lookup | Pure Go implementation of fast image search | Computer Vision library

 by   deluan Go Version: Current License: MIT

kandi X-RAY | lookup Summary

kandi X-RAY | lookup Summary

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

It is a nice, simple and fast library which helps you to lookup objects on a screen. It also includes OCR functionality. Using Lookup you can do OCR tricks like recognizing any information in your Robot application. Which can be useful for debugging or automating things. This library is a port of the Java Lookup library to GoLang. Details of NCC (Normalized Cross Correlation), used by this library, can be found in the original library's 'docs' folder (a lot of math).

            kandi-support Support

              lookup has a low active ecosystem.
              It has 22 star(s) with 2 fork(s). There are 3 watchers for this library.
              It had no major release in the last 6 months.
              There are 0 open issues and 1 have been closed. On average issues are closed in 72 days. There are 1 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of lookup is current.

            kandi-Quality Quality

              lookup has 0 bugs and 0 code smells.

            kandi-Security Security

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

            kandi-License License

              lookup 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

              lookup 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.

            Top functions reviewed by kandi - BETA

            kandi has reviewed lookup and discovered the below as its top functions. This is intended to give you an instant insight into lookup implemented functionality, and help decide if they suit your requirements.
            • createIntegralImage creates an integral image from an image .
            • newImageBinaryChannels returns a slice of imageBinaryChannel objects .
            • loadSymbol loads a font symbol
            • LoadFont loads a font
            • ensureGrayScale ensures the image s size is a scaled scale .
            • lookup returns the GPoint corresponding to the given image .
            • loadFont loads a font symbol at the specified path .
            • lookupAll returns all images in imageBin
            • newImageBinary creates a new binary representation of an image .
            • numnumator computes the sum of an image
            Get all kandi verified functions for this library.

            lookup Key Features

            No Key Features are available at this moment for lookup.

            lookup Examples and Code Snippets

            No Code Snippets are available at this moment for lookup.

            Community Discussions


            Is there a concept in the standard library that tests for usability in ranged for loops
            Asked 2022-Apr-14 at 09:51

            There are a number of different ways, that make a type/class usable in a ranged for loop. An overview is for example given on cppreference:

            range-expression is evaluated to determine the sequence or range to iterate. Each element of the sequence, in turn, is dereferenced and is used to initialize the variable with the type and name given in range-declaration.

            begin_expr and end_expr are defined as follows:

            • If range-expression is an expression of array type, then begin_expr is __range and end_expr is (__range + __bound), where __bound is the number of elements in the array (if the array has unknown size or is of an incomplete type, the program is ill-formed)
            • If range-expression is an expression of a class type C that has both a member named begin and a member named end (regardless of the type or accessibility of such member), then begin_expr is __range.begin() and end_expr is __range.end()
            • Otherwise, begin_expr is begin(__range) and end_expr is end(__range), which are found via argument-dependent lookup (non-ADL lookup is not performed).

            If I want to use a ranged for loop say in a function template, I want to constrain the type to be usable in a ranged for loop, to trigger a compiler error with a nice "constraint not satisfied" message. Consider the following example:



            Answered 2022-Apr-14 at 09:51

            It seems like what you need is std::ranges::range which requires the expressions ranges::begin(t) and ranges::end(t) to be well-formed.

            Where ranges::begin is defined in [range.access.begin]:

            The name ranges​::​begin denotes a customization point object. Given a subexpression E with type T, let t be an lvalue that denotes the reified object for E. Then:

            • If E is an rvalue and enable_­borrowed_­range> is false, ranges​::​begin(E) is ill-formed.

            • Otherwise, if T is an array type and remove_­all_­extents_­t is an incomplete type, ranges​::​begin(E) is ill-formed with no diagnostic required.

            • Otherwise, if T is an array type, ranges​::​begin(E) is expression-equivalent to t + 0.

            • Otherwise, if auto(t.begin()) is a valid expression whose type models input_­or_­output_­iterator, ranges​::​begin(E) is expression-equivalent to auto(t.begin()).

            • Otherwise, if T is a class or enumeration type and auto(begin(t)) is a valid expression whose type models input_­or_­output_­iterator with overload resolution performed in a context in which unqualified lookup for begin finds only the declarations

            Source https://stackoverflow.com/questions/71868477


            Spring Cloud Gateway; Spring MVC found on classpath, which is incompatible with Spring Cloud Gateway Issue
            Asked 2022-Mar-16 at 07:16

            I got this below error when run the API-GATEWAY, I tried so many ways but I couldn't solve this issue.


            Spring MVC found on classpath, which is incompatible with Spring Cloud Gateway.


            Please set spring.main.web-application-type=reactive or remove spring-boot-starter-web dependency.

