Example of Java method to add image watermark text watermark and Mosaic to image
- 2021-01-03 20:53:46
- OfStack
This paper introduces the method of Java to add image watermark, text watermark and Mosaic. To share for your reference, the details are as follows:
You can create a new Utils class in eclipse and copy the following code into it for direct use. The following method adds a single or multiple watermarks
package com.rzxt.fyx.common.util;
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import java.io.File;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
/**
* Add a watermark to an image
* @author tgy
*
*/
public class MarkImageUtils {
/**
* @param args
*/
public static void main(String[] args) {
String output = "F:/images/";
String source = "F:/images/6.jpg"; // Source image path
String icon = "F:/images/icon2.png"; // Overlay image path
String imageName = "mark_image"; // Image name
String imageType = "jpg"; // Image type jpg,jpeg,png,gif
String text = " The watermarking ";
int size = 4; // Mosaic size
Integer degree = null; // Watermark rotation Angle -45 . null Means no rotation
String result = null;
// Add image watermark to the image
result = MarkImageUtils.markImageByMoreIcon(icon,source,output,imageName,imageType,degree);
// result = MarkImageUtils.markImageBySingleIcon(icon, source, output, imageName, imageType, degree);
// // Add a text watermark to an image
// result = MarkImageUtils.markImageByMoreText(source,output,imageName,imageType,Color.red,text,degree);
// result = MarkImageUtils.markImageBySingleText(source,output,imageName,imageType,Color.red,text,degree);
// // Make a Mosaic of the picture
// result = MarkImageUtils.markImageByMosaic(source,output,imageName,imageType,size);
System.out.println(result);
}
/**
* Add multiple image watermarks to different positions of the image, and set the rotation Angle of the watermark image
* @param icon Watermark image path (such as: F:/images/icon.png )
* @param source Path to image without watermark (for example: F:/images/6.jpg )
* @param output Watermark image path (such as: F:/images/ )
* @param imageName Picture name (e.g. : 11111 )
* @param imageType Picture type (e.g. : jpg )
* @param degree The watermark image rotation Angle, is null Means no rotation
*/
public static String markImageByMoreIcon(String icon,String source,String output,String imageName,String imageType,Integer degree) {
String result = " Error adding image watermark ";
try {
File file = new File(source);
File ficon = new File(icon);
if (!file.isFile()) {
return source + " not 1 A picture file !";
}
// will icon Load into memory
Image ic = ImageIO.read(ficon);
//icon highly
int icheight = ic.getHeight(null);
// Read the source image into memory
Image img = ImageIO.read(file);
// Image width
int width = img.getWidth(null);
// Pictures of high
int height = img.getHeight(null);
BufferedImage bi = new BufferedImage(width,height,BufferedImage.TYPE_INT_RGB);
// create 1 A specified BufferedImage the Graphics2D object
Graphics2D g = bi.createGraphics();
//x,y Axis default is from 0 Coordinate began
int x = 0;
int y = 0;
// The default height between two watermark images is the watermark image 1/3
int temp = icheight/3;
int space = 1;
if(height>=icheight){
space = height/icheight;
if(space>=2){
temp = y = icheight/2;
if(space==1||space==0){
x = 0;
y = 0;
}
}
}else{
x = 0;
y = 0;
}
// Set jagged edge handling for line segments
g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,RenderingHints.VALUE_INTERPOLATION_BILINEAR);
// present 1 The image is converted from image space to user space before drawing
g.drawImage(img.getScaledInstance(width,height,Image.SCALE_SMOOTH),0,0,null);
for(int i=0;i<space;i++){
if (null != degree) {
// Set watermark rotation
g.rotate(Math.toRadians(degree),(double) bi.getWidth() / 2, (double) bi.getHeight() / 2);
}
// The path of the watermark image The watermark 1 As for the gif or png , so you can set the transparency
ImageIcon imgIcon = new ImageIcon(icon);
// get Image Object.
