Simple Java image processing class of image watermark image scaling
- 2020-04-01 02:27:10
- OfStack
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.color.ColorSpace;
import java.awt.geom.AffineTransform;
import java.awt.image.AffineTransformOp;
import java.awt.image.BufferedImage;
import java.awt.image.ColorConvertOp;
import java.awt.image.CropImageFilter;
import java.awt.image.FilteredImageSource;
import java.awt.image.ImageFilter;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
public class ImageUtils {
public static String IMAGE_TYPE_GIF = "gif";//Graphics interchange format
public static String IMAGE_TYPE_JPG = "jpg";//Joint photo expert group
public static String IMAGE_TYPE_JPEG = "jpeg";//Joint photo expert group
public static String IMAGE_TYPE_BMP = "bmp";//Bitmap, short for Bitmap, is the standard image file format in the Windows operating system
public static String IMAGE_TYPE_PNG = "png";//Portable network graphics
public static String IMAGE_TYPE_PSD = "psd";//Photoshop's proprietary format, Photoshop
public static void main(String[] args) {
//1- zoom image:
//Method 1: scale to scale
ImageUtils.scale("e:/abc.jpg", "e:/abc_scale.jpg", 2, true);//Test OK
//Method 2: scale by height and width
ImageUtils.scale2("e:/abc.jpg", "e:/abc_scale2.jpg", 500, 300, true);//Test OK
//2- cutting image:
//Method 1: cut by the specified starting point coordinates and width and height
ImageUtils.cut("e:/abc.jpg", "e:/abc_cut.jpg", 0, 0, 400, 400 );//Test OK
//Method 2: specify the number of rows and columns of slices
ImageUtils.cut2("e:/abc.jpg", "e:/", 2, 2 );//Test OK
//Method 3: specify the width and height of the slice
ImageUtils.cut3("e:/abc.jpg", "e:/", 300, 300 );//Test OK
//3- image type conversion:
ImageUtils.convert("e:/abc.jpg", "GIF", "e:/abc_convert.gif");//Test OK
//4- color to black and white:
ImageUtils.gray("e:/abc.jpg", "e:/abc_gray.jpg");//Test OK
//5- add text watermark to the picture:
//Method one:
ImageUtils.pressText(" I am watermark text ","e:/abc.jpg","e:/abc_pressText.jpg"," Song typeface ",Font.BOLD,Color.white,80, 0, 0, 0.5f);//Test OK
//Method 2:
ImageUtils.pressText2(" I am also watermark text ", "e:/abc.jpg","e:/abc_pressText2.jpg", " blackbody ", 36, Color.white, 80, 0, 0, 0.5f);//Test OK
//6- add image watermarking to the image:
ImageUtils.pressImage("e:/abc2.jpg", "e:/abc.jpg","e:/abc_pressImage.jpg", 0, 0, 0.5f);//Test OK
}
public final static void scale(String srcImageFile, String result,
int scale, boolean flag) {
try {
BufferedImage src = ImageIO.read(new File(srcImageFile)); //Read the file
int width = src.getWidth(); //Get the source image width
int height = src.getHeight(); //Get the source graph length
if (flag) {//amplification
width = width * scale;
height = height * scale;
} else {//narrow
width = width / scale;
height = height / scale;
}
Image image = src.getScaledInstance(width, height,
Image.SCALE_DEFAULT);
BufferedImage tag = new BufferedImage(width, height,
BufferedImage.TYPE_INT_RGB);
Graphics g = tag.getGraphics();
g.drawImage(image, 0, 0, null); //Draw a reduced graph
g.dispose();
ImageIO.write(tag, "JPEG", new File(result));//Output to file stream
} catch (IOException e) {
e.printStackTrace();
}
}
public final static void scale2(String srcImageFile, String result, int height, int width, boolean bb) {
try {
double ratio = 0.0; //scaling
File f = new File(srcImageFile);
BufferedImage bi = ImageIO.read(f);
Image itemp = bi.getScaledInstance(width, height, bi.SCALE_SMOOTH);
//Calculate percentage
if ((bi.getHeight() > height) || (bi.getWidth() > width)) {
if (bi.getHeight() > bi.getWidth()) {
ratio = (new Integer(height)).doubleValue()
/ bi.getHeight();
} else {
ratio = (new Integer(width)).doubleValue() / bi.getWidth();
}
AffineTransformOp op = new AffineTransformOp(AffineTransform
.getScaleInstance(ratio, ratio), null);
itemp = op.filter(bi, null);
}
if (bb) {//padding
BufferedImage image = new BufferedImage(width, height,
BufferedImage.TYPE_INT_RGB);
Graphics2D g = image.createGraphics();
g.setColor(Color.white);
g.fillRect(0, 0, width, height);
if (width == itemp.getWidth(null))
g.drawImage(itemp, 0, (height - itemp.getHeight(null)) / 2,
itemp.getWidth(null), itemp.getHeight(null),
Color.white, null);
else
