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rasterpath.py
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import sys, os
from rasterpathUI import Ui_Dialog
from PyQt5.QtWidgets import QDialog, QMessageBox, QGraphicsPixmapItem, QGraphicsScene, QFileDialog
from PyQt5.QtGui import QPixmap, QImage
from PyQt5.QtCore import QStringListModel, pyqtSignal
from qgis.core import *
import gdal
import math
import cv2
import numpy as np
class Func_ratserpath_class(QDialog, Ui_Dialog):
mySignal = pyqtSignal(int)
def __init__(self, layers):
super(Func_ratserpath_class, self).__init__()
self.setupUi(self)
self.slot_connect()
self.layers = layers
self.success = False
self.loadmap = False
self.ras_height = 0
self.ras_width = 0
self.num_x = 0
self.num_y = 0
self.box_scale.setEnabled(False)
self.box_scale.setPlainText('Height: '+str(self.ras_height)+'px Width: '+str(self.ras_width)+'px')
self.x_Box.setEnabled(False)
self.y_Box.setEnabled(False)
self.runButton.setEnabled(False)
self.chooseButton.setEnabled(False)
self.pathEdit.setEnabled(False)
self.plainTextEdit.setEnabled(False)
for item in layers:
self.rasterBox.addItem(item.name())
def slot_connect(self):
self.rasterBox.activated.connect(self.choose_raster_changed)
self.x_Box.valueChanged.connect(self.get_value_x)
self.y_Box.valueChanged.connect(self.get_value_y)
self.runButton.clicked.connect(self.processing_flow_path)
self.chooseButton.clicked.connect(self.action_choose_path)
def action_choose_path(self):
file_choose, file_type = QFileDialog.getSaveFileName(self, "Raster Saving", "./processImage/","Tiff Files (*.tif)")
self.save_path = file_choose
self.pathEdit.setText(file_choose)
self.runButton.setEnabled(True)
def mouse_press_pixel(self, event):
event = event.scenePos()
self.x_Box.setValue(event.y())
self.y_Box.setValue(event.x())
self.plainTextEdit.setPlainText(str(self.band[self.x_Box.value()][self.y_Box.value()]))
def choose_raster_changed(self):
choose_index = self.rasterBox.currentIndex()
if self.layers[choose_index].bandCount() != 1:
QMessageBox.critical(self, "Error", "One band raster is needed", QMessageBox.Yes)
return
target_raster = self.layers[choose_index]
self.transform_raster_type(target_raster)
def get_value_x(self):
self.num_x = self.x_Box.value()
self.plainTextEdit.setPlainText(str(self.band[self.num_x][self.num_y]))
def get_value_y(self):
self.num_y = self.y_Box.value()
self.plainTextEdit.setPlainText(str(self.band[self.num_x][self.num_y]))
def transform_raster_type(self, raster):
dataSource = gdal.Open(raster.source())
self.projection = dataSource.GetProjection()
self.geoTransform = dataSource.GetGeoTransform()
self.band = np.array(dataSource.GetRasterBand(1).ReadAsArray())
self.ras_height, self.ras_width = self.band.shape
self.box_scale.setPlainText('Height: ' + str(self.ras_height) + 'px' + ' Width: ' + str(self.ras_width)+'px')
self.x_Box.setEnabled(True)
self.y_Box.setEnabled(True)
self.x_Box.setRange(1, self.ras_height-1)
self.y_Box.setRange(1, self.ras_width-1)
coloredImg = cv2.merge([self.band, self.band, self.band])
coloredImg = coloredImg.astype(np.uint8)
#coloredImg = cv2.normalize(coloredImg, None, 0, 255, cv2.NORM_MINMAX)
temp = cv2.cvtColor(coloredImg, cv2.COLOR_BGR2RGB)
#cv2.imwrite("./processImage/temp.bmp", temp)
#temp = cv2.imread("./processImage/temp.bmp")
frame = QImage(temp.data, temp.shape[1], temp.shape[0], 3*temp.shape[1], QImage.Format_RGB888)
print('load')
try:
pix = QPixmap.fromImage(frame)
except:
print('load faliled')
try:
os.remove("./processImage/temp.bmp")