Image con = imgIcon.getImage();
// Transparency, minimum 0 , the maximum value is 1
float clarity = 0.6f;
g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,clarity));
// Represents the coordinate position of the watermark image (x,y)
//g.drawImage(con, 300, 220, null);
g.drawImage(con, x, y, null);
g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER));
y+=(icheight+temp);
}
g.dispose();
File sf = new File(output, imageName+"."+imageType);
ImageIO.write(bi, imageType, sf); // Save the picture
result = " Add the picture Icon The watermark ";
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
/**
* Add a single image watermark to the image, can set the watermark image rotation Angle
* @param icon Watermark image path (such as: F:/images/icon.png )
* @param source Path to image without watermark (for example: F:/images/6.jpg )
* @param output Watermark image path (such as: F:/images/ )
* @param imageName Picture name (e.g. : 11111 )
* @param imageType Picture type (e.g. : jpg )
* @param degree The watermark image rotation Angle, is null Means no rotation
*/
public static String markImageBySingleIcon(String icon,String source,String output,String imageName,String imageType,Integer degree) {
String result = " Error adding image watermark ";
try {
File file = new File(source);
File ficon = new File(icon);
if (!file.isFile()) {
return source + " not 1 A picture file !";
}
// will icon Load into memory
Image ic = ImageIO.read(ficon);
//icon highly
int icheight = ic.getHeight(null);
// Read the source image into memory
Image img = ImageIO.read(file);
// Image width
int width = img.getWidth(null);
// Pictures of high
int height = img.getHeight(null);
BufferedImage bi = new BufferedImage(width,height,BufferedImage.TYPE_INT_RGB);
// create 1 A specified BufferedImage the Graphics2D object
Graphics2D g = bi.createGraphics();
//x,y Axis default is from 0 Coordinate began
int x = 0;
int y = (height/2)-(icheight/2);
// Set jagged edge handling for line segments
g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,RenderingHints.VALUE_INTERPOLATION_BILINEAR);
// present 1 The image is converted from image space to user space before drawing
g.drawImage(img.getScaledInstance(width,height,Image.SCALE_SMOOTH),0,0,null);
if (null != degree) {
// Set watermark rotation
g.rotate(Math.toRadians(degree),(double) bi.getWidth() / 2, (double) bi.getHeight() / 2);
}
// The path of the watermark image The watermark 1 As for the gif or png , so you can set the transparency
ImageIcon imgIcon = new ImageIcon(icon);
// get Image Object.
Image con = imgIcon.getImage();
// Transparency, minimum 0 , the maximum value is 1
float clarity = 0.6f;
g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,clarity));
// Represents the coordinate position of the watermark image (x,y)
//g.drawImage(con, 300, 220, null);
g.drawImage(con, x, y, null);
g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER));
g.dispose();
File sf = new File(output, imageName+"."+imageType);
ImageIO.write(bi, imageType, sf); // Save the picture
result = " Add the picture Icon The watermark ";
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
/**
* Add multiple text watermarks to the image and set the rotation Angle of the watermark
* @param source The image path to which the watermark is to be added (for example: F:/images/6.jpg )
* @param outPut After adding watermark, the image output path (such as: F:/images/ )
* @param imageName Picture name (e.g. : 11111 )
* @param imageType Picture type (e.g. : jpg )
* @param color The color of the watermark
* @param word Watermark text
* @param degree The watermark text rotation Angle, is null Means no rotation
*/
public static String markImageByMoreText(String source,String output,String imageName,String imageType,Color color,String word,Integer degree) {
String result = " Error adding text watermark ";
try {
// Read the original image information
File file = new File(source);
if (!file.isFile()) {
return file + " not 1 A picture file !";
}
Image img = ImageIO.read(file);
// Image width
int width = img.getWidth(null);
// Pictures of high
int height = img.getHeight(null);
// Text size
int size = 50;
// watermarking
BufferedImage bi = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics2D g = bi.createGraphics();
g.drawImage(img, 0, 0, width, height, null);
// Sets the watermark font style
Font font = new Font(" Song typeface ", Font.PLAIN, size);
// Set the watermark color according to the background of the image
g.setColor(color);
int x = width/3;
int y = size;
int space = height/size;
for(int i=0;i<space;i++){
// If the last 1 A coordinate y Axial ratio height High, just quit
if((y+size)>height){
break;
}
if (null != degree) {
// Set watermark rotation
g.rotate(Math.toRadians(degree),(double) bi.getWidth() / 2, (double) bi.getHeight() / 2);
}
g.setFont(font);
// The watermark position
g.drawString(word, x, y);
y+=(2*size);
