, y = max_point[0], max_point[1] #注意这里坐标轴的顺序 # 显示图片 img.show()操作之后点和在图上原本的位置不再重合，请调试

这段代码的作用是对图像进行平移和旋转，并进行裁剪操作，最后在图像上显示标记点。其中，平移和旋转的过程中使用了PIL库的transform和rotate函数，裁剪则使用了crop函数。在最后的操作中，使用了opencv库的ellipse...

请帮我优化一下这段代码def Perspective_transform(box,original_img): # # 获取画框宽高(x=orignal_W,y=orignal_H) # orignal_W = math.ceil(np.sqrt((box[3][1] - box[2][1])2 + (box[3][0] - box[2][0])2)) # orignal_H= math.ceil(np.sqrt((box[3][1] - box[0][1])2 + (box[3][0] - box[0][0])2)) # # # 原图中的四个顶点,与变换矩阵 # pts1 = np.float32([box[0], box[1], box[2], box[3]]) # pts2 = np.float32([[int(orignal_W+1),int(orignal_H+1)], [0, int(orignal_H+1)], [0, 0], [int(orignal_W+1), 0]]) # # # 生成透视变换矩阵；进行透视变换 # M = cv2.getPerspectiveTransform(pts1, pts2) # result_img = cv2.warpPerspective(original_img, M, (int(orignal_W+3),int(orignal_H+1))) # ROTATED_SIZE_W = 600 # 透视变换后的表盘图像大小 ROTATED_SIZE_H = 800 # 透视变换后的表盘图像大小 # 原图中书本的四个角点(左上、右上、右下、左下),与变换后矩阵位置 #pts1 = np.float32([[63, 72], [163, 32], [268, 144], [150, 215]]) pts1 = np.float32([box[0], box[1], box[2], box[3]]) # 变换后矩阵位置 pts2 = np.float32([[0, 0], [ROTATED_SIZE_W, 0], [ROTATED_SIZE_W, ROTATED_SIZE_H], [0, ROTATED_SIZE_H], ]) # 生成透视变换矩阵；进行透视变换 M = cv2.getPerspectiveTransform(pts1, pts2) result_img = cv2.warpPerspective(original_img, M, (ROTATED_SIZE_W, ROTATED_SIZE_H)) return result_img

pts2 = np.float32([[0, 0], [rotated_size_w, 0], [rotated_size_w, rotated_size_h], [0, rotated_size_h]]) # 生成透视变换矩阵；进行透视变换 M = cv2.getPerspectiveTransform(pts1, pts2) result_img = ...

import cv2 import numpy as np def main(): # 1.导入图片 img_src = cv2.imread("cc.jpg") # 2.灰度化,二值化 img_gray = cv2.cvtColor(img_src, cv2.COLOR_BGR2GRAY) ret, img_bin = cv2.threshold(img_gray, 127, 255, cv2.THRESH_BINARY) # 3.连通域分析 img_bin, contours, hierarchy = cv2.findContours(img_bin, cv2.RETR_LIST, cv2.CHAIN_APPROX_SIMPLE) # 4.获取最小外接矩形并打印 min_rect = cv2.minAreaRect(contours[0]) print("返回值min_rect:\n", min_rect) rect_points = cv2.boxPoints(min_rect) print("返回值rect_points:\n", rect_points) rect_points = np.int0(rect_points) # 5.绘制最小外接矩形 img_result = img_src.copy() cv2.drawContours(img_result, [rect_points], 0, (255, 255, 255), 2) # 6.显示结果图片 cv2.imshow("img_src", img_src) cv2.imshow("img_result", img_result) cv2.waitKey() cv2.destroyAllWindows() if name == 'main': main()怎么把图像摆正

center = tuple(np.array(img_src.shape[1::-1]) / 2) # 生成变换矩阵 M = cv2.getRotationMatrix2D(center, angle, 1) # 应用变换矩阵 img_result_rotated = cv2.warpAffine(img_result, M, img_src.shape[1::-1]...

