Percentage difference between images: Difference between revisions
Percentage difference between images (view source)
Revision as of 11:39, 26 January 2018
, 6 years agoAdded Kotlin
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(Added Kotlin) |
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Line 826:
console.log(result);
});</lang>
=={{header|Kotlin}}==
{{trans|Java}}
<lang scala>// version 1.2.10
import java.awt.image.BufferedImage
import java.io.File
import javax.imageio.ImageIO
import kotlin.math.abs
fun getDifferencePercent(img1: BufferedImage, img2: BufferedImage): Double {
val width = img1.width
val height = img1.height
val width2 = img2.width
val height2 = img2.height
if (width != width2 || height != height2) {
val f = "(%d,%d) vs. (%d,%d)".format(width, height, width2, height2)
throw IllegalArgumentException("Images must have the same dimensions: $f")
}
var diff = 0L
for (y in 0 until height) {
for (x in 0 until width) {
diff += pixelDiff(img1.getRGB(x, y), img2.getRGB(x, y))
}
}
val maxDiff = 3L * 255 * width * height
return 100.0 * diff / maxDiff
}
fun pixelDiff(rgb1: Int, rgb2: Int): Int {
val r1 = (rgb1 shr 16) and 0xff
val g1 = (rgb1 shr 8) and 0xff
val b1 = rgb1 and 0xff
val r2 = (rgb2 shr 16) and 0xff
val g2 = (rgb2 shr 8) and 0xff
val b2 = rgb2 and 0xff
return abs(r1 - r2) + abs(g1 - g2) + abs(b1 - b2)
}
fun main(args: Array<String>) {
val img1 = ImageIO.read(File("Lenna50.jpg"))
val img2 = ImageIO.read(File("Lenna100.jpg"))
val p = getDifferencePercent(img1, img2)
println("The percentage difference is ${"%.6f".format(p)}%")
}</lang>
{{out}}
<pre>
The percentage difference is 1.625593%
</pre>
=={{header|Liberty BASIC}}==
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