Eg: user is choosing 1000 * 1000 image I am sending to backend to detect the object , so I am getting coordinates of the object that present in the image .
Like this :(
{
x = 385;
y = 249;
},
{
x = 448;
y = 242;
},
{
x = 454;
y = 276;
},
{
x = 391;
y = 284;
}
);
I am setting the image view to the aspect fit so the actual size of the image will vary , so based on the aspect fit size I need to change the coordinates to fit aspect fit size image .
This is the code that I was tried.
var topLeftXOne = point[0]["x"] as! CGFloat
var topLeftYOne = point[0]["y"] as! CGFloat
var topRightXOne = point[1]["x"] as! CGFloat
var topRightYOne = point[1]["y"] as! CGFloat
var bottomtopRightXOne = point[2]["x"] as! CGFloat
var bottomRightYOne = point[2]["y"] as! CGFloat
var bottomLeftXOne = point[3]["x"] as! CGFloat
var bottomLeftYOne = point[3]["y"] as! CGFloat
let pointsView = ALPDView(frame: CGRect.zero)
let x: CGRect = AVMakeRect(aspectRatio: image.size, insideRect: pointsView.imageView.frame)
let scaleX = image.size.width / x.width
let scaleY = image.size.height / x.height
topLeftXOne = topLeftXOne / scaleX
topLeftYOne = topLeftYOne / scaleY
topRightXOne = topRightXOne / scaleX
topRightYOne = topRightYOne / scaleY
bottomtopRightXOne = bottomtopRightXOne / scaleX
bottomRightYOne = bottomRightYOne / scaleY
bottomLeftXOne = bottomLeftXOne / scaleX
bottomLeftYOne = bottomLeftYOne / scaleY
But I am not getting the proper result.
This the e.g. image , I want to change the coordinates to fit the aspect image size.
Finally I have achieved that by using ratio method . I took the aspect ratio of the image size and calculated according to ratio math.
let x: CGRect = AVMakeRect(aspectRatio: image.size, insideRect: pointsView.imageView.frame)
let scaleX = image.size.width / x.width
let scaleY = image.size.height / x.height
var topLeftXOne = point[0]["x"] as! CGFloat
var topLeftYOne = point[0]["y"] as! CGFloat
var topRightXOne = point[1]["x"] as! CGFloat
var topRightYOne = point[1]["y"] as! CGFloat
var bottomtopRightXOne = point[2]["x"] as! CGFloat
var bottomRightYOne = point[2]["y"] as! CGFloat
var bottomLeftXOne = point[3]["x"] as! CGFloat
var bottomLeftYOne = point[3]["y"] as! CGFloat
let pointsView = ALPDView(frame: CGRect.init(x: 0, y: 0, width:self.view.frame.size.width , height: self.view.frame.size.height))
let additionValueForX = x.origin.x + 20
let additionValueForY = x.origin.y - 40
topLeftXOne = topLeftXOne / scaleX + additionValueForX
topLeftYOne = topLeftYOne / scaleY + additionValueForY
topRightXOne = topRightXOne / scaleX + additionValueForX
topRightYOne = topRightYOne / scaleY + additionValueForY
bottomtopRightXOne = bottomtopRightXOne / scaleX + additionValueForX
bottomRightYOne = bottomRightYOne / scaleY + additionValueForY
bottomLeftXOne = bottomLeftXOne / scaleX + additionValueForX
bottomLeftYOne = bottomLeftYOne / scaleY + additionValueForY