# \#legal **URL:** https://forum.opencv.org/tag/legal/231.md [Latest](https://forum.opencv.org/latest.md) · [Categories](https://forum.opencv.org/categories.md) · [Tags](https://forum.opencv.org/tags.md) --- ## [EU AI Act compliance](https://forum.opencv.org/t/eu-ai-act-compliance/24607)
**Author:** [@Namrata\_Raina](https://forum.opencv.org/u/Namrata_Raina)\ **Replies:** 2\ **Last updated:** [July 10, 2026, 4:49am UTC](https://forum.opencv.org/t/eu-ai-act-compliance/24607 "2026-07-10T04:49:46Z")
@philnelson Does OpenCV 4.5.3 and OpenCV 4.13.0 comply with the EU AI Act? --- ## [Training data / provenance of the res10 SSD face detector](https://forum.opencv.org/t/training-data-provenance-of-the-res10-ssd-face-detector/24612)
**Author:** [@ritesh\_kumar](https://forum.opencv.org/u/ritesh_kumar)\ **Replies:** 0\ **Last updated:** [July 10, 2026, 3:58am UTC](https://forum.opencv.org/t/training-data-provenance-of-the-res10-ssd-face-detector/24612 "2026-07-10T03:58:14Z")
Hi all, We use OpenCV 4.5.3 (DNN module) with the bundled ResNet-10 SSD face detector — res10\_300x300\_ssd\_iter\_140000\_fp16.caffemodel + deploy.prototxt from samples/dnn/face\_detector. We run it for inference only (no tr… --- ## [A look at OpenCV's licensing](https://forum.opencv.org/t/a-look-at-opencvs-licensing/21096)
**Author:** [@Donatello\_Donini](https://forum.opencv.org/u/Donatello_Donini)\ **Replies:** 1\ **Last updated:** [May 26, 2025, 6:17pm UTC](https://forum.opencv.org/t/a-look-at-opencvs-licensing/21096 "2025-05-26T18:17:55Z")
I heard that OpenCV has a series of patented features (like the SIFT algorithm). I need to know which are the features that as of today (May 26, 2025) are patented. --- ## [Payment for Academic and Commercial Use of the SIFT Algorithm](https://forum.opencv.org/t/payment-for-academic-and-commercial-use-of-the-sift-algorithm/20284)
**Author:** [@yukky](https://forum.opencv.org/u/yukky)\ **Replies:** 3\ **Last updated:** [February 20, 2025, 4:13pm UTC](https://forum.opencv.org/t/payment-for-academic-and-commercial-use-of-the-sift-algorithm/20284 "2025-02-20T16:13:45Z")
I started image processing with OpenCV as a hobby. Now that the SIFT patent has expired (source: US6711293B1 - Method and apparatus for identifying scale invariant features in an image and use of same for locating an ob… --- ## [Possible scam opencv course](https://forum.opencv.org/t/possible-scam-opencv-course/19504)
**Author:** [@Miguel\_Ferrer\_Ferran](https://forum.opencv.org/u/Miguel_Ferrer_Ferran)\ **Replies:** 1\ **Last updated:** [December 12, 2024, 3:44pm UTC](https://forum.opencv.org/t/possible-scam-opencv-course/19504 "2024-12-12T15:44:48Z")
Could you tell me if this email is real or fake, i have search for Akeef ur Rehaman but i have not found any reference of him. Miguel Ferrer Payment link 1 mensaje Akeef Rehaman akeef@opencv.org 12 de diciembre de … --- ## [Which IPPICV OSS is used in opencv-python?](https://forum.opencv.org/t/which-ippicv-oss-is-used-in-opencv-python/18299)
**Author:** [@gigadelic](https://forum.opencv.org/u/gigadelic)\ **Replies:** 7\ **Last updated:** [August 5, 2024, 5:24am UTC](https://forum.opencv.org/t/which-ippicv-oss-is-used-in-opencv-python/18299 "2024-08-05T05:24:14Z")
Hello. Intel(R) IPP ICV library statically is included in opencv-python’s third-party OSS. IPPICV includes about 50 OSS as shown in the link below, but which OSS is used by opencv-python? https://www.intel.com/content… --- ## [Want to add opencvandroid sdk version 4.8.0 to client project](https://forum.opencv.org/t/want-to-add-opencvandroid-sdk-version-4-8-0-to-client-project/17870)
**Author:** [@achillesdodge](https://forum.opencv.org/u/achillesdodge)\ **Replies:** 5\ **Last updated:** [June 10, 2024, 7:32am UTC](https://forum.opencv.org/t/want-to-add-opencvandroid-sdk-version-4-8-0-to-client-project/17870 "2024-06-10T07:32:46Z")
Even though the Android sdk itself comes with apache v2.0 license, on the website at the terms & conditions - Terms and Conditions - OpenCV under License for use of products it says All Products available for sale on … --- ## [Is it allowded to use SURF for commercial use?](https://forum.opencv.org/t/is-it-allowded-to-use-surf-for-commercial-use/16731)