g.drawImage(itemp, (width - itemp.getWidth(null)) / 2, 0,
itemp.getWidth(null), itemp.getHeight(null),
Color.white, null);
g.dispose();
itemp = image;
}
ImageIO.write((BufferedImage) itemp, "JPEG", new File(result));
} catch (IOException e) {
e.printStackTrace();
}
}
public final static void cut(String srcImageFile, String result,
int x, int y, int width, int height) {
try {
//Read source image
BufferedImage bi = ImageIO.read(new File(srcImageFile));
int srcWidth = bi.getHeight(); //Source map width
int srcHeight = bi.getWidth(); //Source map height
if (srcWidth > 0 && srcHeight > 0) {
Image image = bi.getScaledInstance(srcWidth, srcHeight,
Image.SCALE_DEFAULT);
//The four parameters are the starting coordinates and the width and height of the image respectively
//CropImageFilter(int x,int y,int width,int height)
ImageFilter cropFilter = new CropImageFilter(x, y, width, height);
Image img = Toolkit.getDefaultToolkit().createImage(
new FilteredImageSource(image.getSource(),
cropFilter));
BufferedImage tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics g = tag.getGraphics();
g.drawImage(img, 0, 0, width, height, null); //Draw the cut diagram
g.dispose();
//Output as a file
ImageIO.write(tag, "JPEG", new File(result));
}
} catch (Exception e) {
e.printStackTrace();
}
}
public final static void cut2(String srcImageFile, String descDir,
int rows, int cols) {
try {
if(rows<=0||rows>20) rows = 2; //Section lines of
if(cols<=0||cols>20) cols = 2; //Slice the number of columns
//Read source image
BufferedImage bi = ImageIO.read(new File(srcImageFile));
int srcWidth = bi.getHeight(); //Source map width
int srcHeight = bi.getWidth(); //Source map height
if (srcWidth > 0 && srcHeight > 0) {
Image img;
ImageFilter cropFilter;
Image image = bi.getScaledInstance(srcWidth, srcHeight, Image.SCALE_DEFAULT);
int destWidth = srcWidth; //Width of each slice
int destHeight = srcHeight; //The height of each slice
//Calculate the width and height of the slice
if (srcWidth % cols == 0) {
destWidth = srcWidth / cols;
} else {
destWidth = (int) Math.floor(srcWidth / cols) + 1;
}
if (srcHeight % rows == 0) {
destHeight = srcHeight / rows;
} else {
destHeight = (int) Math.floor(srcWidth / rows) + 1;
}
//Cyclic sectioning
//Improved idea: whether multi-threading can be used to speed up cutting
for (int i = 0; i < rows; i++) {
for (int j = 0; j < cols; j++) {
//The four parameters are the starting coordinates and the width and height of the image respectively
//CropImageFilter(int x,int y,int width,int height)
cropFilter = new CropImageFilter(j * destWidth, i * destHeight,
destWidth, destHeight);
img = Toolkit.getDefaultToolkit().createImage(
new FilteredImageSource(image.getSource(),
cropFilter));
BufferedImage tag = new BufferedImage(destWidth,
destHeight, BufferedImage.TYPE_INT_RGB);
Graphics g = tag.getGraphics();
g.drawImage(img, 0, 0, null); //Draw a reduced graph
g.dispose();
//Output as a file
ImageIO.write(tag, "JPEG", new File(descDir
+ "_r" + i + "_c" + j + ".jpg"));
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
public final static void cut3(String srcImageFile, String descDir,
int destWidth, int destHeight) {
try {
if(destWidth<=0) destWidth = 200; //Slice width
if(destHeight<=0) destHeight = 150; //Slice height
//Read source image
BufferedImage bi = ImageIO.read(new File(srcImageFile));
int srcWidth = bi.getHeight(); //Source map width
int srcHeight = bi.getWidth(); //Source map height
if (srcWidth > destWidth && srcHeight > destHeight) {
Image img;
ImageFilter cropFilter;
Image image = bi.getScaledInstance(srcWidth, srcHeight, Image.SCALE_DEFAULT);
int cols = 0; //Transverse number of slices
int rows = 0; //Section longitudinal number
//The number of horizontal and vertical slices was calculated
if (srcWidth % destWidth == 0) {
cols = srcWidth / destWidth;
} else {
cols = (int) Math.floor(srcWidth / destWidth) + 1;
}
if (srcHeight % destHeight == 0) {
rows = srcHeight / destHeight;
} else {
rows = (int) Math.floor(srcHeight / destHeight) + 1;
}
//Cyclic sectioning
//Improved idea: whether multi-threading can be used to speed up cutting
for (int i = 0; i < rows; i++) {
for (int j = 0; j < cols; j++) {
//The four parameters are the starting coordinates and the width and height of the image respectively
