Copyright: LURAWAVE Version 2.0 Beta   Fri Apr 11 16:14:40 1997


Contents

LuraWave - Help

Overview

Compressing Pictures using Wavelet-Transform

About LuraWave

Contact LuRaTech

Principals of operation

Compressing a picture

Decompressing a picture

Menues

File

Open

Close

Save...

Quit

Picture

Copy

Paste

Zoom in

Zoom out

Info

View

Toolbar

Statusbar

Window

New

Cascade

Tile

Arrange Icons

Window 1,2,...

Help

Themes

Info


Commands of Menu File

Commands of the File Menue

Open	Load a picture from disk
Close	Close the active window
Save	Save content of active window
Quit	Quit LuraWave


Commands of the View Menu

Symbolbar	Switches the Toolbar on and off
Statusbar	Switches the statusbar on and off


Commands of the Window Menu

New	Creates a new view of the active picture
Stacker	Displays windows in a stacked manner
Tile vertical	Displays windows in a vertical manner
Tile horizontal	Displays windows beside each other
Clean up Symbols	Cleans up all symbols
Window 1, 2, ...	Activate the choosen window


Commands of the Picture Menu

Copy	Copies the frontmost picture to the clipboard
Paste	Paste content of the clipboard into a new window
Zoom in	Zooms the picture in the frontmost window
Zoom out	Shrink the picture in the frontmost window
Info	Shows some information about the aktive picture


Commands of the Help Menu

Themes	Shows the help directory
Context	Switches into context help
Info	Shows up version information


Command open (Menu File)

Open (File Menu)

Use this command to open a picture within a new window. You can open multiple windows at the same time. You can switch between open pictures by using the Window menu. See Window 1,2,...

Shortcut

Toolbar:

Keyboard:	STRG+O


The Dialog “File Open”

The following options are available if you like to open a picture.

Filename

Type a filename or select one out of the list. In the list you will find all pictures of the type specified in “Filetype”

Filetype

Choose the type of picture you like to open:

•	LWF	LuraWave Wavelet Format

•	BMP_	Windows / OS2 Bitmap

•	PGM_	Portable Gray-Map

•	PPM	Portable Pixel-Map

•	TIF_	Tagged Image File Format

Volumes

Choose a volume from wich you like to load the file.

Directory

Choose the directory from where you like to load the picture.

Network...

Use this button to connect a networkvolume to one of you drive-letters.

Preview

If you have marked this checkbox, you will see a small preview image of the

choosen file.

Options

If you select a file compressed in LuraWave format, you can specifiy some

special option like the loading rate here and version number.

Info

You can see the size, colordepth and filesize of the selected file here.


Command Close (Menu File)

The Close command (Menu File)

Use this command to close the topmost window

You can use the close symbol also.


Command Save (Menu File)

The Save command (Menu File)

Use this command to save the content of the frontmost window. You will get a dialog in which you can choose a format in which the picture should be converted and saved.

Shortcut

Toolbar:

Keyboard:	STRG+S


The Dialog “Save”

Filename

Enter a filename. A extension will be appended by LuraWave.

Volumes

Choose a volume to store the file.

Directory

Choose a directory to store the file.

Network...

Choose this button to assign a new volume-letter to a remote volume.

Options

Choose a option. Options available depend on the choosen filetype:

•	LuraWave Wavelet Format(*.lwf)

Version 1.5	The image will be compressed using the older version 1.5 of the LuraWave software
Version 2.0	The image will be compressed using the new version 2.0 of the LuraWave software.
Lossless	The picture will be compressed perfect, “lossless”
Rate	The picture will be compressed with the given rate. Los in picture quality may occur.
•	Windows / OS2 Bitmap (*.bmp)

No options

•	Portable Gray- or Pixmap (*.pgm;*ppm)

Binary	Picture will be stored in binary format
ASCII	Picture will be stored in ASCII format (Readable by a text editor)
•	Tagged Image File Format (*.tif)

Compression:

non	Picture is stored uncompressed
LZW	Picture is compressed using the Lempel-Zif-algorithm
Macintosh RLE	Picture is compressed using Apples “Macintosh RLE” runlength coding.


Commands 1, 2, 3, 4 (Menu File)

In this places you can see the names of the last four opened files. You can reopen the file by choosing the appropriate number.


Command Quit (Menu File)

Choose this command to close all pictures and quit the application. LuraWave will ask you to save unsaved pictures.

