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Perspective and Equirectangular

Introduction

<strong> Perspective and Equirectangular </strong> is a python code to help you transfer image between equirectangular and perspective. Four transfer is in the list. This code is modify by fuenwang/Equirec2Perspec

1. equirectangular to perspective.
2. perspective to equirectangular.
3. equirectangular to cube.
4. cube to equirectangular.

Equirectangular to Perspective

Given an input of 360 degree panorama

equ = E2P.Equirectangular(input_img)    # Load equirectangular image
img = equ.GetPerspective(120, 0, 0, 1280, 1280)  # Specify parameters(FOV, theta, phi, height, width)
output1 = output_dir +  '/perspective_1.png'
cv2.imwrite(output1, img)

Run: python equir2pers.py.

Perspective to Equirectangular

Given multiple perspective images and infromation(FOV, theta, phi, height, width).
If the equirectangle image is overlapping, the pixel calculate the average in multiple image.

<img width="200" height="200" src="example/perspective/perspective_1.png"> <img width="200" height="200" src="example/perspective/perspective_2.png">
Setting the image information (FOV, theta, phi) in the code <strong>pers2equir.py</strong>.

input1 = input_dir + '/perspective_1.png'
input2 = input_dir + '/perspective_2.png'

equ = m_P2E.Perspective([input1,input2],
                        [[120, 0, 0],[120, 0, 90]])   #[FOV,theta,phi]
img = equ.GetEquirec(height,width)

Run: python pers2equir.py.

Panorama to Cube

Put image in ./panorama.

Run: python panorama2cube.py.
<img width="150" height="150" src="output/00/front.png"> <img width="150" height="150" src="output/00/right.png"> <img width="150" height="150" src="output/00/back.png">
<img width="150" height="150" src="output/00/left.png"> <img width="150" height="150" src="output/00/top.png"> <img width="150" height="150" src="output/00/bottom.png">

Cube to Panorama

Put image in ./in_path.
If you do not want to change code, remeber to set the image name (front,right,black,left,top,bottom).png.

Run: python panorama2cube.py --mode cube --input ./in_path --output ./out_path.