Can you check my Histogram.java? My logic there might be wrong and that's leading to incorrect similarity measurements

Expected output for 'input$\_$files$/$correctfiles$.$txt$\text{'}\text{'}3\text{'}\text{'}1\text{'}"$

$0\mathrm{.}857143$ or $0\mathrm{.}714286$

My output: for 'input$\_$files$/$correctfiles$.$txt$\text{'}\text{'}3\text{'}\text{'}1\text{'}"$

$0\mathrm{.}428571$

import java.util.List;

import java.util.ArrayList;

public class Histogram $\{$

$$ private double$[]$ histogram;

$$ public Histogram$($double$[]$ histogram$)\{$

$$ this.histogram $=$ histogram;

$\}$

$$ public double$[]$ getData$()\{$

$$ return histogram;

$\}$

$$ public boolean isEmpty$()\{$

$$ return histogram $==$ null $||$ histogram.length $==0$;

$\}$

$//$ Method to calculate the similarity score

$$ public double similarity$($Histogram other$)\{$

$$ double similarityScore $=0\mathrm{.}0$;

$$ if $($this$.$histogram.length $!=$ other.histogram.length$)\{$

$$ throw new IllegalArgumentException$("$Histograms must have the same length for comparison."$)$;

$\}$

$$ for $($int i $=0$; i $<$ this.histogram.length; i$++)\{$

$$ similarityScore $+=$ Math.min$($this$.$histogram$[$i$],$ other.histogram$[$i$])$;

$\}$

$$ return similarityScore;

$\}$

$//$ Additional method to split the image into $4$ quarters and calculate histograms for each

$$public static List getQuartersHistogram$($double$[][]$ imagePixels$)\{$

$$ List quarters $=$ new ArrayList$<>()$;

$//$ Divide the image into $4$ quarters $($each $64$x$64)$

$$ for $($int quarter $=0$; quarter $<4$; quarter$++)\{$

$$ double$[][]$ quarterPixels $=$ getQuarterPixels$($imagePixels$,$ quarter$)$;

$$ Histogram quarterHistogram $=$ calculateNormalizedHistogram$($quarterPixels$)$;

$$ quarters.add$($quarterHistogram$)$;

$\}$

$$ return quarters;

$\}$

$$ private static double$[][]$ getQuarterPixels$($double$[][]$ imagePixels, int quarter$)\{$

$$ double$[][]$ quarterPixels $=$ new double$[64][64]$;

$$ int startX $=($quarter $==1||$ quarter $==3)?64$ : $0$;

$$ int startY $=($quarter $==2||$ quarter $==3)?64$ : $0$;

$//$ Copy the $64$x$64$ block of pixels into quarterPixels

$$ for $($int x $=0$; x $<64$; x$++)\{$

$$ for $($int y $=0$; y $<64$; y$++)\{$

$$ quarterPixels$[$x$][$y$]=$ imagePixels$[$startX $+$ x$][$startY $+$ y$]$;

$\}$

$\}$

$$ return quarterPixels;

$\}$

$$ public static Histogram calculateNormalizedHistogram$($double$[][]$ quarterPixels$)\{$

$$ int$[]$ histogram $=$ new int$[256]$; $//$ For $256$ intensity levels

$$ double totalPixels $=64*64$; $//$ Total number of pixels in the quarter

$//$ Ensure the pixel values fall within the $0-255$ range

$$ for $($int x $=0$; x $<64$; x$++)\{$

$$ for $($int y $=0$; y $<64$; y$++)\{$

$$ int pixelValue $=$ Math.min$(255,$ Math.max$(0,($int$)$ quarterPixels$[$x$][$y$]))$;

$$ histogram$[$pixelValue$]++$;

$\}$

$\}$

$//$ Normalize the histogram

$$ double$[]$ normalizedHistogram $=$ new double$[256]$;

$$ for $($int i $=0$; i $<$ histogram.length; i$++)\{$

$$ normalizedHistogram$[$i$]=$ histogram$[$i$]/$ totalPixels;

$\}$

$$ return new Histogram$($normalizedHistogram$)$;

$\}$

$\}$