Question

def gaussianblur(img,sigma):
      if(sigma<0):
        print("SIGMA SHOULD BE POSITIVE")
        return;

高斯函数

      deno=(((math.sqrt(2*3.142*sigma*sigma))))
      k=[0,0,0,0,0]
      sum=0




      for x in range(-2,3):
       numo=(math.exp(-((x*x)/(2*(sigma*sigma)))))
       k[x+2]=(numo/deno)
       sum=sum+k[x+2]




      for x in range(0,5):
        k[x]=(k[x]/sum)

用g（x）=（1 / squareroot（2 * sigma * sigma * 3.142））计算1维核心* e ^（ - （x * x）/（2 * sigma * sigma））

      for i in range(0,img.shape[0]):
       for j in range(2,img.shape[1]-2):
            img[i,j]=abs((img[i,j-2]*k[0])+(img[i,j-1]*k[1])+(img[i,j]*k[2])+(img[i,j+1]*k[3])+(img[i,j+2]*k[4]))



      return img;  `#end of gaussian blur function`

逐行应用卷积

dog=img = cv2.imread('art.jpg',cv2.IMREAD_GRAYSCALE)

主要功能开始

阅读图片

temp=img=gaussianblur(img,1)

#display image
cv2.imshow('blur1',img)

应用第一次模糊

temp=gaussianblur(temp,1)

cv2.imshow('blur2',temp)

应用第二次模糊

for i in range(0,img.shape[0]):
    for j in range(0,img.shape[1]):
       dog[i,j]=abs((img[i,j])-(temp[i,j]))

cv2.imshow('DoG',dog)

高斯的差异

gfortran

输出

blur1

blur2

DoG

Answer 1

您在此处覆盖您的输入：

CATransform3DRotate(t:angle:x:y:z:)

尝试将结果写入新图像。

我不知道OpenCV python界面是如何工作的，var t = CATransform3DMakeRotation(CGFloat(M_PI), 0, 1, 0) t.m34 = 0.001 // set a 3D perspective to simulate real flipping let anim = CABasicAnimation(keyPath: "transform") anim.byValue = NSValue(caTransform3D: t) anim.duration = 3 anim.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseIn) anim.fillMode = kCAFillModeForwards anim.isRemovedOnCompletion = true let cardContainer = UIView(frame: CGRect(x: 100, y: 100, width: 200, height: 100)) cardContainer.backgroundColor = UIColor.clear // layer1: front side of the card let layer1 = CALayer() layer1.frame = CGRect(x: 0, y: 0, width: 200, height: 100) layer1.backgroundColor = UIColor.red.cgColor layer1.isDoubleSided = false // layer2: back side of the card let layer2 = CALayer() layer2.frame = CGRect(x: 0, y: 0, width: 200, height: 100) layer2.backgroundColor = UIColor.blue.cgColor layer2.isDoubleSided = false layer2.transform = CATransform3DMakeRotation(CGFloat(M_PI), 0, 1, 0) cardContainer.layer.addSublayer(layer1) cardContainer.layer.addSublayer(layer2) layer1.add(anim, forKey: "anim1") layer2.add(anim, forKey: "anim2")会导致for i in range(0,img.shape[0]): for j in range(2,img.shape[1]-2): img[i,j]=abs((img[i,j-2]*k[0])+(img[i,j-1]*k[1])+(img[i,j]*k[2])+(img[i,j+1]*k[3])+(img[i,j+2]*k[4]))与temp=img共享数据（例如，当您更改数据时，您也会更改另一个）？确保您有两个不同的数据块！

我正在获得黑色拉普拉斯的高斯图像

1 个答案: