3D Geographic coordinate to 2D pixel coordinate

[ManishSahu]

I want to transform a point given in geographic coordinate(Lat,Long,Ele) system to Pixel location(x,y) of image. I have processed images with agisoft and exported camera details like omega,phi,kappa, r11,r12,r13 etc. as text. Now I have a point which I want to convert to image pixel coordinate using python without using agisoft inbuilt function. Can you tell me how to do this?
For example I have attached, camera output file from agisoft. I have a coordinate Lat = 31.099338018;Long = 77.17603616;
Elevation = 2197.3547 and convert this into pixel coordinate.
Note - I have attached camera file with this post

[ManishSahu]

I have tried following method
1. Point P, Lat, Long to ECEF coordinate system
2. Pw in world coordinate to P in camera coordinate using Pc = inv(R)*P. Where R is rotational matrix and P is point in ECEF
3. Then Camera coordinate to pixel coordinate using K*Pc. Where K is [f,0,cx;0,f,cy;0,0,1]

I searched web also and found above pipeline. But It is not working correctly.
Coordinate which I got using agisoft internal functions are 2393.17, 3641.62 at image DSC04045_geotag.JPG but using my method I am not getting similar results