How would I warp text around an image's edges?-CodePudding

I am trying to create an image with the edges replaced with text, similar to

1. Python Wand

(output size determined automatically from input size)

from wand.image import Image
from wand.font import Font
from wand.display import display

with Image(filename='some_text.png') as img:
    img.background_color = 'white'
    img.virtual_pixel = 'white'
    # 360 degree arc, rotated 0 degrees
    img.distort('arc', (360,0))
    img.save(filename='some_text_arc.png')
    img.format = 'png'
    display(img)

Result:

2. Python/OpenCV

import numpy as np
import cv2
import math

# read input
img = cv2.imread("some_text.png")
hin, win = img.shape[:2]
win2 = win / 2

# specify desired square output dimensions and center
hout = 100
wout = 100
xcent = wout / 2
ycent = hout / 2
hwout = max(hout,wout)
hwout2 = hwout / 2

# set up the x and y maps as float32
map_x = np.zeros((hout, wout), np.float32)
map_y = np.zeros((hout, wout), np.float32)

# create map with the arc distortion formula --- angle and radius
for y in range(hout):
    Y = (y - ycent)
    for x in range(wout):
        X = (x - xcent)
        XX = (math.atan2(Y,X) math.pi/2)/(2*math.pi)
        XX = XX - int(XX 0.5)
        XX = XX * win   win2
        map_x[y, x] = XX
        map_y[y, x] = hwout2 - math.hypot(X,Y)

# do the remap  this is where the magic happens
result = cv2.remap(img, map_x, map_y, cv2.INTER_CUBIC, borderMode = cv2.BORDER_CONSTANT, borderValue=(255,255,255))

# save results
cv2.imwrite("some_text_arc.jpg", result)

# display images
cv2.imshow('img', img)
cv2.imshow('result', result)
cv2.waitKey(0)
cv2.destroyAllWindows()

Result:

CodePudding user response：

Neither OpenCV nor PIL has a way to do that, but you can use ImageMagick. How to warp an image to take shape of path with python?