像素点运算java源代码 像素点运算java源代码是什么

java 中如何获取 Panel 上某个像素点的 颜色

java中获取Panel上某个像素点的像素颜色，代码如下：

public static void main(String[] args) {

//创建一个150*150，RGB高彩图，类型可自定

BufferedImage img=new BufferedImage(150, 150, BufferedImage.TYPE_INT_rgb);

//取得图形

Graphics g=img.getGraphics();

//设置黑色（black）

g.setColor(Color.BLACK);

//填充颜色

g.fillRect(0, 0, img.getWidth(), img.getHeight());

//在D盘创建个一个png格式图片

File file=new File("D:/zhidao.png");

try{

        //以png方式写入，可改成jpg、gif等其它后缀图片

ImageIO.write(img, "PNG", file);

    }catch (IOException e){

e.printStackTrace();

}

//D盘上就生成了一个zhidao.png的黑色图片

}

         

      

(Java程序题)输入一个5*5的矩阵(图片), 矩阵边的像素点值不变, 我的代码在下面，结果运行不行？

首先像素点运算java源代码你判断定位像素点运算java源代码的条件错了，还有就是你想输出4.2 4.8 这样的小数，你用int类型绝对会都输出4

如何用java编程实现提取一张图像每个像素点的灰度，并且按顺序输出为一串数字代码？

用个HashMap存储信息到文件像素点运算java源代码，可以像素点运算java源代码的话那么代码如下:

import java.util.*

import java.io.*

public class Test1

用java将二进制黑白像素点，画在正方形中

import java.applet.*;

import java.awt.*;

import java.awt.geom.*;

public class Text extends Applet

{

public void paint(Graphics g)

{

g.drawRect(0 ,0, 28,28);//画正方形

g.drawLine(3, 3, 9, 3);

g.drawLine(3, 3, 3, 9);

g.drawLine(5, 5, 9, 5);

g.drawLine(5, 5, 5, 9);

g.drawLine(7, 7, 9, 7);

g.drawLine(7, 7, 7, 9);

g.drawLine(8, 8, 9, 8);

g.drawLine(8, 8, 8 ,9);

g.drawLine(9, 9, 9, 9);

g.drawLine(25,3, 19, 3);

g.drawLine(25,3, 25,9);

g.drawLine(23,5, 19, 5);

g.drawLine(23,5, 23,9);

g.drawLine(21,7, 19, 7);

g.drawLine(21,7, 21,9);

g.drawLine(20,8, 19, 8);

g.drawLine(20,8, 20,9);

g.drawLine(19,9,19,9);

g.drawLine(3, 25, 5,25);

g.drawLine(3, 25, 3,23);

g.drawLine(4, 25, 5,25);

g.drawLine(4, 25, 4,23);

g.drawLine(5, 25, 5,25);

g.drawLine(5, 25, 5,23);

g.drawLine(7, 25, 7,21);

g.drawLine(3, 21, 7,21);

g.drawLine(9,25, 9,19);

g.drawLine(9,19,3,19);

g.drawLine(25,25,25,19);

g.drawLine(25,25,19,25);

g.drawLine(23,23,23,19);

g.drawLine(23,23,19,23);

g.drawLine(21,21,21,19);

g.drawLine(21,21,19,21);

g.drawLine(20,20,20,19);

g.drawLine(20,20,19,20);

g.drawLine(19,19,19,19);//画四个角的寻像图像

char[] c={1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};

//输入一char型的字符串，实际上应该由程序1中获得

{

int j=3;

int i=12;

{

for (int n=0;n=4;n++)

switch (c[n])

{

case(1):

g.drawLine(n+i,j,n+i,j);

}

}

}//如果a[n]为1，则在正方形中画一个黑色像素点，i，j分别为正方形的横.纵坐标

//正方形是23*23像素的，一行画完了接着画下一行，底下的全是重复的画点程序，是按一行一行画的

{

int j=4;

int i=12;

{

for (int n=5;n=9;n++)

switch (c[n])

{

case(1):

g.drawLine(n-5+i,j,n-5+i,j);

}

}

}

{

int j=5;

int i=12;

{

for (int n=10;n=14;n++)

switch (c[n])

{

case(1):

g.drawLine(n-10+i,j,n-10+i,j);

}

}

}

{

int j=6;

int i=12;

{

for (int n=15;n=19;n++)

switch (c[n])

{

case(1):

g.drawLine(n-15+i,j,n-15+i,j);

}

}

}

{

int j=7;

int i=12;

{

for (int n=20;n=24;n++)

switch (c[n])

{

case(1):

g.drawLine(n-20+i,j,n-20+i,j);

