Tagged Questions
0
votes
1answer
44 views
Are there any established C# image interpretation algorithms, or patterns? [on hold]
Thanks for looking.
I have a database of a few hundred thousand images which I would like to algorithmically classify using c# if possible.
I realize that this might be a tall order, but I am really ...
-1
votes
0answers
12 views
object recognition using Freak
I am doing research on object recognition system and I am interested to develop the system using FAST detector and FREAK descriptor.
Following is the block diagram i am referring to:
Block diagram
...
0
votes
0answers
27 views
knnsearch taking lot of time for large number of features
I am using FLANN based knnsearch. My feature-set contains 4 images of size 500*500. I want nearest neighbors to all the points in all 4 images(the query set is same as feature set) but its taking a ...
1
vote
3answers
138 views
Character segmentation of captcha image
I'm trying to crack a CAPTCHA image but I can't find a way to segment the characters.
I have this image:
I applied some filters and thresholding which resulted in this image:
Now I need to segment ...
6
votes
2answers
191 views
Training Algorithm to train this data
I am working in MATLAB
PLots
NOTE : Here, the data plotted is the track of x - position of the pixel at position (i,j) of the FIRST frame throughout all the frames. It means that the pixel at ...
0
votes
1answer
37 views
Class aware visual dictionary creation
I am trying to use visual dictionary for visual categorization in images.I know how to create dictionary without knowing the class information.For instance the opencv code is as follows.
Mat ...
2
votes
1answer
58 views
Segmentation - Separating Touching Objects
I have built a system to segment a binary image containing handwritten symbols and classify them (specifically for music). I'm aware there are commercial applications which do this but this is me ...
0
votes
0answers
51 views
EdgeLet normalization for human detection
I am implementing people detection scheme based on edgelet concept following well-known paper [1] for my research purposes.
Edgelet equation from [1]:
S(w) = (1/k) * sum_{i=1,...,k}( M_{i}(…) * ...
0
votes
0answers
29 views
Sliding Window Object detection
I am trying to implement a sliding window technique to identify my hypothesis. I am using a 64 x 128 window however I also want to find objects smaller than my window or objects larger than my window. ...
1
vote
1answer
68 views
Eyeglasses Detection in facial image
I am working on detection of eyeglasses in frontal image. My goal is to just detect presence of eyeglasses without localizing exact position.
Work given in the paper at ...
1
vote
0answers
50 views
Reading CIFAR10 data with java
I am working on a Machine Learning project with the CIFAR10 dataset and I am looking for the fastest way to process the data using Java. It consists of 60,000 32x32 color images. The images are in png ...
3
votes
2answers
68 views
Recognizing a topological graph in a noisy image
I am not at all experienced with machine learning or image processing, so I'm hoping someone can give some pointers of first thoughts on this problem:
The image linked here is an example of a ...
1
vote
0answers
50 views
how to train SVM using landmarks from CI2CV sdk to classify expressions?
I have an image such as this
after feeding the image to the CI2CV face-fit i get this
Along with a file containing info that i can't make sense of for the 66 landmarks detected in the following ...
1
vote
1answer
74 views
where to get training data for SVM for facial expression recognition? [closed]
I am working on a project where I have to detect a face and extract an expression out of it to do some processing on the expression afterwards, I have used CI2CV face sdk to do the detection and ...
-3
votes
1answer
204 views
Face recognition using SVM
I have tried implementing the SVM for face-recognition and below is the code I used for training and testing. The problem is that I am not getting accurate results and I am always getting the predict ...
1
vote
3answers
118 views
What is the method to detect whether a given picture is human face or not?
Is there any simple algorithm to judge whether a given image is face or something else (without training hopefully)?
My thought is to construct the eigenvectors of each image, then apply some ...
0
votes
0answers
103 views
Assertion failed (queryDescriptors.type() == trainDescCollection[0].type()) in knnMatchImpl,
when using BOWImgDescriptorExtractor with DescriptorExtractor as SIFT and DescriptorMatcher as ButeForce i am getting error as
OpenCV Error: Assertion failed (queryDescriptors.type() == ...
