Kotlin BufferedImage extension function to transpose image.

BufferedImage.getTransposed.kt

fun BufferedImage.getTransposed(): BufferedImage {
    val transposeImage = BufferedImage(this.height, this.width, BufferedImage.TYPE_INT_RGB)
    repeat(transposeImage.width) { w ->
        repeat(transposeImage.height) { h ->
            transposeImage.setRGB(w, h, this.getRGB(h, w))
        }
    }
    return transposeImage
}