halftone | Generate CMYK halftone images | Computer Vision library

by ClayFlannigan Python Version: Current License: Apache-2.0

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | halftone Summary

halftone is a Python library typically used in Artificial Intelligence, Computer Vision applications. halftone has no bugs, it has no vulnerabilities, it has build file available, it has a Permissive License and it has low support. You can download it from GitHub.

A python module that uses creates CMYK images and halftone representations. Heavily adapted from this StackOverflow answer by fraxel and this code by Phil Gyford. Creates four CMYK images and a combined image. Provides options for haltoning or not (-d). | OPTION | DESCRIPTION | Default | | ---------------------- | ----------------------------------------------- | ------- | | -h, --help | show this help message and exit | n/a | | -b, --bits {1,2,4,6,8} | bits of color info per channel | 8 | | -c, --colorize_CMYK | save CMYK files as RGB color images | False | | -d, --do_not_halftone | don't do halftoning | False | | -e, --extra_file_name | final name addition for each channel | "_Clr" | | -f, --fill | dot fill (size) value | 0.5 | | -g, --gray | percent of gray component replacement (K level) | 100 | | -p, --sharpness | level of sharpness of the dots | 1.0 | | -s, --size | half size of averaging region (pixels) | 3 |.

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Quality

Security

License

Reuse

Support

halftone has a low active ecosystem.

It has 16 star(s) with 4 fork(s). There are 5 watchers for this library.

It had no major release in the last 6 months.

There are 1 open issues and 0 have been closed. On average issues are closed in 1363 days. There are 1 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of halftone is current.

Quality

halftone has no bugs reported.

Security

halftone has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

halftone is licensed under the Apache-2.0 License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

halftone releases are not available. You will need to build from source code and install.

Build file is available. You can build the component from source.

Installation instructions are not available. Examples and code snippets are available.

Top functions reviewed by kandi - BETA

kandi has reviewed halftone and discovered the below as its top functions. This is intended to give you an instant insight into halftone implemented functionality, and help decide if they suit your requirements.

Write image to tiff file .
Calculate the halftone image .
Convert an integer to a hex string .
Generate a Gaussian Kernel
Flattens an image into a single array .
Create a tag array .
Convert from RGB to CMYK .
Test if the RGB color is valid .
Resize array .
Crop the center of the image .

Get all kandi verified functions for this library.

halftone Key Features

No Key Features are available at this moment for halftone.

halftone Examples and Code Snippets

No Code Snippets are available at this moment for halftone.

Community Discussions

Trending Discussions on halftone

Improving halftone / particles performance in P5js

Win32 Window Doesn't Draw After minute or so

How created design dotted background

Calculating correct position of image in Picture Control, and drawing the background correctly (on MFC dialog)

Is using multiple halftone screens on the same page allowed in postscript 3?

How can i write a line in a pdf with a gradient with ghostscript/postscript with tiffsep1 device?

Scrollbars for Matplotlib Figure in Tkinter

Avoid dots in white spaces with custom halftone screensets

How to write these `convert` commands in Magick++?

svg rotate hexagon pattern - hexagon point to top

QUESTION

Improving halftone / particles performance in P5js

Asked 2021-Apr-23 at 12:45

I want the dots to react smoothly so I’m wondering if there’s a way to improve performance on this code.

I’m trying to create an isometric grid of dots that serves both as a halftone effect (which I have reached) and a particle system that reacts to mouse location (gravity / repel).

Because it’s supposed to act like a halftone image, the density of the dots should remain rather high. Any idea would be greatly appreciated

...

ANSWER

Answered 2021-Apr-23 at 12:45

Tl;dr: web editor

When trying to make code more efficient, one of the best things to do is do as little as possible during your loops. In the draw() block, you have a nested for loop. This is actually kind of a double-nested loop because draw() is a loop in itself. That means that at the deepest level of your loops (when you're iterating over j), you have to do those things many times, and every single frame. It is actually possible to reduce the deepest part of your nested loop to only one command: drawing the circle at the proper location and size.

Some suggestions I'm making here will make your code far less readable. These suggestions are only good for when you need to do things faster, and in order to maintain readability, I'd recommend putting in comments.

Some examples in your code:

for every single circle and every single frame, the computer sets the fill color twice (both times to the same color), it sets the strokeWeight to 0, and the stroke color to 255. None of that is necessary. In fact, that stuff can go into the setup() block because it is the same for every frame.
You draw two circles at each point and frame. If the second one is bigger, the first is invisible. You might be surprised at how much work it takes for a computer to draw things on the screen. It's best to minimize that: only draw one circle. You can set the size by using max(), and you can also use circle() instead of ellipse() (I don't know if it's actually any faster to use circle(), but it looks nicer to me):

Source https://stackoverflow.com/questions/66829627

QUESTION

Win32 Window Doesn't Draw After minute or so

Asked 2021-Apr-06 at 10:12

I am in a sticky situation.

I'm messing around with Bitmaps and windows.

I followed this tutorial: https://docs.microsoft.com/en-us/windows/win32/gdi/capturing-an-image

I am basically taking multiple pictures of my desktop and displaying them into a window.

It works great as intended but after like a minute or 2 the window won't update and I can't find the error or why this is occurring.

