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Questions tagged [image-processing]

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I'm making a piece of software that is able to recognize Magic the Gathering Cards from a picture or the actual camera. The codebase scans for rectangular shapes (cards) in an image and calculates ...
Martin's user avatar
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(FYI: I asked this question on stack overflow and was directed here) My problem is as follows: I have a dashboard running on a server at customer premises which updates every 15 minutes The dashboard ...
Imtiaz's user avatar
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I hope I can explain my question clearly. I'm planning to do some real time 2D grayscale image acquisition, and after reading some articles, I noticed that many are using buffers or multithreading or ...
GNZ's user avatar
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I am building a mobile client app that gathers info about movies/TV shows from a website and displays it in a pretty format. When the user clicks on a show, they are taken to a page with the thumbnail ...
James Ko's user avatar
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I am wondering how to take these Hieroglyphs and make them into Unicode. I read through the Tesseract docs on how to create training data, but it seems largely tailored toward "traditional" ...
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Display devices have their own PPI.Do these devices respect the DPI information of image file? If not, then what is use of"DPI" of image file? example: Image file- height: 1200 px width: 900 ...
sk patra's user avatar
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So I learned that the feature I am interested in is called a "displacement map". This makes it so you can take a blank t-shirt (with all it's curves and subtle textures), and apply an image to it so ...
Lance Pollard's user avatar
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I am currently writing a Python program that retrieves the pixels from two BMP files and finds the percent difference between them (without using the Pillow library for the purpose of learning). I can ...
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I want to be able to analyze a five-years archive of supermarket receipts. The receipts are scanned, and thanks to Google Cloud Vision API, the result of an OCR is available. Google's API, however, ...
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I am making a program using Java todo colo quantization using mean shift clustering algorithm and the image is RGB with resolution of 512x512. I want to reduce the image file size by reducing the ...
user10057710's user avatar
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I am looking for an approach / algorithm for using OCR (like Tesseract) to extract only bold text from an image. The Python code I wrote can already identify small letters and numbers, but it cannot ...
Sandun Dayananda's user avatar
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I have a problem with deciding algorithm for color quantization. The image that I want to do color quantization is an RGB image with resolution 512 x 512. I want to reduce the color value in the pixel ...
user10057710's user avatar
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Is it possible to scale a low resolution image to a highier resolution upto the point with minimum effect on quality, sharpness and other notable attributes of an image.
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I have been looking into object detection and tracking for a project that I am working on but I can't yet seem to find any techniques that I can make use of to utilise the information from object ...
Abs's user avatar
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Imagine a simple drawing of let's say a duck. And you have an photo of it in your database. Now a user takes a second photo of the same drawing of the duck. What approaches exist to check if both ...
Dennis Nedry's user avatar
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I am trying to create a web UI for image processing, with some operations similar to what a site like fotor.com offers. However, I have problems to achieve a similar performance. For example, lets say ...
BJ Patel's user avatar
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Would appreciate any recommendations regarding design a high-load image processing service. There are lots (tens of hundreds of relatively large images (~10...20 Mb each)) that to be processed using ...
Dmitry Karpezo's user avatar
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I'm trying to detect a clock hand in a video of an analogue display and extract the value it points to. I'm using Python with OpenCV for this. What I essentially do is: I'm using a Gaussian Blur to ...
Yggdrasill's user avatar
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I am trying to figure out how to use OpenCV with XCode's Swift. I need to do realtime video processing for the project I am working on, but I can't seem to find any good references on learning OpenCV ...
BillTheMagnificient's user avatar
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I am looking for an efficient way to compare 2 images and get the changed areas as a result. My current attempt has the following steps: Compare each horizontal line and keep the changed line index ...
eKKiM's user avatar
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When doing (possibly heavy) pixel processing on a large image, multithreading becomes a must. The standard practice is to initiate a loop whose indices are partitioned into multiple threads within a ...
MathuSum Mut's user avatar
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Any libraries, API, or tips are welcome. I am trying to draw Landsat 8 images using Canvas utility of Javascript on my browser. The grayscale reflectance values for Landsat 8 bands are from minimum -...
gaurav tripathi's user avatar
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I was looking to use OpenCV to program an image recognition app for iOS. One thing I wanted to check is if I were to charge $0.99 or $1.99 for the app, would I be breaking OpenCV's license? I didn't ...
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I'm not so sure whether this questions fits here, but I need help in this case, cause I'm searching for days to apply this. I have a website of rugs and carpets, in this website I would like ...
Arsi's user avatar
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I am currently applying some pre-processing to this dataset. Some of the digits are extremely rotated and I would like to know how others managed to get them 'upright'. I have implemented something ...
Norman Bentley's user avatar
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5 votes
2 answers
495 views

I have two friends that want to create a jewelry store, focused on customized jewels. The core feature is the jewelry designer, based on a jewel model. Here's an example of the sort of thing I am ...
Fabrício's user avatar
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1 vote
1 answer
6k views

