如何在android处理图片(图像二值化锐化转换格式)

链接：如何在android处理图片( 图像二值化、锐化、转换格式)

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package net.wealthgod.client.center.ocr;

import java.awt.Graphics2D;

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.ColorModel;

import java.awt.image.MemoryImageSource;

import java.awt.image.PixelGrabber;

public class ImageFilter {

private BufferedImage image;

private int iw, ih;

private int[] pixels;

public ImageFilter(BufferedImage image) {

this.image = image;

iw = image.getWidth();

ih = image.getHeight();

pixels = new int[iw * ih];

}

/** 图像二值化 */

public BufferedImage changeGrey() {

PixelGrabber pg = new PixelGrabber(image.getSource(), 0, 0, iw, ih, pixels, 0, iw);

try {

pg.grabPixels();

} catch (InterruptedException e) {

e.printStackTrace();

}

// 设定二值化的域值，默认值为100

int grey = 100;

// 对图像进行二值化处理，Alpha值保持不变

ColorModel cm = ColorModel.getRGBdefault();

for (int i = 0; i < iw * ih; i++) {

int red, green, blue;

int alpha = cm.getAlpha(pixels[i]);

if (cm.getRed(pixels[i]) > grey) {

red = 255;

} else {

red = 0;

}

if (cm.getGreen(pixels[i]) > grey) {

green = 255;

} else {

green = 0;

}

if (cm.getBlue(pixels[i]) > grey) {

blue = 255;

} else {

blue = 0;

}

pixels[i] = alpha << 24 | red << 16 | green << 8 | blue;

}

// 将数组中的象素产生一个图像

return ImageIOHelper.imageProducerToBufferedImage(new MemoryImageSource(iw, ih, pixels, 0, iw));

}

/** 提升清晰度,进行锐化 */

public BufferedImage sharp() {

PixelGrabber pg = new PixelGrabber(image.getSource(), 0, 0, iw, ih, pixels, 0, iw);

try {

pg.grabPixels();

} catch (InterruptedException e) {

e.printStackTrace();

}

// 象素的中间变量

int tempPixels[] = new int[iw * ih];

for (int i = 0; i < iw * ih; i++) {

tempPixels[i] = pixels[i];

}

// 对图像进行尖锐化处理，Alpha值保持不变

ColorModel cm = ColorModel.getRGBdefault();

for (int