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将Java中的OpenCV Mat转换为Scala中的NumPy数组

scalapy opencv numpy scala

0

joesan · 技术社区 · 4 年前

我在Scala中有一个示例代码库,我使用OpenCV和ScalaPy进行一些图像分类。以下是代码位:

def loadImage(imagePath: String): Image = {
  // 0. Load the image and extract class label where a path to the image is assumed to be
  // /path/to/dataset/{class}/{image}.jpg
  val matrix: Mat = imread(imagePath)
  val label = imagePath.split("")

  // 1. Run the loaded image through the preprocessors, resulting in a feature vector
  //val preProcessedImagesWithLabels = Seq(new ImageResizePreProcessor(appCfg)).map(preProcessor => (preProcessor.preProcess(matrix), label))
  val preProcessedImagesWithLabels = Seq(new ImageResizePreProcessor(appCfg)).map(preProcessor => preProcessor.preProcess(matrix))
  np.asarray(preProcessedImagesWithLabels)
}

然而,它失败的原因是找不到NumPy的隐式转换器:

[error] /home/joesan/Projects/Private/ml-projects/object-classifier/src/main/scala/com/bigelectrons/animalclassifier/ImageLoader.scala:10:34: not found: type NumPy
[error]   val np = py.module("numpy").as[NumPy]

除了进口之外,预计还有什么?

  "me.shadaj" %% "scalapy-numpy" % "0.1.0",
"me.shadaj" %% "scalapy-core" % "0.5.0",

0 回复 | 直到 4 年前

1

gianluca aguzzi 4 年前

尝试使用scalapy-numpy的最新“dev”版本: 0.1.0+6-14ca0424

因此,请更改sbt内置:

libraryDependencies += "me.shadaj" %% "scalapy-numpy" % "0.1.0+6-14ca0424"

我尝试在菊石这个脚本:

import me.shadaj.scalapy.numpy.NumPy 
import me.shadaj.scalapy.py 

val np = py.module("numpy").as[NumPy]

似乎找到了 NumPy 如预期