}

}

}

{

int j=8;

int i=12;

{

for (int n=25;n=29;n++)

switch (c[n])

{

case(1):

g.drawLine(n-25+i,j,n-25+i,j);

}

}

}

{

int j=9;

int i=12;

{

for (int n=30;n=34;n++)

switch (c[n])

{

case(1):

g.drawLine(n-30+i,j,n-30+i,j);

}

}

}

{

int j=10;

int i=12;

{

for (int n=35;n=39;n++)

switch (c[n])

{

case(1):

g.drawLine(n-35+i,j,n-35+i,j);

}

}

}

{

int j=11;

int i=12;

{

for (int n=40;n=44;n++)

switch (c[n])

{

case(1):

g.drawLine(n-40+i,j,n-40+i,j);

}

}

}

{

int j=12;

int i=3;

{

for (int n=45;n=67;n++)

switch (c[n])

{

case(1):

g.drawLine(n-45+i,j,n-45+i,j);

}

}

}

{

int j=13;

int i=3;

{

for (int n=68;n=90;n++)

switch (c[n])

{

case(1):

g.drawLine(n-68+i,j,n-68+i,j);

}

}

}

{

int j=14;

int i=3;

{

for (int n=91;n=113;n++)

switch (c[n])

{

case(1):

g.drawLine(n-91+i,j,n-91+i,j);

}

}

}

{

int j=15;

int i=3;

{

for (int n=114;n=136;n++)

switch (c[n])

{

case(1):

g.drawLine(n-114+i,j,n-114+i,j);

}

}

}

{

int j=16;

int i=3;

{

for (int n=137;n=159;n++)

switch (c[n])

{

case(1):

g.drawLine(n-137+i,j,n-137+i,j);

}

}

}

{

int j=17;

int i=12;

{

for (int n=160;n=164;n++)

switch (c[n])

{

case(1):

g.drawLine(n-160+i,j,n-160+i,j);

}

}

}

{

int j=18;

int i=12;

{

for (int n=165;n=169;n++)

switch (c[n])

{

case(1):

g.drawLine(n-165+i,j,n-165+i,j);

}

}

}

{

int j=19;

int i=12;

{

for (int n=170;n=174;n++)

switch (c[n])

{

case(1):

g.drawLine(n-170+i,j,n-170+i,j);

}

}

}

{

int j=20;

int i=12;

{

for (int n=175;n=179;n++)

switch (c[n])

{

case(1):

g.drawLine(n-175+i,j,n-175+i,j);

}

}

}

{

int j=21;

int i=12;

{

for (int n=180;n=184;n++)

switch (c[n])

{

case(1):

g.drawLine(n-180+i,j,n-180+i,j);

}

}

}

{

int j=22;

int i=12;

{

for (int n=185;n=189;n++)

switch (c[n])

{

case(1):

g.drawLine(n-185+i,j,n-185+i,j);

}

}

}

{

int j=23;

int i=12;

{

for (int n=190;n=194;n++)

switch (c[n])

{

case(1):

g.drawLine(n-190+i,j,n-190+i,j);

}

}

}

{

int j=24;

int i=12;

{

for (int n=195;n=199;n++)

switch (c[n])

{

case(1):

g.drawLine(n-195+i,j,n-195+i,j);

}

}

}

{

int j=25;

int i=12;

{

for (int n=0;n=4;n++)

switch (c[n])

{

case(1):

g.drawLine(n+i,j,n+i,j);

}

}

}

/*char b[]={0,0,0,1,0,1,0,1,0,0,0,0,0,0,0,0,0};

{

int j=11;

int i=3;

{

for (int n=0;n=9;n++)

switch (b[n])

{

case(1):

g.drawLine(n+i,j,n+i,j);

}

}

}

{

int j=25;

int i=11;

{

for (int n=0;n=9;n++)

switch (b[n])

{

case(1):

g.drawLine(i,j-n,i,j-n);

}

}

}*/

}

}

关于通过java获取图片像素点时出现 java.lang.OutOfMemoryError: Java heap space 问题

没有发现好像素点运算java源代码的办法像素点运算java源代码，不过可以试一下调整eclipse jvm内存。

设置 eclipse.ini 加入下面选项

-vmargs

-Xms128M

-Xmx512M

-XX:PermSize=64M

-XX:MaxPermSize=128M

你可以根据具体情况修改那些数字。

当然还有其他办法调整eclipse jvm内存，也要根据你使用的eclipse 来调整。

Java如何读取BMP的每个像素点，输出到一个二维数组

楼上的基本正确，

问题一：

int[] rgb = new int[3];最好用二维数组

int[] rgb = new int[3][width*height]

