org.javlo.image

Class ImageHelper

java.lang.Object

org.javlo.image.ImageHelper

public class ImageHelper
extends Object

Author:

pvanderm

Field Summary

Fields

Modifier and Type	Field and Description
static int	BACK_AND_WHITE_FILTER
protected static Logger	logger create a static logger.
static int	NO_FILTER

Constructor Summary

Constructors

Constructor and Description
ImageHelper()

Method Summary

Modifier and Type	Method and Description
static BufferedImage	createAbsoluteLittleImage(javax.servlet.ServletContext servletContext, String name, int width)
static BufferedImage	createLittleImage(javax.servlet.ServletContext servletContext, String name, int width)
static String	createSpecialDirectory(ContentContextBean ctxb, String context, String filter, String area, String deviceCode, Template template, IImageFilter comp, ImageConfig.ImageParameters param)
static String	createSpecialDirectory(int width)
static String	createSpecialDirectory(int width, int filter)
static BufferedImage	getBestImageFromVideo(File file) create a image for display video
static int	getColorCount(BufferedImage image)
static double	getContrastRatio(BufferedImage image)
static Map<String,String>	getExifData(InputStream in)
static ImageSize	getExifSize(InputStream in) return dimension of picture in exif data, null if not found.
static String	getImageExtensionToManType(String ext)
static String	getImageFormat(String fileName)
static ImageSize	getImageSize(File file)
static ImageSize	getJpegSize(InputStream in)
static BufferedImage	loadImage(javax.servlet.ServletContext servletContext, String name)
static void	main(String[] args)
static String	pathToKey(String path) transform a path in a string to a key. this key can be a directory name ( sp. replace / and \ with _ ).
static BufferedImage	resize(BufferedImage aOrgImage, int width)
static BufferedImage	toBufferedImage(org.jcodec.common.model.Picture src)
static void	toBufferedImage(org.jcodec.common.model.Picture src, BufferedImage dst)

Methods inherited from class java.lang.Object

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

Field Detail

logger

protected static Logger logger

create a static logger.

NO_FILTER

public static final int NO_FILTER

See Also:

Constant Field Values

BACK_AND_WHITE_FILTER

public static final int BACK_AND_WHITE_FILTER

See Also:

Constant Field Values

Constructor Detail

ImageHelper

public ImageHelper()

Method Detail

createSpecialDirectory

public static String createSpecialDirectory(int width)

createSpecialDirectory

public static String createSpecialDirectory(ContentContextBean ctxb,
                                            String context,
                                            String filter,
                                            String area,
                                            String deviceCode,
                                            Template template,
                                            IImageFilter comp,
                                            ImageConfig.ImageParameters param)

createSpecialDirectory

public static String createSpecialDirectory(int width,
                                            int filter)

pathToKey

public static String pathToKey(String path)

transform a path in a string to a key. this key can be a directory name ( sp. replace / and \ with _ ).

Parameters:

path - a path to a file

Returns:

a key can be a directory name.

createAbsoluteLittleImage

public static BufferedImage createAbsoluteLittleImage(javax.servlet.ServletContext servletContext,
                                                      String name,
                                                      int width)
                                               throws IOException

Throws:

IOException

loadImage

public static BufferedImage loadImage(javax.servlet.ServletContext servletContext,
                                      String name)
                               throws IOException

Throws:

IOException

createLittleImage

public static BufferedImage createLittleImage(javax.servlet.ServletContext servletContext,
                                              String name,
                                              int width)
                                       throws IOException

Throws:

IOException

resize

public static BufferedImage resize(BufferedImage aOrgImage,
                                   int width)

getImageFormat

public static final String getImageFormat(String fileName)

getImageExtensionToManType

public static final String getImageExtensionToManType(String ext)

getExifSize

public static ImageSize getExifSize(InputStream in)
                             throws IOException

return dimension of picture in exif data, null if not found.

Parameters:

in -

Returns:

Throws:

IOException

getJpegSize

public static ImageSize getJpegSize(InputStream in)

getImageSize

public static ImageSize getImageSize(File file)
                              throws IOException

Throws:

IOException

getExifData

public static Map<String,String> getExifData(InputStream in)
                                      throws IOException

Throws:

IOException

main

public static void main(String[] args)
                 throws Exception

Throws:

Exception

toBufferedImage

public static BufferedImage toBufferedImage(org.jcodec.common.model.Picture src)

toBufferedImage

public static void toBufferedImage(org.jcodec.common.model.Picture src,
                                   BufferedImage dst)

getContrastRatio

public static double getContrastRatio(BufferedImage image)

getColorCount

public static int getColorCount(BufferedImage image)

getBestImageFromVideo

public static BufferedImage getBestImageFromVideo(File file)
                                           throws Exception

create a image for display video

Parameters:

file - mp4 file

Returns:

Throws:

IOException

org.jcodec.api.JCodecException

Exception