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# Questions tagged [image-processing]

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1 vote
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### Algorithm to find most likely continuation of image over border from set of possible next images

Is there an algorithm that would fit in the following situation: I have a sub image A of a larger image, and a set of sub images B that could (but not necessarily) share border with A. Now the ...
• 111
8 views

### Partial derivatives wrt input and weights in CNNs

I'm working on understanding the backpropagation process in convolutional neural networks (CNNs) and am having some trouble comprehending how to calculate the partial derivatives of the output of a ...
91 views

### Accuracy of Digit Recognition with Template Matching

I have designed a C++ program to recognize the digits on an ID card based on OpenCV. First I preprocess the ID card image and then segment it based on contours. The segmentation results are as ...
• 11
39 views

### How to unscramble an RGB image 1024x1024

I have a colored image 1024x1024 whose rows and columns were randomly shifted, how would I unscramble it without having any information about the original image?
69 views

### $N \times N$ Image Processing Time Complexity: Grayscale to Binary using Median Step Function

In an image processing system, an algorithm processes an $N \times N$ image with each pixel being a number between $0$ and $255$. It finds the median value $M$ in the $N \times N$ image and applies ...
29 views

I wanted to see what models would be best suited for providing a image (see the link below) and having the model perform a image to text (OCR of some kind) and laying out the contents of the image in ...
• 101
11 views

### What is a good appropriate algorithm for localization for images?

Assume that you have an image that you going to classify its class ID. One good option is to use interest points e.g FAST that can find coners/edges inside an image. From these points you could ...
• 97
1 vote
69 views

### Detecting thin lines in binary images

I want to find areas in a binary image that correspond to long and thin curves. In the example below, structures thinner than 3 pixels but longer than 20 pixels are highlighted. Observe that the ...
124 views

• 131
1 vote
29 views

### What is the best algorithm for detecting the texture of a person's clothes in real-time for a mobile robot?

I am working on the human following robot. the robot extracts a feature of clothes's texture and distinguishes between the people that they stand up in front of the robot. So, the robot needs that it ...
• 111
404 views

### Greyscale image to binary image conversion using operations on pixel

Previously, I tried convert a color image into a greyscale image by using pixel values of an image from a simple formula :- Grey = 0.3*Red + 0.58*Green + 0.11*Blue ...
1 vote
475 views

### An algorithm to find the closest match between 2 arrays of RGB pixel tuples

So I'm looking for a bit of an abstract algorithm and I'd appreciate any references to read up on. This is a bit tough to explain but I'll try my best. Suppose we have 2 arrays of ...
• 133
44 views

### Image/Video deblurring

I am currently working on an algorithm that will help to improve shaken blurry images. I know there are plenty of them, such as deconvolution, that is pretty useful though I don't really know how to "...
• 21
1 vote