imaginary | ready HTTP microservice for high-level image processing | Computer Vision library

 by   h2non Go Version: v1.2.4 License: MIT

kandi X-RAY | imaginary Summary

kandi X-RAY | imaginary Summary

imaginary is a Go library typically used in Artificial Intelligence, Computer Vision applications. imaginary has no bugs, it has no vulnerabilities, it has a Permissive License and it has medium support. You can download it from GitHub.

Fast HTTP microservice written in Go for high-level image processing backed by bimg and libvips. imaginary can be used as private or public HTTP service for massive image processing with first-class support for Docker & Fly.io. It's almost dependency-free and only uses net/http native package without additional abstractions for better performance. Supports multiple image operations exposed as a simple HTTP API, with additional optional features such as API token authorization, URL signature protection, HTTP traffic throttle strategy and CORS support for web clients. imaginary can read images from HTTP POST payloads, server local path or remote HTTP servers, supporting JPEG, PNG, WEBP, HEIF, and optionally TIFF, PDF, GIF and SVG formats if libvips@8.3+ is compiled with proper library bindings. imaginary is able to output images as JPEG, PNG and WEBP formats, including transparent conversion across them. imaginary also optionally supports image placeholder fallback mechanism in case of image processing error or server error of any nature, therefore an image will be always returned by the server in terms of HTTP response body and content MIME type, even in case of error, matching the expected image size and format transparently. imaginary uses internally libvips, a powerful and efficient library written in C for fast image processing which requires a low memory footprint and it's typically 4x faster than using the quickest ImageMagick and GraphicsMagick settings or Go native image package, and in some cases it's even 8x faster processing JPEG images. To get started, take a look the installation steps, usage cases and API docs.
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            kandi-support Support

              imaginary has a medium active ecosystem.
              It has 4963 star(s) with 426 fork(s). There are 74 watchers for this library.
              OutlinedDot
              It had no major release in the last 12 months.
              There are 106 open issues and 160 have been closed. On average issues are closed in 187 days. There are 10 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of imaginary is v1.2.4

            kandi-Quality Quality

              imaginary has 0 bugs and 0 code smells.

            kandi-Security Security

              imaginary has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              imaginary code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              imaginary is licensed under the MIT License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              imaginary releases are available to install and integrate.
              Installation instructions, examples and code snippets are available.
              It has 3719 lines of code, 223 functions and 29 files.
              It has high code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

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            imaginary Key Features

            No Key Features are available at this moment for imaginary.

            imaginary Examples and Code Snippets

            r Compute the eigenvalues of a Hermitian tridiagonal matrix .
            pythondot img1Lines of Code : 355dot img1License : Non-SPDX (Apache License 2.0)
            copy iconCopy
            def eigh_tridiagonal(alpha,
                                 beta,
                                 eigvals_only=True,
                                 select='a',
                                 select_range=None,
                                 tol=None,
                                 name=None):
              """Computes the   
            Creates a where condition .
            pythondot img2Lines of Code : 208dot img2License : Non-SPDX (Apache License 2.0)
            copy iconCopy
            def where_v2(condition, x=None, y=None, name=None):
              """Returns the indices of non-zero elements, or multiplexes `x` and `y`.
            
              This operation has two modes:
            
              1. **Return the indices of non-zero elements** - When only
                 `condition` is provided  
            Return the conjugate of x .
            pythondot img3Lines of Code : 53dot img3License : Non-SPDX (Apache License 2.0)
            copy iconCopy
            def conj(x, name=None):
              r"""Returns the complex conjugate of a complex number.
            
              Given a tensor `x` of complex numbers, this operation returns a tensor of
              complex numbers that are the complex conjugate of each element in `x`. The
              complex numbe  

            Community Discussions

            QUESTION

            Manage access to shared resource with Project Reactor
            Asked 2022-Feb-23 at 10:26

            How to manage access to shared resources using Project Reactor?

            Given an imaginary critical component that can execute only operation at the time (file store, expensive remote service, etc), how could one orchestrate in reactive manner access to this component if there are multiple points of access to this component (multiple API methods, subscribers...)? If the resource is free to execute the operation it should execute it right away, if some other operation is already in progress, add my operation to the queue and complete my Mono once my operation is completed.

            My idea is to add tasks to the flux queue which executes tasks one by one and return a Mono which will be complete once the task in the queue is completed, without blocking.

            ...

