Dear All,
I found an article with topic: ADAS Front Camera: Demystifying Resolution and Frame-Rate by Mihir Mody Senior Principle Architect Automotive Processor, Texas Instruments
The link to the article is: http://www.eetimes.com/author.asp?section_id=36&doc_id=1329109
I have some unclear points about the equations used in calculations in table 1 - MPixel and Distance calculator.
The proposed basic geometry equation is:
tan(FOV/2) = (O - H/2)/d = (S - H/2)/F
Where:
Lens parameters:
FOV - field of view, - usually horizontal FOV in degrees
F - Focal length, - millimeters
Sensor Parameters:
O - optical format - usually in inches e.g. 1/256"
Object parameters:
H - height of the detected object, in meters
Output result:
d - Distance to the detected object
# However, there is no explanation about the parameter S - would it be possible to point me what is its meaning?
The information in Table 1 is not clear explained to use the table for practical use cases. There are no explanations about using of other inputs parameters colored in rose in table 1:
How should use in calculations following parameters:
Resolution, Typical pixel size and Algorithm parameters (Feature use and Model Height)
I have tried to recalculate the examples in table 1 but my results are totally different than the TI's ones.
Would it be possible to provide more explanations about the equations used in Table 1?
Thanks in advance!
Best regards,
Yanko
