欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  IT编程

Python高效率处理图像显示图像方案

程序员文章站 2022-03-12 18:34:17
def Work_thread(self): # ch:创建显示的窗口 | en:Create the window for display cv2.namedWindow(str(self.n_win_gui_id),0) cv2.resizeWindow(str(self.n_win_gui_id), 500, 500) stFrameInfo = MV_FRAME_OUT_INFO_EX() img_buff = N....
def Work_thread(self):
        # ch:创建显示的窗口 | en:Create the window for display
        cv2.namedWindow(str(self.n_win_gui_id),0)
        cv2.resizeWindow(str(self.n_win_gui_id), 500, 500)
        stFrameInfo = MV_FRAME_OUT_INFO_EX()  
        img_buff = None
        while True:
            ret = self.obj_cam.MV_CC_GetOneFrameTimeout(byref(self.buf_cache), self.n_payload_size, stFrameInfo, 1000)
            if ret == 0:
                #获取到图像的时间开始节点获取到图像的时间开始节点
                self.st_frame_info = stFrameInfo
                print ("get one frame: Width[%d], Height[%d], nFrameNum[%d]"  % (self.st_frame_info.nWidth, self.st_frame_info.nHeight, self.st_frame_info.nFrameNum))
                self.n_save_image_size = self.st_frame_info.nWidth * self.st_frame_info.nHeight * 3 + 2048
                if img_buff is None:
                    img_buff = (c_ubyte * self.n_save_image_size)()
                
                if True == self.b_save_jpg:
                    self.Save_jpg() #ch:保存Jpg图片 | en:Save Jpg
                if self.buf_save_image is None:
                    self.buf_save_image = (c_ubyte * self.n_save_image_size)()

                stParam = MV_SAVE_IMAGE_PARAM_EX()
                stParam.enImageType = MV_Image_Bmp;                                        # ch:需要保存的图像类型 | en:Image format to save
                stParam.enPixelType = self.st_frame_info.enPixelType                               # ch:相机对应的像素格式 | en:Camera pixel type
                stParam.nWidth      = self.st_frame_info.nWidth                                    # ch:相机对应的宽 | en:Width
                stParam.nHeight     = self.st_frame_info.nHeight                                   # ch:相机对应的高 | en:Height
                stParam.nDataLen    = self.st_frame_info.nFrameLen
                stParam.pData       = cast(self.buf_cache, POINTER(c_ubyte))
                stParam.pImageBuffer =  cast(byref(self.buf_save_image), POINTER(c_ubyte)) 
                stParam.nBufferSize = self.n_save_image_size                                 # ch:存储节点的大小 | en:Buffer node size
                stParam.nJpgQuality     = 80;                                                # ch:jpg编码,仅在保存Jpg图像时有效。保存BMP时SDK内忽略该参数
                if True == self.b_save_bmp:
                    self.Save_Bmp() #ch:保存Bmp图片 | en:Save Bmp
            else:
                continue

            #转换像素结构体赋值
            stConvertParam = MV_CC_PIXEL_CONVERT_PARAM()
            memset(byref(stConvertParam), 0, sizeof(stConvertParam))
            stConvertParam.nWidth = self.st_frame_info.nWidth
            stConvertParam.nHeight = self.st_frame_info.nHeight
            stConvertParam.pSrcData = self.buf_cache
            stConvertParam.nSrcDataLen = self.st_frame_info.nFrameLen
            stConvertParam.enSrcPixelType = self.st_frame_info.enPixelType 

            # Mono8直接显示
            if PixelType_Gvsp_Mono8 == self.st_frame_info.enPixelType:
                numArray = CameraOperation.Mono_numpy(self,self.buf_cache,self.st_frame_info.nWidth,self.st_frame_info.nHeight)

            # RGB直接显示
            elif PixelType_Gvsp_RGB8_Packed == self.st_frame_info.enPixelType:
                numArray = CameraOperation.Color_numpy(self,self.buf_cache,self.st_frame_info.nWidth,self.st_frame_info.nHeight)

            #如果是黑白且非Mono8则转为Mono8
            elif  True == self.Is_mono_data(self.st_frame_info.enPixelType):
                nConvertSize = self.st_frame_info.nWidth * self.st_frame_info.nHeight
                stConvertParam.enDstPixelType = PixelType_Gvsp_Mono8
                stConvertParam.pDstBuffer = (c_ubyte * nConvertSize)()
                stConvertParam.nDstBufferSize = nConvertSize
                ret = self.obj_cam.MV_CC_ConvertPixelType(stConvertParam)
                if ret != 0:
                    tkinter.messagebox.showerror('show error','convert pixel fail! ret = '+self.To_hex_str(ret))
                    continue
                cdll.msvcrt.memcpy(byref(img_buff), stConvertParam.pDstBuffer, nConvertSize)
                numArray = CameraOperation.Mono_numpy(self,img_buff,self.st_frame_info.nWidth,self.st_frame_info.nHeight)

            #如果是彩色且非RGB则转为RGB后显示
            elif  True == self.Is_color_data(self.st_frame_info.enPixelType):
                nConvertSize = self.st_frame_info.nWidth * self.st_frame_info.nHeight * 3
                stConvertParam.enDstPixelType = PixelType_Gvsp_RGB8_Packed
                stConvertParam.pDstBuffer = (c_ubyte * nConvertSize)()
                stConvertParam.nDstBufferSize = nConvertSize
                ret = self.obj_cam.MV_CC_ConvertPixelType(stConvertParam)
                if ret != 0:
                    tkinter.messagebox.showerror('show error','convert pixel fail! ret = '+self.To_hex_str(ret))
                    continue
                cdll.msvcrt.memcpy(byref(img_buff), stConvertParam.pDstBuffer, nConvertSize)
                numArray = CameraOperation.Color_numpy(self,img_buff,self.st_frame_info.nWidth,self.st_frame_info.nHeight)

            cv2.resizeWindow(str(self.n_win_gui_id), 500, 500) 
            cv2.imshow(str(self.n_win_gui_id),numArray)
            cv2.waitKey(1)

            if self.b_exit == True:
                cv2.destroyAllWindows()
                if img_buff is not None:
                    del img_buff
                if self.buf_cache is not None:
                    del buf_cache
                break

 

本文地址:https://blog.csdn.net/qq_31558353/article/details/107247617