            ANSWER

            Answered 2022-Feb-23 at 10:26

            this looks like a simplified version of what the reactor-pool does, in essence. have you considered using that with eg. a maximum size of 1?

            https://github.com/reactor/reactor-pool/

            https://projectreactor.io/docs/pool/0.2.7/api/reactor/pool/Pool.html

            The pool is probably overkill, because it has the overhead of having to deal with multiple resources on top of multiple competing borrowers like in your case, but maybe it could provide some inspiration for you to go further.

            Source https://stackoverflow.com/questions/70529490

            QUESTION

            How can I shift all of the tables down after removing a table?
            Asked 2021-Dec-18 at 08:43

            In this code:

            ...

            ANSWER

            Answered 2021-Dec-17 at 22:15

            As stated in this answer, by creating a new table using the result of table.unpack:

            Source https://stackoverflow.com/questions/70399317

            QUESTION

            How to find peaks of FFT graph using Python?
            Asked 2021-Nov-29 at 18:16

            I am using Python to perform a Fast Fourier Transform on some data. I then need to extract the locations of the peaks in the transform in the form of the x-values. Right now I am using Scipy's fft tool to perform the transform, which seems to be working. However, when i use Scipy's find_peaks I only get the y-values, not the x-position that I need. I also get the warning:

            ...

            ANSWER

            Answered 2021-Nov-29 at 18:16

            There seem to be two points of confusion here:

            1. What find_peaks is returning.
            2. How to interpret complex values that the FFT is returning.

            I will answer them separately.

            Point #1

            find_peaks returns the indices in "a" that correspond to peaks, so I believe they ARE values you seek, however you must plot them differently. You can see the first example from the documentation here. But basically "peaks" is the index, or x value, and a[peaks] will be the y value. So to plot all your frequencies, and mark the peaks you could do:

            Source https://stackoverflow.com/questions/69888603

            QUESTION

            Matplotlib Scatter Plot Returns Different Plots in Different Versions
            Asked 2021-Oct-28 at 14:21

            I'm working on a generative art generator library for python called samila based on matplotlib scatter plot. It gets two functions and maps a square space into a arbitrary shape. We want the generated shape to be the same for given functions and given random seed in order to be reproducible.

            Recently we were working on functions with complex values and notified that scatter plot output is not the same in different versions on matplotlib.

            I wanted to know why is it like this and what's the problem with matplotlib. If this is a bug it could be horrible for matplotlib to plot different figures for a specific code in its different versions.

            So if you run bellow code using matplotlib==3.4.3:

            ...

            ANSWER

            Answered 2021-Oct-28 at 14:21

            The problem was that matplotlib changes its plotting strategy from 3.0.3 which ignores points with negative radius to 3.4.3 in which they're plotted.

            I couldn't find this using compare release notes and it was so confusing for me. Hope there will be an warning for this situation avoiding future issues.

            I tested bellow code which is way simpler:

            Source https://stackoverflow.com/questions/69718875

            QUESTION

            reinterpreting array of doubles as array of std::complex
            Asked 2021-Oct-16 at 15:27

            While C++11 standard says this about reinterpreting std::complex as doubles:

            For any pointer to an element of an array of complex named p and any valid array index i, reinterpret_cast(p)[2*i] is the real part of the complex number p[i], and reinterpret_cast(p)[2*i + 1] is the imaginary part of the complex number p[i]

            The intent of this requirement is to preserve binary compatibility between the C++ library complex number types and the C language complex number types (and arrays thereof), which have an identical object representation requirement.

            Is it true for the backward reinterpreting? I mean is it safe to perform something like this: std::complex *cppComplexArray = reinterpret_cast *>(cDoublesArray) where cDoublesArray have a type of double * and even length 2 * n? What are potential pitfalls if its length will be odd (2 * n + 1)?

            ...

            ANSWER

            Answered 2021-Oct-16 at 15:27

            In practice the backward reinterpreting will probably work most of the time, in view of the strong constraints of the forward reinterpreting impose (see on cppreference, std::complex, implementation notes).

            However, I'm not totally sure that such backward reinterpreting would in always work in theory:

            • Let's imagine an absurd and hypothetical implementation of a complex library that would maintain a list of addresses of active complex objects (e.g. for debugging purpose). This (probably static) list would be maintained by the complex constructor and destructor.
            • Every complex operation in this library would verify if its operands are in the list.
            • While forward reinterpreting would work (the complex objects were well constructed and its parts can be used as doubles), the backward reinterpretation would not work (e.g. despite a compatible layout, you would reinterpret as complex a pair of doubles and if you'd perform any complex operation on them, it would fail since the complex was not properly constructed, i.e. its address is not in the list).

            As said, this complex library would probably be a stupid idea. But such a library could be implemented and compliant with the standard specs. This is sufficient to prove that there is no reverse guarantee in theory.