except:
pass
return
print('load finished')
item = QGraphicsPixmapItem(pix)
self.scene = QGraphicsScene()
self.scene.addItem(item)
self.graphicsView.setScene(self.scene)
try:
os.remove("./processImage/temp.bmp")
except:
pass
self.scene.mousePressEvent=self.mouse_press_pixel
try:
os.remove("./processImage/temp.bmp")
except:
pass
self.chooseButton.setEnabled(True)
def processing_flow_path(self):
band = self.band
pointArrayX = [self.num_x-1]
pointArrayY = [self.num_y-1]
x = self.num_x-1
y = self.num_y-1
while True:
nowPoint = band[x][y]
print(nowPoint)
direction = [(float(nowPoint)-float(band[x-1][y-1]))/math.sqrt(2), float(nowPoint)-float(band[x][y-1]),
(float(nowPoint)-float(band[x+1][y-1]))/math.sqrt(2), float(nowPoint)-float(band[x+1][y]),
(float(nowPoint)-float(band[x+1][y+1]))/math.sqrt(2), float(nowPoint)-float(band[x][y+1]),
(float(nowPoint)-float(band[x-1][y+1]))/math.sqrt(2), float(nowPoint)-float(band[x-1][y])]
max_index = 0
max_num = -9999
for index in range(0, 8):
if max_num < direction[index]:
max_num = direction[index]
max_index = index
print(max_num,max_index)
if max_num < 0:
break
if max_num == 0:
flag = False
for itemX, itemY in zip(pointArrayX, pointArrayY):
if x == itemX and y == itemY:
flag = True
break
if flag:
break
if max_index == 0:
x = x - 1
y = y - 1
elif max_index == 1:
y = y - 1
elif max_index == 2:
x = x + 1
y = y - 1
elif max_index == 3:
x = x + 1
elif max_index == 4:
x = x + 1
y = y + 1
elif max_index == 5:
y = y + 1
elif max_index == 6:
x = x - 1
y = y + 1
else:
x = x - 1
if x < 1 or x > self.ras_height - 1 or y < 1 or y > self.ras_width - 1:
break
else:
pointArrayX.append(x)
pointArrayY.append(y)
if len(pointArrayX) < 20:
QMessageBox.warning(self, "warning", "path is too short", QMessageBox.Yes)
single_band = band
coloredImg = cv2.merge([single_band, single_band, single_band])
cv2.imwrite("./processImage/temp.bmp",coloredImg)
coloredImg = cv2.imread("./processImage/temp.bmp")
try:
os.remove("./processImage/temp.bmp")
except:
pass
for index in range(0, len(pointArrayX)-2):
cv2.line(coloredImg, (pointArrayY[index], pointArrayX[index]), (pointArrayY[index+1], pointArrayX[index+1]), (255, 0, 0), 3)
self.craete_tiff(np.array(coloredImg))
self.success = True
self.loadmap = True
self.mySignal.emit(1)
self.close()
def craete_tiff(self, target_img):
driver = gdal.GetDriverByName("GTiff")
datatype = 0
if 'int8' in target_img.dtype.name:
datatype = gdal.GDT_Byte
elif 'int16' in target_img.dtype.name:
datatype = gdal.GDT_UInt16
else:
datatype = gdal.GDT_Float32
outDs = driver.Create(self.save_path, target_img.shape[1], target_img.shape[0], target_img.shape[2], datatype)
outDs.SetGeoTransform(self.geoTransform)
outDs.SetProjection(self.projection)
outDs.GetRasterBand(1).WriteArray(target_img[:, :, 2])
outDs.GetRasterBand(2).WriteArray(target_img[:, :, 1])
outDs.GetRasterBand(3).WriteArray(target_img[:, :, 0])
del outDs
self.result = QgsRasterLayer(self.save_path)
QMessageBox.information(self, "success", "Task Finished!", QMessageBox.Yes)
def main():
qgs = QgsApplication([], True)
qgs.setPrefixPath('qgis', True)
qgs.initQgis()
layers = []
layers.append(QgsRasterLayer("./Image/1.tif", "1"))
layers.append(QgsRasterLayer("./Image/2.tif", "2"))
layers.append(QgsRasterLayer("./Image/3.tif", "3"))
layers.append(QgsRasterLayer("./Image/1/5.tif", "6"))
layers.append(QgsRasterLayer("./Image/dem.tif", "dem"))
window = Func_ratserpath_class(layers)
window.show()
exit_code = qgs.exec_()
qgs.exitQgis()
sys.exit(exit_code)
if __name__ == '__main__':
main()