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paint_board.py
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paint_board.py
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from PyQt5.QtWidgets import QWidget
from PyQt5.Qt import QPixmap, QPainter, QPoint, QPaintEvent, QMouseEvent, QPen,\
QColor, QSize
from PyQt5.QtCore import Qt
from PIL import Image, ImageQt
# from cv2 import findTransformECC
import numpy as np
# from torch._C import _cuda_resetAccumulatedMemoryStats
import copy
class PaintBoard(QWidget):
def __init__(self, Parent=None, bg_img = None):#bg_img为PIL格式
'''
Constructor
'''
super().__init__(Parent)
self.bg_img = bg_img
self.disp_img_longside = 800
if(self.bg_img!=None):
self.inp_img_w, self.inp_img_h = self.bg_img.size
if(self.inp_img_w >= self.inp_img_h):
self.disp_img_w = 800
self.disp_img_h = int(self.inp_img_h*(800.0/self.inp_img_w))
else:
self.disp_img_h = 800
self.disp_img_w = int(self.inp_img_w*(800.0/self.inp_img_h))
self.bg_img = self.bg_img.resize((self.disp_img_w, self.disp_img_h))
else:
self.inp_img_w, self.inp_img_h = 800, 800
self.disp_img_w = 800
self.disp_img_h = 800
self.bg_img = np.ones([self.disp_img_h, self.disp_img_w, 3]).astype(np.uint8)*255
self.bg_img = Image.fromarray(self.bg_img).convert('RGB')#转换为PIL格式
self.__InitData() #先初始化数据，再初始化界面
self.__InitView()
#绘图工具相关
self.__painter = QPainter()#新建绘图工具
self.__thickness = 10 #默认画笔粗细为10px
self.__penColor = QColor("black")#设置默认画笔颜色为黑色
self.__colorList = QColor.colorNames() #获取颜色列表
def __InitData(self):
self.__size = QSize(self.disp_img_w, self.disp_img_h)
#新建QPixmap作为画板，尺寸为__size
self.__board = QPixmap(self.__size)#这是主画板，缩放之后进行的绘制都要同步到这一张上来
self.__board.fill(Qt.gray) #用灰色填充画板
self.__IsEmpty = True #默认为空画板
self.EraserMode = False #默认为禁用橡皮擦模式
self.__lastPos = QPoint(0,0)#上一次鼠标位置
self.__currentPos = QPoint(0,0)#当前的鼠标位置
def __InitView(self):
#设置界面的尺寸为__size
self.setFixedSize(self.__size)
def Reset_paintboard(self, bg_img):#把新图片加载到画板上
self.bg_img = bg_img
self.inp_img_w, self.inp_img_h = self.bg_img.size
if(self.inp_img_w >= self.inp_img_h):
self.disp_img_w = 800
self.disp_img_h = int(self.inp_img_h*(800.0/self.inp_img_w))
else:
self.disp_img_h = 800
self.disp_img_w = int(self.inp_img_w*(800.0/self.inp_img_h))
self.bg_img = self.bg_img.resize((self.disp_img_w, self.disp_img_h))
self.__InitData() #先初始化数据，再初始化界面
self.__InitView()
self.update()
def Clear(self):
#清空画板
self.__board.fill(Qt.gray)
self.update()
self.__IsEmpty = True
def ChangePenColor(self, color="black"):
#改变画笔颜色
self.__penColor = QColor(color)
def ChangePenThickness(self, thickness=10):
#改变画笔粗细
self.__thickness = thickness
def IsEmpty(self):
#返回画板是否为空
return self.__IsEmpty
def GetContentAsQImage(self):
#获取画板内容（返回QImage）
image = self.__board.toImage()
