microsoftml.resize_image: Mengubah ukuran gambar

Usage

microsoftml.resize_image(cols: [str, dict, list], width: int = 224,
    height: int = 224, resizing_option: ['IsoPad', 'IsoCrop',
    'Aniso'] = 'IsoCrop', **kargs)

Deskripsi

Mengubah ukuran gambar ke dimensi tertentu menggunakan metode pengubahan ukuran yang ditentukan.

Rincian

resize_image mengubah ukuran gambar menjadi tinggi dan lebar yang ditentukan menggunakan metode pengubah ukuran yang ditentukan. Variabel input untuk transformasi ini harus berupa gambar, biasanya hasil dari transformasi tersebut load_image .

Arguments

Cols

String karakter atau daftar nama variabel yang akan ditransformasi. Jika dict, kunci tersebut mewakili nama-nama variabel baru yang akan dibuat.

lebar

Menentukan lebar gambar yang diskalakan dalam piksel. Nilai defaultnya adalah 224.

tinggi

Menentukan tinggi gambar yang diskalakan dalam piksel. Nilai defaultnya adalah 224.

resizing_option

Metode pengubahan ukuran yang digunakan telah ditentukan. Perlu dicatat bahwa semua metode menggunakan interpolasi bilinear. Opsinya adalah:

  • "IsoPad": Gambar diubah ukurannya sehingga rasio aspek tetap terjaga. Jika diperlukan, gambar dilapisi warna hitam agar sesuai dengan lebar atau tinggi baru.

  • "IsoCrop": Gambar diubah ukurannya sehingga rasio aspek tetap terjaga. Jika diperlukan, gambar dipotong agar sesuai dengan lebar atau tinggi baru.

  • "Aniso": Gambar diregangkan ke lebar dan tinggi baru, tanpa mempertahankan rasio aspek.

Nilai defaultnya adalah "IsoPad".

karg

Argumen tambahan dikirim ke mesin komputasi.

Pengembalian Barang

Objek yang menentukan transformasi.

Contoh

'''
Example with images.
'''
import numpy
import pandas
from microsoftml import rx_neural_network, rx_predict, rx_fast_linear
from microsoftml import load_image, resize_image, extract_pixels
from microsoftml.datasets.image import get_RevolutionAnalyticslogo

train = pandas.DataFrame(data=dict(Path=[get_RevolutionAnalyticslogo()], Label=[True]))

# Loads the images from variable Path, resizes the images to 1x1 pixels
# and trains a neural net.
model1 = rx_neural_network("Label ~ Features", data=train, 
            ml_transforms=[            
                    load_image(cols=dict(Features="Path")), 
                    resize_image(cols="Features", width=1, height=1, resizing="Aniso"), 
                    extract_pixels(cols="Features")], 
            ml_transform_vars=["Path"], 
            num_hidden_nodes=1, num_iterations=1)

# Featurizes the images from variable Path using the default model, and trains a linear model on the result.
# If dnnModel == "AlexNet", the image has to be resized to 227x227.
model2 = rx_fast_linear("Label ~ Features ", data=train, 
            ml_transforms=[            
                    load_image(cols=dict(Features="Path")), 
                    resize_image(cols="Features", width=224, height=224), 
                    extract_pixels(cols="Features")], 
            ml_transform_vars=["Path"], max_iterations=1)

# We predict even if it does not make too much sense on this single image.
print("\nrx_neural_network")
prediction1 = rx_predict(model1, data=train)
print(prediction1)

print("\nrx_fast_linear")
prediction2 = rx_predict(model2, data=train)
print(prediction2)

Output:

Automatically adding a MinMax normalization transform, use 'norm=Warn' or 'norm=No' to turn this behavior off.
Beginning processing data.
Rows Read: 1, Read Time: 0, Transform Time: 0
Beginning processing data.
Beginning processing data.
Rows Read: 1, Read Time: 0, Transform Time: 0
Beginning processing data.
Beginning processing data.
Rows Read: 1, Read Time: 0.001, Transform Time: 0
Beginning processing data.
Using: AVX Math

***** Net definition *****
  input Data [3];
  hidden H [1] sigmoid { // Depth 1
    from Data all;
  }
  output Result [1] sigmoid { // Depth 0
    from H all;
  }
***** End net definition *****
Input count: 3
Output count: 1
Output Function: Sigmoid
Loss Function: LogLoss
PreTrainer: NoPreTrainer
___________________________________________________________________
Starting training...
Learning rate: 0.001000
Momentum: 0.000000
InitWtsDiameter: 0.100000
___________________________________________________________________
Initializing 1 Hidden Layers, 6 Weights...
Estimated Pre-training MeanError = 0.707823
Iter:1/1, MeanErr=0.707823(0.00%), 0.01M WeightUpdates/sec
Done!
Estimated Post-training MeanError = 0.707499
___________________________________________________________________
Not training a calibrator because it is not needed.
Elapsed time: 00:00:00.0820600
Elapsed time: 00:00:00.0090292
Automatically adding a MinMax normalization transform, use 'norm=Warn' or 'norm=No' to turn this behavior off.
Beginning processing data.
Rows Read: 1, Read Time: 0, Transform Time: 0
Beginning processing data.
Beginning processing data.
Rows Read: 1, Read Time: 0, Transform Time: 0
Beginning processing data.
Beginning processing data.
Rows Read: 1, Read Time: 0, Transform Time: 0
Beginning processing data.
Using 2 threads to train.
Automatically choosing a check frequency of 2.
Auto-tuning parameters: L2 = 5.
Auto-tuning parameters: L1Threshold (L1/L2) = 1.
Using model from last iteration.
Not training a calibrator because it is not needed.
Elapsed time: 00:00:01.0852660
Elapsed time: 00:00:00.0132126

rx_neural_network
Beginning processing data.
Rows Read: 1, Read Time: 0, Transform Time: 0
Beginning processing data.
Elapsed time: 00:00:00.0441601
Finished writing 1 rows.
Writing completed.
  PredictedLabel     Score  Probability
0          False -0.028504     0.492875

rx_fast_linear
Beginning processing data.
Rows Read: 1, Read Time: 0.001, Transform Time: 0
Beginning processing data.
Elapsed time: 00:00:00.5196788
Finished writing 1 rows.
Writing completed.
  PredictedLabel  Score  Probability
0          False    0.0          0.5

Konten terkait

  • Last updated on