HDevelop User's Manual

2 CHAPTER 1. INTRODUCING HDEVELOP
help is based on an internet browser such as Netscape Navigator or Microsoft Internet
Explorer.
¾ HDevelop comprises a program interpreter with edit and debug functions. It supports
programming features, such as loops and conditions. Parameters can be changed even
while the program is running.
¾ HDevelop immediately displays the results of operations. You can try different operators
and/or parameters, and immediately see the effect on the screen. Moreover, you can
preview the results of an operator without changing the program.
¾ Several graphical tools allow to examine iconic and control data online. For example,
you can extract shape and gray value features by simply clicking onto the objects in the
graphics window, or inspect the histogram of an image interactively and apply real-time
segmentation to select parameters.
¾ Variables with an automatic garbage collection are used to manage iconic objects or
control values.
1.2 Example Session
To get a first impression how to use HDevelop, you may have a look at the following example
session. Every important step during the image processing session is explained in detail. Thus,
having read this chapter thoroughly, you will understand the main HALCON ideas and concepts.
Furthermore, you will learn the main aspects of HDevelop’s graphical user interface (for
more details see chapter 2). A simple introduction can be found the in manual Getting Started
with HALCON as well.
In this example, the task is to detect circular marks attached to a person’s body in a gray value
image. The program can be found in the file
±ÀÄÇÆÊÇÇ̱ÜÑÔÐ×ÀÚÐÓÔÅÒÙÐ×ÀÚÐÓÔÑÖ׺Ú
You start HDevelop under Windows NT or Windows 2000 by calling
ËØÖØ º ÈÖÓÖÑ× º ÅÎÌ ÀÄÇÆ
º ÀÚÐÓÔ
Under UNIX, HDevelop is started from the shell like any other program 1 . Optionally, an application
name can be specified as a parameter:
ÚÐÓÔ ÐºÚ
This application is then loaded. This is identical to an invocation of HDevelop without any
parameter and a subsequent loading of the application. If you want to run the application immediately
after it has been loaded, invoke HDevelop as follows:
ÚÐÓÔ ¹ÖÙÒ ÐºÚ
This is equivalent to starting HDevelop, loading the application, and then pressing ÊÙÒ in the
menu bar of HDevelop.
After starting HDevelop, your first step is to load the image ÑÖ×ºØ from the directory
±ÀÄÇÆÊÇÇ̱Ñ×. You may perform this step in three different ways:
1 The necessary settings for the operation system are described in the manual Getting Started with HALCON.
HDevelop / 2000-11-16