#python #numpy #opencv #scalapy
Вопрос:
Я пытаюсь загрузить матрицу OpenCV в виде массива NumPy, используя библиотеку ScalaPy, но, похоже, в ней отсутствует неявный писатель, который преобразовывал бы Matrx в массив NumPy. Вот пример кода:
Сначала мой импорт:
import me.shadaj.scalapy.numpy.NumPy import me.shadaj.scalapy.py import org.bytedeco.opencv.global.opencv_imgcodecs.imread import org.bytedeco.opencv.opencv_core.Mat val np: NumPy = py.module("numpy").as[NumPy] def loadImage(imagePath: String) = { // 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 =gt; (preProcessor.preProcess(matrix), label)) val preProcessedImagesWithLabels = Seq(new ImageResizePreProcessor(appCfg)).map(preProcessor =gt; preProcessor.preProcess(matrix)) np.asarray(preProcessedImagesWithLabels) // Fails here as expected } Вот ошибка, с которой я сталкиваюсь:
[error] /home/joesan/Projects/Private/ml-projects/object-classifier/src/main/scala/com/bigelectrons/animalclassifier/ImageLoader.scala:22:7: Symbol 'type me.shadaj.scalapy.py.Writer' is missing from the classpath [error] This symbol is required by 'value me.shadaj.scalapy.numpy.NumPy.writer'. [error] Make sure that type Writer is in your classpath and check for conflicting dependencies with `-Ylog-classpath`. [error] A full rebuild may help if 'NumPy.class' was compiled against an incompatible version of me.shadaj.scalapy.py. [error] np.asarray(preProcessedImagesWithLabels) [error] ^ [error] /home/joesan/Projects/Private/ml-projects/object-classifier/src/main/scala/com/bigelectrons/animalclassifier/ImageLoader.scala:22:17: could not find implicit value for parameter writer: me.shadaj.scalapy.py.Writer[org.bytedeco.opencv.opencv_core.Mat] [error] np.asarray(preProcessedImagesWithLabels) [error] ^ [error] two errors found [error] (Compile / compileIncremental) Compilation failed [error] Total time: 5 s, completed Nov 1, 2021 9:40:45 AM Есть две ошибки, с которыми я сталкиваюсь. Должен ли я иметь неявную реализацию writer, которая знает, как преобразовать мат в массив NumPy? Есть какие-нибудь идеи?