if self.result_img_area.pixmap() is not None: # 获取QLabel中的图像 pixmap = self.result_img_area.pixmap() angle=90 # 新建一个QPixmap，并将旋转后的图像绘制到其中 rotated_pixmap = QPixmap(pixmap.size()) rotated_pixmap.fill(Qt.transparent) painter = QPainter(rotated_pixmap) painter.translate(pixmap.size().width() / 2, pixmap.size().height() / 2) painter.rotate(angle) painter.translate(-pixmap.size().width() / 2, -pixmap.size().height() / 2) painter.drawPixmap(0, 0, pixmap) painter.end() # 将旋转后的图像设置为QLabel中的图像 self.result_img_area.setPixmap(rotated_pixmap)详细解释代码

然后，新建一个和原图像大小相同的 QPixmap 对象 rotated_pixmap，并设置为透明： python rotated_pixmap = QPixmap(pixmap.size()) rotated_pixmap.fill(Qt.transparent) 接下来，通过 QPainter 对象 ...

from PIL import Image, ImageDraw # 将图片平移并旋转 gray2 = Image.fromarray(src) width, height = gray2.size # 计算中心点和X轴角度 center = (max_point[0], max_point[1]) angle = np.arctan2(point2[1] - max_point[1], point2[0] - max_point[0]) * 180 / np.pi img_translated = gray2.transform((width, height), Image.AFFINE, (1, 0, center[0] - width/2, 0, 1, center[1] - height/2), resample=Image.BICUBIC) img_translated_rotated = img_translated.rotate(angle, resample=Image.BICUBIC, expand=True)from PIL import Image, ImageDraw #裁剪 img4 = Image.fromarray(src) width1, height1 = img4.size width2, height2 = img_translated_rotated.size left = (width2 - width1 )/2 top = (height2 - height1 )/2 right = (width2 - width1 )/2 + width1 bottom = (height2 - height1 )/2 + height1 cropped_image = img_translated_rotated.crop((left, top, right, bottom )) 现在已知在旋转前的图片gray2上有对应的点集合points，对点集points进行平移和旋转变换，使得其能在旋转后图片上完全重合的代码

可以参考以下代码： python ...cropped_image = img_translated_rotated.crop((left, top, right, bottom)) 其中，假设最大点为(100, 100)、另一个点为(200, 200)，可以根据实际情况修改。

from PIL import Image, ImageDraw #裁剪 img4 = Image.fromarray(src) width1, height1 = img4.size width2, height2 = img_translated_rotated.size left = (width2 - width1 )/2 top = (height2 - height1 )/2 right = (width2 - width1 )/2 + width1 bottom = (height2 - height1 )/2 + height1 cropped_image = img_translated_rotated.crop((left, top, right, bottom )) # 导入图片（） #上面写过的x, y = max_point[0], max_point[1] points3 = [] for point in points: # 将点按照相同的平移和旋转方式进行变换 x_new = int((point[0] - x) * np.cos(angle) - (point[1] - y) * np.sin(angle) + x + left) y_new = int((point[0] - x) * np.sin(angle) + (point[1] - y) * np.cos(angle) + y) points3.append((x_new, y_new)) print(points3)

这段代码的作用是对图像进行裁剪和旋转操作，并将给定的点按照相同的平移和旋转方式进行变换。具体来说，它首先导入了PIL库中的Image和ImageDraw模块，然后使用Image.fromarray()函数将给定的图像数据转换为Image...

