What Does an Imagery Analyst Do?

Image analysis refers to a technique that uses a camera or the like to capture work operation movements, record people's movements, and analyze and research through projection. According to the difference in shooting speed, the audio and video analysis is divided into subtle motion analysis and slow photography motion analysis. It has the characteristics of high accuracy, repeatability, and easy operation. It is suitable for operation analysis with short product cycles, high complexity, and complicated actions. ^[1]

Image analysis refers to the process of analyzing the image from the physical, chemical, geometric and other characteristics and imaging mechanisms of ground objects or phenomena, using the laws of geology, biology, and environmental science to identify the ground objects or phenomena and their relationships. More broadly than interpretation and interpretation. Based on modern remote sensing technology, the following technological advances have been made: There are various remote sensing methods. From aerial photography in the era of photo interpretation, to a variety of remote sensing technologies with aviation and aerospace, photography and scanning, imaging and non-imaging, analog and digital, etc .; The types of remote sensing data are more diverse. Such as color infrared, multi-band, infrared, ultraviolet, microwave, laser, fluorescence, etc .; analysis technology is more advanced. From visual interpretation with the help of stereoscopic mirrors, to the use of techniques such as color synthesis, density segmentation, computer image enhancement, calculation, correction, and automatic classification; analysis methods have developed comprehensively and systematically. Multi-data based on multi-platform, multi-temporal, multi-band

make up for the limitation of human analysis ability;

Measure the time value of difficult-to-observe work cycles (such as less repetitive, long-cycle work, etc.);

It is used to record the true state of the scene;

Present the situation of the operation site in other places for everyone to discuss;

Persuade and explain to relevant personnel. ^[2]

There are two methods of image analysis, namely slow motion analysis and fine motion image analysis.

Image Analysis Slow Motion Analysis

Features: You can observe and analyze the working process in a short time (photograph or video at a slower speed than usual (typically 60 frames / min or 100 frames / min), and then reproduce the captured content (24 frames / s)); Need to choose a special slow-motion camera motion analysis instrument.

use:

Accurately find out the occurrence of various events (such as failure, start, stop, and transportation) through fast or slow reproduction of images;

Use the video timer during recording or reproduction to accurately find out the time interval between incidents (such as the arrival time of products, parts, etc., and the occurrence time of defective products);

the duration of the event, such as maintenance time, waiting time;

the number of incidents, such as the number of handling;

The time ratio of the event, such as labor utilization rate;

Interrelationships of events, such as joint operations, mechanical interference, and multiple caretakers;

Count the number of occurrences of events, such as the amount of intermediate inventory, the length of waiting rows, you can stop the screen to count, and also count the maximum and minimum amount;

The path of the event, the work route, the transport route.

Slow photography method (step):

Determine the operation target of the analysis destination;

Determine which part of the analysis content in the analysis work;

Determine the time interval of each step of the shooting screen, the selection values are 0.6s, 1s, 2s, 3s;

explain the purpose of photography to the operator, and get the support of the operator;

Determine the position of the camera, generally choose to observe the scene of the scene without affecting the operation;

Install and adjust the camera;

Photograph the work content within the analysis range.

Slow photography analysis method:

Rough analysis

Reproduce images at ordinary speed;

Record problems while watching images;

(A. Are there too many activities of the operator and the material? B. Are the activities of the operator and the material too wide? C. Are there unnecessary repetitive actions? D. Are the operators' waiting time too long? Is the operator facing at a certain speed; f. Is the workpiece moving too much?);

If there is a problem, point out to watch it repeatedly and discuss the countermeasures together.

2. Detailed analysis

Manually feed and reproduce images, divide the actions of operators, count the number of screens for each job content, and fill in the image analysis form;

Find the number of screens for each job content;

Find the time value of each operation.

After completing the image analysis form, fill in the slow motion analysis form;

Manually feed again, reproduce the image, and use the streamline diagram to represent the operator's activities in the scene layout diagram;

Discuss the analysis results and specify improvement plans. ^[3]

Image Analysis Fine Motion Image Analysis

Features: It is also called high-speed photographic analysis. In contrast to man-colored image motion analysis, it is a motion analysis method that uses high-speed camera, photography and other equipment to perform detailed analysis of work motion photography (image).

use:

Analysis of fast movements that cannot be tracked by the naked eye;

Detailed analysis of operations in natural state;

Used to correctly determine the time value of fast action;

Correctly measure the length of the action path;

used to collect the data required for the specified work standards;

Training for action research.

Recording procedures or photographic steps:

Clarify the purpose, goal and content of photography (image);

Prepare equipment (camera, camera (video), video recorder, video timer, etc.);

Get on-site support and make full explanations and explanations to the person being photographed;

conduct trial shooting or formal shooting;

(Note: a. Choose a camera (image) that takes 1000 frames per minute; b. To facilitate later analysis, a counter reading should be added to each photo; c. Pay attention to the angle, which means that all relevant photos can be taken Actions);

Reappear to the operator according to the situation.

Analysis of the image:

Watch all videos or videotapes, and select a typical and complete operation cycle (all the action series from the first action to the last action) from the movie (videotape);

Convert the data on the film (videotape) into written data, and study each picture (the start time (the time of the first frame of the basic action or the counter reading), the motion symbol, and the description of the action On the analysis chart);

Analyze the work in the same way as the kinetic analysis. ^[3]