}
g.dispose();
// The output image
File sf = new File(output, imageName+"."+imageType);
ImageIO.write(bi, imageType, sf); // Save the picture
result = " Add the picture Word The watermark ";
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
/**
* Add a single text watermark to the image and set the rotation Angle of the watermark
* @param source The image path to which the watermark is to be added (for example: F:/images/6.jpg )
* @param outPut After adding watermark, the image output path (such as: F:/images/ )
* @param imageName Picture name (e.g. : 11111 )
* @param imageType Picture type (e.g. : jpg )
* @param color The color of the watermark
* @param word Watermark text
* @param degree The watermark text rotation Angle, is null Means no rotation
*/
public static String markImageBySingleText(String source,String output,String imageName,String imageType,Color color,String word,Integer degree) {
String result = " Error adding text watermark ";
try {
// Read the original image information
File file = new File(source);
if (!file.isFile()) {
return file + " not 1 A picture file !";
}
Image img = ImageIO.read(file);
int width = img.getWidth(null);
int height = img.getHeight(null);
// watermarking
BufferedImage bi = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics2D g = bi.createGraphics();
g.drawImage(img, 0, 0, width, height, null);
// Sets the watermark font style
Font font = new Font(" Song typeface ", Font.PLAIN, 50);
// Set the watermark color according to the background of the image
g.setColor(color);
if (null != degree) {
// Set watermark rotation
g.rotate(Math.toRadians(degree),(double) bi.getWidth() / 2, (double) bi.getHeight() / 2);
}
g.setFont(font);
int x = width/3;
int y = height/2;
// The watermark position
g.drawString(word, x, y);
g.dispose();
// The output image
File sf = new File(output, imageName+"."+imageType);
ImageIO.write(bi, imageType, sf); // Save the picture
result = " Add the picture Word The watermark ";
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
/**
* Add mosaics to the picture
* @param source Path of the original picture (such as: F:/images/6.jpg )
* @param output After the Mosaic, the picture saved path (such as: F:/images/ )
* @param imageName Picture name (e.g. : 11111 )
* @param imageType Picture type (e.g. : jpg )
* @param size The Mosaic size is the width and height of each rectangle
* @return
*/
public static String markImageByMosaic(String source,String output,String imageName,String imageType,int size){
String result = " Picture Mosaic error ";
try{
File file = new File(source);
if (!file.isFile()) {
return file + " not 1 A picture file !";
}
BufferedImage img = ImageIO.read(file); // Read the picture
int width = img.getWidth(null); // The original image width
int height = img.getHeight(null); // The original image with high
BufferedImage bi = new BufferedImage(width,height, BufferedImage.TYPE_INT_RGB);
// Mosaics are too large or too small
if (width < size || height < size) {
return " The Mosaic lattice is too large ";
}
if(size<=0){
return " The Mosaic lattice is too small ";
}
int xcount = 0; //x Number of direction drawing
int ycount = 0; //y Number of direction drawing
if (width % size == 0) {
xcount = width / size;
} else {
xcount = width / size + 1;
}
if (height % size == 0) {
ycount = height / size;
} else {
ycount = height / size + 1;
}
int x = 0; //x coordinates
int y = 0;
//y coordinates
// Paint Mosaic ( Draws a rectangle and fills it with color )
Graphics2D g = bi.createGraphics();
for (int i = 0; i < xcount; i++) {
for (int j = 0; j < ycount; j++) {
// Mosaic rectangular grid size
int mwidth = size;
int mheight = size;
if(i==xcount-1){ // Transverse finally 1 One is not 1 a size
mwidth = width-x;
}
if(j == ycount-1){ // Longitudinal finally 1 One is not 1 a size
mheight = height-y;
}
// The rectangle color takes the center pixel RGB value
int centerX = x;
int centerY = y;
if (mwidth % 2 == 0) {
centerX += mwidth / 2;
} else {
centerX += (mwidth - 1) / 2;
}
if (mheight % 2 == 0) {
centerY += mheight / 2;
} else {
centerY += (mheight - 1) / 2;
}
Color color = new Color(img.getRGB(centerX, centerY));
g.setColor(color);
g.fillRect(x, y, mwidth, mheight);
y = y + size;// Under the calculation 1 A rectangular y coordinates
}
y = 0;// reduction y coordinates
x = x + size;// To calculate x coordinates
}
g.dispose();
File sf = new File(output, imageName+"."+imageType);
ImageIO.write(bi, imageType, sf); // Save the picture
result = " Mosaic success ";
}catch(Exception e){
e.printStackTrace();
}
return result;
}
}More java related content interested readers can see the special topics: Java picture operation skills Summary, java Date and time operation skills Summary, Java Operation DOM node skills Summary, Java File and directory operation Skills Summary and Java Data Structure and Algorithm Tutorial.
I hope this article has been helpful in java programming.