In general, image processing is any form of signal processing for which the input is an image, such as a photograph or video frame.

learn more… | top users | synonyms

0
votes
0answers
13 views

Bicubic Interpolation

I'm trying to do bicubic interpolation on an 8*8 matrix(image) shown below. ...
0
votes
0answers
11 views

Discrete version of pillbox function

This is an image processing question. In 2-D Euclidean space a pillbox function, $f(x)$ is given by: $$f(x,y) = 1\text{ if } x^2 + y^2 < R, 0 \text{ otherwise } $$ $R$ is come constant. If I ...
0
votes
0answers
6 views

Bhattacharyya distance for image segmentation explanation

I have a question need some your suggestion. I spent 2 months to resolve that problem but the result is not so good. Hence, I would like ask you some thing about my implementation. My goal is that I ...
0
votes
0answers
13 views

Gabor filter bank spatial frequency parameters

I've been trying to learn about using Gabor filters to extract features from an image. There are some research papers that list their spatial frequency parameter in the form of x:y cycle per pixels in ...
0
votes
0answers
9 views

Using morphological operations for color images processing

Have you ever seen any articles about using morphological-like technique for denoising color images?
0
votes
1answer
14 views

any in built function to read a part of an image in malab? [on hold]

i am dealing with images with size 6000x9000 (16 bit). if i want to perform any mathematical operations on whole image it takes lot of time,at the same time it consumes a lot of working memory.i want ...
0
votes
0answers
22 views

Avoid saturated pixels in cross-correlation computation

I am doing template maching using Normalized Cross-Correlation for measuring similarity between template and image. However, some images from my dataset contain saturated pixels (overshoot) which ...
0
votes
0answers
25 views

Image Processing - Identifing/locating Random Solid Blocks of Colour

I am not overly familiar with image processing. I know a little about it from University, but I have not really done any for a while and I have found myself with a problem that requires it. What I ...
0
votes
0answers
13 views

Texture segmentation [closed]

I would like to ask you something about texture segmentation. Please give me some common method to segment texture image and what is basic idea of texure segmentation?
0
votes
0answers
13 views

Detecting inset images/videos from a video

I want to detect multiple rectangles in a video, each of which features a different content, but running simultaneously. This is typically seen during debates on news channels. For example, in the ...
3
votes
2answers
38 views

Algorithms for deformable image registration

I need to perform a deformable image registration (DIR) for delineation of the different brain parts on the brain MRI 3D image. I faced with a problem that there are a lot of different approaches for ...
1
vote
2answers
68 views

how can i get to know the frequency of a speech signal?

What is the actual meaning of frequency? what if the signal is aperiodic?? In general, we say that frequency means the repeatition of an event in unit time. But what about a speech signal? how can we ...
0
votes
0answers
21 views

Is pixel with resolution 100mX100m equal to four 50mX50m while covering same area?

I take an image with spatial resolution 100mX100m,I take the same image with spatial resolution 50mX50m then each pixel value in first image equal to some of four images when covering same area with ...
0
votes
0answers
15 views

Stegnography and cryptography

I am last year student working on the project: Separable reversible data hiding technique In encrypted image. What are the algorithms that we can apply on jpeg/png image for compression which ...
2
votes
1answer
74 views

O(1) peak segmentation algorithm in matlab?

I have an intensity image, similar to the image below. I would like to very quickly, segment this image, into separate peaks. Where each peak is labelled, and segmented. A notional segmentation of ...
-1
votes
0answers
88 views

Extraction of veins from sclera image

I want to extract sclera blood vein feature: from the sclera image for human identification. Which process should I follow? I already used the Gabor filter with Gabor features and Gabor filter ...
1
vote
0answers
35 views

Gonzalez question solution

If I have the histogram of an input image as Gaussian probability density function of the form: $$P_r(r)=\dfrac{1}{\sqrt{2\pi}\sigma}e^{-\dfrac{(r-\mu)^2}{2\sigma^2}} $$ where: $\mu$ and $\sigma$ ...
-3
votes
1answer
33 views

What is difference between Taylor series and Legendre polynomial?

As i know, taylor series is used for analysis f(x). So if i have many orders, i can approximate f(x). In this point of view, what is difference Legendre Polynomials?
2
votes
2answers
91 views

Calculation of sampling rate and its effect on an Image?

I know that for a given signal, the sampling frequency $F_s$ must be twice or more than maximum frequency of the signal $F_m$. It is easy to understand the concept for a 1D signal. But I don't know ...
-1
votes
1answer
57 views

Does anyone know how and when and where used Legendre polynomial?

I'd like approach to Legendre polynomial. But i don't make concept with Legendre polynomial. So if you know where and when does L.P used and how L.P used, would you please let me know about this? To ...
0
votes
0answers
15 views

Excluding the scatter points from a feature

I have a set of data points which are supposed to settle on a locus and follow a pattern, but there are some scatter points in the main locus which their existence in the data can increase the ...
1
vote
1answer
47 views

Histogram Intersection with two different bin sizes?

I have two images: A and B. Image A is a screenshot of image B, the original image. While there is noise in image A, the original features are still distinguishable. Histogram intersection tells us ...
0
votes
1answer
37 views

Image Segmentation applications

I wanna experiment k-means clustering method on different kind of images, so I am trying to find different kind of images used in image segmentation such as MRI images.I want to gather some more ...
0
votes
2answers
50 views

Pose estimation of colored checkerboard cubes

I want to find the orientation of 2x2 checkerboard cubes, like these: That is to say, I want to recover their positions and rotations within the image relative to the camera. In my particular ...
0
votes
1answer
20 views

float image to integer type image

I have a multispectral satellite image and I would like to "transform" each of the image bands into one with integer values. For example to stretch? the image between 0 and 255. Not sure how to ...
0
votes
1answer
51 views

map two RGB images in Matlab

I wonder is there any algorithm or method that I can map two RGB images together in Matlab. I mean assume I have following images Is there any way I find what number I should multiply each ...
0
votes
0answers
42 views

Understanding a mathematical statement in image processing

I am reading a document on Image processing and couldn't analyze a statement in it. For any $k \in \Psi_s$, the family of values $\{u[\varphi(p+l)+k-l]:l \in \Psi_s \}$ is representative of the ...
1
vote
0answers
25 views

Interpolation methods for radar and acoustic imaging and potential pitfalls

A) What are the most common methods used to remap data for current generation imaging radars and acoustic sensors? B) What are some of the pitfalls in these methods? For example, in the past, at ...
-1
votes
0answers
70 views

Get the number of objects from the edges (opencv 4 android)

I would like to get the count of objects in an image based on the number of edges drawn using the mat. Steps followed include: Capture image convert to grayscale Blur the image like ...
0
votes
0answers
22 views

Find maxima in digital image. Aplications?

I see in a lot of software for digital image analysis (such as ImageJ or Fiji) the option to spot the local maxima of an image. I have been searching through the web for aplications of this but I cant ...
0
votes
1answer
70 views

Separate sub-figures!

Any idea on separating multi-panel figures? There are 2 different sub-figures connected each other. Thanks!
0
votes
2answers
42 views

2D-otsu algorithm in Digital image processing

I'm working on image project using Matlab & I heard about 2D-otsu algorithm as effective segmentation with low SNR and low contrast images, but I can't find enough information about it or how to ...
1
vote
1answer
123 views

How to detect whether the object has triangular shape?

The task is to detect arrow from medical images. After segmenting, arrow-like objects can be connected with other connected components (noise). In this context, detecting a part of the object that ...
1
vote
0answers
46 views

Ways to find three curves from palm image

I am asked to extract three curves from palm images. original image expected result. The curves has lower intensity than ...
0
votes
2answers
69 views

Template matching or object recognition?

Problem: I have a photo of an object (a manufactured part like the attached photo below), using my Andoird phone camera I want to verify if the object in camera preview matches to the template or not. ...
4
votes
1answer
79 views

The small red peak in the CIE standard observer

The human eye has 3 types of color cones: red, green and blue. Their spectral sensitivity peaks in short (S, 420–440 nm), middle (M, 530–540 nm), and long (L, 560–580 nm) wavelengths. See diagram ...
0
votes
0answers
23 views

segmentation: how can I improve it?

I have written code which identifies the direction of arrow .I have used split and merge technique for segmentation ,It is sometimes stupid and I know that it is because of my predicate function which ...
1
vote
0answers
40 views

Feature selection of Gabor filter

I am working with Gabor filter with level set method here. As you known, gabor filter gave many filter output. Some of them is not necessary. Could you suggest to me some method that can choose best ...
0
votes
0answers
16 views

Problem in openCV casade classifier

I am trying to train cascade classifier using "opencv_traincascade" utility. I'm having 100 positive images and 500 negative images. I have created .vec file using following command: ...
1
vote
1answer
62 views

What's the state-of-the-art algorithms in image edge detection?

There are several state-of-the-art algorithms in image denoising including Non-Local Means, BM3D and so on. I am wondering whether there is some well-known state-of-the-art algorithms in image edge ...
2
votes
3answers
66 views

How to filter noise from continuous path in image

Problem statement In the dataset above, you can notice a continuous path and then a noise-band at around 320-400 on the x-axis. I want to be able to apply a filter that amplifies the continuous ...
0
votes
0answers
24 views

Best method for texture classfication

I am working in medical and nature images processing . I want to find a popular method to segment texture image. Could you suggest a popular method to do it? For example: Gabor filter, tensor...
0
votes
0answers
13 views

Extraction of a decision boundary (LDA) after a systematic querying of the feature space and convolution with Sobel filter (examples in numpy)

I am doing some experiments with LDA (Linear Discriminant Analysis), in python. Now I am at the point in which I would like to display the separation planes in the 3-dimensional feature space. I ...
0
votes
0answers
10 views

Scale Invariant Action Recognition from Human Silhouettes

For my project, I am considering a multi-camera setup for distributed action recognition for resistance against occlusion (under the assumption that the human figure is not occluded in all the cameras ...
0
votes
0answers
21 views

Extract notices from Newspaper

Here are my test image: and a result image: I used a simple thresholding, canny edge detection and contour method to get that region. However, some portions of the newspaper are being clipped. ...
-1
votes
1answer
63 views

Low pass filter to maintain edge information

I am looking for a kernel acting as a low pass filter that satisfies these conditions: $$K(-\mathbf{u})=K(\mathbf{u}) \tag{1}$$ $$K(\mathbf{u}) \ge K(\mathbf{v}), \;\; \text{if} \;\; ...
0
votes
1answer
53 views

Comparison between average kernel and gaussian kernel?

In image processing, we have two kinds of major kernels that are average kernel and gaussian kernel. For image segmentation, which is difference between average kernel and gaussian kernel? I found ...
0
votes
0answers
7 views

Remeshing methods to obtain same number of vertices and faces in aligned meshes

I've a set of aligned meshes (human femura surfaces). I would need to remesh each of these surfaces so they have exactly the same number of vertices and triangles. I need this because I'm building a ...
1
vote
1answer
50 views

Real Time Object Tracking using image processing [closed]

How we can track a single selected object from multiple detected moving objects using single fixed camara?
1
vote
1answer
57 views

Make a movie from multiple images in MATLAB [closed]

I have 10 images in the folder say "D:\images\" named as frame1,frame2,...,frame10. I want to make a movie from the color images with frame rate as per choice.Also i want to save created video file in ...