book

Practical Guide to Machine Vision Software: An Introduction with LabVIEW

by Kye-Si Kwon, Steven Ready

April 2015

Beginner

296 pages

7h 8m

English

Wiley-VCH Verlag

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1.1 Digital Images1.2 Components of Imaging System
2.1 Acquiring Images with MAX2.2 Acquiring Images Using LabVIEW
3.1 Particle Analysis Using Vision Assistant3.2 LabVIEW Code Creation Using Vision Assistant3.3 LabVIEW Code Modification3.4 Particle Analysis Using Vision Express3.5 Conversion of Pixels to Real-World UnitsExercise 3.1Exercise 3.2Exercise 3.3
4.1 Edge Detection via Vision Assistant4.2 LabVIEW Code for Edge Detection4.3 VI for Real-Time-Based Edge Detection4.4 The Use of Vision Assistant Express for Real-Time Edge DetectionExercise 4.1Exercise 4.2

5.1 Pattern Matching Using Vision Assistant5.2 LabVIEW Code Creation and Modification5.3 Main VI for Pattern Matching5.4 Vision Assistant ExpressExercise 5.1Exercise 5.2
6.1 Color Pattern Matching Using Vision Assistant ExpressExercise 6.1
7.1 Dimension Measurement Using Vision Assistant Express7.2 VI Creation for Dimension MeasurementExercise 7.1
8.1 Measurement Based on a Reference Coordinate System Using Vision Assistant Express8.2 Conversion of Vision Assistant Express to a Standard VIExercise 8.1
9.1 Geometric Matching Using Vision Assistant Express9.2 VI Creation for Geometric Matching9.3 Shape DetectionExercise 9.1
10.1 Accessing Previously Saved Images with Vision Acquisition Express10.2 Binary Shape Matching Using Vision Assistant10.3 Overlay VI Creation for Shape Matching10.4 VI for Binary Shape MatchingExercise 10.1
11.1 OCR Using Vision Assistant11.2 VI for OCRExercise 11.1Exercise 11.2
12.1 Vision Acquisition Express to Load Image Files12.2 Vision Assistant Express for Classification12.3 VI Modification12.4 Overlay for Classification12.5 Main VI for ClassificationExercise 12.1
13.1 Contour Analysis13.2 VIs for Contour AnalysisExercise 13.1
14.1 Method for Creating an Image Correction File14.2 Image CorrectionExercise 14.1
15.1 Saving Image15.2 Image Read from FileExercise 15.1: Image save
16.1 AVI File Creation Using Image Files16.2 AVI File Creation Based on Real-Time Image Acquisition16.3 Read Frame from AVI FilesExercise 16.1
17.1 Tracking with the Use of Vision Assistant17.2 VI Creation for Tracking ObjectsExercise 17.1
18.1 Semiconductor Manufacturing18.2 Automobile Industry18.3 Medical and Bio Applications18.4 Inspection18.5 Industrial Printing
Project 1: Noncontact Motion Measurement and Its AnalysisProject 2: Intelligent Surveillance CameraProject 3: Driving a LEGO NXT Car (LEGO Mindstorms) with Finger MotionProject 4: Piano Keyboard Using Machine Vision

Content preview from Practical Guide to Machine Vision Software: An Introduction with LabVIEW

16AVI File Write and Read

The AVI (Audio Video Interleaved) file format contains audio and video information within a single file. The audio part will not be discussed here. We will mainly be focusing on video and image aspects of AVI files. Specifically, methods to create AVI file from image files and read image frames from AVI file will be discussed in detail.

16.1 AVI File Creation Using Image Files

In Chapter 15, images acquired using LabVIEW were saved in sequential order. In this section, these sequential images are used to make an AVI file. Figure 16.1 shows the block diagram for making an AVI file using the saved images.

**Figure 16.1** Block diagram for making an AVI file using existing image files.

As seen in Figure 16.1, two paths are used: one folder path from which to read image files and another to save the image sequence as an AVI file. From Figure 16.1 , the Recursive File List.vi retrieves the number of files found in a folder and is used to specify the number of files read in using a FOR loop. All these images in the folder are then read using the Image Read function in sequential order via an indexed FOR loop. Each image from the folder of previously stored image ...