I want to apply the k-means algorithm on an RGB image data-set. I don't know how to proceed. You can mention basic step by step flow to proceed. I do know basics of Image Processing & OpenCV.
yogesh_desai's user avatar
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Have two images with the same dimensions. I want to create a file that contains information on what pixels are different between the two images. The file should also tell me the value of the new ...
Saturn's user avatar
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I want to develop an app where users can upload an share images. I am planning to integrate a disclaimer which says that it is prohibited to upload images which contain crime, sex, insults etc. ...
Kewitschka's user avatar
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6 votes
1 answer
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I'm trying to identify an object (a cube) in a set of photos. Using Canny/Sobel/Hough I've managed to get the photo down to a set of lines that are pretty accurate; however if I plot these lines on my ...
Danny Tuppeny's user avatar
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I am attempting to build an attendance program which could analyze if someone is sitting in a seat. The seats are fixed making knowing where each seat is easy, but I don't really know where to start ...
carloabelli's user avatar
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7 votes
1 answer
5k views

We are currently developing an image processing restful api. Server performs some CPU-heavy computations image processing upon request and return the image to the client. We want to make this a ...
Tom Peach's user avatar
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1 answer
148 views

check this picture out before I explain further: How can I count the amount of lines there are from the yellow line to line #5? OCR sounds like overkill, because I don't really care what the text ...
user126682's user avatar
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1 vote
2 answers
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As the input, program would get a set of point (x,y), along with the time a certain point was drawn. (suppose on a tablet). Let's restrict ourselves to simple polygons. I implemented Hough transform,...
LeastSquaresWonderer's user avatar
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3 answers
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I have been thinking what could be the fastest way to show base64/img data to the user, i could generate the data when the user is registered and then store it to database, or generate it every time ...
Oscar Reyes's user avatar
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I have an N-vertex shape that I cut out from an image, and I want to project it onto another shape with the same amount of vertices, but different. So, the image will get changed inside the projection....
noncom's user avatar
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7 votes
1 answer
2k views

I have recently come across a promising Kth selection routine that reportedly outperforms quickselect the Floyd, Rivest Select routine. This Wikipedia article provides a pseudocode version which I ...
Andy Dansby's user avatar
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0 answers
117 views

I'm creating a web application that is visually enormous. I'm talking 2 million pixels wide and 2 million pixels tall (about). My goal is to show dynamically changing spots all over the site. For ...
ntgCleaner's user avatar
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2 votes
1 answer
3k views

I'm building an app where users list items for sale and they can include up to five photos for each item. I'm using Azure Blob storage for storing the images. In my app, I'll be displaying these ...
Randy Minder's user avatar
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1 vote
1 answer
950 views

I'm trying to make a small program in c#, that will downsample image to specified amount of colors (using K-means). Then, user will be able to hide\show colored areas(clusters) in image. I've ...
photostok's user avatar
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1 vote
1 answer
316 views

I saw this picture online and wanted to see if I could create an algorithm to give ordinary images an effect like this: http://justinlivi.net/wp-content/uploads/2011/01/Living_In_Digital.jpg My idea ...
user3525258's user avatar
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5 votes
0 answers
248 views

i'm trying to find a way to count barrels on an image. For this I'm using Hough Transformation. I tried my code first recognising eyes and it works excellent. But now the problems is when i try to ...
Ignacio's user avatar
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2 votes
1 answer
156 views

I would like to analyse a set of hundreds of thousands of product images (clothing, electronic goods etc) and retrieve the dominant colours in each. I'm only interested in the top 3 or 4 colours. The ...
codecowboy's user avatar
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0 votes
1 answer
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Given a set of images on a webpage, what's a good way to pick a compelling image that is also representative of the webpage? The use case is displaying an image along with a description of a URL to a ...
John Bachir's user avatar
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1 vote
1 answer
763 views

Given a colour image whose light intensity is dim at the edges and bright in the middle, such as [dim bright dim], which computer vision technique would be recommended to correct this imbalance? ...
BlackBox's user avatar
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3 votes
1 answer
123 views

Suppose I have two similar images as follows Image 1 (base) Image 2 (target) The second image is basically a variation of the first image, except with a green oval slapped on top (indeed, I used ...
MxLDevs's user avatar
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3 votes
1 answer
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I am implementing a Canny Edge detector for a class which I have based off the code found here. For the first derivative mask that I will convolve with the image, I am using the Sobel mask, although ...
user126713's user avatar
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2 votes
1 answer
2k views

I am trying to implement an algorithm for finding the zero crossing (check that the signs of all the entries around the entry of interest are not the same) in a two dimensional matrix, as part of ...
Seanny123's user avatar
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3 votes
0 answers
449 views

I'm trying to write a program to read GIMP curves files and apply them to an image. I have successfully implemented the curves for the red, green and blue channels, but I can't get it working for the ...
sjmeverett's user avatar
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3 votes
2 answers
10k views

I can't google this question, because I can't come up with a good query, so let me describe what I want and maybe someone will be able to suggest a way forward for me. I need to solve the following ...
Andrew Savinykh's user avatar
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