focuspoint | beautiful library which deals with the problem | Computer Vision library
kandi X-RAY | focuspoint Summary
kandi X-RAY | focuspoint Summary
In a nutshell, the focuspoint offers a solution to view images in all different ratios after the user has defined a focuspoint (hot spot) in the image while uploading it. The focuspoint is suitable for every kind of JavaScript application.
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Trending Discussions on focuspoint
QUESTION
I'm working on a swift camera app and trying to solve the following problem. My camera app, which allows taking a video, can change the camera focus and exposure when a user taps somewhere on the screen. Like the default iPhone camera app, I displayed the yellow square to show where the user tapped. I can see exactly where the user tapped unless triggering the timer function and updating the total video length on the screen. Here is the image of the camera app.
As you can see there is a yellow square and that was the point I tapped on the screen.
However, when the timer counts up (in this case, 19 sec to 20sec) and updates the text of total video length, the yellow square moves back to the center of the screen. Since I put the yellow square at the center of the screen on my storyboard, I guess when the timer counts up and updates the label text, it also refreshing the yellow square, UIView, so displaying at the center of the screen (probably?).
So if I'm correct, how can I display the yellow square at the user tapped location regardless of the timer function, which updates UIlabel for every second?
Here is the code.
...ANSWER
Answered 2021-Apr-20 at 04:33It isn't a threading issue. It is an auto layout issue.
Presumably you have positioned the yellow square view in your storyboard using constraints.
You are then modifying the yellow square's frame directly by modifying the center property; this has no effect on the constraints that are applied to the view. As soon as the next auto layout pass runs (triggered by the text changing, for example) the constraints are reapplied and the yellow square jumps back to where your constraints say it should be.
You have a couple of options;
Compute the destination point offset from the center of the view and then apply those offsets to the
constantproperty of your two centering constraintsAdd the yellow view programatically and position it by setting its frame directly. You can then adjust the frame by modifying
centeras you do now.
QUESTION
I've been making an iOS camera app and trying to solve this problem for two days (but cannot solve this).
What I'm working on now is change the focus and exposure automatically depending on the user's tapped location. Sometimes it works fine (maybe about 20% in total), but mostly it fails. Especially when I try to focus on a far object (like 5+metre) or when there are two objects and try to switch the focus of one object to another. The image below is an example.
The yellow square locates where the user tapped and even though I tapped the black cup in the first picture, the camera still focuses on the red cup.
...ANSWER
Answered 2021-Apr-09 at 09:58Thanks to @Artem I was able to solve the problem. All I needed to do was convert the absolute coordinate to the value used in focusPointOfInterest (min (0,0) to max (1,1)).
Thank you, Artem!!
QUESTION
I'm making a camera app using Swift. Currently, I'm working on displaying a yellow square when the user taps a screen to change the focus and exposure of the camera. I was able to make a change of camera focus and exposure by tapping somewhere on the screen. However, when I try to display the yellow square at the user tapped location, it always shows up top left corner of the iPhone. (I mean... for example if I press the center of the screen to change the focus, the camera app will focus to the center but the yellow square, which indicates where to focus, appears top left corner of the screen.)
This is the screen of the test device. As you can see, there is a yellow square at the top left corner even though I tapped the center of the screen.
Here is a part of my code.
...ANSWER
Answered 2021-Apr-08 at 07:16When you are calculating focusPoint, you are dividing the x and y coordinates by the screen width and height. This essentially turns them into percentages (which is why you are seeing those small decimal values).
If you want the actual point (which seems to be what you use later), don’t divide by the screen size.
QUESTION
I am just trying to read a directory and out put the file names to a csv. The directory read works fine. It is when I try to write to the csv that I am getting this error.
line 148, in _dict_to_list wrong_fields = rowdict.keys() - self.fieldnames AttributeError: 'str' object has no attribute 'keys'
...ANSWER
Answered 2020-Oct-08 at 13:55Your variable fields is not a dictionary. So csv.DictWriter will not work. How about?
QUESTION
This is the initial data set.
...ANSWER
Answered 2020-Oct-02 at 13:06It's not quite clear to me what you want. Are you looking for something like this?
QUESTION
This is my first question. I have tried to look at the source (link) Searched stackoverflow and read some general explanations. But i don't get any wiser as to how to set it up (or understand) it correctly.
I don't understand projection-matrices or much of the GL terms. I don't know what happens when you set camera (camera.setToOrtho()) when you should update the camera or when to set the batch's projection matrix. Up to now my only use of this was limited to the code used in the draw() method shown below.
I have a tile-based game with layers. i would like to use a FrameBuffer to draw the water-layer to a TextureRegion. So i can later try to manipulate it with shaders. I Think that would be the way to do this.
(I am not using any "Scene2d" or "Tiled" classes)
Example of what the layer looks like
How i draw my layers:
...ANSWER
Answered 2020-Jun-11 at 17:19Regarding your point 1: You don't need that line because SpriteBatch manages blending for itself and will overwrite whatever blend state you set before calling batch.begin().
Regarding your point 4: By putting them out of order like this, you are not drawing to the FBO at all. Probably there was something set up wrong with your FBO or the way you draw it, so it wasn't working, but drawing directly to the screen like normal makes it look like it's working.
Like in your example, this will work with the assumption that it is interrupting existing drawing done between batch.begin() and batch.end(). So it would get called in between your begin() and end() calls like this:
QUESTION
ANSWER
Answered 2019-Jun-14 at 14:47Finally I Got the solution!
It turned out that I should convert the position to the scene’s world coordinate space, using this method convertPosition(SCNVector3,to:)
Here the complete code :
QUESTION
Referencing these questions here: How to implement tap to focus on barcode scanner app using swift?
Set Camera Focus On Tap Point With Swift
https://stackoverflow.com/a/41796603/8272698
The links above are quite old and out of date. I have tried to use the answers provided above but to no avail... below is my attempt from them..
I need to tap my screen when reading barcodes to implement a focus on the object in the view.
Here is my code attempt
...ANSWER
Answered 2019-Jan-23 at 22:02You're on the right track. It's getting stuck at
QUESTION
I tried following the tutorials from google but things are just not working out. I am having error in my RecyclerViewAdapter.
Error is as follows RecyclerViewAdapter. (commented in 9th line)
...ANSWER
Answered 2017-Sep-28 at 21:29You should not add Views to
listItems.listItemscontains items, not views.NativeExpressAdViewHoldershould extendRecyclerViewHolder.holder.getPosition()is a position, not an adView. It can't be cast toNativeExpressAdView.If you still want to keep adViews in items list, you should change type of itemsList as it is described in example.
private final List mRecyclerViewItems;not
List
QUESTION
Right now in my camera app I let the user touch anywhere to set the focus and exposure, but how can I get the best of both worlds just like Apple's Camera app?
For instance, the user may want to touch to focus on something that is in the foreground, but if the scene changes enough, it should go back to continuousAutoFocus. Same if the user points the camera towards a light, it should change exposure to make it appear correctly, and then when the camera goes back to the scene it should fix the exposure once again so it isn't too dark. However, they still have the option to make it a little lighter or darker depending on what they touch through the camera's view.
Right now I set my defaults to the center of the screen when the view appears:
...ANSWER
Answered 2018-Apr-06 at 17:10Figured it out. First I call a method on myViewDidAppear that sets my default focus and exposure mode:
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