Questions tagged [image]
This tag is for questions related to the loading, formatting, saving, compression, and display of data representing pictures.
727
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Split all images over x amount of pages with $_GET
I would like to receive some feedback on the code I am currently using to display x amount of images on my website per
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2
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C : Image Segmentation
My primary coding language is C++, but I occasionally use C. I wrote some simple image segmentation using Union-Find algorithm. Feel free to comment anything!
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- 75k
1
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1
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235
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Sort and Delete duplicate image files
I'm trying to make a console application to sort and delete duplicate image files. I have a folder with about 20000 images which take up roughly 70GB of space.
I wrote the following script and it ...
- 2,009
2
votes
1
answer
175
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PNG steganography tool in C
This is a steganography tool enabling you to conceal any file within a PNG file. In order to compile the program you need libpng to be installed on the system. It is one of my personal projects and I ...
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3
votes
1
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Batch Insert Figures Into Powerpoint Slides with VBA
I have a series of images ("1.bmp", "2.bmp", "3.bmp",... ,"30.bmp" in "F:\Images" folder) and I am trying to insert these images one by one into ...
- 2,096
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GNUPlot Code for Plotting Three Dimensional Data
I am trying to plot three dimensional (multiple plane) data onto figures with various perspective view. The input data is tab-separated values in multiple file, and each file represent each plane. The ...
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1
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96
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A Tiny Image Tagger Implementation in C#
I am trying to implement a tiny image tagger with customized tag options in C#. The main window is as follows.
The left block is a picture box MainPictureBox and ...
- 4,708
5
votes
4
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853
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My code changes a single RGB value by a set amount, then does the same changes over the other channels
So I have the following code, that takes an image and modifies the RGB channels one at a time. It then creates a list of 9 images with the various modified channels.
The Red channel is modified by 0.1,...
- 501
118
votes
11
answers
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Fastest way to clamp an integer to the range 0-255
I'm working on some image processing code that can generate pixel values outside of the normal range of 0 to 255, and I'd like to clamp them back into the valid range. I know that there are saturating ...
- 75k
1
vote
2
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45
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A Simple Media Generator with Directional Control
My goal was to have a single page display bulk amounts of media without the need to load new pages. I also wanted it to be able to load fast, so the generator uses a JavaScript array to display one ...
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2
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1
answer
34
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SVG hue navigation bar
I've created a navigation spacer bar that has a hue background. To separate different aspects of content it was imported to Inkscape then exported as an SVG. It uses base64 image which I’m not sure is ...
- 188
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votes
1
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710
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Image Scrolling in UITableView with Parse
I'm trying to create an app that is scalable. One of the main features of the app is to view images from a database to a UITableView. Here is my code:
...
Mast♦
- 13.4k
8
votes
2
answers
459
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RGB <-> HSL converter + hue shifting
My input is basically a .png image from the img/ directory (I figured out that I should parse it, because there is an exploit ...
- 27.6k
0
votes
1
answer
2k
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Best way to preload images with callback on completion with pure JavaScript (ES6)
There are many related questions and answers but mostly with JQuery and/or from many years ago.
I prepared a version myself, and my question is whether this is currently (2020, hence ECMAScript 6 or ...
- 506
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vote
2
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cs50 filter(more comfortable) - Image filters in C
I've been taking cs50 for about under a month now and I've finally finished with "filter" in pset4. The code passes all the green checks on check50. Our task was to implement functions in <...
- 31.5k
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2
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339
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Implementation of oil-painting filter for images
This is web exercise 3.1.14. from the book Computer Science An Interdisciplinary Approach by Sedgewick & Wayne:
Set pixel (i, j) to the color of the most frequent value among pixels
with ...
- 12.4k
2
votes
1
answer
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Converting an equirectangular image to a cubemap
I've written a program that does three things:
Take an equirectangular image and ...
... cut horizontally-overlapping image areas.
... fill the image from the bottom with black so it has a ratio of 2:...
- 55.5k
9
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2
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Can I draw a square with pixels more efficiently?
I'm drawing a square on a window using an implementation of Xlib. I put a colored pixel with my_pixel_put at a specific (...
- 7,804
2
votes
1
answer
178
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 ...
CommunityBot
- 1
1
vote
1
answer
92
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Photo browser WPF app - performance improvements
I'm working on WPF photo broswer app as a personal project. I realise my current strategy for thumbnail handling is poor as I read in the full image each time -- this shows when browsing a folder with ...
- 6,277
5
votes
1
answer
2k
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Extract the data from Dicom files in an time efficient way
I am trying to extract and save images from a Dicom dataset. It is taking approximate 4-5 hours to process 1000 files. (Also, I am reading and saving files in an external hard drive so there is a time ...
- 5,573
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votes
0
answers
451
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Scraper for parsing, downloading, and setting images beside each link in an Excel file
I've written a script in VBA which is able to parse image links from a website, download and store them in a local folder and finally set those images beside each link in an Excel file.
As the script ...
Mast♦
- 13.4k
3
votes
1
answer
224
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Program for chopping overlapping image areas and filling up to a specific ratio
I've written a little program that I need for fixing two problems in my spherical panorama images.
It does two things:
If the image does overlap horizontally, it cuts away the overlapping pixels from ...
- 5,573
2
votes
1
answer
3k
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Get Date Taken from Image
Is there a better way of doing this? I heard that BinaryReader and Exif parsing to get the property item is faster, but I have no idea how to do that, thanks for the help.