def deal_threshold(image): gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY) Imgaepil = Image.fromarray(gray) # 边缘检测 edges = cv2.Canny(gray, 50, 150) # 使用霍夫变换检测直线 lines = cv2.HoughLines(edges, 1, np.pi / 180, threshold=70) sumang = 0 thresh = None if (lines is not None): for line in lines: anglep = line[0][1] * 180 / np.pi if (anglep > 90): anglep = 180 - anglep print(anglep) sumang = sumang + anglep angle = sumang / len(lines) thresh = Imgaepil.rotate(angle) return thresh def process_images(input_folder, output_folder): # 创建输出文件夹 os.makedirs(output_folder, exist_ok=True) # 遍历输入文件夹中的图片 for filename in os.listdir(input_folder): if filename.endswith(".jpg") or filename.endswith(".png") or filename.endswith(".JPG"): # 读取图片 image_path = os.path.join(input_folder, filename) image = cv2.imread(image_path) # 处理图片 thresh = deal_threshold(image) # 保存处理后的图片 output_path = os.path.join(output_folder, filename) cv2.imwrite(output_path, thresh) print(f"Processed {filename}") # 指定输入文件夹和输出文件夹 input_folder = "img_out_binary" output_folder = "rotated_img" # 调用函数进行处理 process_images(input_folder, output_folder)，程序执行后提示 cv2.imwrite(output_path, thresh) cv2.error: OpenCV(4.7.0) D:\a\opencv-python\opencv-python\opencv\modules\imgcodecs\src\loadsave.cpp:783: error: (-215:Assertion failed) !_img.empty() in function 'cv::imwrite'，优化程序

在你的代码中，出现了一个错误，即 cv2.imwrite 报错：cv2.error: OpenCV(4.7.0) D:\a\opencv-python\opencv-python\opencv\modules\imgcodecs\src\loadsave.cpp:783: error: (-215:Assertion failed) !...

解释这段代码def render(self, mode='human'): self.ax.clear() # 绘制线路 for i in range(len(self.obstacle_pos)): self.ax.fill(self.obstacle_pos[i][0], self.obstacle_pos[i][1], color=self.color) # 智能体位置更新 for index, agent in enumerate(self.agents): rotated_plane_data = ndimage.rotate(agent.plane, 0, reshape=True) self.ax.imshow(rotated_plane_data, extent=[agent.position[0] - self.agent_size, agent.position[0] + self.agent_size, agent.position[1] - self.agent_size, agent.position[1]+self.agent_size]) for corner in self.corner_position: # 画面固定 self.ax.scatter(corner[0], corner[1], marker='o', color='white') # 轨迹更新 # for path in self.paths: # x, y = zip(*path) # self.ax.plot(x, y, 'b--') self.fig.canvas.draw() plt.pause(0.01)

这段代码是一个强化学习环境中的渲染函数，用于将当前状态可视化，其中mode是渲染模式，可以是'human'或其他字符串。该函数的具体实现包括以下几个步骤： 1. 清除绘图区域； 2. 绘制障碍物的轮廓；...

import cv2 img = cv2.imread('D:/Download/windows_v1.6.0/img/99.jpg') # 把图片像素的行数，列数返回给rows，cols rows, cols, _ = img.shape # 旋转角度 angle = 45 # 计算旋转矩阵 M = cv2.getRotationMatrix2D((cols / 2, rows / 2), angle, 1) # 旋转图片 rotated_img = cv2.warpAffine(img, M, (cols, rows)) # 显示结果图像 cv2.imshow('xx', img) cv2.imshow('Rotated Image', rotated_img) cv2.waitKey(0) cv2.destroyAllWindows()

5. 使用cv2.warpAffine()函数，通过旋转矩阵M对图片进行旋转操作，得到旋转后的图片rotated_img。 6. 使用cv2.imshow()函数显示原始图片img和旋转后的图片rotated_img。 7. 使用cv2.waitKey()函数等待用户按下任意键...

