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resnet18

torchvision.models.quantization.resnet18(*, weights: Optional[Union[ResNet18_QuantizedWeights, ResNet18_Weights]] = None, progress: bool = True, quantize: bool = False, **kwargs: Any) QuantizableResNet[source]

ResNet-18 model from Deep Residual Learning for Image Recognition

Note

Note that quantize = True returns a quantized model with 8 bit weights. Quantized models only support inference and run on CPUs. GPU inference is not yet supported.

Parameters:
  • weights (ResNet18_QuantizedWeights or ResNet18_Weights, optional) – The pretrained weights for the model. See ResNet18_QuantizedWeights below for more details, and possible values. By default, no pre-trained weights are used.

  • progress (bool, optional) – If True, displays a progress bar of the download to stderr. Default is True.

  • quantize (bool, optional) – If True, return a quantized version of the model. Default is False.

  • **kwargs – parameters passed to the torchvision.models.quantization.QuantizableResNet base class. Please refer to the source code for more details about this class.

class torchvision.models.quantization.ResNet18_QuantizedWeights(value)[source]

The model builder above accepts the following values as the weights parameter. ResNet18_QuantizedWeights.DEFAULT is equivalent to ResNet18_QuantizedWeights.IMAGENET1K_FBGEMM_V1. You can also use strings, e.g. weights='DEFAULT' or weights='IMAGENET1K_FBGEMM_V1'.

ResNet18_QuantizedWeights.IMAGENET1K_FBGEMM_V1:

These weights were produced by doing Post Training Quantization (eager mode) on top of the unquantized weights listed below. Also available as ResNet18_QuantizedWeights.DEFAULT.

acc@1 (on ImageNet-1K)

69.494

acc@5 (on ImageNet-1K)

88.882

min_size

height=1, width=1

categories

tench, goldfish, great white shark, … (997 omitted)

backend

fbgemm

recipe

link

num_params

11689512

unquantized

ResNet18_Weights.IMAGENET1K_V1

GIPS

1.81

File size

11.2 MB

The inference transforms are available at ResNet18_QuantizedWeights.IMAGENET1K_FBGEMM_V1.transforms and perform the following preprocessing operations: Accepts PIL.Image, batched (B, C, H, W) and single (C, H, W) image torch.Tensor objects. The images are resized to resize_size=[256] using interpolation=InterpolationMode.BILINEAR, followed by a central crop of crop_size=[224]. Finally the values are first rescaled to [0.0, 1.0] and then normalized using mean=[0.485, 0.456, 0.406] and std=[0.229, 0.224, 0.225].

class torchvision.models.ResNet18_Weights(value)[source]

The model builder above accepts the following values as the weights parameter. ResNet18_Weights.DEFAULT is equivalent to ResNet18_Weights.IMAGENET1K_V1. You can also use strings, e.g. weights='DEFAULT' or weights='IMAGENET1K_V1'.

ResNet18_Weights.IMAGENET1K_V1:

These weights reproduce closely the results of the paper using a simple training recipe. Also available as ResNet18_Weights.DEFAULT.

acc@1 (on ImageNet-1K)

69.758

acc@5 (on ImageNet-1K)

89.078

min_size

height=1, width=1

categories

tench, goldfish, great white shark, … (997 omitted)

num_params

11689512

recipe

link

GFLOPS

1.81

File size

44.7 MB

The inference transforms are available at ResNet18_Weights.IMAGENET1K_V1.transforms and perform the following preprocessing operations: Accepts PIL.Image, batched (B, C, H, W) and single (C, H, W) image torch.Tensor objects. The images are resized to resize_size=[256] using interpolation=InterpolationMode.BILINEAR, followed by a central crop of crop_size=[224]. Finally the values are first rescaled to [0.0, 1.0] and then normalized using mean=[0.485, 0.456, 0.406] and std=[0.229, 0.224, 0.225].

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