单看函数名,ToTorch只需要把数据类型换一下,没必要做形状变化。就因为ToTorch这一步,后续还要用transpose把形状转回来,那用ToTorch转换形状岂不是多此一举? 答: pytorch选择设计成chw而不是hwc(毕竟传统的读图片的函数opencv的cv2.imread或者sklearn的imread都是读成hwc的格式的)这点确实比较令初学者困惑。个人...
或许你可以参考这个pytorch官网的讨论:https://discuss.pytorch.org/t/why-does-pytorch-prefer-using-...
至于为什么pytorch选择设计成chw而不是hwc(毕竟传统的读图片的函数opencv的cv2.imread或者sklearn的imread...
transpose((2, 0, 1))[::-1] # HWC to CHW, BGR to RGB im_vehicle = np.ascontiguousarray(im_vehicle) im_vehicle = torch.from_numpy(im_vehicle).to(device) im_vehicle = im_vehicle.half() if half else im_vehicle.float() # uint8 to fp16/32 im_vehicle /= 255 # 0 - 255 to...
CHW转为HWC numpy python python转c代码 python调用c程序,通过动态链接库的方法比较麻烦,需要各种转换。另外一种比较直接的方法是使用pyobject扩展实现。 本文参考了。 python调用c程序 一、原理 二、实现 1. 编写c程序 2. 编写封装程序 3. 定义方法 4. 初始化...
# HWC to CHW # img = img.transpose((2, 0, 1)) #Normalize # img = img / 255 #像素值归一化 mean = [0.31169346, 0.25506335, 0.12432463] std = [0.34042713, 0.29819837, 0.1375536] # img[0] = (img[0] - mean[0]) / std[0] ...
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