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java代码制作动态视频 java做一个动态图片
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JAVA 将照片转视频且有动画效果
感觉这应该是前端页面的功能吧，不是后端做的事情。是让照片以幻灯片的方式呈现，这是纯页面效果，后台只负责推送数据，怎么展现是前端的活了吧。
新手学习使用Java，尝试着做一个项目使用Java做一个视频图像的处理。
Java图像处理技巧四则
下面代码中用到的sourceImage是一个已经存在的Image对象
图像剪切
对于一个已经存在的Image对象，要得到它的一个局部图像，可以使用下面的步骤：
//import java.awt.*;
//import java.awt.image.*;
Image croppedImage;
ImageFilter cropFilter;
CropFilter =new CropImageFilter(25,30,75,75); //四个参数分别为图像起点坐标和宽高，即CropImageFilter(int x,int y,int width,int height)，详细情况请参考API
CroppedImage= Toolkit.getDefaultToolkit().createImage(new FilteredImageSource(sourceImage.getSource(),cropFilter));
如果是在Component的子类中使用，可以将上面的Toolkit.getDefaultToolkit().去掉。FilteredImageSource是一个ImageProducer对象。
图像缩放
对于一个已经存在的Image对象，得到它的一个缩放的Image对象可以使用Image的getScaledInstance方法：
Image scaledImage=sourceImage. getScaledInstance(100,100, Image.SCALE_DEFAULT); //得到一个100X100的图像
Image doubledImage=sourceImage. getScaledInstance(sourceImage.getWidth(this)*2,sourceImage.getHeight(this)*2, Image.SCALE_DEFAULT); //得到一个放大两倍的图像,这个程序一般在一个swing的组件中使用，而类Jcomponent实现了图像观察者接口ImageObserver，所有可以使用this。
//其它情况请参考API
灰度变换
下面的程序使用三种方法对一个彩色图像进行灰度变换，变换的效果都不一样。一般而言，灰度变换的算法是将象素的三个颜色分量使用R*0.3+G*0.59＋ B*0.11得到灰度值，然后将之赋值给红绿蓝，这样颜色取得的效果就是灰度的。另一种就是取红绿蓝三色中的最大值作为灰度值。java核心包也有一种算法，但是没有看源代码，不知道具体算法是什么样的，效果和上述不同。
/* GrayFilter.java*/
/*@author:cherami */
/*email:cherami@163.net*/
import java.awt.image.*;
public class GrayFilter extends RGBImageFilter {
int modelStyle;
public GrayFilter() {
modelStyle=GrayModel.CS_MAX;
canFilterIndexColorModel=true;
}
public GrayFilter(int style) {
modelStyle=style;
canFilterIndexColorModel=true;
}
public void setColorModel(ColorModel cm) {
if (modelStyle==GrayModel
else if (modelStyle==GrayModel
}
public int filterRGB(int x,int y,int pixel) {
return pixel;
}
}
/* GrayModel.java*/
/*@author:cherami */
/*email:cherami@163.net*/
import java.awt.image.*;
public class GrayModel extends ColorModel {
public static final int CS_MAX=0;
public static final int CS_FLOAT=1;
ColorModel sourceModel;
int modelStyle;
public GrayModel(ColorModel sourceModel) {
super(sourceModel.getPixelSize());
this.sourceModel=sourceModel;
modelStyle=0;
}
public GrayModel(ColorModel sourceModel,int style) {
super(sourceModel.getPixelSize());
this.sourceModel=sourceModel;
modelStyle=style;
}
public void setGrayStyle(int style) {
modelStyle=style;
}
protected int getGrayLevel(int pixel) {
if (modelStyle==CS_MAX) {
return Math.max(sourceModel.getRed(pixel),Math.max(sourceModel.getGreen(pixel),sourceModel.getBlue(pixel)));
}
else if (modelStyle==CS_FLOAT){
return (int)(sourceModel.getRed(pixel)*0.3+sourceModel.getGreen(pixel)*0.59+sourceModel.getBlue(pixel)*0.11);
}
else {
return 0;
}
}
public int getAlpha(int pixel) {
return sourceModel.getAlpha(pixel);
}
public int getRed(int pixel) {
return getGrayLevel(pixel);
}
public int getGreen(int pixel) {
return getGrayLevel(pixel);
}
public int getBlue(int pixel) {
return getGrayLevel(pixel);
}
public int getRGB(int pixel) {
int gray=getGrayLevel(pixel);
return (getAlpha(pixel)24)+(gray16)+(gray8)+gray;
}
}
如果你有自己的算法或者想取得特殊的效果，你可以修改类GrayModel的方法getGrayLevel()。
色彩变换
根据上面的原理，我们也可以实现色彩变换，这样的效果就很多了。下面是一个反转变换的例子：
/* ReverseColorModel.java*/
/*@author:cherami */
/*email:cherami@163.net*/
