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定位色块常用到hsv色彩空间下的颜色阈值,笔者曾经用openmv时,其IDE有自带一个阈值编辑器,使用起来非常方便,现在在linux上跑cv算法,需要类似的功能,因此自己写了一个阈值编辑器。 目前暂时只支持HSV色彩空间下的阈值编辑。
代码:
mian.py:
from threshold_ui import Ui_Widget from PyQt5.QtWidgets import QApplication from PyQt5.QtGui import QImage,QPixmap,QFont from PyQt5 import QtWidgets import sys import cv2 import numpy as np class Threshold_Value_Edit(QtWidgets.QWidget,Ui_Widget): def __init__(self): #UI初始化 super(Threshold_Value_Edit,self).__init__() self.setupUi(self) self.setWindowTitle("阈值编辑器") img_path = r'D:\Pictures\screenshot.png' ft=QFont() ft.setPointSize(12) self.horizontalSlider.setMaximum(255) self.horizontalSlider_2.setMaximum(255) self.horizontalSlider_3.setMaximum(255) self.horizontalSlider_4.setMaximum(255) self.horizontalSlider_5.setMaximum(255) self.horizontalSlider_6.setMaximum(255) self.horizontalSlider.setValue(255) self.horizontalSlider_3.setValue(255) self.horizontalSlider_5.setValue(255) self.label.setText("H最大值:"+str(self.horizontalSlider.value())) self.label_2.setText("H最小值:"+str(self.horizontalSlider_2.value())) self.label_3.setText("S最大值:"+str(self.horizontalSlider_3.value())) self.label_4.setText("S最小值:"+str(self.horizontalSlider_4.value())) self.label_5.setText("V最大值:"+str(self.horizontalSlider_5.value())) self.label_6.setText("V最小值:"+str(self.horizontalSlider_6.value())) self.label.setFont(ft) self.label_2.setFont(ft) self.label_3.setFont(ft) self.label_4.setFont(ft) self.label_5.setFont(ft) self.label_6.setFont(ft) self.lineEdit.setText("HSVmin: HSVmax:") self.lineEdit.setFont(ft) self.img = cv2.imread(img_path) self.label_image_show(self.img) self.horizontalSlider.valueChanged[int].connect(self.horizontalSlider1_changeValue) self.horizontalSlider_2.valueChanged[int].connect(self.horizontalSlider2_changeValue) self.horizontalSlider_3.valueChanged[int].connect(self.horizontalSlider3_changeValue) self.horizontalSlider_4.valueChanged[int].connect(self.horizontalSlider4_changeValue) self.horizontalSlider_5.valueChanged[int].connect(self.horizontalSlider5_changeValue) self.horizontalSlider_6.valueChanged[int].connect(self.horizontalSlider6_changeValue) def label_image_show(self,img): if(len(img.shape)==2): img = cv2.merge([img,img,img]) height, width, bytesPerComponent = img.shape #返回的是图像的行数,列数,色彩通道数 bytesPerLine = 3 * width #每行的字节数 cv2.cvtColor(img, cv2.COLOR_BGR2RGB, img) QImg = QImage(img.data, width, height, bytesPerLine, QImage.Format_RGB888) pixmap = QPixmap.fromImage(QImg) self.label_7.setPixmap(pixmap) #print(img.shape[0],img.shape[1]) self.label_7.update() def horizontalSlider1_changeValue(self): #更新画板和滑条前的label self.label.setText("H最大值:"+str(self.horizontalSlider.value())) self.change_lineedit_value() self.HSV_img_change() def horizontalSlider2_changeValue(self): self.label_2.setText("H最小值:"+str(self.horizontalSlider_2.value())) self.change_lineedit_value() self.HSV_img_change() def horizontalSlider3_changeValue(self): self.label_3.setText("S最大值:"+str(self.horizontalSlider_3.value())) self.change_lineedit_value() self.HSV_img_change() def horizontalSlider4_changeValue(self): self.label_4.setText("S最小值:"+str(self.horizontalSlider_4.value())) self.change_lineedit_value() self.HSV_img_change() def horizontalSlider5_changeValue(self): self.label_5.setText("V最大值:"+str(self.horizontalSlider_5.value())) self.change_lineedit_value() self.HSV_img_change() def horizontalSlider6_changeValue(self): self.label_6.setText("V最小值:"+str(self.horizontalSlider_6.value())) self.change_lineedit_value() self.HSV_img_change() def change_lineedit_value(self): self.lineEdit.setText("HSVmin:["+str(self.horizontalSlider_2.value())+","+str(self.horizontalSlider_4.value())+","+str(self.horizontalSlider_6.value())+"] HSVmax:["+str(self.horizontalSlider.value())+","+str(self.horizontalSlider_3.value())+","+str(int(self.horizontalSlider_5.value()))+"]") def HSV_img_change(self): hsv_min = np.array([self.horizontalSlider_2.value(),self.horizontalSlider_4.value(),self.horizontalSlider_6.value()]) hsv_max = np.array([self.horizontalSlider.value(),self.horizontalSlider_3.value(),self.horizontalSlider_5.value()]) hsv = cv2.cvtColor(self.img, cv2.COLOR_BGR2HSV) # 转化成HSV图像 erode_hsv = cv2.erode(hsv, None, iterations=8) # 腐蚀 细的变粗 inRange_hsv = cv2.inRange(erode_hsv,hsv_min,hsv_max) self.label_image_show(inRange_hsv) print("hsv_min:") print(hsv_min) print("hsv_max:") print(hsv_max) if __name__ == '__main__': app = QtWidgets.QApplication(sys.argv) w = Threshold_Value_Edit() w.__init__() w.show() sys.exit(app.exec_())