return image
def GetContentAsPILImage(self):
#获取画板内容（返回PIL）
image = self.__board.toImage()
image_PIL = ImageQt.fromqimage(image)
image_array = np.array(image_PIL).astype(np.uint8)[:,:,::-1]#RGB转BGR
import cv2
image_array = cv2.resize(image_array, (self.inp_img_w, self.inp_img_h), interpolation=cv2.INTER_NEAREST)
image_PIL_resized = Image.fromarray(image_array[:,:,::-1]).convert('RGB')
# print("in", (self.inp_img_w, self.inp_img_h))
# image_PIL.resize((self.inp_img_w, self.inp_img_h), Image.NEAREST)
# print("out", image_PIL.size)
return image_PIL_resized
def paintEvent(self, paintEvent):
#绘图事件
#只要窗口部件需要被重绘就被调用 update可以调用
#绘图时必须使用QPainter的实例，此处为__painter
#绘图在begin()函数与end()函数间进行
#begin(param)的参数要指定绘图设备，即把图画在哪里
#drawPixmap用于绘制QPixmap类型的对象
self.__painter.begin(self)#表示在整个控件上画
# 0,0为绘图的左上角起点的坐标，__board即要绘制的图
#self.__draw_board转换为array
bg_qimage = self.__board.toImage()
bg_PIL = ImageQt.fromqimage(bg_qimage)
bg_array = np.array(bg_PIL)
#和self.local_bg_img融合
fuse = 0.5*bg_array+0.5*np.array(self.bg_img)
fuse_PIL = Image.fromarray(fuse.astype('uint8')).convert('RGB')
fuse_qimage = ImageQt.ImageQt(fuse_PIL)
#转换成Qpixmap显示
fuse_qpixmap = QPixmap.fromImage(fuse_qimage).scaled(self.disp_img_w, self.disp_img_h)
self.__painter.drawPixmap(0,0,fuse_qpixmap)
self.__painter.end()
def mousePressEvent(self, mouseEvent):
#鼠标按下时，获取鼠标的当前位置保存为上一次位置
self.__currentPos = mouseEvent.pos()
self.__painter.begin(self.__board)#表示在Qpixmap上画
if self.EraserMode == False:
#非橡皮擦模式
self.__painter.setPen(QPen(self.__penColor,self.__thickness, cap = Qt.RoundCap)) #设置画笔颜色，粗细
else:
#橡皮擦模式下画笔为灰色，粗细为20
self.__painter.setPen(QPen(Qt.gray, 20, cap = Qt.RoundCap))
#画
self.__painter.drawPoints(self.__currentPos)
self.__painter.end()
self.__lastPos = self.__currentPos
self.update() #更新显示
def mouseMoveEvent(self, mouseEvent):
#鼠标移动时，更新当前位置，并在上一个位置和当前位置间画线
self.__currentPos = mouseEvent.pos()
self.__painter.begin(self.__board)#表示在Qpixmap上画
if self.EraserMode == False:
#非橡皮擦模式
self.__painter.setPen(QPen(self.__penColor,self.__thickness, cap = Qt.RoundCap)) #设置画笔颜色，粗细
else:
#橡皮擦模式下画笔为灰色，粗细为20
self.__painter.setPen(QPen(Qt.gray, 20, cap = Qt.RoundCap))
#画线
self.__painter.drawLine(self.__lastPos, self.__currentPos)
self.__painter.end()
self.__lastPos = self.__currentPos
self.update() #更新显示
def Set_paint_image(self, paintImg_PIL):#加载已经画好的trimap
#先加载trimap到self.__board中
paintImg_PIL.resize((self.disp_img_w, self.disp_img_h), Image.NEAREST)
paintImg_qimage = ImageQt.ImageQt(paintImg_PIL)
paintImg_qpixmap = QPixmap.fromImage(paintImg_qimage).scaled(self.disp_img_w, self.disp_img_h)
self.__painter.begin(self.__board)
self.__painter.drawPixmap(0,0,paintImg_qpixmap)
self.__painter.end()
self.update()
def mouseReleaseEvent(self, mouseEvent):
self.__IsEmpty = False #画板不再为空