import java.awt.image.*;
public class ReverseColorModel extends ColorModel {
ColorModel sourceModel;
public ReverseColorModel(ColorModel sourceModel) {
super(sourceModel.getPixelSize());
this.sourceModel=sourceModel;
}
public int getAlpha(int pixel) {
return sourceModel.getAlpha(pixel);
}
public int getRed(int pixel) {
return ~sourceModel.getRed(pixel);
}
public int getGreen(int pixel) {
return ~sourceModel.getGreen(pixel);
}
public int getBlue(int pixel) {
return ~sourceModel.getBlue(pixel);
}
public int getRGB(int pixel) {
return (getAlpha(pixel)24)+(getRed(pixel)16)+(getGreen(pixel)8)+getBlue(pixel);
}
}
/* ReverseColorModel.java*/
/*@author:cherami */
/*email:cherami@163.net*/
import java.awt.image.*;
public class ReverseFilter extends RGBImageFilter {
public ReverseFilter() {
canFilterIndexColorModel=true;
}
public void setColorModel(ColorModel cm) {
substituteColorModel(cm,new ReverseColorModel(cm));
}
public int filterRGB(int x,int y,int pixel) {
return pixel;
}
}
要想取得自己的效果，需要修改ReverseColorModel.java中的三个方法，getRed、getGreen、getBlue。
下面是上面的效果的一个总的演示程序。
/*GrayImage.java*/
/*@author:cherami */
/*email:cherami@163.net*/
import java.awt.*;
import java.awt.image.*;
import javax.swing.*;
import java.awt.color.*;
public class GrayImage extends JFrame{
Image source,gray,gray3,clip,bigimg;
BufferedImage bimg,gray2;
GrayFilter filter,filter2;
ImageIcon ii;
ImageFilter cropFilter;
int iw,ih;
public GrayImage() {
ii=new ImageIcon(\"images/11.gif\");
source=ii.getImage();
iw=source.getWidth(this);
ih=source.getHeight(this);
filter=new GrayFilter();
filter2=new GrayFilter(GrayModel.CS_FLOAT);
gray=createImage(new FilteredImageSource(source.getSource(),filter));
gray3=createImage(new FilteredImageSource(source.getSource(),filter2));
cropFilter=new CropImageFilter(5,5,iw-5,ih-5);
clip=createImage(new FilteredImageSource(source.getSource(),cropFilter));
bigimg=source.getScaledInstance(iw*2,ih*2,Image.SCALE_DEFAULT);
MediaTracker mt=new MediaTracker(this);
mt.addImage(gray,0);
try {
mt.waitForAll();
} catch (Exception e) {
}
求java做动画代码
import java.awt.Canvas;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.RenderingHints;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
public class TestImage extends Frame
{
private static final long serialVersionUID = 1L;
private static boolean PRESSED = false;
private static int pointX = 0;
private static int pointy = 200;
private static int RIGHT_GO = 0;
private static int LEFT_GO = 0;
private static int DIR = 0;
private static int ANGLE = 0;
private static int W = 50;
private static int H = 60;
private _Canvas canvas = null;
public TestImage ()
{
add (canvas = new _Canvas ());
setIgnoreRepaint (true);
requestFocus ();
}
public class _Canvas extends Canvas implements Runnable
{
private static final long serialVersionUID = 1L;
private BufferedImage bi = null;
private Image bufferedImage = null;
private Thread thread = null;
private long sleepTime = 10;
public _Canvas ()
{
try
{
bi = ImageIO.read (new File ("go.png"));
}
catch (IOException e)
{}
setBackground (Color.BLACK);
requestFocus ();
addKeyListener (new KeyListener ()
{
@Override
public void keyTyped ( KeyEvent e )
{}
@Override
public void keyReleased ( KeyEvent e )
{
RIGHT_GO = 0;
PRESSED = false;
}
@Override
public void keyPressed ( KeyEvent e )
