Error in distance calculation by using Monocular Visual Simultaneous Localization and Mapping example

I am using MATLAB example Monocular Visual Simultaneous Localization and Mapping on my data sets. I have images of road scene and gps values. When using this example, it doesn't provide the exact or near to the distance travelled. Like on GPS the distance is like 50meters but from images it shows only 1-2 meters. Can any one help me if I need to adjust some other parameters.

Answer 1

[Shree Harsha Kodi]

When using the Monocular Visual Simultaneous Localization and Mapping (SLAM) example in MATLAB, the accuracy of the estimated distance traveled can be influenced by various factors like Camera Calibration, Feature Extraction and Matching, Motion Estimation Parameters, Sensor Fusion, Dataset Quality etc..,

Follow the documentation for a better understanding:

1)https://in.mathworks.com/help/vision/camera-calibration.html

2)https://in.mathworks.com/help/vision/feature-extraction-and-description.html

3)https://in.mathworks.com/help/fusion/index.html