问题二：

rgb[0] = (pixel 0xff0000 ) 16 ;

rgb[1] = (pixel 0xff00 ) 8 ;

rgb[2] = (pixel 0xff );

会把数组内的值覆盖，获得就是最后像素点的RGB值；

我写了一个希望可以帮助到你

package imageReadAndWrite;

import java.awt.image.BufferedImage;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import com.sun.image.codec.jpeg.JPEGCodec;

import com.sun.image.codec.jpeg.JPEGImageDecoder;

import com.sun.image.codec.jpeg.JPEGImageEncoder;

/**

* JPG File reader/writer. Uses native com.sun libraries (which may deprecate at

* any time)

*

*

* @author PhoenixZJG

* @version 1.0

*/

public class JPGFile implements xxxFile {

private int[] ints = null;

private byte bytes[] = null; // bytes which make up binary PPM image

private double doubles[] = null;

private int[][] imageRGB = null;

private String filename = null; // filename for PPM image

private int height = 0;

private int width = 0;

/**

* Read the PPM File.

*

* @throws FileNotFoundException

* if the directory/image specified is wrong

* @throws IOException

* if there are problems reading the file.

*/

public JPGFile(String filename) throws FileNotFoundException, IOException {

this.filename = filename;

readImage();

}

/**

* Get the height of the PPM image.

*

* @return the height of the image.

*/

public int getHeight() {

return height;

}

/**

* Get the width of the PPM image.

*

* @return the width of the image.

*/

public int getWidth() {

return width;

}

/**

* Get the data as byte array. Data is of any type that has been read from

* the file (usually 8bit RGB)

*

* @return The data of the image.

*/

public byte[] getBytes() {

return bytes;

}

/**

* Get the data as double array. Data is of any type that has been read from

* the file (usually 8bit RGB put into an 64bit double)

*

* @return The data of the image.

*/

public double[] getDouble() {

return doubles;

}

/**

* Get the data as double array. Data is of any type that has been read from

* the file (usually 8bit RGB put into an 64bit double)

*

* @return The data of the image.

*/

public int[] getInt() {

return ints;

}

/**

* Get the data as integer array. Data is of any type that has been read from

* the file (usually 8bit RGB put into an 64bit double)

*

* @return The data of the image.

*/

public int[][] getImageRGB() {

return imageRGB;

}

/**

* Write to codefn/code file the codedata/code using the

* codewidth, height/code variables. Data is assumed to be 8bit RGB.

*

* @throws FileNotFoundException

* if the directory/image specified is wrong

* @throws IOException

* if there are problems reading the file.

*/

public static void writeImage(String fn, int[] data, int width, int height)

throws FileNotFoundException, IOException {

FileOutputStream fOut = new FileOutputStream(fn);

JPEGImageEncoder jpeg_encode = JPEGCodec.createJPEGEncoder(fOut);

BufferedImage image = new BufferedImage(width, height,

BufferedImage.TYPE_INT_RGB);

image.setRGB(0, 0, width, height, data, 0, width);

jpeg_encode.encode(image);

fOut.close();

}

/**

* Read the image from the specified file.

*

* @throws FileNotFoundException

* pretty obvious

* @throws IOException

* filesystem related problems

*/

private void readImage() throws FileNotFoundException, IOException {

FileInputStream fIn = new FileInputStream(filename);

JPEGImageDecoder jpeg_decode = JPEGCodec.createJPEGDecoder(fIn);

BufferedImage image = jpeg_decode.decodeAsBufferedImage();

width = image.getWidth();

height = image.getHeight();

int[] rgbdata = new int[width * height];

image.getRGB(0, 0, width, height, rgbdata, 0, width);

ints = rgbdata;

bytes = new byte[rgbdata.length];

doubles = new double[rgbdata.length];

imageRGB = new int[3][rgbdata.length];

for (int i = 0; i bytes.length; i++) {

bytes[i] = (byte) (rgbdata[i] 0xFF);

doubles[i] = (double) (rgbdata[i]);

imageRGB[0][i] = (rgbdata[i] 16711680) 16;

imageRGB[1][i] = (rgbdata[i] 65280) 8;

imageRGB[2][i] = (rgbdata[i] 255);

}

}

}

上述代码可以复制，粘贴使用，有方法的注视，getImageRGB() 就可以获得所有像素的RGB值，你就可以在其他方法里处理这个二维数组，得到你想要的平均值了，处理后的值，记得把值逆运算，再转换到Int[]里，就可以用，writeImage（）输出图像了。

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