{
// 38 40 37 39上下左右
DIR = e.getKeyCode ();
PRESSED = true;
}
});
}
@Override
public void paint ( Graphics g )
{
Graphics2D g2d = (Graphics2D) g;
g2d.setRenderingHint (RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g2d.drawImage (rotateImage (bi.getSubimage (RIGHT_GO, LEFT_GO, W, H), ANGLE, true), pointX, pointy, W, H,
this);
g2d.dispose ();
}
@Override
public void update ( Graphics g )
{
if (null == bufferedImage)
{
bufferedImage = createImage (getWidth (), getHeight ());
}
Graphics bufferedG = bufferedImage.getGraphics ();
bufferedG.clearRect (0, 0, getWidth (), getHeight ());
paint (bufferedG);
bufferedG.dispose ();
g.drawImage (bufferedImage, 0, 0, this);
g.dispose ();
}
public void start ()
{
thread = new Thread (this);
thread.setName ("TestImage");
thread.setPriority (Thread.MIN_PRIORITY);
thread.start ();
}
public synchronized void stop ()
{
thread = null;
notify ();
}
@Override
public void run ()
{
Thread me = Thread.currentThread ();
while (thread == me !isShowing () || getSize ().width == 0)
{
try
{
Thread.sleep (555);
}
catch (InterruptedException e)
{
return;
}
}
while (thread == me isShowing ())
{
if (PRESSED)
{
try
{
if (DIR == 39)
{
RIGHT_GO = RIGHT_GO + 50;
LEFT_GO = 0;
pointX = pointX + 1;
if (pointX 420)
{
ANGLE = 90;
pointX--;
pointy--;
W = 60;
H = 50;
}
if (RIGHT_GO 50)
{
RIGHT_GO = 0;
}
}
else if (DIR == 37)
{
pointX = pointX - 1;
RIGHT_GO = RIGHT_GO + 50;
LEFT_GO = 60;
if (pointX 0)
{
ANGLE = -90;
pointX++;
pointy--;
W = 60;
H = 50;
}
if (RIGHT_GO 50)
{
RIGHT_GO = 0;
}
}
else if (DIR == 38)
{
W = 50;
H = 60;
pointy = 150;
ANGLE = 0;
RIGHT_GO = 100;
}
else if (DIR == 40)
{
W = 50;
H = 60;
ANGLE = 0;
pointy = 200;
RIGHT_GO = 0;
}
Thread.sleep (sleepTime);
repaint ();
}
catch (InterruptedException e)
{
break;
}
}
else
{
RIGHT_GO = RIGHT_GO + 50;
LEFT_GO = 0;
pointX = pointX + 1;
if (RIGHT_GO 50)
{
RIGHT_GO = 0;
}
if (pointX 500)
{
pointX = 0;
}
try
{
Thread.sleep (sleepTime);
repaint ();
}
catch (InterruptedException e)
{
break;
}
}
}
thread = null;
}
}
/**
* 旋转图像为指定角度
*
* @param degree
* @return
*/
public static BufferedImage rotateImage ( final BufferedImage image, final int angdeg, final boolean d )
{
int w = image.getWidth ();
int h = image.getHeight ();
int type = image.getColorModel ().getTransparency ();
BufferedImage img;
Graphics2D graphics2d;
( graphics2d = ( img = new BufferedImage (w, h, type) ).createGraphics () ).setRenderingHint (
RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
graphics2d.rotate (d ? -Math.toRadians (angdeg) : Math.toRadians (angdeg), w / 2, h / 2);
graphics2d.drawImage (image, 0, 0, null);
graphics2d.dispose ();
return img;
}
public static void main ( String[] args )
{
EventQueue.invokeLater (new Runnable ()
{
@Override
public void run ()
{
final TestImage ti = new TestImage ();
ti.setSize (new Dimension (500, 300));
ti.setLocationRelativeTo (null);
ti.addWindowListener (new WindowAdapter ()
{
@Override
public void windowClosing ( WindowEvent e )
{
System.exit (0);
}
@Override
public void windowDeiconified ( WindowEvent e )
{
ti.canvas.start ();
}
@Override
public void windowIconified ( WindowEvent e )
{
ti.canvas.stop ();
}
});
ti.setResizable (false);
ti.canvas.start ();
ti.setVisible (true);
}
});
}
}
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