imageproc | An advanced image processing library for Rust | Computer Vision library

by chyh1990 Rust Version: Current License: MIT

X-Ray Key Features Code Snippets Community Discussions(8)Vulnerabilities Install Support

kandi X-RAY | imageproc Summary

imageproc is a Rust library typically used in Artificial Intelligence, Computer Vision, OpenCV applications. imageproc has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

Note: this project is under active depvelopment, API may change!.

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Support

imageproc has a low active ecosystem.

It has 95 star(s) with 6 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 1 have been closed. There are 2 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of imageproc is current.

Quality

imageproc has no bugs reported.

Security

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

License

imageproc is licensed under the MIT License. This license is Permissive.

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

Reuse

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

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

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imageproc Key Features

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imageproc Examples and Code Snippets

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Community Discussions

Trending Discussions on imageproc

Performant method of drawing text onto a png file?

Drawing bounding rectangle around the tumor cv2

Add new function signature for python and js in OpenCV

Color features extraction through clustering in image searching engine

using `draw_filled_circle_mut` in a function: trait bound not satisfied

How to rotate the center of the ModelVisual3D object along the x, y, and z axes in turn

Undefined reference to function errors, using C and C++ together

Does CvQuadEdge2D have an equivalent in OpenCV 3

QUESTION

Performant method of drawing text onto a png file?

Asked 2021-Mar-03 at 11:54

I need to draw a two-dimensional grid of Squares with centered Text on them onto a (transparent) PNG file. The tiles need to have a sufficiently big resolution, so that the text does not get pixaleted to much.

For testing purposes I create a 2048x2048px 32-bit (transparency) PNG Image with 128x128px tiles like for example that one:

The problem is I need to do this with reasonable performance. All methods I have tried so far took more than 100ms to complete, while I would need this to be at a max < 10ms. Apart from that I would need the program generating these images to be Cross-Platform and support WebAssembly (but even if you have for example an idea how to do this using posix threads, etc. I would gladly take that as a starting point, too).

Net5 Implementation ...

ANSWER

Answered 2021-Mar-03 at 11:54

I was able to get all of the drawing (creating the grid and the text) down to 4-5ms by:

Caching values where possible (Random, StringFormat, Math.Pow)
Using ArrayPool for scratch buffer
Using the DrawString overload accepting a StringFormat with the following options:
- Alignment and LineAlignment for centering (in lieu of manually calculating)
- FormatFlags and Trimming options that disable things like overflow/wrapping since we are just writing small numbers (this had an impact, though negligible)
Using a custom Font from the GenericMonospace font family instead of SystemFonts.DefaultFont
- This shaved off ~15ms
Fiddling with various Graphics options, such as TextRenderingHint and SmoothingMode
- I got varying results so you may want to fiddle some more
An array of Color and the ToArgb function to create an int representing the 4x bytes of the pixel's color
Using LockBits, (semi-)unsafe code and Span to
- Fill a buffer representing 1px high and size * countpx wide (the entire image width) with the int representing the ARGB values of the random colors
- Copy that buffer size times (now representing an entire square in height)
- Rinse/Repeat
- unsafe was required to create a Span<> from the locked bit's Scan0 pointer
Finally, using GDI/native to draw the text over the graphic

I was then able to shave a little bit of time off of the actual saving process by using the Image.Save(Stream) overload. I used a FileStream with a custom buffer-size of 16kb (over the default 4kb) which seemed to be the sweet spot. This brought the total end-to-end time down to around 40ms (on my machine).

Source https://stackoverflow.com/questions/66241394

QUESTION

Drawing bounding rectangle around the tumor cv2

Asked 2020-Apr-22 at 16:27

I am working on a project which predicts that the MRI has tumor or not, now the next step is to draw a bounding rectangle around the tumor. I was able to extract the tumor from the MRI, now I want to get the opposite corners of the rectangle to bound the tumor in original figure.

EDIT: For some of the MRI images the I cannot separate the the tumor from MRI, calculated the threshold using OTSU method seperately but its not working properly. Thank you !

Computing threshold:

...

ANSWER

Answered 2020-Apr-22 at 01:43

I think the best way is to know where pixels are not black

Source https://stackoverflow.com/questions/61355867

QUESTION

Add new function signature for python and js in OpenCV

Asked 2019-Mar-18 at 08:13

I've updated the grabCut function (opencv-master/modules/imgproc/src/grabcut.cpp) and also added some new functions in the imageproc module. For that I've updated the opencv-master/modules/imgproc/include/opencv2/imgproc.hpp file as:

...

ANSWER

Answered 2019-Mar-18 at 08:13

Updating in the file modules/js/src/embindgen.py worked.

Source https://stackoverflow.com/questions/55194047

QUESTION

Color features extraction through clustering in image searching engine

Asked 2017-Dec-10 at 18:41

I'm trying to implement a perceptual-based image searching engine, that will allow users to find pictures, containing objects of relatively same or close colours to the user-specified template(object from the sample image).

The goal for now is not to match a precise object, but rather to find any significant areas that are close in color to the template. I am stuck with indexing my dataset.

I have tried some clustering algorithms, such as k-means from sklearn.cluster (as I've read from this article), to select centroids from the sample image as my features, that are eventually in CIELab color space to acquire more perceptual uniformity. But it doesn't seem to work well, as cluster centres are generated randomly and thus I've got poor metrics results even on an object and image, from which that same object was extracted!

As far as I'm concerned, a common algorithm in simple image searching programs is using distance between histograms, which is not acceptable as I try to sustain perceptually-valid colour difference, and by that I mean that I can only manage two separate colours (and maybe some additional values) to calculate metrics in CIELab colour space. I am using CMCl:c metric of my own implementation, and it produced good results so far.

Maybe someone can help me and recommend an algorithm more suitable for my purpose.

Some code that I've done so far:

...

ANSWER

Answered 2017-Dec-10 at 18:41

The usual approach would be to cluster only once, with a representative sample from all images.

This is a preprocessing step, to generate your "dictionary".

Then for feature extraction, you would map points to the fixed cluster centers, that are now shared across all images. This is a simple nearest-neighbor mapping, no clustering.

Source https://stackoverflow.com/questions/47663559

QUESTION

using `draw_filled_circle_mut` in a function: trait bound not satisfied

Asked 2017-May-18 at 10:00

Using imageproc crate, I can call draw_filled_circle_mut on an Image:

...

ANSWER

Answered 2017-May-18 at 10:00

fn circle(img: &mut RgbImage) {
    draw_filled_circle_mut(&mut img, ...

Source https://stackoverflow.com/questions/44041978

QUESTION

How to rotate the center of the ModelVisual3D object along the x, y, and z axes in turn

Asked 2017-May-12 at 06:47

I have 200 pictures,and I want to build a cube with 200 pictures one by one . now I have built the cube,I want to finish the function is the center of the cube in turn rotate along the x y z axis, now I have built the cube ,and set the Viewport3D.Camera. I want to just rotate the cube ,and keep the cube In the camera field of view， use code in C# to finish the function. now I will copy my code both in xaml and C# to help you understand my code.

my code in xaml：

...

ANSWER

Answered 2017-May-12 at 06:47

now, I will post my code, the code's aim is to rotate a 3D cube object.

code in xaml:

Source https://stackoverflow.com/questions/43870632

QUESTION

Undefined reference to function errors, using C and C++ together

Asked 2017-Apr-21 at 10:12

I have run into a problem while using C and C++ code together. The 'make' command returns "Undefined reference to function" for all functions in SPConfig.c and SPLogger.c, when called from SPImageProc.cpp

#include sections of these relevant files are given below:

SPLogger.c

...

ANSWER

Answered 2017-Apr-21 at 09:53

You are not linking SPLogger.o and SPConfig.o

Or even compiling them for that matter.

You need to add make rules for SPLogger.o and SPConfig.o similar to SPImageProc.o and you need to add them to OBJS.

Source https://stackoverflow.com/questions/43539356

QUESTION

Does CvQuadEdge2D have an equivalent in OpenCV 3

Asked 2017-Mar-14 at 15:24

I am using OpenCV 3.2 with Netbeans 8.0 on Ubuntu 16(LTS).

CvQuadEdge2D was quite useful in OpenCV 2 but appears to be gone from OpenCV 3. The closest I could find was

...

ANSWER

Answered 2017-Mar-14 at 15:24

In OpenCV 3 the concept behind CvQuadEdge2D is in Edge.

Now you can navigate through edges using getEdge. You can get the list of the vertices of all edges using getEdgeList

QuadEdge itself is a protected member of the class Subdiv2d, so you cannot access it. You should use the new Edge interface.

Source https://stackoverflow.com/questions/42789323

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

Vulnerabilities

No vulnerabilities reported

Install imageproc

You can download it from GitHub.
Rust is installed and managed by the rustup tool. Rust has a 6-week rapid release process and supports a great number of platforms, so there are many builds of Rust available at any time. Please refer rust-lang.org for more information.

Support

imageproc use cross-platform native library to decode/encode images. The only supported backend is FreeImage, it includes decoders for most image formats, and encoders for most common used formats.

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