import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import javax.imageio.ImageIO;
import javax.imageio.ImageReadParam;
import javax.imageio.ImageReader;
import javax.imageio.stream.ImageInputStream;
/**
* 图形识别技术
* 时间：2019-4-6
* */
public class ImageUtil {
private static List<String> emptyPoint = new ArrayList<>();
public static void plistPngImage(String sourcesFilePath) {
try {
if(!new File(sourcesFilePath).exists()){
return;
}
int amount = 1;
File sourceFile = new File(sourcesFilePath);
String newFilePath = sourceFile.getParentFile()+"\\"+sourceFile.getName().split("\\.")[0];
new File(newFilePath).mkdirs();
BufferedImage bi = ImageIO.read(new File(sourcesFilePath));
//获取图像的宽度和高度
int width = bi.getWidth();
int height = bi.getHeight();
int beginX = 0;
for(int i=0;i<width;i++){
Integer cutY_1 = null;
Integer cutY_2 = null;
for(int j = 0; j < height; j++){
if(!linePointIsEmpty_x(bi,j,beginX,i)){
if(cutY_1 == null){
cutY_1 = j;
}
}else{
if(cutY_1 != null){
cutY_2 = j;
Integer cutX_1 = null;
Integer cutX_2 = null;
for(int k=beginX;k<=i;k++){
if(!linePointIsEmpty_y(bi,k,cutY_1,cutY_2)){
if(cutX_1 == null){
cutX_1 = k;
}
}else{
if(cutX_1 != null){
cutX_2 = k;
System.out.println("开始截图点为:("+cutX_1+","+cutY_1+"),结束截图的点为:("+cutX_2+","+cutY_2+")"+i);
cutPNG(sourcesFilePath,newFilePath+"\\"+(amount++)+".png", cutX_1,cutY_1,(cutX_2-cutX_1)+1,(cutY_2-cutY_1)+1);
addPointToEmpty(bi,cutX_1,cutY_1,cutX_2,cutY_2);
cutX_1 = null;
}
}
}
cutY_1 = null;
}
}
}
for(int h=beginX;h<i;h++){
if(linePointIsEmpty_y(bi,h,0,height-1)){
beginX = h;
for(int l=0;l<emptyPoint.size();l++){
if(Integer.parseInt(emptyPoint.get(l).split("-")[0])<beginX){
emptyPoint.remove(l);
}
}
System.out.println(emptyPoint.size());
}else{
break;
}
}
System.out.println(beginX);
}
}catch (Exception e){
e.printStackTrace();
}
}
private static boolean pointIsEmpty(BufferedImage bi,Integer x,Integer y){
int p = bi.getRGB(x, y);
if(p == 0xffffff){
return true;
}
if(p == 0){
return true;
}
if(emptyPoint.contains(x+"-"+y)){
return true;
}
return false;
}
private static boolean linePointIsEmpty_x(BufferedImage bi,Integer y,Integer x_1,Integer x_2){
for(int j=x_1;j<=x_2;j++){
if(!pointIsEmpty(bi,j,y)){
return false;
}
}
return true;
}
private static boolean linePointIsEmpty_y(BufferedImage bi,Integer x,Integer y_1,Integer y_2){
for(int i=y_1;i<=y_2;i++){
if(!pointIsEmpty(bi,x,i)){
return false;
}
}
return true;
}
private static void addPointToEmpty(BufferedImage bi,Integer x_1,Integer y_1,Integer x_2,Integer y_2){
for(int i=x_1;i<=x_2;i++){
for(int j=y_1;j<=y_2;j++){
int p = bi.getRGB(i,j);
if(p == 0xffffff){
continue;
}
if(p == 0){
continue;
}
if(!emptyPoint.contains(i+"-"+j)){
emptyPoint.add(i+"-"+j);
}
}
}
}
public static void cutJPG(String sourceFilePath, String newFilePath, int x, int y, int width, int height) throws IOException {
ImageInputStream imageStream = null;
try {
Iterator<ImageReader> readers = ImageIO.getImageReadersByFormatName("jpg");
ImageReader reader = readers.next();
imageStream = ImageIO.createImageInputStream(new FileInputStream(sourceFilePath));
reader.setInput(imageStream, true);
ImageReadParam param = reader.getDefaultReadParam();
Rectangle rect = new Rectangle(x, y, width, height);
param.setSourceRegion(rect);
BufferedImage bi = reader.read(0, param);
if(!new File(newFilePath).exists()){
new File(newFilePath).createNewFile();
}
ImageIO.write(bi, "jpg", new FileOutputStream(newFilePath));
} finally {
imageStream.close();
}
}
public static void cutPNG(String sourceFilePath, String newFilePath, int x, int y, int width, int height) throws IOException {
ImageInputStream imageStream = null;
try {
Iterator<ImageReader> readers = ImageIO.getImageReadersByFormatName("png");
ImageReader reader = readers.next();
imageStream = ImageIO.createImageInputStream(new FileInputStream(sourceFilePath));
reader.setInput(imageStream, true);
ImageReadParam param = reader.getDefaultReadParam();
Rectangle rect = new Rectangle(x, y, width, height);
param.setSourceRegion(rect);
BufferedImage bi = reader.read(0, param);
if(!new File(newFilePath).exists()){
new File(newFilePath).createNewFile();
}
ImageIO.write(bi, "png", new FileOutputStream(newFilePath));
} finally {
imageStream.close();
}
}
public static void cutImage(String sourceFilePath, String newFilePath, String type,int x, int y, int width, int height) throws IOException {
ImageInputStream imageStream = null;
try {
String imageType=(null==type||"".equals(type))?"jpg":type;
Iterator<ImageReader> readers = ImageIO.getImageReadersByFormatName(imageType);
ImageReader reader = readers.next();
imageStream = ImageIO.createImageInputStream(new FileInputStream(sourceFilePath));
reader.setInput(imageStream, true);
ImageReadParam param = reader.getDefaultReadParam();
Rectangle rect = new Rectangle(x, y, width, height);
param.setSourceRegion(rect);
BufferedImage bi = reader.read(0, param);
if(!new File(newFilePath).exists()){
new File(newFilePath).createNewFile();
}
ImageIO.write(bi, imageType, new FileOutputStream(newFilePath));
} finally {
imageStream.close();
}
}
public static void main(String[] args) {
plistPngImage("e:\\111.png");
}
}
全部代码就是这了,,, 只要把大图路径写对 就能分割了,分割后的路径 和大图路径一样. 因为是一个像素一个像素分析,所以 效率可能不是那么快 大家有兴趣可以留言,,看如何增加以下效率