ENVI Experiment Tutorial (3) Remote Sensing Image Preprocessing - Geometric Correction

Experiment 3. Remote Sensing Image Preprocessing—Geometric Correction

1. Purpose of the experiment

1. Familiar with the main process and key steps of geometric correction
2. Proficiency in ENVI commonly used geometric correction tools
3. Master the selection of ENVI ground control points GCPs and the geometric correction process of different modes.
   2. Basic requirements of the experiment
4. Carefully read and master the procedure of this experiment.
5. The operation and application of the geometric correction module on the computer.
6. Save and record the experimental results, and analyze and summarize.
   3. Experiment time and place
7. Place:
8. Time:
   4. Experimental conditions
9. Hardware: PC computer (Windows10 operating system)
10. Software: ENVI 5.3
11. Reference material: Chapter 4 of "ENVI Remote Sensing Image Processing Method"
12. Data used: ...\Chapter 4 Remote Sensing Image Preprocessing\ 3-Geometric Correction
    V. Experimental content
13. Image to image Geometric correction
    VI. Notes
    1. Pay attention to the determination of the number of GCPs when selecting control points.
    2. Accuracy control of geometric correction.
    7. Experimental steps
    1. Start>Program>ENVI5.1>Tools>ENVI Classic, main menu>File>Open Image File, open the SPOT (bldr_sp.img) and TM image (bldr_tm.img) files, and display them respectively Show two images in
    

2 Main menu>Map>Registration>Select GCPs:Image to Image, open the geometric correction module.
3 Select the Display that displays the SPOT file as the base image (Base Image), and the Display that displays the TM file as the image to be corrected (Warp Image), and click OK to enter the collection of ground control points.

After selecting a certain number of control points (at least 3), you can use the automatic point finding function.


Click the Show List button on the Ground Control Points Selection to see a list of all selected controls.

Select the correction parameter output

Check calibration results