UE4_landscape_tiler.py

import cv2
import sys
import numpy as np

#config
outputSize = 1017

image = cv2.imread('in.png', cv2.IMREAD_UNCHANGED)
dimensions = image.shape

# height, width, number of channels in image
height = image.shape[0]
width = image.shape[1]
 
print('heightmap Height       : ',height)
print('heightmap Width        : ',width)

#imS = cv2.resize(image, (512, 512))
#cv2.imshow("original (512 resize)", imS)

x_name = 0
x = 0
while x+outputSize < width:
	y = 0
	y_name = 0
	while y+outputSize < height:
		out_file_name = "IMG_X" + str(x_name) + "_Y" + str(y_name) + ".png"
		print("Currently rendering " + out_file_name)
		crop_image = image[y:y+outputSize, x:x+outputSize]
		cv2.imwrite(out_file_name, crop_image.astype(np.uint16))
		y+=outputSize-1
		y_name+=1
	x+=outputSize-1
	x_name+=1

cv2.waitKey(0)

This is a great find, but i have another question, is there a way to use same script but in reverse?
Meaning i have the tiles in RAW format of 32-bit floating points, and I'd like to merge them back to a single height map and then to slice them for UE using script above since i no longer have the original large single height map.
Is there a way you could help at all?
The tiles i have are 257x257 and must overlap by 1 pixel.
The end result will not be a power of 2 height map.