Questions tagged [image]

This tag is for questions related to the loading, formatting, saving, compression, and display of data representing pictures.

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9
votes
1answer
108 views

Maze image solver and animator in Python

This maze solver is a continuation to the maze generator I posted here recently Maze generator & animator in Python This code takes an image containing a 2-color maze as input and solves the maze ...
14
votes
1answer
601 views

Maze generator & animator in Python

This is a follow up to this code and I still did not get the feedback on the drawing functions Maze generator in Python- Gif animator-Custom colors/sizes The code generates custom color and size ...
9
votes
1answer
213 views

Maze generator in Python- Gif animator-Custom colors/sizes

This Python code generates mazes with color and size customization. I intend to add several new maze generating algorithms(Sidewinder, Kruskal, Prim ...) to the Maze class but for now, there is only ...
1
vote
1answer
66 views

Add watermark to images

Recently, I started reading image processing via opencv library in python. I create a minio object storage and upload some photos into it. After that, I wrote a program which reads every image in ...
1
vote
0answers
35 views

Photo rename by Exif date and group into folders with a threshold

I wrote this tiny F# project yesterday, but I am a bit rusty and I would like to know if there is anything I can refactor and make more elegant. ...
4
votes
1answer
49 views

Command line utility to convert image formats of photos

Below is some code for a basic command line utility to convert image formats of photos. I'm wondering how any part of it might be written with better style, i.e. how it could be neater, clearer and ...
3
votes
1answer
72 views

Apply a sepia filter to an image

I'm writing a simple function that applies a Sepia filter to an image. My function works, but I'm a beginner gopher. So I would like to know if there is a way to improve the code. I usually code in ...
1
vote
0answers
53 views

ViewModels for image transformations

In my project I have a chain of Fragments where each one gets a bitmap, manipulates it, then sends it to another fragment for more processing. My fragment chain looks like this: CaptureFragment -> ...
3
votes
1answer
72 views

Stereo image matching implementation in Halide

The authors of this paper compute support_points of a 900×700 image in 118 ms. I have implemented their algorithm below in Halide. In my algorithm, the nested for loops over length and width iterate ...
5
votes
1answer
69 views

Rust code of a tree fractal

I just picked up Rust recently and this is my first program (longer than 10 lines at least) so I'm looking for constructs that are more native and natural to Rust. I come from a c++/ python background....
2
votes
1answer
79 views

Image Processing - Comparing 2 images and Ranking Similarity

My code compares 2 images of any shape/dimension and ranks them in order of similarity. It starts with reading from a CSV file with columns image1, image2 which contain absolute paths and then ...
8
votes
1answer
148 views

Bilinear image interpolation

I have written a bilinear interpolant, which is working moderately well except that is painfuly slow. How can rewrite the code to make it faster? Using opencv directly isn't a valid answer. ...
1
vote
1answer
31 views

Rails controller method to show an optionally scaled image using MiniMagick

I've got below implementation for my controller and show action which implements MiniMagick gem. I've just wondering is there any better way to write it down? If ...
0
votes
1answer
31 views

Upload image with GD library

First of all I just started learning OOP. My priority is to make safe code. I think my code is safe, because I use GD to make a copy of the uploaded image and I use an image proxy to make sure nobody ...
5
votes
0answers
39 views

Interfaces and OOP Design for Image Editor software

I'm new to C++ programming, and I'm building an Image Editor software like Lightroom/CameraRaw from scratch. Apart from procedural code (actually seems that all the functions works correctly) my goal ...
6
votes
0answers
29 views

Drawing a line in any direction with pixels

I am doing an image drawing and rendering library, and would like some feedback on this code, it simply draws a line in any direction. The equation for that is: m = (y2 - y1) / (x2 - x1) b = y1 - m ...
4
votes
2answers
82 views

Edge detection in a canvas

I have one function in my code to detect edges in a canvas but it's the slowest part of my code and is used everywhere. If I could just optimise this, my whole program would speed up considerably. ...
2
votes
0answers
20 views

Create mosaic task #2

This post is a continuation of post here: Create mosaic task. I improved code readability, hopefully it'll be reviewable now. Once again, I'm asking for tips to write better code. Task: The point ...
5
votes
0answers
48 views

Tensorflow loop to analyze gradients derived from MRI and PET images

The code shown below takes the partial derivative of each pixel of the output fused image of a neural network with respect to input image of the neural network using tensorflow's ...
7
votes
1answer
41 views

Bash script to encode images in base64 and generate a CSS file from them

These are the first lines of code I've ever written. I've been interested in the idea of learning to program for quite a while, but never really pulled the trigger, and now I've been playing around ...
2
votes
0answers
23 views

jQuery code to display images served by PHP, without reloading

My php page displays a slider of images and when the user clicks on an image(.item), the div below (#team_single) changes the content without reloading the page. Content of the div changes also when ...
6
votes
1answer
60 views

Get nearest major city of an image (using EXIF GPS data)

I am writing a program that will take images in a folder, get the GPS Coordinates (from the EXIF data), then return the closest "major city". (I define a major city as one with an airport, so ...
3
votes
0answers
105 views

Converts audio files to fixed size chunks and the chunks to spectrogram images

This code takes in input as audio files (.wav or .WAV) and divides them into fixed-size (chunkSize in seconds) samples. Then these chunks are converted to spectrogram images after applying PCEN (Per-...
1
vote
0answers
54 views

Proper image sizes in WordPress

I wanted to create a set of functions that would allow me to easily implement images for multiple screen resolutions in my custom page templates. WordPress offers some functionality for implementing ...
11
votes
1answer
58 views