如何修改这段代码 def render(self, mode='human'): self.ax.clear() # 绘制线路 for i in range(len(self.obstacle_pos)): self.ax.fill(self.obstacle_pos[i][0], self.obstacle_pos[i][1], color=self.color) # 智能体位置更新 for index, agent in enumerate(self.agents): rotated_plane_data = ndimage.rotate(agent.plane, 0, reshape=True) self.ax.imshow(rotated_plane_data, extent=[agent.position[0] - self.agent_size, agent.position[0] + self.agent_size, agent.position[1] - self.agent_size, agent.position[1]+self.agent_size]) for corner in self.corner_position: # 画面固定 self.ax.scatter(corner[0], corner[1], marker='o', color='white') # 轨迹更新 # for path in self.paths: # x, y = zip(*path) # self.ax.plot(x, y, 'b--') self.fig.canvas.draw() plt.pause(0.01)使得其在jupyter运行出来的图片变大

要在 Jupyter 中放大此代码生成的图片，可以尝试使用以下代码： import matplotlib.pyplot as plt %matplotlib inline %config InlineBackend.figure_format = 'retina' plt.rcParams['figure.figsize'] = [8,...

import cv2 import numpy as np # 读取原始图像 img = cv2.imread('image.webp') # 缩放变换 scale_percent = 50 # 缩放比例 width = int(img.shape[1] * scale_percent / 100) # 新图像宽度 height = int(img.shape[0] * scale_percent / 100) # 新图像高度 dim = (width, height) resized = cv2.resize(img, dim, interpolation = cv2.INTER_AREA) # 旋转变换 angle = 45 # 旋转角度 rotation_matrix = cv2.getRotationMatrix2D((img.shape[1]/2, img.shape[0]/2), angle, 1) rotated = cv2.warpAffine(img, rotation_matrix, (img.shape[1], img.shape[0])) # 平移变换 x = 50 # 水平方向平移像素数 y = 100 # 垂直方向平移像素数 translation_matrix = np.float32([[1, 0, x], [0, 1, y]]) translated = cv2.warpAffine(img, translation_matrix, (img.shape[1], img.shape[0])) # 裁剪变换 x1 = 100 # 左上角横坐标 y1 = 100 # 左上角纵坐标 x2 = 300 # 右下角横坐标 y2 = 300 # 右下角纵坐标 cropped = img[y1:y2, x1:x2] # 镜像变换 mirrored = cv2.flip(img, 1) # 在同一个窗口内分成六个子窗口来分别显示原图和变换后的图像 cv2.namedWindow('Image', cv2.WINDOW_NORMAL) cv2.resizeWindow('Image', 700, 700) cv2.imshow('Image', np.vstack((img, resized, rotated, translated, cropped, mirrored))) cv2.waitKey(0) cv2.destroyAllWindows()优化这段代码，并显示结果图

translation_matrix = np.float32([[1, 0, x], [0, 1, y]]) translated = cv2.warpAffine(img, translation_matrix, (img.shape[1], img.shape[0])) transformed_images.append(translated) elif transformation...

angle = 45 center = (gray.shape[1] // 2, gray.shape[0] // 2)# 生成旋转矩阵 M = cv2.getRotationMatrix2D(center, angle, scale=0.8)# 计算旋转后的图像尺寸 max_dim = max(gray.shape) rotated_size = (max_dim, max_dim)# 执行旋转操作 rotated = cv2.warpAffine(gray, M, rotated_size, flags=cv2.INTER_LINEAR)# 显示旋转后的图像 cv2.imshow('Rotated Image', rotated)# 等待按键响应 cv2.waitKey(0)# 释放窗口 cv2.destroyAllWindows() plt.imshow(rotated) plt.show()

- rotated_size：旋转后的图像尺寸，为一个元组。 - rotated：执行旋转操作得到的旋转后的图像。 - flags：插值方法，默认为cv2.INTER_LINEAR。 - cv2.imshow()：显示旋转后的图像。 - cv2.waitKey()：...

rotated_coordinates = np.dot(rotation_z, np.dot(rotation_y, np.dot(rotation_x, coordinate)))

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