Question

我正在运行以下代码，并试图修改路径，但是仍然无法解决问题。在这里，异常部分正在执行，而try块未在执行。

代码：

import cv2
import numpy as np 
image = cv2.imread("C:\\test_image.jpg")

try:
    cv2.imshow('result', image)
    cv2.waitKey(0)

except:
    print("Here")

Answer 1

我猜路径不正确。尝试将反斜杠加倍，例如C：\ test_image.jpg

Answer 2

您的路径不正确

struct GradientTest
{
    Gradient gradient;

    // Rectangles we check to move gradients' colors around
    Rect* keyRects = nullptr;
    bool mouseIsDownOverKey = false;
    int selectedKeyIndex = 0;

    void HandleInput()
    {
        int numKey = gradient.colorKeys.size();

        if (Input::ButtonClicked(Button_Left)) {
            for (int i = 0; i < numKey; i++) {
                if (keyRects[i].CheckPoint(Input::getMousePosition())) {
                    mouseIsDownOverKey = true;
                    selectedKeyIndex = i;

                    break;
                }
            }

            if (!mouseIsDownOverKey) {
                float keyTime = InverseLerp(0.0f, 512.0f, Input::getMouseX());
                Color color(rand() % 255, rand() % 255, rand() % 255, 255);
                selectedKeyIndex = gradient.AddKey(color, keyTime);
                mouseIsDownOverKey = true;
            }
        }

        if (mouseIsDownOverKey) {
            float keyTime = InverseLerp(0.0f, 512.0f, Input::getMouseX());
            gradient.UpdateKeyTime(selectedKeyIndex, keyTime);
        }

        if (!Input::ButtonDown(Button_Left)) {
            mouseIsDownOverKey = false;
        }
    }

    void Update()
    {
        int numKey = gradient.colorKeys.size();
        keyRects = new Rect[numKey];

        float rectW = 10.0f;
        float rectH = 20.0f;

        float gradientTextureW = 512.0f;
        float offset = 5.0f;

        // actual texture h is 1, but I scale it up a bit
        float gradientTextureH = 100.0f;

        for (int i = 0; i < numKey; ++i) {
            auto key = gradient.getKey(i);
            keyRects[i] = Rect(512.0f * key.time - offset, gradientTextureH + rectH, rectW, rectH);
        }

        HandleInput();

        delete[] keyRects;
    }
};

消息：错误：（-215：断言失败）函数'cv :: imshow'中的size.width> 0 && size.height> 0

2 个答案: