Java-Elaborazione-delle-immagini/Magnitude.java at main · ManueldG/Java-Elaborazione-delle-immagini · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
import java.awt.*;
import java.awt.image.*;
import java.awt.event.*;

public
class Magnitude extends Canvas {

	private double[]		magnitude;
	private double[]		phase;

	private	double			max_magnitude;
	private	double			min_magnitude;

	private final static int	WIDTH = 280;
	private final static int	HEIGHT = 100;

	public
	Magnitude()
	{
		super();
		setBackground(Color.BLACK);
		setForeground(Color.LIGHT_GRAY);

		this.addMouseListener( new MouseAdapter() {
			public void mousePressed( MouseEvent e ) {
				int	x = e.getX();
				int	y = e.getY();
				double mag = magnitude[x];

				System.out.println( "Magnitude: Magnitude of gray " + x + " :" + mag );
			}
		} );

		setSize( WIDTH, HEIGHT );
	}

	public
	Magnitude( double[][] FFT )
	{
		this();
		compute( FFT );
	}

	public
	void compute( double[][] FFT )
	{
		magnitude = new double[ FFT.length ];
		phase = new double[ FFT.length ];

		max_magnitude = min_magnitude = 0;

		for( int i=1; i < magnitude.length; i++ ) {
			double	mag = FFTUtil.magnitude( FFT[i][0], FFT[i][1] );
			magnitude[i] = mag;

			if ( mag > max_magnitude ) {
				max_magnitude = mag;
			}
			else
			if ( mag < min_magnitude ) {
				min_magnitude = mag;
			}


		}


		System.out.println( "Magnitude: highest magnitude  "+ max_magnitude + " lowest magnitude: " + min_magnitude );

	}

	public
	double  getValueAt( int index )
	{
		return magnitude[index];
	}

	public
	Dimension getMinimumSize()
	{
		return new Dimension( WIDTH, HEIGHT );
	}

	public
	Dimension getPreferredSize() {
		return new Dimension( WIDTH, HEIGHT );
	}

	public
	void paint( Graphics g )
	{
		Dimension	size = getSize();

		int	x_offset = 10;
		int	y_top_value = 50;
		int	x_step = 2;
		int	MAX_ELEM = (size.width - x_offset) / x_step;
		int	yCenter = HEIGHT / 2;

		double scale = ( (double)y_top_value / max_magnitude);

//		g.setColor( Color.BLACK );
//		g.drawRect( 0 + x_offset, 0, size.width - x_offset, HEIGHT );
		g.drawLine( 0, yCenter, size.width, yCenter);

		for( int i = 0; i < size.width; i += 256 )
		{
			int	x = i + x_offset;
			g.drawLine( x, 5 , x, yCenter + 5 );
		}


		g.setColor( Color.YELLOW );


		int	max_elems = magnitude.length;
		if ( max_elems > MAX_ELEM ) max_elems = MAX_ELEM;

//		System.out.println( "Magnitude: yScale " + scale );

		for(int i=0; i < max_elems; i++ ) {
			int	y = (int) (magnitude[i*x_step] * scale);
			int x = x_offset + x_step * i;
			g.drawLine( x, yCenter, x,  yCenter - y);

//			System.out.println( "Magnitude: x: " + x + " y: " +y );

		}

//		System.out.println( "Magnitude: max_elems " + max_elems  );
	}
}