**Author:** [@vps](https://forum.opencv.org/u/vps)\ **Replies:** 0\ **Last updated:** [March 7, 2024, 8:18am UTC](https://forum.opencv.org/t/is-it-allowded-to-use-surf-for-commercial-use/16731 "2024-03-07T08:18:40Z")
Hi All, I am using opencv 4.9 library. I want to use surf algorithm for feature extraction. Is it possible to use it for commerical use. --- ## [Can I use cuda surf for commercial from opencv 4.5 and higher? If not, how can I use cuda surf for commercial?](https://forum.opencv.org/t/can-i-use-cuda-surf-for-commercial-from-opencv-4-5-and-higher-if-not-how-can-i-use-cuda-surf-for-commercial/16540)
**Author:** [@Tr\_n\_Sang](https://forum.opencv.org/u/Tr_n_Sang)\ **Replies:** 0\ **Last updated:** [February 22, 2024, 7:38am UTC](https://forum.opencv.org/t/can-i-use-cuda-surf-for-commercial-from-opencv-4-5-and-higher-if-not-how-can-i-use-cuda-surf-for-commercial/16540 "2024-02-22T07:38:58Z")
Please help me answer this question. --- ## [Ippicv in openCV and AGPL](https://forum.opencv.org/t/ippicv-in-opencv-and-agpl/16519)
**Author:** [@devman](https://forum.opencv.org/u/devman)\ **Replies:** 3\ **Last updated:** [February 21, 2024, 12:23pm UTC](https://forum.opencv.org/t/ippicv-in-opencv-and-agpl/16519 "2024-02-21T12:23:57Z")
Among 3rd-party in openCV, there is ippicv which is not open source sw. When AGPL 3.0 Project uses openCV, can this project use ippicv without any conflict? Or should I disclose the source code of ippicv? If I cannot… --- ## [Is OpenCV official Android release free to use in commercial usage?](https://forum.opencv.org/t/is-opencv-official-android-release-free-to-use-in-commercial-usage/16522)
**Author:** [@Chester](https://forum.opencv.org/u/Chester)\ **Replies:** 3\ **Last updated:** [February 21, 2024, 10:24am UTC](https://forum.opencv.org/t/is-opencv-official-android-release-free-to-use-in-commercial-usage/16522 "2024-02-21T10:24:13Z")
As title, I download the OpenCV Android release 4.8 ZIP file from official website. My worry is that whether it’s safe to use it commercial usage? My guess is that it should not contain any other 3rd party patent inside… --- ## [Is SURF for CUDA is free](https://forum.opencv.org/t/is-surf-for-cuda-is-free/3985)
**Author:** [@Christophe\_Jacquelin](https://forum.opencv.org/u/Christophe_Jacquelin)\ **Replies:** 2\ **Last updated:** [July 5, 2023, 3:58pm UTC](https://forum.opencv.org/t/is-surf-for-cuda-is-free/3985 "2023-07-05T15:58:09Z")
Hello, Is Surf for CUDA is free, The patent is over but we have to set the Flag NON FREE in Cmake ? SURF or ORB what is the best one ? Thanks; --- ## [openCV dll redistribution](https://forum.opencv.org/t/opencv-dll-redistribution/12208)
**Author:** [@Sylvain\_Ard](https://forum.opencv.org/u/Sylvain_Ard)\ **Replies:** 2\ **Last updated:** [March 13, 2023, 10:57am UTC](https://forum.opencv.org/t/opencv-dll-redistribution/12208 "2023-03-13T10:57:59Z")
Hello, the installer of my program redistributes OpenCV dlls, have I to add the OpenCV Apache2 license to my installer ? Thank you Best regards --- ## [Watchdog code - What to do next](https://forum.opencv.org/t/watchdog-code-what-to-do-next/9512)
**Author:** [@Alper\_Inugur](https://forum.opencv.org/u/Alper_Inugur)\ **Replies:** 7\ **Last updated:** [July 15, 2022, 6:05pm UTC](https://forum.opencv.org/t/watchdog-code-what-to-do-next/9512 "2022-07-15T18:05:39Z")
Hi, I have made a simple code using OpenCV. Basically after detecting faces, it writes the output with a timestamp, in given intervals. It also can send e-mail, so that it can work as a watchdog for your computer intr… --- ## [Copyright on images of documentation?](https://forum.opencv.org/t/copyright-on-images-of-documentation/9164)
**Author:** [@Merkaber](https://forum.opencv.org/u/Merkaber)\ **Replies:** 2\ **Last updated:** [June 14, 2022, 10:31am UTC](https://forum.opencv.org/t/copyright-on-images-of-documentation/9164 "2022-06-14T10:31:30Z")
Am I allowed to use images from the documentation in my bachelor thesis? This one: from this site: https://docs.opencv.org/3.4/d1/d73/tutorial\_introduction\_to\_svm.html a… --- ## [Surface\_matching module commercial use](https://forum.opencv.org/t/surface-matching-module-commercial-use/8601)