            Main Class



            Answered 2021-Aug-01 at 06:17

            Please note that Spring Cloud Gateway is not compatible with Spring MVC (spring-boot-starter-web). This is outlined in section "How to include Spring Cloud Gateway in the official reference documentation":

            Spring Cloud Gateway is built on Spring Boot 2.x, Spring WebFlux, and Project Reactor. As a consequence, many of the familiar synchronous libraries (Spring Data and Spring Security, for example) and patterns you know may not apply when you use Spring Cloud Gateway.

            Additionally, it is stated that:

            Spring Cloud Gateway requires the Netty runtime provided by Spring Boot and Spring Webflux. It does not work in a traditional Servlet Container or when built as a WAR.

            As already suggested by the error message, you would need to remove the dependency on spring-boot-starter-web. You can list all your direct and transitive dependencies with the following command:

            Source https://stackoverflow.com/questions/68587832


            Unqualified lookup of operators in standard library templates
            Asked 2022-Mar-05 at 16:30
            namespace N {
                struct A {};
                constexpr bool operator<(const T&, const T&) { return true; }
            constexpr bool operator<(const N::A&, const N::A&) { return false; }
            int main() {
                static_assert(std::less{}({}, {}), "assertion failed");


            Answered 2022-Mar-05 at 16:30

            What matters here is whether the unqualified lookup from inside std finds any other operator< (regardless of its signature!) before reaching the global namespace. That depends on what headers have been included (any standard library header may include any other), and it also depends on the language version since C++20 replaced many such operators with operator<=>. Also, occasionally such things are respecified as hidden friends that are not found by unqualified lookup. It’s obviously unwise to rely on it in any case.

            Source https://stackoverflow.com/questions/71363361


            Why does the type signature of linear array change compared to normal array?
            Asked 2022-Feb-28 at 10:13

            I'm going through an example in A Taste of Linear Logic.

            It first introduces the standard array with the usual operations defined (page 24):

            Then suggests that a linear equivalent (using a linear logic for type signatures to restrict array copying) would have a slightly different type signature:

            This is designed with the idea that array contains values that are cheap to copy but that the array itself is expensive to copy and thus should be passed along from use to use as a handle.

            Question: The signatures for lookup and update correspond well to the standard signatures, but how do I interpret the signature for new?

            In particular:

            • The function new does not seem to return an array. How can I get an array to use if one is not provided?
            • I think I do understand that Arr –o Arr x X is not derivable using linear logic and therefore a function to extract individual values without consuming the array is needed, but I don't understand why new doesn't provide that function directly


            Answered 2022-Feb-28 at 10:13

            In practical terms, this is about garbage collection.

            Linear logic avoids making copies as well as leaving unused values lying around. So when you create an array with new, you also need to make sure it's eventually cleaned up again.

            How can you make sure it is cleaned up? Well, in this example they do it by not giving back the array as the result, but instead “lending” it to the caller. The function ArrArrX must give an array back in the end, in addition to the result you're actually interested in. It's assumed that this will be a modified form of the array you started out with. Only the X is passed back to the caller, the Arr is deallocated.

            Source https://stackoverflow.com/questions/71292714


            Lambda expressions and anonymous classes don't work when loaded as hidden classes
            Asked 2022-Feb-26 at 05:14

            I am trying to compile and load dynamically generated Java code during runtime. Since both ClassLoader::defineClass and Unsafe::defineAnonymousClass have serious drawbacks in this scenario, I tried using hidden classes via Lookup::defineHiddenClass instead. This works fine for all classes that I tried to load, except for those that call lambda expressions or contain anonymous classes.

            Calling a lambda expression throws the following exception:



            Answered 2022-Feb-23 at 18:19

            You can not turn arbitrary classes into hidden classes.

            The documentation of defineHiddenClass contains the sentence

            • On any attempt to resolve the entry in the run-time constant pool indicated by this_class, the symbolic reference is considered to be resolved to C and resolution always succeeds immediately.

            What it doesn’t spell out explicitly is that this is the only place where a type resolution ever ends up at the hidden class.

            But it has been said unambiguously in bug report JDK-8222730:

            For a hidden class, its specified hidden name should only be accessible through the hidden class's 'this_class' constant pool entry.

            The class should not be accessible by specifying its original name in, for example, a method or field signature even within the hidden class.

            Which we can check. Even a simple case like

            Source https://stackoverflow.com/questions/71224833


            Lookup Values by Corresponding Column Header in Pandas 1.2.0 or newer
            Asked 2022-Feb-13 at 20:11

            The operation pandas.DataFrame.lookup is "Deprecated since version 1.2.0", and has since invalidated a lot of previous answers.

