TypeError:切片索引必须是整数或None,或者具有__index__方法(Albumentations/NumP



大家好,你能帮我吗?我用随机裁剪增强得到了这个bug。TypeError:切片索引必须是整数或None,或者具有索引方法

代码如下。

!conda install -c conda-forge gdcm -y
import os
import numpy as np
import pandas as pd
import matplotlib.pyplot as plt
from PIL import Image
import cv2 as cv
import albumentations as A
import pydicom
from pydicom.pixel_data_handlers.util import apply_voi_lut
from tqdm.auto import tqdm
def read_img(path, voi_lut=True, fix_monochrome=True):
dcm = pydicom.read_file(path)

if voi_lut:
img = apply_voi_lut(dcm.pixel_array, dcm)
else:
img = dcm.pixel_array

if fix_monochrome and dcm.PhotometricInterpretation == "MONOCHROME1":
img = np.amax(img) - img

img = img - np.min(img)
img = img / np.max(img)
img = (img * 255).astype(np.uint8)

return img
def resize_img(img, size, pad=True, resample=Image.LANCZOS):
img = np.array(img)

if pad:
max_width = 4891
max_height = 4891

img = np.pad(img, ((0, max_height - img.shape[0]), (0, max_width - img.shape[1]), (0, 0)))

img = img.resize((size, size), resample)

return img
def augment_img(img, clahe=True, albumentations=True):
if clahe:
clahe = cv.createCLAHE(clipLimit=15.0, tileGridSize=(8,8))
img = clahe.apply(img)
else:
img = cv.equalizeHist(img)

if albumentations:
img = np.stack((img, ) * 3, axis=-1)

transform = A.Compose([
A.RandomSunFlare(p=0.2), 
A.RandomFog(p=0.2), 
A.RandomBrightness(p=0.2),
A.RandomCrop(p=1.0, width=img.shape[0] / 2, height=img.shape[1] / 2), 
A.Rotate(p=0.2, limit=90),
A.RGBShift(p=0.2), 
A.RandomSnow(p=0.2),
A.HorizontalFlip(p=0.2), 
A.VerticalFlip(p=0.2), 
A.RandomContrast(p=0.2, limit=0.2),
A.HueSaturationValue(p=0.2, hue_shift_limit=20, sat_shift_limit=30, val_shift_limit=50)
])

img = transform(image=img)["image"]

return img
img = read_img('../input/siim-covid19-detection/test/00188a671292/3eb5a506ccf3/3dcdfc352a06.dcm') #You can replace this with any .dcm filepath on your system
img = augment_img(img)
img = resize_img(img, 1024)
plt.imshow(img, cmap='gray')

这是为SIIM Kaggle比赛准备的。我不知道如何解决这个问题,而问题只是随机作物。我试着在网上搜索,但无法。

我认为错误在这一行:

A.RandomCrop(p=1.0, width=img.shape[0] / 2, height=img.shape[1] / 2)

这里的问题是,你的宽度和高度可能不是整数,但它们必须是。

检查相册随机裁剪文档。

这是解决方案

  1. 将width和height参数显式转换为integer:
A.RandomCrop(p=1.0, width=int(img.shape[0] / 2), height=int(img.shape[1] / 2))
  1. 使用整数除法:
A.RandomCrop(p=1.0, width=img.shape[0] // 2, height=img.shape[1] // 2)

如果有帮助,请告诉我!

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