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- 850
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1
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122
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Parallel image segmentation [closed]
Follow up question Image processing using Python OOP library
I want to use multiprocessing to analyze several images in parallel:
...
- 62k
9
votes
2
answers
4k
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C# Convert BLOB to jpg, resize, then back to BLOB
I am trying to convert a BLOB that is stored in a database to a JPG and then I need to display it on an ...
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votes
3
answers
1k
views
Fastest way to create random pixel image
I want to create a very big gigantic PNG image. The image pixel are generated randomly, being
How can I improve the below code to create a fast random pixel image in java?
...
- 390
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votes
1
answer
5k
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Scraping images from a webpage and saving it to a customized folder using vba
I've written a script in VBA which is able to scrape images from a webpage and save it to a customized folder successfully. Firstly, it scrapes the image link then downloads the image and rename it ...
11
votes
1
answer
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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 ...
5
votes
2
answers
729
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Analyzing the darkest pixels of an image in Python
This script takes an image copied from the clipboard and analyzes the n darkest pixels of the image. It will loop through each found value, prints out the value information and the quantity, then ...
- 5,573
10
votes
2
answers
20k
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Median Filter Implementation In Python
I implemented median filter in Python in order to remove the salt & pepper noise from the images. It is working fine and all but I would love to hear your advice or opinions.
...
6
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0
answers
243
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Buddhabrot made in CUDA
In the past I have made programs that have generate a buddhabrot with mostly success however all of them were on the CPU and single threaded. As a result they were all slow so I wanted to remake the ...
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1
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133
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how to make 'for loop' short in C? [closed]
I made some code about solar system stimulation in C. It is working, but it looks too long.
So, Are there some ways to shorten my code?
Also this website told me your code is too full to upload this....
- 156
5
votes
1
answer
340
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Applying gaussian blur on RGBA images
I designed the code and it works quite well for images of lower res. However my program takes a lot of time and ram to display higher res images (occupies 2GB RAM for 4k images and takes 20 minutes). ...
- 34.8k
3
votes
0
answers
196
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Doing image compression with Neural Network AutoEncoders
I wanted to create an image compressor using Machine Learning and started work on an "AutoEncoder". This is a type of Neural Network which takes in the image and creates a compressed vector form.
It ...
- 34.8k
6
votes
2
answers
279
views
Compressing large jpeg images
I'm working with thousands of large image files in a regularly updated library. The following script does the job (on average reduces my file size ~95%) but costs me around 25 seconds to compress one ...
- 43.3k
4
votes
0
answers
2k
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Taking a screenshot of a particular window
I've got a function which takes a screenshot of a particular window. It's important that the screenshot works whether the window is focused/covered by other windows or not, hence why I've used ...
- 34.8k
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votes
1
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247
views
Generating PNG barcodes through a GUI
This is a continuation of my earlier question, now updated to use a basic GUI. This is my first time using tkinter so I suspect there are a fair few things I'm missing! I've also added the ability to ...
- 2,089
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votes
2
answers
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Generating PNG barcodes from a CSV
I wrote the following code to generate a series of barcodes given a CSV with a list of ISBNs in the first column and titles in the second, using the python-barcode library (which itself requires ...
- 40.9k
22
votes
7
answers
7k
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Converting JPG images to PNG
I had a task to convert some JPG images into PNG format using Python. I successfully did it but I was wondering if somehow I could make my code better than my current one.
Code -
...
- 9,110
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votes
2
answers
145
views
Python image combiner reading writing
I am writing a simple script that will combine two images at a pixel level, selecting every other pixel from one image, and the other pixels from a second image.
...
- 43.3k
2
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0
answers
546
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Multi-threaded image convolution/pooling-python
This multi-threaded code takes an array of 3d images and applies the convolution function with padding, stride, pad values .. as parameters and same applies for creating pooling layers. I need ...
- 43.3k
3
votes
1
answer
199
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Optimizing custom JPEG decompression
The aim of my code is to decode an image format that is based on the JPEG chain of compression/decompression, however it is not compatible with the default JPEG flow as far as I know, since all ...
CommunityBot
- 1
2
votes
2
answers
499
views
Bitmap in Bitmap (Black & white)
Below is my attempt at bitmap in bitmap searching using 1bpp bitmaps.
Any suggestions on how I can reduce complexity and improve speed? Any comment is appreciated.
...
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votes
1
answer
74
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Automatic picture selector
I'm working on a project for digital marketing, I want to automate the upload of pictures. The program itself isn't done but here I came up with a way to keep track of which and when pictures have ...
- 7,250
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votes
1
answer
134
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Command line python script to generate image with n digits from MNIST data
A Python script to generate an image with a given number of digits from MNIST data on a single row.
Via arguments, the following can be specified (all optional, with defaults if necessary):
width of ...
- 7,250
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vote
1
answer
358
views
Convert image to grayscale
To convert JPEG file, C function, bgraToGrayscale is called from Swift.
Is there a better way to
1.allocate memory and
2.access pointers
than the ways they have been done in code below?
And ...
- 206
2
votes
0
answers
59
views
Generate Black and White confidence map masks for joints, same as OpenPose/Convolutional Pose Machines
Attached below is my code for generating the confidence maps for the joint locations, it is in the same vein as the maps generated for the paper Convolutional Pose Machines and OpenPose. I am ...
- 121
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votes
1
answer
303
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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 ...
- 34.8k
3
votes
1
answer
208
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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 ...
CommunityBot
- 1