Here is the code:

...

ANSWER

Answered 2021-Apr-06 at 09:52

I think you have spent all resources. For example,

You create bitmap every cycle and don't release it.

You call SelectObject and don't return selected object to original state.

Source https://stackoverflow.com/questions/66966248

QUESTION

How created design dotted background

Asked 2021-Feb-06 at 09:46

have you any idea how to created dotted background like:

https://www.123rf.com/photo_55576363_stock-vector-halftone-seamless-pattern-abstract-background-with-black-dots-.html

only with css code? I don't know how create this shape and shadow effects and google can't help me. :-) I can only do the basic step like:

...

ANSWER

Answered 2021-Feb-06 at 09:45

You can approximate this using drop-shadow filter combined with radial-gradient()

Source https://stackoverflow.com/questions/66075331

QUESTION

Calculating correct position of image in Picture Control, and drawing the background correctly (on MFC dialog)

Asked 2020-Oct-19 at 09:34

I have this dialog:

Here is the RC for the dialog:

...

ANSWER

Answered 2020-Oct-19 at 09:34

Here is my solution:

Source https://stackoverflow.com/questions/64417683

QUESTION

Is using multiple halftone screens on the same page allowed in postscript 3?

Asked 2020-Sep-10 at 11:04

I am working with a postscript file that uses sethalftone several times on the same page. On my printer I get the expected results but when using ghostscript, the whole page is rendered with the same screen. I reduced it down to this example:

...

ANSWER

Answered 2020-Sep-10 at 11:04

You can change halftone at any point in the course of a PostScript program. It need not be at the start of a page or start of a program.

Source https://stackoverflow.com/questions/63827886

QUESTION

How can i write a line in a pdf with a gradient with ghostscript/postscript with tiffsep1 device?

Asked 2020-Aug-01 at 17:31

I'm tring to modify a pdf with ghostscript via a ps file for add a transversal line, but it don't work for this file.

Input files

I tried:

...

ANSWER

Answered 2020-Jul-30 at 07:23

The content of your PDF files contains no transparency operations, so they are opaque. In the case of your B&W file the only marks made on the page are the black areas, in the case of your Gradient file, almost the entire page is marked by the gradient fill.

The BeginPage PostScript procedure is executed at the beginning of the page, before the page contents are processed.

So what happens is that a black line is drawn, then the black marks from the B&W file are drawn. Where the black line is not covered by the black areas of the page contents you can see the line (had you drawn the line in, say, red, you would see where the black areas cover the line).

Your gradient file covers the entire area where the initial black line was drawn, so you can't see any of it.

If you want the line drawn 'on top' of the page content, then you need to use an EndPage procedure, not a BeginPage.

Source https://stackoverflow.com/questions/63166024

QUESTION

Scrollbars for Matplotlib Figure in Tkinter

Asked 2020-Jul-24 at 01:09

I am trying to get scrollbars to work in Tkinter for matplotlib figures. The scrollbars don't adjust to the width and height of the loaded image and I don't know how to troubleshoot this. Any help would be appreciated.

Image:

End Result:

Code:

...

ANSWER

Answered 2020-Jul-24 at 01:09

matplotlib figures are canvases. Therfore, its container frame won't resize to it, and bbox("all") won't work. Instead, we have to update the matplotlib canvas size to match the figure size and the toplevel canvas scrollregion to the figure size.

Here is the working output.

Working Output

Here is the working code.

Code

Source https://stackoverflow.com/questions/63061101

QUESTION

Avoid dots in white spaces with custom halftone screensets

Asked 2020-Jan-17 at 10:55

I am trying to set up custom angle/frequency halftone screensets with ghostscript and ran into a peculiar problem. The resulting output contains black dots where there should be none.

As a reproducer I found this code:

...

ANSWER

Answered 2020-Jan-17 at 10:55

As noted by @KenS this was a bug in ghostscript that has been resolved.

Source https://stackoverflow.com/questions/58739422

QUESTION

How to write these `convert` commands in Magick++?

Asked 2019-Jul-27 at 02:04

I've decided on using Magick++ for my application. I know which convert commands I want to use but I don't know how to translate them into Magick++ code.

My application should quantize the colors in a imported image using a fixed hardcoded palette, with optional dithering (F-D, Riemersma, Bayer, Halftone, Random). It then passes the output to some later code.

Here are the commands that give me the results I want. Each one is individual, which one "gets run" depends on user set flags.
Also, palette.png will be a Image object generated on run and is not actually read from file.
Also, again, out.png will not be exported to file and will be instead be another Image object passed onto later code.

...

ANSWER

Answered 2019-Jul-27 at 02:04

For -dither operator, use Magick::Image.quantizeDitherMethod() method.

Source https://stackoverflow.com/questions/57228277

QUESTION

svg rotate hexagon pattern - hexagon point to top

Asked 2019-Jun-30 at 22:36

How do I rotate my pattern of hexagons so that the hexagon point is at the top and the pattern is consistent across the page

...

ANSWER

Answered 2019-Jun-30 at 22:32

Here is the new code with comments:

Source https://stackoverflow.com/questions/56828467

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install halftone

You can download it from GitHub.
You can use halftone like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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