0
votes
2answers
63 views
Support vector machines for mutliple object categorization
I am trying to use linear SVMs for multi-class object category recognition. So far what I have understood is that there are mainly two approaches used- one-vs-all(OVA) and one-vs-one(OVO).
But I am ...
0
votes
0answers
135 views
random forest vs support vector machine on image processing
I recently worked on the image recognition. One data point consists of one feature vector x and its label y. Image features I used are like this: gist, color histgram, HOG. I vectorize these features ...
0
votes
0answers
90 views
Matlab: Contruct Random Forest Model for Training and Label Vectors
I am trying to construct a Random Forest Model for the 12 extracted feature vectors and 1 Label Vector in my problem. I am having alot of problems in the following line
B = ...
-2
votes
2answers
35 views
which classifier would be better for scanned images?
I am presently working with 500 of scanned images and have done feature extraction on them and I'm using the obtained offset values for classifying the images. I tried using k nearest neighbor ...
0
votes
0answers
117 views
Head Pose estimation in real-time video
I need to do head pose estimation in live camera video. I have tried with few options like POSIT and shervin Emami's code.
The problem is that I couldnt find any code that uses live video as input. ...
-1
votes
1answer
229 views
Find density of the Edges in a image
I have used Canny edge detector to detect the edges and below is the output. I need to detect the density of edges in the image and select the region where ever the density is high. How to do that in ...
1
vote
2answers
178 views
Crop the region of interest with few points available
I have used convex hull and convexity defects and found the points in the hand as shown below.
With the above points information available, how can I crop the region marked in red (Knuckle) as ...
-2
votes
1answer
55 views
Image training in python [closed]
For an assignment in class i have to recognize a soccer ball and kick it with a NAO robot. Im still stuck in the first phase.
I already have an image of three balls next to each other. A basketball, ...
0
votes
1answer
75 views
Best supervised learning algorithm for small data
I am wonder which supervised learning algorithm is best for generalising small data. I have a feature vector of size (64 x 122) where 64 is one dimension feature vector for the image path which 122 is ...
4
votes
1answer
218 views
Face-recognition using Opencv
I need to do a face recognition system using opencv LBP and here is the link where the facerec code.
In this code the CSV file has to be generated for Multiple users and the code will recognize if ...
1
vote
2answers
390 views
Bag of words not correctly labeling responses
I am trying to implement Bag of Words in opencv and has come with the implementation below. I am using Caltech 101 database. However, since its my first time and not being familiar, I have planned to ...
0
votes
0answers
195 views
Crop an image with ConvexHull and ConvexDefect
I used the below code to detect the hand and drawn a convex-hull in it.
The below is my code flow:
1) Corner detection ( Threshold ).
2) Erode + Dilation.
3) Contour detection.
4) Convex hull in ...
2
votes
2answers
912 views
Euclidean distance two pixels, each belonging to different images
I'm trying to implement Naive Bayes Nearest Neighbor (NBNN) for image classification. In the algorithm it asks for the Euclidean distance between two pixels belonging to different images.
I have 1) a ...
0
votes
3answers
96 views
Object Detection in an Image
I want to detect some elements in an Image.
For this goal, i get the image and the specified element (like a nose) and from Pixel(0,0) start to search for my element.
But the software performance is ...
1
vote
1answer
105 views
Segmentation in Bag of Word Model
Can someone highlight to me whether the bag of word model performs segmentation process? As far as I know, the BoW treats image features as a set of words just like in documents and represents the ...
1
vote
3answers
396 views
Blink detection with ASM co-ordinates [closed]
I have used STASM and found the 76 facial co-ordinates like eyes, nose mouth etc., My intention is to find the blink detection.
Can some one provide me ideas on how to proceed with these co-ordinates ...
