deeplearning4j/deeplearning4j-examples

Style Transfer error

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#857 opened on May 29, 2019

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 (7 comments) (0 reactions) (0 assignees)Java (2,395 stars) (1,841 forks)batch import
bughelp wanted

Description

Issue Description

Please describe your issue, along with:

  • expected behavior Run until execution finished.

  • encountered behavior Error stops execution.

Stack Trace: Exception in thread "main" java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at com.intellij.rt.execution.CommandLineWrapper.main(CommandLineWrapper.java:66) Caused by: java.lang.RuntimeException: NativeOps::execPairwiseTransform both operands must have same data type; Expected: [DOUBLE]; Actual: [FLOAT] at org.nd4j.nativeblas.Nd4jCuda$NativeOps.execPairwiseTransform(Native Method) at org.nd4j.linalg.jcublas.ops.executioner.CudaExecutioner.invoke(CudaExecutioner.java:1420) at org.nd4j.linalg.jcublas.ops.executioner.CudaExecutioner.exec(CudaExecutioner.java:635) at org.nd4j.linalg.api.ndarray.BaseNDArray.addi(BaseNDArray.java:3818) at org.nd4j.linalg.api.ndarray.BaseNDArray.addi(BaseNDArray.java:3788) at org.deeplearning4j.examples.styletransfer.NeuralStyleTransfer.createCombinationImage(NeuralStyleTransfer.java:192) at org.deeplearning4j.examples.styletransfer.NeuralStyleTransfer.transferStyle(NeuralStyleTransfer.java:132) at org.deeplearning4j.examples.styletransfer.NeuralStyleTransfer.main(NeuralStyleTransfer.java:124) ... 5 more

Version Information

Please indicate relevant versions, including, if relevant:

  • Deeplearning4j version 1.0.0beta4
  • platform information (OS, etc) Windows 10
  • CUDA version, if used 10.1
  • NVIDIA driver version, if in use 430.86

Contributing

If you'd like to help us fix the issue by contributing some code, but would like guidance or help in doing so, please mention it!

Contributor guide

Tech stack
java
Domain
machine learning
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
JavaDeeplearning4j basics
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40
Research direction
The error occurs in NeuralStyleTransfer.java at line 192 in the createCombinationImage method. The issue is a data type mismatch between FLOAT and DOUBLE arrays during an add operation. Investigating the surrounding code and ensuring both arrays are converted to DOUBLE before performing the addition should resolve the bug. Check the comments in the issue for any additional insights from maintainers.