Visualization of the Pythagorean theorem

Background The Pythagorean theorem asserts that for a right triangle with hypotenuse \$c\$ and other sides \$a\$ and \$b\$, the area of the square placed upon \$c\$ is equal to the sum of the areas ...
5
votes
1answer
115 views

Create mosaic task

I tried to apply for software engineer - intern with this task, and there is no reply since I sent it, so I guess I failed. Can you give me a direction in what way I should improve my code? Task: The ...
1
vote
0answers
50 views

Python3 - Cropping PDF files according to coordinates

I have a python script, that is performing OCR on PDF pages. I am trying to do so I can provide coordinates to the script - so it will only select the text within the provided coordinates ...
1
vote
0answers
104 views

JavaFX lazy loading of images in TableView

This code is based off https://stackoverflow.com/questions/25711103/javafx-combobox-lazy-loading-images but modified to work with a TableCell Firstly, the model object should have an observable ...
4
votes
1answer
60 views

U-Net: A TensorFlow model

What I want to know I am writing a ML model called U-Net with Python (and TensorFlow). My question is not about the machine learning or Tensorflow, I want to know the best structure of the code. I ...
3
votes
0answers
50 views

Pygame : processing speed independant image loop displayer

I made this in order to teach myself pygame. This displays an images loop at the same speed on any computer (It will lag on a slow computer). Is my time management good or do my datetime call could ...
5
votes
1answer
93 views

Find png files in folder structure and map them to Photoshop groups and layers

I've created a heavily problematic code that works. Summary: It looks through a folder structure, for png files and tries to replicate this structure in Photoshop. Files are mapped layers and Folders ...
4
votes
2answers
93 views

Binary genetic programming image classifier's fitness function

I am trying to figure out how to improve my binary image genetic programming classifier's fitness. It takes images and classifies them if it has some feature X or not in it. These are the main ...
5
votes
1answer
62 views

Extracting watermark from a video using Python

I'm extracting a few frames from a video: Comparing the similarity or equality of pixel color (from first two images) Saving to a new image Comparing the new image (conjunction of first two images) ...
6
votes
1answer
82 views

Per pixel Image Computation with Gamma Correction in OpenGL and C [closed]

I've been working on a way to optimize pixel computation in OpenGL with C. If this information helps, my current environtment = Linux (terminal) + GPU (Nvidia 1080Ti). I'm working with old OpenGL (...
35
votes
7answers
4k views

Increase performance creating Mandelbrot set in python

I created a program in python that generates an image of the mandelbrot set. The only problem I have is that the program is quite slow, it takes about a quarter of an hour to generate the following ...
3
votes
2answers
129 views

WPF Bitmap / BitmapFrame to multi-page / multi-frame TIFF with JPEG encoding

I was searching for a long time how to write multi-page TIFFs with the JPEG encoding. TIFFs support JPEG encoded frames but the built-in encoder in .NET Framework does not have JPEG as a compression ...
1
vote
0answers
35 views

How to speed up the retrieval of the corners of a mask

I have trained a polygon detector neural network to recognize the mask of "quadrilateral" (the mask generates curvy lines so it's not exactly a quadrilateral). I would like to get the corners of the ...
4
votes
2answers
116 views

C++ Pixel/Array manipulation libs

I was tired to always perform pixel manipulation one by one, so I started to create my own templated header to perform computation over pixel (RGB, or RGBA), but I also make it for ND for some cases. ...
1
vote
1answer
41 views

Bash function to produce variants of images at 2X and 3X resolutions

I use ImageMagick to crop image, encapsulate the related code to functions. Here is the code: ...
2
votes
1answer
288 views

Inverse mapping with bilinear interpolation on an image

The following is my solution for an inverse mapping with bilinear interpolation on an image. The original image is img and ...
2
votes
1answer
47 views

GIF/PPM to greyscale converter

This is my take on an image → greyscale converter. ...
3
votes
3answers
173 views

Image filter for gradient detection

This filter is basically gradient detection (the variable gradImg) like an edge detection (Sobel or Prewitt filters) and also the direction of that gradient whether ...
3
votes
0answers
78 views

Export EXIF data from thousands of images to CSV

I have written a script that retrieves specific fields of Exif data from thousands of images in a directory (including subdirectories) and saves the info to a csv file: ...
4
votes
1answer
56 views

Analyzing spoke overlaps during rotation: Round 2

Round 1: Analyzing spoke overlaps during rotation I previously posted this question, but I've changed a lot of the code since then. There was a mention of the previous being a bit mixed up, and ...
6
votes
1answer
58 views

Analyzing spoke overlaps during rotation

For a personal project that I've recently started I have to analyze the rotation of two shapes with sets of spokes, where the spokes are evenly-spaced, and split into a given number. That is, if I ...
2
votes
0answers
97 views

LSB Image Steganography

After learning the concept of steganography, I've decided to code an application for it in PHP out of all languages, using the Least Significant Bit technique. A pixel of a colored image generally ...
6
votes
1answer
1k views

Trimming blank space from images

I am working on scanned documents (ID card, Driver licenses, ...). The problem I faced while I apply some preprocessing on them is that the documents occupy just a small area of the image, all the ...
2
votes
1answer
108 views

Making a catalog of pictures

Is there a way to make this code run faster? I have over 6000 pictures in .jpg optimized to a maximum of 40 kB. It starts quickly but after like 2000 pictures it runs way slower. The final .xlsm file ...
2
votes
0answers
54 views

Extracting face features from selfies faster

My code takes two .jpg files (two selfies) and extracts a vector of 128 features from each selfie. After this extraction we take these two vectors and get their cosine distance. I timed the script ...
3
votes
1answer
372 views

Image pre-processing and segmentation

I'm new learning python and image processing with python. For this reason, I took a project called "Classification of breast cancer images with deep learning". I applied the following techniques: 1)...