In May 2019, Google released a family of image classification models called , and designed for performance on mobile CPU, GPU, and EdgeTPU. EfficientNet-Lite brings the power of EfficientNet to edge devices and comes in five variants, allowing users to choose from the low latency/model size option (EfficientNet-Lite0) to the high accuracy option (EfficientNet-Lite4). The largest variant, integer-only quantized EfficientNet-Lite4, achieves 80.4% ImageNet top-1 accuracy, while still running in real-time (e.g. 30ms/image) on a Pixel 4 CPU. Below is how the quantized EfficientNet-Lite models perform compared to similarly quantized version of some popular image classification models.
| Figures: Integer-only quantized models running on Pixel 4 CPU with 4 threads. |
Challenges: Quantization and heterogeneous hardware
The unique nature of edge devices raises several challenges.Quantization: Since many edge devices have limited floating-point support, quantization is widely used. However, it often requires a complicated quantization-aware training procedure or poor post-training quantization model accuracy.
Thankfully, within our toolkit, we leveraged the , we easily quantized the model without losing much accuracy via integer-only post-training quantization (for more information, see
We found that the issue was caused by the quantized output range being too wide. Quantization was essentially doing affine transformation of the floating-point values to fit into the int8 buckets:
| That's a sign that we may have lost too much accuracy as it was hard to fit the wide-ranged floating tensor into int8 ranged buckets. To address the issue, we replaced the , which is a tool that enables you to apply transfer learning on existing TensorFlow models with a user’s input data and export the resulting model to a TensorFlow Lite format. TensorFlow Lite Model Maker supports multiple model architectures, including MobileNetV2 and all variants of EfficientNet-Lite. Here is an example of how you can build an EfficientNet-Lite0 image classification model with just 5 lines of code: PYTHON Next, let’s build a mobile app with this model. You can start with our to the assets folder. If you want to try out your customized model created with Model Maker, you can replace it in the assets folder. As shown in the screenshot, the EfficientNet-Lite model runs inference in real-time (>= 30 fps). Vollständiger Original-Bericht Ausführliche Details, Code-Beispiele & Hersteller-Stellungnahme auf blog.tensorflow.org. Wie bewertest du diesen Beitrag? 1 Klick Feedback Teilen mit Netzwerk & Team: Hat Ihnen dieser Tipp / Anleitung geholfen? Community-Analysen & Experten-Meinungen 0Verfasse deine eigene Analyse, teile Workarounds oder diskutiere diesen Vorfall im Blog. Noch keine Community-Analyse verfasst. Markiere einen Textabschnitt oder klicke oben auf „ Eigene Analyse verfassen“! Community Pulse: Relevanz-Einschätzung 1 Klick Experten-Votum 🔴 Akute Relevanz 0% 🟡 In Evaluierung 0% 🟢 Keine Auswirkung 0% Spannende Innovation 0% Verwandte Story-Cluster & Quellen (Vektor-KI) Tipp: Mit Pfeiltasten [ ← ] und [ → ] blättern
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