            The last point of your question is easier and more obvious to answer, supposing we would have an implementation where the reverse reinterpretation works. The missing last column would lead to an access of a part that is out of bounds. This would therfore lead to UB.

            Additional readings: This working paper of the standard committee requests a general convertability feature that would generalize the bahavior of reinterpret_cast on complex for other types. It explains the complex case in section 4 and the special handling required from the compiler to make it work if complex is not itself implemented by an array.

            Source https://stackoverflow.com/questions/69591371

            QUESTION

            Python Matplotlib custom zoom function isn't working
            Asked 2021-Sep-06 at 19:10

            I'm making code for an interactive Mandelbrot set display, and I wanted the zoom function to update the image every time it is used. So I'm using Matplotlib event handling to create a custom zoom function.

            The zoom function that is already there will pixelate the image as you zoom in, because it zooms in on the same image. My zoom should update the image every time one drags the mouse.

            But it doesn't work. Every time I zoom once, the plot doesn't change shape, so the image itself stretches. Zoom again, and it just zooms there on the original picture. The ticks don't even change the entire time. Try it -- here's my code with a picture provided by Trenton McKinney:

            ...

            ANSWER

            Answered 2021-Sep-06 at 19:10

            I edited your display_data function as below:

            Source https://stackoverflow.com/questions/68733904

            QUESTION

            Substitution into differential equations in Maxima
            Asked 2021-Aug-08 at 14:02

            let's say I have several differential equations in the following form

            where the variables in the pointed brackets are complex numbers for example

            My question is whether it is possible in the Maxima to write down at first the set of the differential equations in the form mentioned above without evaluation the derivatives, then make the substitutions for the variables in the pointed brackets and after that evaluate the derivatives and separate the real and imaginary parts.

            ...

            ANSWER

            Answered 2021-Aug-08 at 14:02

            You can consider this example (it illustrates what Robert Dodier wrote in comments).

            Source https://stackoverflow.com/questions/68517736

            QUESTION

            How to use AND with ANY in NSPredicates while staying efficient
            Asked 2021-Jul-11 at 12:05

            Imagine I have a collection of books in Core Data. Each book can have multiple authors. Here's what this imaginary collection of books could look like (it only has one book, just to simplify things):

            ...

            ANSWER

            Answered 2021-Jul-11 at 12:05

            The following is an alternative approach, which does not use SUBQUERY, but should ultimately have the same results. I've no idea whether this would in practice be more or less efficient than using SUBQUERY.

            Your specific concern is the inefficiency of counting all the matching Authors, rather than just stopping when the first matching Author is found. Bear in mind that there is a lot going on behind the scenes whenever a fetch request is processed. First, CoreData has to parse your predicate and turn it into an equivalent SQLite query, which will look something like this:

            Source https://stackoverflow.com/questions/68319607

            QUESTION

            How can I get "top x% this y" from a user profile page using the StackExchange API?
            Asked 2021-Jul-09 at 09:45

            Using the StackExchange API, it's possible to find out quite a bit about a user:

            ...

            ANSWER

            Answered 2021-Jul-09 at 09:45

            Neither the SE API nor SEDE provide such field. Instead, you can

            Source https://stackoverflow.com/questions/68309023

            QUESTION

            Find lowest real value in complex vector
            Asked 2021-Jun-14 at 16:19

            How can I find the smallest positive real number in a complex vector of size N by 1 in Eigen3? For example, in this case I'd like to find the value 3.64038.

            ...

            ANSWER

            Answered 2021-Jun-14 at 14:40

            One option is to create a logical array and then call Eigen::select on it. Inspired by https://forum.kde.org/viewtopic.php?f=74&t=91378

            In this case:

            Source https://stackoverflow.com/questions/67969172

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

            Vulnerabilities

            No vulnerabilities reported

            Install imaginary

            Also, be sure you have the latest version of bimg:.

            Support

            ResizeEnlargeCropSmartCrop (based on libvips built-in algorithm)Rotate (with auto-rotate based on EXIF orientation)AutoRotate with further image transformations (based on EXIF metadata orientation)Flip (with auto-flip based on EXIF metadata)FlopZoomThumbnailFitPipeline of multiple independent image transformations in a single HTTP request.Configurable image area extractionEmbed/Extend image, supporting multiple modes (white, black, mirror, copy or custom background color)Watermark (customizable by text)Watermark imageCustom output color space (RGB, black/white...)Format conversion (with additional quality/compression settings)Info (image size, format, orientation, alpha...)Reply with default or custom placeholder image in case of error.Blur
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