National Instruments NI-IMAQ - page 35

Chapter4 Programmingwith NI-IMAQ for 1394 VIs

©NationalInstruments Corporation 4-9 NI-IMAQfor IEEE-1394 Cameras User Manual

animage acquired using IMAQ1394 Snap. You can display images in the

sameway using any acquisition type. For more informat ion on the display

capabilities of IMAQVision, consult the IMAQ Vision for LabVIEW

UserMan ual.

Figure4-8. Displayingan Image Using IMAQ WindDraw

Ifyou do not have IMAQ Vision, you can display an imageon a

LabVIEW Intensity Graph for 8-bit and 16-bit monochrome images or on

ap icture control for RGB images.

Beforeyou can properly display an image onan Intensity Graph, you need

to make some minor changes to the default properties of the Intensity

Graph.Perform th efoll owingsteps to modify the properties:

1. Placethe Intensity Graph o n the front panel, pop up on the graph, and

choose TransposeArray.

2. Createthe correct grayscale color palette by popping up on the marker

labeled 50 on the color ramp and choosing Delete Marker.Also,

changethe maximum value on the color palette from 100 to the

maximump ixelvalue in your image—255 for 8-bit im ages,1 ,023 for

10-biti mages, and 4,095 for 12-bit images.

3. Invertthe y-axis. You might also need to change the ranges of the

x-and y-axes to match the width and height of the image.

Contents

Main Page Important Information Warranty Copyright Trademarks WARNINGREGARDING USE OF NATIONAL INSTRUMENTS PRODUCTS Conventions Contents Chapter 1 Introduction to NI-IMAQ for IEEE-1394 Cameras Chapter 2 Software Overview Chapter 3 Programming with NI-IMAQ for 1394 Chapter 4 Programming with NI-IMAQ for 1394 VIs Appendix A Technical Support Resources Glossary Index Introduction to NI-IMAQ for IEEE-1394 Cameras About the NI-IMAQ Software Application Development Environments Configuring YourIEEE-1394 Camera Fundamentals of Building Applications with NI-IMAQ for 1394 Architecture The NI-IMAQ Libraries Creating an Application Sample Programs Software Overview Generic Functions High-Level Functions Snap Functions Grab Functions Sequence Functions TriggerFunctions Low-Level Functions Acquisition Functions Attribute Functions Utility Functions Programming with NI-IMAQ for 1394 High-Level Functions Low-Level Functions Establishing Interface Connections Camera Functions Camera Attributes Scalable Image Size Introductory Programming Examples High-Level Snap Functions High-Level Grab Functions Page High-Level Sequence Functions Advanced Programming Examples Performing a Snap Using Low-Level Functions Performing a Grab Using Low-Level Functions Performing a Sequence Acquisition Using Low-Level Functions Performing an Asynchronous Snap Using Low-Level Functions Performing an Asynchronous Grab using Low-Level Functions Programming with NI-IMAQ for 1394 VIs Page Common NI-IMAQ for 1394 VI Parameters Buffer Management NI-IMAQ for 1394 Acquisition Types Snap Grab Sequence Acquisition VIs High-Level Low-Level Triggering Image Display Page Page Camera Attributes Error Handling Error Code Format Page A Technical Support Resources Web Support NI Developer Zone Customer Education System Integration Worldwide Support Glossary A B C D E F G H I K L M N O P R S T U Page Index A B C E L M N P S