Shortcuts

Mouse:	Doubleclick in the upper left corner of the window.

Keyboard:	ALT+F4


Command Cut (Menu Edit)

This command cuts a selected area of a picture out of the frame and places the data into the clipboard.

You can use this command only if a area or a whole picture is selected. You can select a area by dragging a frame around it.

Shortcuts

Toolbar:

Keyboard:	STRG+X


Command Copy (Menu Edit)

This command will copy the frontmost picture into the clipboard.

Shortcuts

Toolbar:

Keyboard:	STRG+C


Command Paste (Menu Edit)

If there is a picture in the clipboard, it is opened in a new window.

Shortcuts

Toolbar:

Keyboard:	STRG+V


Command Symbols (Menu View)

Use this command to switch the Toolbar on and off. If the Toolbar is on, there is a mark in the menu.

The Toolbar gives you some buttons for the most comman functions like “open”.

See a description of all the buttons in the Toolbar.


Toolbar

To switch the Toolbar on and off, use “Toolbar” from menu “View”. (ALT,A,S).

Button	Action
	LuraWave shows the “Open-dialog” to search for files to open .
	LuraWave shows the “Save-dialog” to choose some options before saving the frontmost picture.
	Copies the frontmost picture into the clipboard.
	Create a new window with the contents of the clipboard.
	Zoomes in the frontmost window.
	Zoomes out the frontmost window
	Shows the directory of the LuraWave-Help-System.
	Switches into the Help-Mode. Click into a button ore window if you like to know what it is for.
	Shows the version of LuraWave for Windows


Command Statusbar (Menu View)

Command Status (Menu View)

Use this command to switch the statusbar on and off. If the statusbar is on, the menu is marked.

In the statusbar you can see a shortcut of the function of the button the mouse is over, the actual zoomfactor, the coordiantes of the mouse relative to the picture and the color of the pixel below the mouse.

See Statusbar for a further description.


Statusbar

The Statusbar is displayed at the lower border of LuraWave. You can switch it on and off with “Status” from the “View”-menu.

If you step thruh menu by ARROW-KEY you will see a short description of the menus function in the left part of the status bar.

If you click onto a button and hold the mouse down, you will see a descrition of the button. If you do not want to choose a command you have selected, drag the mouse out of the button while the mouse is still down.

On the right side of the status bar you will see the coordinates of the mouse in relation to the picture and the RGB-values of the color below the mouse.


Command New Window (Menu Window)

This command opens a new window and displays the same picture than the actual window. This feature is to view different areas of a picture in detail. If you make changes in one window, this changes will take effect in all the window of that picture.

If you open a new window with this command, it will be shown in front and will get the active window.


Command Cascade (Menu Window)

Use this command to display the open windows in a stacked manner.


Command Tile Vertical (Menu Window)

Use this command to display the open windows in a vertical manner.


Command Tile horizontal (Menu Window)

Use this command to display the open windows in a horizontal manner.


Command Clean Up Symbols (Menu Window)

Use this command to clean up the symbols at the lower border of the LuraWave window. You can create symbols from windows if you click into the “to Symbol”-button.

If the lower part of the LuraWave window is occupied by a window, the symbols will not be visible.


Command 1, 2, ... (Menu Window)

Here you can choose one of the opne windows to become the frontmost. The frontmost one is marked.


Themes (Menu Help)

Use this command to get the directory of the Help-system.


Command Use Help (Menu Help)

Use this command to optain hints for the use of most commands.


Command Info (Menu Help)

With this command you will get the version of your copy of LuraWave.


Commnad Use Help (Menu Help)

Command context help

If you click here, the mouse-arrow changes into a arrow with a question mark. Now you can click into any part of  LURAWAVEs windows and get help on this part.

Shortcut:

Keyboard:	SHIFT+F1


Titlebar

You can find the titlebar at the upper border of LuraWave. It contains the name of the application.

To place the window, you can drag here.


Scrollbars

If a picture is not completely visible inside ist window, you can pan the picture with this scrollbars.


Command Resize (Menu System)

Here you can resize LURAWAVEs window. You can also resize by dragging the lower right edge of the window.


Command Drag (Menu System)

You can use this command to drag the window on the screen. You can also do that by dragging the titlebar.


Command Symbol (Menu System)

Use this command to shrink LuraWave into a symbol.

Shortcut

Mouse:	Click into “Minimize” [image].

Keyboard:	ALT+F9


Command Maximize (Menu System)

Use this command to expand the size of LuraWave to the whole screen.