threshold_ui.py:
# -*- coding: utf-8 -*- # Form implementation generated from reading ui file 'widget.ui' # # Created by: PyQt5 UI code generator 5.9.2 # # WARNING! All changes made in this file will be lost! from PyQt5 import QtCore, QtGui, QtWidgets class Ui_Widget(object): def setupUi(self, Widget): Widget.setObjectName("Widget") Widget.resize(942, 247) self.horizontalLayout = QtWidgets.QHBoxLayout(Widget) self.horizontalLayout.setContentsMargins(11, 11, 11, 11) self.horizontalLayout.setSpacing(6) self.horizontalLayout.setObjectName("horizontalLayout") self.label_7 = QtWidgets.QLabel(Widget) self.label_7.setObjectName("label_7") self.horizontalLayout.addWidget(self.label_7) self.formLayout = QtWidgets.QFormLayout() self.formLayout.setSpacing(6) self.formLayout.setObjectName("formLayout") self.label = QtWidgets.QLabel(Widget) self.label.setObjectName("label") self.formLayout.setWidget(0, QtWidgets.QFormLayout.LabelRole, self.label) self.horizontalSlider = QtWidgets.QSlider(Widget) self.horizontalSlider.setOrientation(QtCore.Qt.Horizontal) self.horizontalSlider.setObjectName("horizontalSlider") self.formLayout.setWidget(0, QtWidgets.QFormLayout.FieldRole, self.horizontalSlider) self.label_2 = QtWidgets.QLabel(Widget) self.label_2.setObjectName("label_2") self.formLayout.setWidget(1, QtWidgets.QFormLayout.LabelRole, self.label_2) self.horizontalSlider_2 = QtWidgets.QSlider(Widget) self.horizontalSlider_2.setOrientation(QtCore.Qt.Horizontal) self.horizontalSlider_2.setObjectName("horizontalSlider_2") self.formLayout.setWidget(1, QtWidgets.QFormLayout.FieldRole, self.horizontalSlider_2) self.label_3 = QtWidgets.QLabel(Widget) self.label_3.setObjectName("label_3") self.formLayout.setWidget(2, QtWidgets.QFormLayout.LabelRole, self.label_3) self.horizontalSlider_3 = QtWidgets.QSlider(Widget) self.horizontalSlider_3.setOrientation(QtCore.Qt.Horizontal) self.horizontalSlider_3.setObjectName("horizontalSlider_3") self.formLayout.setWidget(2, QtWidgets.QFormLayout.FieldRole, self.horizontalSlider_3) self.label_4 = QtWidgets.QLabel(Widget) self.label_4.setObjectName("label_4") self.formLayout.setWidget(3, QtWidgets.QFormLayout.LabelRole, self.label_4) self.horizontalSlider_4 = QtWidgets.QSlider(Widget) self.horizontalSlider_4.setOrientation(QtCore.Qt.Horizontal) self.horizontalSlider_4.setObjectName("horizontalSlider_4") self.formLayout.setWidget(3, QtWidgets.QFormLayout.FieldRole, self.horizontalSlider_4) self.label_5 = QtWidgets.QLabel(Widget) self.label_5.setObjectName("label_5") self.formLayout.setWidget(4, QtWidgets.QFormLayout.LabelRole, self.label_5) self.horizontalSlider_5 = QtWidgets.QSlider(Widget) self.horizontalSlider_5.setOrientation(QtCore.Qt.Horizontal) self.horizontalSlider_5.setObjectName("horizontalSlider_5") self.formLayout.setWidget(4, QtWidgets.QFormLayout.FieldRole, self.horizontalSlider_5) self.label_6 = QtWidgets.QLabel(Widget) self.label_6.setObjectName("label_6") self.formLayout.setWidget(5, QtWidgets.QFormLayout.LabelRole, self.label_6) self.horizontalSlider_6 = QtWidgets.QSlider(Widget) self.horizontalSlider_6.setOrientation(QtCore.Qt.Horizontal) self.horizontalSlider_6.setObjectName("horizontalSlider_6") self.formLayout.setWidget(5, QtWidgets.QFormLayout.FieldRole, self.horizontalSlider_6) self.lineEdit = QtWidgets.QLineEdit(Widget) self.lineEdit.setObjectName("lineEdit") self.formLayout.setWidget(6, QtWidgets.QFormLayout.SpanningRole, self.lineEdit) self.horizontalLayout.addLayout(self.formLayout) self.retranslateUi(Widget) QtCore.QMetaObject.connectSlotsByName(Widget) def retranslateUi(self, Widget): _translate = QtCore.QCoreApplication.translate Widget.setWindowTitle(_translate("Widget", "Widget")) self.label_7.setText(_translate("Widget", "TextLabel")) self.label.setText(_translate("Widget", "H最大值")) self.label_2.setText(_translate("Widget", "H最小值")) self.label_3.setText(_translate("Widget", "S最大值")) self.label_4.setText(_translate("Widget", "S最小值")) self.label_5.setText(_translate("Widget", "V最大值")) self.label_6.setText(_translate("Widget", "V最小值"))
第二份代码保存为threshold_ui.py,第一份可保存为任意文件名.py,放到同一目录下,运行第一份代码即可,img_path需修改为目标图片的绝对路径。
程序界面截图:
阈值选取:
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