Methods to acquire, analyze and understand images using mathematical approaches.
Questions tagged [vision]
664 questions
9
votes
1 answer
How to get the current frame (as a Bitmap) for android facedetector in a Tracker event?
I have the standard com.google.android.gms.vision.Tracker example successfully running on my android device and now i need to postprocess the image to find the iris of the current face which has been notified in the event methods of the Tracker.
So,…
John Doe
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9
votes
1 answer
Using OpenCV to detect parking spots
I am trying to use opencv to automatically find and locate all parking spots in an empty parking lot.
Currently, I have a code that thresholds the image, applies canny edge detection, and then uses probabilistic hough lines to find the lines that…
tincan
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8
votes
1 answer
Android Mobile Vision API library not found
We have developed a library that among other things, uses Android Mobile Vision API in order to detect user's face. The following problem occurs only on Lenovo Tab E7 and Billow X703.
private void createCameraSource() {
Context context…
npal
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8
votes
7 answers
Computer vision datasets
I am testing computer vision algorithms for image categorization. I would like to find a dataset with a few categories of objects e.g. cats and dogs. This dataset should have all the variability within each class be due to the class's intrinsic…
innocuousQualia
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8
votes
1 answer
No acceptable module found. Local version is 0 and remote version is 0 in FaceDetector.Builder
The application throws this error
Error Loading module com.google.android.gms.dynamite.DynamiteModule$LoadingException: No acceptable module found. Local version is 0 and remote version is 0
when trying to configure the Google-vision FaceDetector,…
Orelvis15
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8
votes
1 answer
Person Eye Gaze Detection: Identify where the user is looking at on a board
I am working on a project where there is board and camera on top of it. The objective is to identify students who are looking at the board and also identify the location of their sight (on the board).
Currently, I am planning to approach the…
pavan subhash
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8
votes
2 answers
Image not segmenting properly using DBSCAN
I am trying to use DBSCAN from scikitlearn to segment an image based on color. The results I'm getting are . As you can see there are 3 clusters. My goal is to separate the buoys in the picture into different clusters. But obviously they are…
Ryan Fatt
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8
votes
1 answer
Detect table with OpenCV
I often work with scanned papers. The papers contain tables (similar to Excel tables) which I need to type into the computer manually. To make the task worse the tables can be of different number of columns. Manually entering them into Excel is…
Datageek
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8
votes
1 answer
Opencv cv2.absdiff(img1, img2).sum() without temporary img
Is it possible to calculate cv2.absdiff(img1, img2).sum() without temporary img ?
I have a video stream and I need some kind of image stabilization on the begining of my processing.
The absdiff gives fast and error dependent result on check…
jshepherd
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8
votes
1 answer
Phash vs. SIFT in identifying similar image
I have questions about both sift and phash
First of all, I'm using SIFT to identify similar image in real-time service.
Like pictures by phone-camera, small amount of rotation and blurred effect could be.
And I found Phash. So, I test phash on its…
jeyraof
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7
votes
0 answers
Reshape Face Coordinate in Swift
I want to reshape the face coordinate like showing in the video: https://www.dropbox.com/s/vsttylwgt25szha/IMG_6590.TRIM.MOV?dl=0 (Sorry, unfortunetly the video is about 11 MB in size).
I've just capture the face coordinate using iOS Vision API:
//…
SandeepM
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6
votes
3 answers
Shape/Pattern Matching Approach in Computer Vision
I am currently facing a, in my opinion, rather common problem which should be quite easy to solve but so far all my approached have failed so I am turning to you for help.
I think the problem is explained best with some illustrations. I have some…
Nicolas
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6
votes
2 answers
Pytorch Unfold and Fold: How do I put this image tensor back together again?
I am trying to filter a single channel 2D image of size 256x256 using unfold to create 16x16 blocks with an overlap of 8. This is shown below:
# I = [256, 256] image
kernel_size = 16
stride = bx/2
patches = I.unfold(1, kernel_size,…
Bled Clement
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6
votes
1 answer
6
votes
0 answers
Google API Vision - java.lang.NoSuchMethodError
I'm trying to run the Google Api Vision sample code but I'm getting this error:
Exception in thread "main" java.lang.NoSuchMethodError: com.google.common.util.concurrent.MoreExecutors.directExecutor()Ljava/util/concurrent/Executor;
These are the…
Thiago de Melo Fontana
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