example-kotlin-repl.kts

import net.imglib2.imklib.*
import net.imglib2.type.volatiles.*
import net.imglib2.type.numeric.integer.*

// pick any data here
val rawData = imklib.io.n5.openUntypedHDF5("/home/zottel/Downloads/sample_A_20160501.hdf", "volumes/raw").asUnsignedBytes()
val rawDataExtended = rawData.extendBorder().asInts()
val gradientMagnitudeData = (0..2)
    .map { d -> LongArray(3) { if (it == d) 1 else 0 } }
    .map { rawDataExtended[rawData + it].zeroMin - rawDataExtended[rawData - it].zeroMin }
    .map { it * it }
    .reduce { d1, d2 -> d1 + d2 }
    .cache()

val res = doubleArrayOf(4.0, 4.0, 40.0)
val off = DoubleArray(3) { 0.0 }

val raw = paintera.baseView.addSingleScaleRawSource<UnsignedByteType, VolatileUnsignedByteType>(
    rawData, res, off, 0.0, 255.0, "raw"
)
val gradientMagnitude = paintera.baseView.addSingleScaleRawSource<IntType, VolatileIntType>(
    gradientMagnitudeData, res, off, 0.0, 2047.0, "gradient magnitude squared"
)