# Perspective-and-Equirectangular

**Repository Path**: zhjc1124/Perspective-and-Equirectangular

## Basic Information

- **Project Name**: Perspective-and-Equirectangular
- **Description**: No description available
- **Primary Language**: Python
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2022-01-15
- **Last Updated**: 2022-01-15

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# 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](https://github.com/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
<center><img src="panorama/world_map.jpeg"></center>
Setting the (FOV, theta, phi, height, width) in the code <strong>equir2pers.py</strong>

```
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```.

<center><img width="200" height="200" src="example/perspective/perspective_1.png"></center>

## 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```.
<center><img width="318" height="159" src="example/equirectangle/output.png"></center>

## Panorama to Cube
Put image in `./panorama`.   
<center><img src="panorama/world_map.jpeg"></center>

**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```.

<center><img src="output/output.png"></center>