-1
votes
1answer
239 views
test data generation for nural network handwriting recognition
Can someone share some octave/matlab code/algo to preprocess a photo taken from mobile camera
of a handwritten digit. After preprocessing data should have similar characteristic like MNIST data set ...
-1
votes
1answer
318 views
How to add text or merge image to JPEG file [closed]
I have a web application, the user will upload the JPEG files with layout as my sample, i need to dynamically add text to the "Title" area, and merge other JPEG file to the "Bottom" area.
Is it ...
2
votes
5answers
83 views
Detecting “city” background versus “desert” background in images using image processing/computer vision
I'm searching for algorithms/methods that are used to classify or differentiate between two outdoor environments. Given an image with vehicles, I need to be able to detect whether the vehicles are in ...
0
votes
3answers
402 views
How to use SIFT/SURF as features for a machine learning algorithm?
Im working on an automatic image annotation problem in which im trying to associate tags with images. For that im trying for SIFT features for learning. But the problem is all the SIFT features are a ...
3
votes
3answers
286 views
Finding elongated clusters using MATLAB
Let me explain what I'm trying to do.
I have plot of an Image's points/pixels in the RGB space.
What I am trying to do is find elongated clusters in this space. I'm fairly new to clustering techniques ...
0
votes
1answer
69 views
What are some of the parameters that should be kept in mind while working on handwriting matching project?
I am currently working on a project on Handwriting Matching algorithm where I am given some test data (images with text handwritten in English Language ) . I have to determine by matching this data ...
1
vote
1answer
332 views
Making feature vector from Gabor filters for classification
My aim is to classify types of cars (Sedans,SUV,Hatchbacks) and earlier I was using corner features for classification but it didn't work out very well so now I am trying Gabor features.
code from ...
1
vote
1answer
2k views
Finger detection in human hand
What i am trying to do:
I am trying to extract the fingers.
I want my code to perform something similar like this.
However, aim is to extract the knuckle.
Environment:
The person sitting in a ...
1
vote
0answers
67 views
Essential checks for Face verification Input
I am working on "Face Verification" algorithm with Mobile phone images.
I am planning to capture the query/test images only when they meet some standard checks as below.
2d Frontal - How to ensure ...
-1
votes
1answer
70 views
What classifier to use while performing unsupervised learning
I am new to Machine learning and I have this basic question. As I am weak in Math part of the algorithm I find it difficult to understand this.
When you are given a task to design a classifier(keep ...
5
votes
1answer
199 views
How to classify images using Apache Mahout?
How to perform image classification from mahout? How to convert the image to a form which is accepted by mahout classification algorithms? Is the any starter code to start with? Please share me some ...
1
vote
2answers
98 views
What would be a proper feature extraction method to discriminate orientation of 3d shaded cylinders?
Generally, I'm interested to in a neural network implementation to resolve a shape from shading problem. So far, to start with, I have gotten a simple shape from shading implementation.
Particularly ...
0
votes
1answer
80 views
relation between eigen values and principal component
what is the relation between principal components and eigen values (in PCA) ?
suppose i have calculated PCA for two regions in an image separately, from the eigen values of these two regions what we ...
2
votes
1answer
320 views
Detect basket ball Hoops and ball tracking
Detect the hoop(basket).To see the samples of "hoop".
Count the no of successful attempts(shoot) and the failure attempts.
I am using opencv.
Input:
Camera position will be static.
The Portrait ...
0
votes
2answers
673 views
Every time getting positive result while predicting from svm
I train svm using surf and bow , and now wher i predict the image it always return me 1 , even when i go for negative image it return me 1 as output
Here is Parameters for svm :
CvSVMParams Params;
...
1
vote
1answer
102 views
Which is better approach to train images
Can we put the training data into separate directories for each class, and loop through the images in each directory, and set the labels based on the directory like if i put the positive images in one ...
5
votes
1answer
146 views
How do I detect if a photo is a poster (not realistic)?
I have a number of .jpeg from the websites of musicians. These images are comprised of posters for upcoming shows and band photos (photos of the band in real life).
Here is an example poster:
I am ...