Shortcut

Mouse:	Click into “Maximize” [image].

Keyboard:	STRG+F10.


Command Next (Menu Document)

Use this command to activate the next window.

Shortcut

Keyboard:	STRG+F6


Command Previous (Menu Document)

Use this command to activate the previous window.

Shortcut

Keyboard:	SHIFT+STRG+F6


Command Close (Menu System)

Closes the active window or dialog.


Command recreate (Menu System)

Use this command to get the application back from a symbol.


Command Switch To (Menu System)

Use this command to get a list of all active tasks (applications). You can switch to another task or close one.

Shortcut

Keyboard:	STRG+ESC

The Task-List

Choose a task you like to switch to.

Switch to

Activates the choosen task.

Kill task

Closes the choosen task.

Cancel

Closes the task list.


Picture

This window displays a picture. You can zoom in,  zoom-out, save compressed  or uncompressed.


No help available


No help available


Formats

LWF	LuraWave Wavelet Format

BMP	Windows / OS2 Bitmap

PGM	Portable Gray Map

PPM	Portable Pixel Map

TIF	Tagged Image File Format


Compression Rate

Rate

Ratio of the filesize of the compressed and the uncompressed picture.


Quality

LWF-Quality

15-	best possible quality

1	best compression ratio

During save, you can set the compression ratio directly.


Diskspace

Shows the amount of free space on the choosen volume.


Compression of pictures using the Wavelet-Transform

Compression of pictures using wavelet transforms

LuraWave uses algorithms based on wavelet transforms.

This system has a lot of advantages compared to other algorithms:

wide range of compression ratios from lossless to very high rates (1 : 1000, lossy).

better quality with same filesize in comparisation to JPEG

exact defined compression ratio and filesizes

progressive load of data

compression with quality enhanced regions

quality based password protection of images

Netscape-Plug In available

PhotoShop-Plug In available


Any LWF-Tool can decompress a protected image up to the free quality, which is specified before compression. For further improvement of the image the user has to give the correct password. In internet image databases this can be done automatically via CGI.


During compression the user can specify regions, which will be compressed with higher priority, i.e. with a better quality. When the image is transferred over a network these regions will appear first in the data stream. So they will become visible earlier, when the image is reconstructed progressively.

You can try this with the LuraWave Netscape Plug In (http://www.luratech.de)


LuRaTech in the  Net

LuRaTech GmbH

	LuRaTech Gesellschaft für  Luft- und Raumfahrttechnologie & Multimedia mbH

Rudower Chaussee 5 (im IGZ)

D-12489 Berlin

Tel:  ++49 (0) 30-63 92 63 70

Fax: ++49 (0) 30-63 92 63 71

e-mail: lurawave@luratech.de

www: http://www.luratech.de/


About LuraWave

What is LuraWave

LuraWave will show the performance of a new, high power compression algorithms for data compression in comparisation to other popular compression shemes.

LuraWave includes algorithms for picture compression and decompression in lossless and lossy modes. Compression ratios range from 1:1,5 to 1:5 in lossless mode to 1:1000 in lossy mode.

Zoom and statistical functions are includes to allow easy comparisation.

LuraWave is able to handle the following formats:

LWF	LuraWave Wavelet Format

BMP	Windows / OS2 Bitmap

PGM	Portable Gray-Map

PPM	Portable Pixel-Map

TIF	Tagged Image File Format

Further formats will follow in later version.


Zoom in

Command Zoom In (Menu Picture)

Use this command to zoom into the frontmost picture.

Shortcut

Toolbar:

Keyboard:	GREY +


Zoom out

Command Zoom Out (Menu Picture)

Use this command to zoom out of the frontmost picture.

Shortcut

Toolbar:

Keyboard	GREY -


Picture info

Commad Info (Menu Picture)

Use this command to obtain som information about the frontmost window.


Preview

Click here to switch preview mode on and off.


HIDC_RADIO_PXM_BINARY

Click here to switch preview mode on and off.


HIDC_SPIN_LWF_LEVEL

Click here to switch preview mode on and off.


The compression of pictures

Compression of pictures

You can compress pictures by choosing “ Save” from the File-Menu and select the LuraWave-Format (*.lwf) to store the picture.


The decompression of pictures

Decompression of pictures

You decompress pictures by opening a file stored in LuraWave-Format (*.lwf) Decompression is done automatically.

You can store the picture uncompressed by using a other file format during save.