import java.io.*;
import java.awt.*;
import java.awt.image.*;
import java.awt.Graphics;
import java.awt.color.ColorSpace;
import javax.imageio.ImageIO;
public class ImageCut {
?/**
? * 縮放圖像
? *
? * @param srcImageFile
? *??????????? 源圖像文件地址
? * @param result
? *??????????? 縮放后的圖像地址
? * @param scale
? *??????????? 縮放比例
? * @param flag
? *??????????? 縮放選擇:true 放大; false 縮小;
? */
?public static void scale(String srcImageFile, String result, int scale,
???boolean flag) {
??try {
???BufferedImage src = ImageIO.read(new File(srcImageFile)); // 讀入文件
???int width = src.getWidth(); // 得到源圖寬
???int height = src.getHeight(); // 得到源圖長
???if (flag) {
????// 放大
????width = width * scale;
????height = height * scale;
???} else {
????// 縮小
????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); // 繪制縮小后的圖
???g.dispose();
???ImageIO.write(tag, "JPEG", new File(result));// 輸出到文件流
??} catch (IOException e) {
???e.printStackTrace();
??}
?}
?/**
? * 圖像切割
? *
? * @param srcImageFile
? *??????????? 源圖像地址
? * @param descDir
? *??????????? 切片目標文件夾
? * @param destWidth
? *??????????? 目標切片寬度
? * @param destHeight
? *??????????? 目標切片高度
? */
?public static void cut(String srcImageFile, String descDir, int destWidth,
???int destHeight) {
??try {
???Image img;
???ImageFilter cropFilter;
???// 讀取源圖像
???BufferedImage bi = ImageIO.read(new File(srcImageFile));
???int srcWidth = bi.getHeight(); // 源圖寬度
???int srcHeight = bi.getWidth(); // 源圖高度
???if (srcWidth > destWidth && srcHeight > destHeight) {
????Image image = bi.getScaledInstance(srcWidth, srcHeight,
??????Image.SCALE_DEFAULT);
????destWidth = 200; // 切片寬度
????destHeight = 150; // 切片高度
????int cols = 0; // 切片橫向數量
????int rows = 0; // 切片縱向數量
????// 計算切片的橫向和縱向數量
????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;
????}
????// 循環建立切片
????// 改進的想法:是否可用多線程加快切割速度
????for (int i = 0; i < rows; i++) {
?????for (int j = 0; j < cols; j++) {
??????// 四個參數分別為圖像起點坐標和寬高
??????// 即: CropImageFilter(int x,int y,int width,int height)
??????cropFilter = new CropImageFilter(j * 200, i * 150,
????????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); // 繪制縮小后的圖
??????g.dispose();
??????// 輸出為文件
??????ImageIO.write(tag, "JPEG", new File(descDir
????????+ "pre_map_" + i + "_" + j + ".jpg"));
?????}
????}
???}
??} catch (Exception e) {
???e.printStackTrace();
??}
?}
?/**
? * 圖像類型轉換 GIF->JPG GIF->PNG PNG->JPG PNG->GIF(X)
? */
?public static void convert(String source, String result) {
??try {
???File f = new File(source);
???f.canRead();
???f.canWrite();
???BufferedImage src = ImageIO.read(f);
???ImageIO.write(src, "JPG", new File(result));
??} catch (Exception e) {
???// TODO Auto-generated catch block
???e.printStackTrace();
??}
?}
?/**
? * 彩色轉為黑白
? *
? * @param source
? * @param result
? */
?public static void gray(String source, String result) {
??try {
???BufferedImage src = ImageIO.read(new File(source));
???ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_GRAY);
???ColorConvertOp op = new ColorConvertOp(cs, null);
???src = op.filter(src, null);
???ImageIO.write(src, "JPEG", new File(result));
??} catch (IOException e) {
???e.printStackTrace();
??}
?}
?/**
? * @param args
? */
?public static void main(String[] args) {
? ?? cut("D:/logo.gif", "D:/", 20, 15);
?????convert("D:/logo.gif", "D:/temp.png");
?}
}