This short program turns a color image into black and white. The user can set the threshold for the RGB value to remove. All pixels with an RGB value higher than that wil be removed. Clicking the BW button will turn the image pure black/white.
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
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175 | import java.awt.*;
import java.awt.event.*;
import java.awt.image.BufferedImage;
import java.io.File;
import javax.imageio.ImageIO;
import javax.swing.*;
import javax.swing.event.*;
public class BWImageMaker extends JFrame{
private BufferedImage bufimage=null;
private ImageIcon icon=null;
private JLabel label=null;
private JScrollBar sbpixel=null;
private JLabel lmessage=null;
private String filepath="";
public BWImageMaker(){
super("BW Image Maker");
setSize(400,500);
JButton bopen=new JButton("Open");
bopen.addActionListener(new ButtonHandler());
JPanel pmain=new JPanel();
label=new JLabel();
pmain.add(label);
lmessage=new JLabel("");
sbpixel=new JScrollBar(JScrollBar.HORIZONTAL,255,0,0,255);
sbpixel.addAdjustmentListener(new ScrollBarHandler());
JButton bbw=new JButton("BW");
bbw.addActionListener(new ButtonHandler());
JButton bsave=new JButton("Save");
bsave.addActionListener(new ButtonHandler());
JPanel pdown=new JPanel();
pdown.setPreferredSize(new Dimension(400,80));
pdown.setLayout(new GridLayout(4,1));
pdown.add(lmessage);
pdown.add(sbpixel);
pdown.add(bbw);
pdown.add(bsave);
setLayout(new BorderLayout());
add("North",bopen);
add("Center",pmain);
add("South",pdown);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
show();
}
class ButtonHandler implements ActionListener{
public void actionPerformed(ActionEvent e){
if(e.getActionCommand()=="Open"){
JFileChooser fc=new JFileChooser();
int val=fc.showOpenDialog(BWImageMaker.this);
if(val==JFileChooser.APPROVE_OPTION) {
filepath=fc.getSelectedFile().getPath();
}
if (filepath!= null){
try{
bufimage=ImageIO.read(new File(filepath));
}catch(Exception ex){
}
icon=new ImageIcon(bufimage);
label.setIcon(icon);
}
sbpixel.setValue(255);
}
if(e.getActionCommand()=="Save"){
JFileChooser fc=new JFileChooser();
int val=fc.showSaveDialog(BWImageMaker.this);
if (val==JFileChooser.APPROVE_OPTION) {
try{
File fileToSave=fc.getSelectedFile();
ImageIO.write(bufimage,"jpg",new File(fileToSave.getName()+".jpg"));
}catch(Exception ex){
}
}
}
if(e.getActionCommand()=="BW"){
if(bufimage==null){
return;
}
int width=bufimage.getWidth();
int height=bufimage.getHeight();
int counter=0;
int pixels[]=new int[width*height];
for(int i=0;i<height;i++){
for(int j=0;j<width;j++){
pixels[counter]=bufimage.getRGB(j,i);
counter++;
}
}
counter=0;
for(int i=0;i<height;i++){
for(int j=0;j<width;j++){
if(pixels[counter]!=-1){
pixels[counter]=0;
bufimage.setRGB(j,i,pixels[counter]);
}
counter++;
}
}
icon=new ImageIcon(bufimage);
label.setIcon(icon);
}
}
}
class ScrollBarHandler implements AdjustmentListener{
public void adjustmentValueChanged(AdjustmentEvent e){
if(e.getSource()==sbpixel){
if(bufimage==null){
return;
}
if(filepath!= null){
try{
bufimage=ImageIO.read(new File(filepath));
}catch(Exception ex){
}
icon=new ImageIcon(bufimage);
label.setIcon(icon);
}
int width=bufimage.getWidth();
int height=bufimage.getHeight();
int counter=0;
int pixels[]=new int[width*height];
for(int i=0;i<height;i++){
for(int j=0;j<width;j++){
pixels[counter]=bufimage.getRGB(j,i);
counter++;
}
}
int pixremoved=sbpixel.getValue();
lmessage.setText("Value: "+pixremoved);
counter=0;
for(int i=0;i<height;i++){
for(int j=0;j<width;j++){
Color c = new Color(pixels[counter]);
int red=c.getRed();
int green=c.getGreen();
int blue=c.getBlue();
if(red>=pixremoved||green>=pixremoved||blue>=pixremoved){
bufimage.setRGB(j,i,-1);
}
else{
bufimage.setRGB(j,i,pixels[counter]);
}
counter++;
}
}
icon=new ImageIcon(bufimage);
label.setIcon(icon);
}
}
}
public static void main(String[] args){
new BWImageMaker();
}
}
|
No comments:
Post a Comment