Assignment problem - What am I doing wrong? - kotlin

Question

I am working on image seam carving project, looking for some help. Can someone tell me what am I doing wrong here, Hyperskill is not accepting my solution. I am pretty sure I did not understand the project statement correctly. (I’ve been fighting it for a week)
Project: https://hyperskill.org/projects/100/stages/553/implement
First I am finding the minimum seam from all possible seams.
var minX = 0
// (minSeamX, 0) would be the coordinate of the minimum seam
var minSeamX = 0
var minSeam = Double.MAX_VALUE
//Starting from top left find the sum of pixel energies for all possible seams(#width number of possible seams)
for (column in 0 until width) {
var totalSeam = 0.0
var xHigh = column
var xLow = column
var min = Double.MAX_VALUE
for (y in 0 until height) {
for (x in xLow..xHigh) {
if (x < 0 || x > width - 1) continue
val energy = calculateEnergy(x, y, bufferedImage)
// println("Energy $x $y $energy")
if (energy < min) {
min = energy
minX = x
}
}
totalSeam += min
min = Double.MAX_VALUE
xLow = minX - 1
xHigh = minX + 1
}
if (totalSeam < minSeam) {
minSeamX = column
minSeam = totalSeam
}
println("total:$totalSeam")
}
after that I am applying the color to the minimum seam pixels
var xLow = minSeamX
var xHigh = minSeamX
var min = Double.MAX_VALUE
for (y in 0 until height) {
for (x in xLow..xHigh) {
val energy = calculateEnergy(x, y, bufferedImage)
if (energy < min) {
min = energy
minX = x
}
}
val createGraphics = applyColor(outImage, minX, y)
min = Double.MAX_VALUE
xLow = minX - 1
xHigh = minX + 1
}
Complete code
package seamcarving
import java.awt.Color
import java.awt.Graphics2D
import java.awt.image.BufferedImage
import java.io.File
import javax.imageio.ImageIO
import kotlin.math.pow
import kotlin.math.sqrt
fun main(args: Array<String>) {
val bufferedImage = ImageIO.read(File("/Users/name/Downloads/images/blue.png"))
val outImage = ImageIO.read(File("/Users/name/Downloads/images/blue.png"))
val height = bufferedImage.height
val width = bufferedImage.width
var minX = 0
// (minSeamX, 0) would be the coordinate of the minimum seam
var minSeamX = 0
var minSeam = Double.MAX_VALUE
//Starting from top left find the sum of pixel energies for all possible seams(#width number of possible seams)
for (column in 0 until width) {
var totalSeam = 0.0
var xHigh = column
var xLow = column
var min = Double.MAX_VALUE
for (y in 0 until height) {
for (x in xLow..xHigh) {
if (x < 0 || x > width - 1) continue
val energy = calculateEnergy(x, y, bufferedImage)
// println("Energy $x $y $energy")
if (energy < min) {
min = energy
minX = x
}
}
totalSeam += min
min = Double.MAX_VALUE
xLow = minX - 1
xHigh = minX + 1
}
if (totalSeam < minSeam) {
minSeamX = column
minSeam = totalSeam
}
println("total:$totalSeam")
}
var xLow = minSeamX
var xHigh = minSeamX
var min = Double.MAX_VALUE
for (y in 0 until height) {
for (x in xLow..xHigh) {
val energy = calculateEnergy(x, y, bufferedImage)
if (energy < min) {
min = energy
minX = x
}
}
val createGraphics = applyColor(outImage, minX, y)
min = Double.MAX_VALUE
xLow = minX - 1
xHigh = minX + 1
}
// for (x in 0 until width) {
// for (y in 0 until height) {
// val intensity = ((255.0 * array[x][y]) / max).toInt()
// val color = Color(intensity, intensity, intensity)
//// outputImage.setRGB(x, y, intensity)
// createGraphics.paint = color
// createGraphics.fillRect(x, y, 1, 1)
// }
// }
ImageIO.write(outImage, "png", File("out.png"))
// ImageIO.write(bufferedImage, "png", File("${args[3]}"))
}
private fun applyColor(outputImage: BufferedImage, maxX: Int, maxY: Int): Graphics2D? {
val createGraphics = outputImage.createGraphics()
val color = Color(255, 0, 0)
createGraphics.paint = color
createGraphics.fillRect(maxX, maxY, 1, 1)
return createGraphics
}
private fun calculateEnergy(x: Int, y: Int, bufferedImage: BufferedImage): Double {
return sqrt(getXGradient(x, y, bufferedImage) + getYGradient(x, y, bufferedImage))
}
fun getXGradient(x: Int, y: Int, inImage: BufferedImage): Double {
val width = inImage.width
var xx = x
var yy = y
if (x == 0) xx = 1
if (x == width - 1) xx = x - 1
val lc = Color(inImage.getRGB(xx - 1, yy))
val rc = Color(inImage.getRGB(xx + 1, yy))
return (lc.red - rc.red).toDouble().pow(2.0) + (lc.green - rc.green).toDouble().pow(2.0) + (lc.blue - rc.blue).toDouble().pow(2.0)
}
fun getYGradient(x: Int, y: Int, inImage: BufferedImage): Double {
val height = inImage.height
var xx = x
var yy = y
if (y == 0) yy = 1
if (y == height - 1) yy = y - 1
val lc = Color(inImage.getRGB(xx, yy - 1))
val rc = Color(inImage.getRGB(xx, yy + 1))
return (lc.red - rc.red).toDouble().pow(2.0) + (lc.green - rc.green).toDouble().pow(2.0) + (lc.blue - rc.blue).toDouble().pow(2.0)
}