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Questions tagged [image-recognition]

Classification of a detected object into different known categories.

The classical problem in computer vision, image processing, and machine vision is that of determining whether or not the image data contains some specific object, feature, or activity. There are different varieties of this , such as object detection, Identification (like face recognition ), Content-based image retrieval ( like similar images option in google image search) etc.

1351 questions
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Algorithm to compare two images

Given two different image files (in whatever format I choose), I need to write a program to predict the chance if one being the illegal copy of another. The author of the copy may do stuff like rotating, making negative, or adding trivial details…
Lam Luu
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26 answers

error: (-215) !empty() in function detectMultiScale

I'm trying to learn cv2 in python 2.7, but when I run my code, in the specific part of it: face_cascade = cv2.CascadeClassifier('haarcascade_frontalface_default.xml') eye_cascade = cv2.CascadeClassifier('haarcascade_eye.xml') img =…
arthurckl
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Are there any OK image recognition libraries for .NET?

I want to be able to compare an image taken from a webcam to an image stored on my computer. The library doesn't need to be one hundred percent accurate as it won't be used in anything mission critical (e.g. police investigation), I just want…
RodgerB
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Logo recognition in images

Does anyone know of recent academic work which has been done on logo recognition in images? Please answer only if you are familiar with this specific subject (I can search Google for "logo recognition" myself, thank you very much). Anyone who is…
elijah
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Image similarity comparison

I originally asked this question on cstheory.stackexchange.com but was suggested to move it to stats.stackexchange.com. Is there an existing algorithm that returns to me a similarity metric between two bitmap images? By "similar", I mean a human…
JoJo
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Detection of coins (and fit ellipses) on an image

I am currently working on a project where I am trying to detect a few coins lying on a flat surface (i.e. a desk). The coins do not overlap and are not hidden by other objects. But there might be other objects visible and the lighting conditions may…
florianbaethge
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Algorithm to detect presence of text on image

With my new assignment I am looking for a method to detect the presence of text on image. The image is a map - can be for example google map. The task is to detect where the street/city label is placed. I know that opencv library has algorithm that…
John
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Darknet YOLO image size

I am trying to train custom object classifier in Darknet YOLO v2 https://pjreddie.com/darknet/yolo/ I gathered a dataset for images most of them are 6000 x 4000 px and some lower resolutions as well. Do I need to resize the images before training to…
Farahats9
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Image recognition library/API for iPhone code

I need to make an iOS app with these features: Use the camera capture a image. Recognize that image: Does it match with a sample image or not? Is there any online API to do that (from Google, Yahoo, ...)? For example, can I upload an image and I…
Kevin Duong
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Alternatives to face.com API

Sadly, the face.com API is being shut down due acquisition by Facebook. Are there any decent alternatives out there? I'm looking to check for a given image if there is a face in it + demographics content about it.
Noam
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Finding a picture in a picture with java?

what i want to to is analyse input from screen in form of pictures. I want to be able to identify a part of an image in a bigger image and get its coordinates within the bigger picture. Example: would have to be located in And the result would be…
tarrasch
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Finding repeating patterns/images in images

I've been looking around for some papers (or info) on this topic. To avoid a misunderstanding: I'm not talking about finding a supplied pattern in multiple locations. Repeating patterns can also be understood to mean repeating images. The…
EthernetCable
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specific Object / Image detection from app locally, without internet

My requirement is to scan a fixed object. After recognizing that, I want to highlight the object and to display corresponding pre-feeded parameters accordingly, like height, width, circumference, etc. This all, I want to do, without internet, using…
Narendra Singh
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CNN Image Recognition with Regression Output on Tensorflow

I want to predict the estimated wait time based on images using a CNN. So I would imagine that this would use a CNN to output a regression type output using a loss function of RMSE which is what I am using right now, but it is not working…
Ic3MaN911
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Recognizing distortions in a regular grid

To give you some background as to what I'm doing: I'm trying to quantitatively record variations in flow of a compressible fluid via image analysis. One way to do this is to exploit the fact that the index of refraction of the fluid is directly…
pdxmere
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