java 水印 图像处理 图片分割 裁剪 缩放

package com.linktel.graphics; import java.awt.AlphaComposite; import java.awt.Color; import java.awt.Graphics2D; import java.awt.Image; import java.awt.RenderingHints; import java.awt.Component.BaselineResizeBehavior; import java.awt.image.BufferedImage; import java.awt.image.ColorModel; import java.awt.image.IndexColorModel; import java.awt.image.PixelGrabber; import java.awt.image.renderable.ParameterBlock; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import javax.imageio.ImageIO; import javax.media.jai.JAI; import sun.awt.image.ImageDecoder; import com.sun.media.imageio.plugins.tiff.BaselineTIFFTagSet; import com.sun.media.imageio.plugins.tiff.TIFFTag; import com.sun.media.imageio.plugins.tiff.TIFFTagSet; import com.sun.media.jai.codec.*; import com.sun.media.jai.codecimpl.TIFFCodec; import com.sun.media.jai.codecimpl.TIFFImage; import com.sun.media.jai.codecimpl.TIFFImageDecoder; public class GraphicFax { private static final int DEFAULT_HEIGHT = 0; /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub GraphicFax graphicFax=new GraphicFax(); graphicFax.pressImage( "E:/技术文档/target.jpg", "E:/技术文档/a.tif", null, 800, 700, 122,122, 0.5f, 50); } /** * 查询某个区域的平均灰度 * @param width * @param height * @param pixels * @return */ private float getAverageGrap(int width,int height,int[] pixels){ /* 下面是开始算这个区域的亮度了，灰度等同于亮度 */ ColorModel colorModel = ColorModel.getRGBdefault(); int i = 0; int j = 0; int k = 0; int r = 0; int g = 0; int b = 0; int gray = 0; float average = 0;// 平均灰度 for (i = 0; i < height; i++) { for (j = 0; j < width; j++) { // 定位像素点 k = i * width + j; r = colorModel.getRed(pixels[k]); g = colorModel.getGreen(pixels[k]); b = colorModel.getBlue(pixels[k]); // 计算灰度值 gray = (r * 38 + g * 75 + b * 15) >> 7; average = average + gray; } } // 计算平均灰度 average = average / ((i - 1) * (j - 1)); return average; } /** * 将1张图片和另1张图片的指定区域重合。可用于制作水印。图片的左上角坐标为0，0 * * @param lightnessWaterImg * 颜色比较亮的水印图片，适合底色比较暗的情况 * @param darknessWaterImg * 颜色比较暗的水印图片，适合底色比较亮的情况,如果不想区分，则输入null，平均灰度边界同时失效。 * @param targetImg * 源图片 * @param startX * @param startY * @param x * @param y * @param alpha * 透明度,0f为全透明,1f为完全不透明,0.5f为半透明 * @param averageGray * 平均灰度边界（0-255），大于此值，则打暗的水印图片，小于此值则打亮的水印图片。 * 默认值128。超过范围，按默认值进行。 */ public final void pressImage( String darknessWaterImg, String targetImg,String nowTargetImg, int startX, int startY, int x, int y, float alpha, float averageGray) { try { System.out.println("GraphicFax pressImage() lightnessWaterImg:"); System.out.println("GraphicFax pressImage() darknessWaterImg:"+darknessWaterImg); System.out.println("GraphicFax pressImage() targetImg:"+targetImg); // 先判断亮水印和源文件的值是否为null，否则抛出异常 if ( targetImg == null || targetImg == "") { throw new Exception("亮水印或者源图片的地址不能为空"); } // 再判断平均灰度边界是否越界 BufferedImage src; // 装载源图片 // 图片装入内存 src= ImageIO.read(new File("f:/images/03.tif")); // 获取图片的尺寸 int width = src.getWidth(null); int height = src.getHeight(null); // 根据源图片尺寸，设置预装载的一个图片，默认是RGB格式的 byte[] arr = {(byte)0xff, (byte)0x0}; IndexColorModel newCM = new IndexColorModel(1, 2, arr, arr, arr); BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_BYTE_BINARY,newCM); Graphics2D graphics = image.createGraphics(); // 绘制内存中的源图片至指定的矩形内 System.out.println("Graphics the image "); graphics.drawImage(src, 0, 0, width, height, null); // 在已经绘制的图片中加入透明度通道 graphics.setComposite(AlphaComposite.getInstance( AlphaComposite.SRC_ATOP, alpha)); // 获取源图片中和设定的同样大小的区域内的像素集合 int[] pixels = getPixArray(src, startX, startY, x, y); System.out.println("get the PixArray "); System.out.println(targetImg); //查询此集合的平均灰度 //装载水印图片所需参数 File water; BufferedImage bufferwater; // 根据设定的平均灰度边界来装载不同的水印 // 装载亮水印文件 water = new File(darknessWaterImg); // 装入内存 bufferwater = ImageIO.read(water); graphics.drawImage(bufferwater, startX, startY, x, y, null); // 水印文件结束 // BaselineTIFFTagSet baseT=BaselineTIFFTagSet.getInstance(); // TIFFTag tagXRes = baseT.getTag(BaselineTIFFTagSet.PHOTOMETRIC_INTERPRETATION_WHITE_IS_ZERO); // // ParameterBlock paramBlock; // paramBlock = new ParameterBlock(); // paramBlock.addSource( image ); // // RenderingHints hints = new RenderingHints( JAI.KEY_TRANSFORM_ON_COLORMAP, // Boolean.TRUE ); graphics.dispose(); FileOutputStream out = new FileOutputStream("f:/images/aa.tif"); TIFFEncodeParam param = new TIFFEncodeParam(); param.setCompression(TIFFEncodeParam.COMPRESSION_GROUP3_2D); // The code below will give u a 200 dpi x res and a 200 dpi y res // 282 = X Res // 283 = Y Res // 296 = Res Unit // 262 = Photometric Interpertation 0 = WhiteIsZero, 1 = BlackIsZero // 266 = FillOrder // 277 = SamplesPerPixel // 259 = Compression // TIFFField[] extras = new TIFFField[8]; // extras[0] = new TIFFField(282, TIFFField.TIFF_RATIONAL, 1, (Object) new long[][] { {(long) 204, (long) 1 }, { (long) 0, (long) 0 } }); // extras[1] = new TIFFField(283, TIFFField.TIFF_RATIONAL, 1, (Object) new long[][] { {(long) 196, (long) 1 }, { (long) 0, (long) 0 } }); // extras[2] = new TIFFField(296, TIFFField.TIFF_SHORT, 1, (Object) new char[] { 2 }); // extras[3] = new TIFFField(262, TIFFField.TIFF_SHORT, 1, (Object) new char[] { 0 }); // extras[4] = new TIFFFie