faktel-core/io.github.cybersafetyid.faktel.core.image/GrayImage

GrayImage

class GrayImage(val width: Int, val height: Int, val data: ByteArray)

A packed 8-bit single-channel image.

Constructors

constructor(width: Int, height: Int, data: ByteArray)

Properties

val data: ByteArray

val height: Int

Functions

operator fun get(x: Int, y: Int): Int

Pixel value 0..255 at (x, y).

laplacianVariance

fun GrayImage.laplacianVariance(): Double

Focus measure: variance of the 4-neighbour Laplacian. Higher is sharper.

fun GrayImage.meanBrightness(): Double

Mean luma in 0.0..255.0.