Kivy与opencv.调整图像大小 [英] Kivy With opencv. Resizing Image size

问题描述

我想在kivy中插入一个opencv网络摄像头视频.不幸的是，当我这样做并最大化窗口时，图像无法适应屏幕尺寸.有什么办法吗?

I want to insert an opencv webcam video in kivy. Unfortunately, when I do this and maximize the window the image does not adjust to the screen size. Is there any way to do this ?

from kivy.app import App
from kivy.uix.image import Image
from kivy.clock import Clock
from kivy.graphics.texture import Texture
import cv2

from kivy.uix.boxlayout import BoxLayout
from kivy.uix.gridlayout import GridLayout
from kivy.uix.widget import Widget
from kivy.uix.button import Button
from kivy.lang import Builder
from kivy.core.window import Window
Window.size=(1000,1000)


class KivyCamera(Image):
    def __init__(self, capture, fps, **kwargs):
        super(KivyCamera, self).__init__(**kwargs)
        self.capture = capture
        Clock.schedule_interval(self.update, 1.0 / fps)

    def update(self, dt):
        ret, frame = self.capture.read()
        if ret:
            buf1 = cv2.flip(frame, 0)
            buf = buf1.tostring()
            image_texture = Texture.create(size=(frame.shape[1], frame.shape[0]), colorfmt='rgb')#(480,640)
            image_texture.blit_buffer(buf, colorfmt='bgr', bufferfmt='ubyte')
            # display image from the texture
            self.texture = image_texture


class CamApp(App):
    def build(self):
        self.camera= cv2.VideoCapture(2)
        self.my_camera = KivyCamera(capture=self.camera, fps=10,resolution=(1280,960))
        return self.my_camera

    def on_stop(self):
        self.camera.release()


if __name__ == '__main__':
    CamApp().run()

我希望当窗框尺寸增加时镜架尺寸也会增加.当我尝试更改Texture的大小时，它给了我错误.就像要么显示奇怪的图像，要么不打开任何窗口.如果有人可以帮忙，那将是很好.谢谢 ！

I am hoping that the size of the frame increases when winow size increases. When I try to change the size in Texture it gives me error. Like either shows weird images or does not open any window. It would be great if somebody could help . Thanks !

推荐答案

您可以执行以下操作: 将类类型更改为BoxLayout. 将图片窗口小部件添加到具有size_hint =(1,1)的Boxlayout中. 像这样在 init 中使用尺寸绑定:

you can do this: change the class type to BoxLayout. adding Image widget to Boxlayout with size_hint=(1,1). use size binding in init like this:

self.image = Image(size_hint=(1,1))
self.add_widget(self.image)
self.binding(size=self.Updatesize,
             pos=self.Updatesize)

并在您的类中定义一个函数，如下所示:

and define a function in your class like this:

def Updatesize(*args):
   self.image.size=self.size
   self.image.pos=self.pos

这篇关于Kivy与opencv.调整图像大小的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！