org.ofdrw.reader.tools

Class ImageUtils

java.lang.Object

org.ofdrw.reader.tools.ImageUtils

public class ImageUtils
extends Object

图片处理工具

Since:

2021-04-10 18:31:03

Author:

qaqtutu

Constructor Summary

Constructors

Constructor and Description
ImageUtils()

Method Summary

Modifier and Type	Method and Description
static BufferedImage	clearWhiteBackground(BufferedImage in, int gray) 清除图片背景
static BufferedImage	createImage(int width, int height, boolean isTransparent) 创建图片
static int	gray(int r, int g, int b) 计算灰度
static BufferedImage	readJB2(InputStream in) 读取JB2格式图片
static BufferedImage	renderMask(BufferedImage image, BufferedImage mask) 蒙版抠图
static byte[]	toBytes(BufferedImage bufferedImage, String type)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ImageUtils

public ImageUtils()

Method Detail

toBytes

public static byte[] toBytes(BufferedImage bufferedImage,
                             String type)
                      throws IOException

Throws:

IOException

readJB2

public static BufferedImage readJB2(InputStream in)
                             throws IOException

读取JB2格式图片

Parameters:

in - 图片数据流

Returns:

图片数据

Throws:

IOException - 图片操作异常

renderMask

public static BufferedImage renderMask(BufferedImage image,
                                       BufferedImage mask)

蒙版抠图

根据mask中像素的颜色将原图中的像素抠掉

Parameters:

image - 原始图片

mask - 蒙板图片

Returns:

扣去背景的图片对象

gray

public static int gray(int r,
                       int g,
                       int b)

计算灰度

Parameters:

r - 红色通道

g - 绿色通道

b - 蓝色通道

Returns:

灰度值

createImage

public static BufferedImage createImage(int width,
                                        int height,
                                        boolean isTransparent)

创建图片

Parameters:

width - 图形宽度

height - 图像高度

isTransparent - 是否透明

Returns:

图片对象

clearWhiteBackground

public static BufferedImage clearWhiteBackground(BufferedImage in,
                                                 int gray)

清除图片背景

Parameters:

in - 输入图片

gray - 灰度阈值(0-255)，图像中大于该值的像素将会被删除。

Returns:

清空背景的图片