image = Image.fromarray(np.uint8(seg_img ))
时间: 2023-11-17 13:05:11 浏览: 169
这行代码的作用是将一个 NumPy 数组转换为 PIL 库中的 Image 对象。其中,`seg_img` 是一个 NumPy 数组,它表示一张图像的分割结果,每个像素点的值代表该像素属于哪一个类别。`np.uint8()` 将数组中的数据类型转换为无符号 8 位整数,其取值范围为 0~255。而 `Image.fromarray()` 则将这个 NumPy 数组转换为 PIL 库中的 Image 对象,方便后续的图像处理和展示。
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if __name__ == "__main__": unet = Unet() mode = "fps" video_path = "ID01.mp4" video_save_path = "ID01dect3.mp4" video_fps = 50.0 test_interval = 1000 dir_origin_path = "img/" dir_save_path = "img_out/" if mode == "predict": seg_img = np.zeros((np.shape(pr)[0],np.shape(pr)[1],3)) for c in range(self.num_classes): seg_img[:, :, 0] += ((pr == c)*( self.colors[c][0] )).astype('uint8') seg_img[:, :, 1] += ((pr == c)*( self.colors[c][1] )).astype('uint8') seg_img[:, :, 2] += ((pr == c)*( self.colors[c][2] )).astype('uint8') ''' while True: img = input('Input image filename:') try: image = Image.open(img) except: print('Open Error! Try again!') continue else: r_image = unet.detect_image(image) r_image.show() elif mode == "video": capture=cv2.VideoCapture(video_path) if video_save_path!="": fourcc = cv2.VideoWriter_fourcc(*'XVID') size = (int(capture.get(cv2.CAP_PROP_FRAME_WIDTH)), int(capture.get(cv2.CAP_PROP_FRAME_HEIGHT))) out = cv2.VideoWriter(video_save_path, fourcc, video_fps, size) ref, frame = capture.read() if not ref: raise ValueError("未能正确读取摄像头(视频),请注意是否正确安装摄像头(是否正确填写视频路径)。") fps = 0.0 while(True): t1 = time.time() # 读取某一帧 ref, frame = capture.read() if not ref: break # 格式转变,BGRtoRGB frame = cv2.cvtColor(frame,cv2.COLOR_BGR2RGB) # 转变成Image frame = Image.fromarray(np.uint8(frame)) # 进行检测 frame = np.array(unet.detect_image(frame)) # RGBtoBGR满足opencv显示
这段代码是一个使用Unet模型进行图像分割的程序。其中,`mode`变量可以设置为`predict`或`video`,分别代表单张图片的预测和视频流的分割。
在`predict`模式下,程序会读取一个图片,然后使用Unet模型进行分割,最后将分割结果显示出来。
在`video`模式下,程序会读取一个视频文件,然后对每一帧进行分割,最后将分割后的视频保存下来。
在进行分割时,程序会将分割结果可视化为彩色图像,其中每一类的像素点会被标记为不同的颜色。
给出相同功能的代码import os import numpy as np import nibabel as nib import imageio from PIL import Image def read_niifile(niifilepath): # 读取niifile文件 img = nib.load(niifilepath) # 提取niifile文件 img_fdata = img.get_fdata(dtype='float32') return img_fdata def save_fig(niifilepath, savepath, num, name): # 保存为图片 name = name.split('-')[1] filepath_seg = niifilepath + "segmentation\\" + "segmentation-" + name filepath_vol = niifilepath + "volume\\" + "volume-" + name savepath_seg = savepath + "segmentation\\" savepath_vol = savepath + "volume\\" if not os.path.exists(savepath_seg): os.makedirs(savepath_seg) if not os.path.exists(savepath_vol): os.makedirs(savepath_vol) fdata_vol = read_niifile(filepath_vol) fdata_seg = read_niifile(filepath_seg) (x, y, z) = fdata_seg.shape total = x * y for k in range(z): silce_seg = fdata_seg[:, :, k] if silce_seg.max() == 0: continue else: silce_seg = (silce_seg - silce_seg.min()) / (silce_seg.max() - silce_seg.min()) * 255 silce_seg = np.uint8(Image.fromarray(silce_seg).convert('L')) silce_seg = cv2.threshold(silce_seg, 1, 255, cv2.THRESH_BINARY)[1] if (np.sum(silce_seg == 255) / total) > 0.015: silce_vol = fdata_vol[:, :, k] silce_vol = (silce_vol - silce_vol.min()) / (silce_vol.max() - silce_vol.min()) * 255 silce_vol = np.uint8(Image.fromarray(silce_vol).convert('L')) imageio.imwrite(os.path.join(savepath_seg, '{}.png'.format(num)), silce_seg) imageio.imwrite(os.path.join(savepath_vol, '{}.png'.format(num)), silce_vol) num += 1 return num if __name__ == '__main__': path = r'C:\Users\Administrator\Desktop\LiTS2017' savepath = r'C:\Users\Administrator\Desktop\2D-LiTS2017' filenames = os.listdir(path + "segmentation") num = 0 for filename in filenames: num = save_fig(path, savepath, num, filename)
这段代码与之前的代码实现不同,它是用于将3D医学图像数据转换为2D图像的。具体来说,它实现了以下功能:
1. 读取niifile文件,提取数据。
2. 将数据保存为图片。
3. 根据阈值判断是否需要保存该图片。
这个代码可以用于医学图像的预处理,如将3D CT或MRI图像数据转换为2D图像进行训练或展示。
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