python矢量图形和对应的图片坐标变换

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 python矢量图形和对应的图片坐标换算

import os
import numpy as np
import re
from pathlib import Path
output_folder='./data'
filename_lineEdge = r'./data/fx0022/dom1lines_Edge.txt'
filename_jgw = r'./data/fx0022/test/dom1.jgw'
#读取线段文件
data = []
i = 0
with open(filename_lineEdge, 'r') as f:
    lines = f.readlines()
    for item in lines:
        #print(item.strip())
        out = re.sub(r"\s{2,}", " ", item).strip()
        #print(out)
        res = out.split(" ")
        if i == 0:
            data = np.expand_dims(res, axis=0)
            i = i + 1
        else:
            data = np.concatenate((data, np.expand_dims(res, axis=0)), axis=0)

data = np.array(data).astype(np.float64)
print(data.shape)
#读取jgw文件
if os.path.isfile(filename_jgw):
    with open(filename_jgw, 'r') as fjpw:
        lines_jgw = fjpw.readlines()
    resolution = float(lines_jgw[0])
    topleftX = float(lines_jgw[4])
    topleftY = float( lines_jgw[5])
else:
    resolution = 1.0
    topleftX = 0
    topleftY = 0
print(resolution)
print(topleftX)
print(topleftY)

#坐标变换
f_newEdge= output_folder+'/{}{}'.format(str(Path(filename_lineEdge).stem),'_edge.txt')
with open(f_newEdge,'w' ) as newlineEdgeFile:
    for element in data:
        print(element)
        fromX=topleftX+element[2]*resolution
        fromY=topleftY-element[0]*resolution
        toX=topleftX+element[3]*resolution
        toY=topleftY-element[1]*resolution
        new_Line=[fromX, fromY, toX, toY]
        print('转换后{}'.format(new_Line))
        newlineEdgeFile.writelines('{} {} {} {}\n'.format(fromY,toY,fromX,toX))