//CropImageFilter(int x,int y,int width,int height)
cropFilter = new CropImageFilter(j * destWidth, i * destHeight,
destWidth, destHeight);
img = Toolkit.getDefaultToolkit().createImage(
new FilteredImageSource(image.getSource(),
cropFilter));
BufferedImage tag = new BufferedImage(destWidth,
destHeight, BufferedImage.TYPE_INT_RGB);
Graphics g = tag.getGraphics();
g.drawImage(img, 0, 0, null); //Draw a reduced graph
g.dispose();
//Output as a file
ImageIO.write(tag, "JPEG", new File(descDir
+ "_r" + i + "_c" + j + ".jpg"));
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
public final static void convert(String srcImageFile, String formatName, String destImageFile) {
try {
File f = new File(srcImageFile);
f.canRead();
f.canWrite();
BufferedImage src = ImageIO.read(f);
ImageIO.write(src, formatName, new File(destImageFile));
} catch (Exception e) {
e.printStackTrace();
}
}
public final static void gray(String srcImageFile, String destImageFile) {
try {
BufferedImage src = ImageIO.read(new File(srcImageFile));
ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_GRAY);
ColorConvertOp op = new ColorConvertOp(cs, null);
src = op.filter(src, null);
ImageIO.write(src, "JPEG", new File(destImageFile));
} catch (IOException e) {
e.printStackTrace();
}
}
public final static void pressText(String pressText,
String srcImageFile, String destImageFile, String fontName,
int fontStyle, Color color, int fontSize,int x,
int y, float alpha) {
try {
File img = new File(srcImageFile);
Image src = ImageIO.read(img);
int width = src.getWidth(null);
int height = src.getHeight(null);
BufferedImage image = new BufferedImage(width, height,
BufferedImage.TYPE_INT_RGB);
Graphics2D g = image.createGraphics();
g.drawImage(src, 0, 0, width, height, null);
g.setColor(color);
g.setFont(new Font(fontName, fontStyle, fontSize));
g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,
alpha));
//Draws watermark text at specified coordinates
g.drawString(pressText, (width - (getLength(pressText) * fontSize))
/ 2 + x, (height - fontSize) / 2 + y);
g.dispose();
ImageIO.write((BufferedImage) image, "JPEG", new File(destImageFile));//Output to file stream
} catch (Exception e) {
e.printStackTrace();
}
}
public final static void pressText2(String pressText, String srcImageFile,String destImageFile,
String fontName, int fontStyle, Color color, int fontSize, int x,
int y, float alpha) {
try {
File img = new File(srcImageFile);
Image src = ImageIO.read(img);
int width = src.getWidth(null);
int height = src.getHeight(null);
BufferedImage image = new BufferedImage(width, height,
BufferedImage.TYPE_INT_RGB);
Graphics2D g = image.createGraphics();
g.drawImage(src, 0, 0, width, height, null);
g.setColor(color);
g.setFont(new Font(fontName, fontStyle, fontSize));
g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,
alpha));
//Draws watermark text at specified coordinates
g.drawString(pressText, (width - (getLength(pressText) * fontSize))
/ 2 + x, (height - fontSize) / 2 + y);
g.dispose();
ImageIO.write((BufferedImage) image, "JPEG", new File(destImageFile));
} catch (Exception e) {
e.printStackTrace();
}
}
public final static void pressImage(String pressImg, String srcImageFile,String destImageFile,
int x, int y, float alpha) {
try {
File img = new File(srcImageFile);
Image src = ImageIO.read(img);
int wideth = src.getWidth(null);
int height = src.getHeight(null);
BufferedImage image = new BufferedImage(wideth, height,
BufferedImage.TYPE_INT_RGB);
Graphics2D g = image.createGraphics();
g.drawImage(src, 0, 0, wideth, height, null);
//Watermark file
Image src_biao = ImageIO.read(new File(pressImg));
int wideth_biao = src_biao.getWidth(null);
int height_biao = src_biao.getHeight(null);
g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,
alpha));
g.drawImage(src_biao, (wideth - wideth_biao) / 2,
(height - height_biao) / 2, wideth_biao, height_biao, null);
//Watermark file The end of the
g.dispose();
ImageIO.write((BufferedImage) image, "JPEG", new File(destImageFile));
} catch (Exception e) {
e.printStackTrace();
}
}
public final static int getLength(String text) {
int length = 0;
for (int i = 0; i < text.length(); i++) {
if (new String(text.charAt(i) + "").getBytes().length > 1) {
length += 2;
} else {
length += 1;
}
}
return length / 2;
}
}