Commit 3f9c09d7 authored by Tiago de Freitas Pereira's avatar Tiago de Freitas Pereira
Browse files

Created a scaler transformer

parent 1c13eb81
#!/usr/bin/env python
# vim: set fileencoding=utf-8 :
from sklearn.base import TransformerMixin, BaseEstimator
from skimage.transform import resize
import numpy as np
from sklearn.utils import check_array
class Scale(TransformerMixin, BaseEstimator):
Simple scales an images
target_img_size: tuple
Target image size
def __init__(self, target_img_size, **kwargs):
self.target_img_size = target_img_size
def _more_tags(self):
return {"stateless": True, "requires_fit": False}
def fit(self, X, y=None):
return self
def transform(self, X):
Resize an image given a shape
Input image
target_img_size: tuple
Target image size
def _resize(x):
return resize(x, self.target_img_size, anti_aliasing=True)
X = check_array(X, allow_nd=True)
if X.ndim <= 3 and X.ndim >= 4:
raise ValueError(f"Invalid image shape {X.shape}")
if X.ndim == 3:
# Checking if it's bob format CxHxW
if X.shape[0] == 3:
X = np.moveaxis(X, -1, 0)
return _resize(X)
# Batch of images
if X.ndim == 4:
# Checking if it's bob format NxCxHxW
if X.shape[1] == 3:
X = np.moveaxis(X, 1, -1)
return [_resize(x) for x in X]
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