python柱面投影
时间: 2023-11-03 16:00:06 浏览: 94
柱面投影是一种图像处理技术,可以将平面图像投影到柱面上,从而产生图像扭曲的效果。柱面投影可以用于图像拼接、全景图制作等应用。在Python中实现柱面投影可以使用skimage库的cylindrical_projection函数。以下是一个简单的柱面投影的Python实现代码:
```python
from skimage.io import imread, imshow, imsave
from skimage.transform import resize
import math
import numpy as np
def cylindrical_projection(img, f):
rows = img.shape[0]
cols = img.shape[1]
blank = np.zeros_like(img)
center_x = int(cols / 2)
center_y = int(rows / 2)
for y in range(rows):
for x in range(cols):
theta = math.atan((x - center_x) / f)
point_x = int(f * math.tan((x - center_x) / f) + center_x)
point_y = int((y - center_y) / math.cos(theta) + center_y)
if point_x >= cols or point_x < 0 or point_y >= rows or point_y < 0:
pass
else:
blank[y, x, :] = img[point_y, point_x, :]
return blank
img = imread('img.jpg')
img = (resize(img, [1000, 800]) * 255).astype(np.uint8)
waved_img = cylindrical_projection(img, 500)
imshow(waved_img)
```