            This post attempts to function as a canonical resource for looking up corresponding row col pairs in pandas versions 1.2.0 and newer.

            Some previous answers to this type of question (now deprecated):

            1. Vectorized lookup on a pandas dataframe
            2. Python Pandas Match Vlookup columns based on header values
            3. Using DataFrame.lookup to get rows where columns names are a subset of a string
            4. Python: pandas: match row value to column name/ key's value

            Some Current Answers to this Question:

            1. Reference DataFrame value corresponding to column header
            2. Pandas/Python: How to create new column based on values from other columns and apply extra condition to this new column
            Standard LookUp Values With Default Range Index

            Given the following DataFrame:



            Answered 2021-Nov-18 at 21:34
            Standard LookUp Values With Any Index

            The documentation on Looking up values by index/column labels recommends using NumPy indexing via factorize and reindex as the replacement for the deprecated DataFrame.lookup.

            Source https://stackoverflow.com/questions/69352472


            Build error domain=com.apple.CoreSimulator.SimError, code=405
            Asked 2022-Feb-13 at 11:30

            I can build on my iOS 15 emulator with no problems, but when building on my iOS 15 Device connected to xcode 13. I get the error:

            error Failed to launch the app on simulator, An error was encountered processing the command (domain=com.apple.CoreSimulator.SimError, code=405): Unable to lookup in current state: Shutdown.

            Any ideas?




            Answered 2021-Sep-24 at 16:03

            do you run your code in an IDE? I faced the same problem today after updating XCode. If I run code in terminal I get other error: CompileSwiftSources normal x86_64 com.apple.xcode.tools.swift.compiler Try this

            Source https://stackoverflow.com/questions/69312343


            Log4j vulnerability - Is Log4j 1.2.17 vulnerable (was unable to find any JNDI code in source)?
            Asked 2022-Feb-01 at 15:47

            With regard to the Log4j JNDI remote code execution vulnerability that has been identified CVE-2021-44228 - (also see references) - I wondered if Log4j-v1.2 is also impacted, but the closest I got from source code review is the JMS-Appender.

            The question is, while the posts on the Internet indicate that Log4j 1.2 is also vulnerable, I am not able to find the relevant source code for it.

            Am I missing something that others have identified?

            Log4j 1.2 appears to have a vulnerability in the socket-server class, but my understanding is that it needs to be enabled in the first place for it to be applicable and hence is not a passive threat unlike the JNDI-lookup vulnerability which the one identified appears to be.

            Is my understanding - that Log4j v1.2 - is not vulnerable to the jndi-remote-code execution bug correct?


            This blog post from Cloudflare also indicates the same point as from AKX....that it was introduced from Log4j 2!

            Update #1 - A fork of the (now-retired) apache-log4j-1.2.x with patch fixes for few vulnerabilities identified in the older library is now available (from the original log4j author). The site is https://reload4j.qos.ch/. As of 21-Jan-2022 version has been released. Vulnerabilities addressed to date include those pertaining to JMSAppender, SocketServer and Chainsaw vulnerabilities. Note that I am simply relaying this information. Have not verified the fixes from my end. Please refer the link for additional details.



            Answered 2022-Jan-01 at 18:43

            The JNDI feature was added into Log4j 2.0-beta9.

            Log4j 1.x thus does not have the vulnerable code.

            Source https://stackoverflow.com/questions/70310980


            System.NotSupportedException: Character set 'utf8mb3' is not supported by .Net Framework
            Asked 2022-Jan-27 at 00:12

            I am trying to run a server with a MySQL Database, however I keep getting this huge error and I am not sure why.



            Answered 2021-Aug-11 at 14:38

            Maybe a solution. Source : https://dba.stackexchange.com/questions/8239/how-to-easily-convert-utf8-tables-to-utf8mb4-in-mysql-5-5

            Change your CHARACTER SET AND COLLATE to utf8mb4.

            For each database:

            Source https://stackoverflow.com/questions/68645324


            How to make a Spring Boot application quit on tomcat failure
            Asked 2022-Jan-15 at 09:55

            We have a bunch of microservices based on Spring Boot 2.5.4 also including spring-kafka:2.7.6 and spring-boot-actuator:2.5.4. All the services use Tomcat as servlet container and graceful shutdown enabled. These microservices are containerized using docker.
            Due to a misconfiguration, yesterday we faced a problem on one of these containers because it took a port already bound from another one.
            Log states:



            Answered 2021-Dec-17 at 08:38

            Since you have everything containerized, it's way simpler.

            Just set up a small healthcheck endpoint with Spring Web which serves to see if the server is still running, something like:

            Source https://stackoverflow.com/questions/70378200

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


            No vulnerabilities reported

            Install lookup

            You can download it from GitHub.


            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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