**Author:** [@magres](https://forum.opencv.org/u/magres)\ **Replies:** 0\ **Last updated:** [May 1, 2022, 8:08am UTC](https://forum.opencv.org/t/surface-matching-module-commercial-use/8601 "2022-05-01T08:08:21Z")
Does that module permit commercial use? there’s a PATENTS.txt file, but OPENCV\_ENABLE\_NONFREE is not mentioned in the module sources. If not, how to use it commercial? --- ## [Creating a program release that does not require opencv\_world454.dll](https://forum.opencv.org/t/creating-a-program-release-that-does-not-require-opencv-world454-dll/6973)
**Author:** [@tumanovalex](https://forum.opencv.org/u/tumanovalex)\ **Replies:** 4\ **Last updated:** [January 4, 2022, 4:40pm UTC](https://forum.opencv.org/t/creating-a-program-release-that-does-not-require-opencv-world454-dll/6973 "2022-01-04T16:40:40Z")
Windows 10, Visual Studio 2019. I would like to make it so that the release of the program can run without opencv\_world454.dll, located next to the exe file. Is this possible? If it is a date, please tell me how to do i… --- ## [If we sell a product with OpenCV and it’s dependencies, do we need to make our code GPL?](https://forum.opencv.org/t/if-we-sell-a-product-with-opencv-and-it-s-dependencies-do-we-need-to-make-our-code-gpl/6206)
**Author:** [@Max\_Zheng](https://forum.opencv.org/u/Max_Zheng)\ **Replies:** 3\ **Last updated:** [November 21, 2021, 7:36pm UTC](https://forum.opencv.org/t/if-we-sell-a-product-with-opencv-and-it-s-dependencies-do-we-need-to-make-our-code-gpl/6206 "2021-11-21T19:36:04Z")
Hi! This question is not related to programming. I can’t get any clear answer from anywhere else so I’m trying my luck here. I’m trying to figure out if we can sell a hardware product with OpenCV and it’s dependencies p… --- ## [Misleading licensing comment in build/opencv\_modules.hpp](https://forum.opencv.org/t/misleading-licensing-comment-in-build-opencv-modules-hpp/5871)
**Author:** [@dnns](https://forum.opencv.org/u/dnns)\ **Replies:** 1\ **Last updated:** [October 27, 2021, 6:47am UTC](https://forum.opencv.org/t/misleading-licensing-comment-in-build-opencv-modules-hpp/5871 "2021-10-27T06:47:52Z")
Dear Community, when building from source, the generated file in “build/opencv2/opencv\_modules.hpp” says: /\* \* \*\* File generated automatically, do not modify \*\* \* \* This file defines the list of modules availab… --- ## [OpenCV - Commercial Use - Display third party Source Info](https://forum.opencv.org/t/opencv-commercial-use-display-third-party-source-info/5818)
**Author:** [@PaulCreaser](https://forum.opencv.org/u/PaulCreaser)\ **Replies:** 3\ **Last updated:** [October 24, 2021, 6:47am UTC](https://forum.opencv.org/t/opencv-commercial-use-display-third-party-source-info/5818 "2021-10-24T06:47:03Z")
1. OS WIndows10, etc 2. OS Architecture e.g. x86\_64 We are planning to release a commercial product based on OpenCV.. Our customer would like to provide a read me page, with info concerning the third party open source l… --- ## [OpenCV static linking on a commercial product](https://forum.opencv.org/t/opencv-static-linking-on-a-commercial-product/5425)
**Author:** [@marcoventurini](https://forum.opencv.org/u/marcoventurini)\ **Replies:** 2\ **Last updated:** [September 30, 2021, 2:53pm UTC](https://forum.opencv.org/t/opencv-static-linking-on-a-commercial-product/5425 "2021-09-30T14:53:19Z")
Hello, my company is about to design a commercial closed source software product that will be based, at least partially, on the OpenCV library. My legal background is far from being solid, but per my understanding of t… --- ## [Does opencv-contrib-python have any usage restrictions?](https://forum.opencv.org/t/does-opencv-contrib-python-have-any-usage-restrictions/1702)
**Author:** [@dnp407](https://forum.opencv.org/u/dnp407)\ **Replies:** 1\ **Last updated:** [August 27, 2021, 10:22am UTC](https://forum.opencv.org/t/does-opencv-contrib-python-have-any-usage-restrictions/1702 "2021-08-27T10:22:35Z")
I want to make use of opencv-contrib-python modules and to be specific, extended image processing (ximgproc). Is it free to use? --- ## [License of 3rd-party dnn model](https://forum.opencv.org/t/license-of-3rd-party-dnn-model/4300)
**Author:** [@phako](https://forum.opencv.org/u/phako)\ **Replies:** 3\ **Last updated:** [July 12, 2021, 3:19pm UTC](https://forum.opencv.org/t/license-of-3rd-party-dnn-model/4300 "2021-07-12T15:19:42Z")
Hello, coming from the less-than-helping ticket at \[Q\] license of files in 3rdparty repo · Issue #19290 · opencv/opencv · GitHub Does this statement (Is the face detector open source) also hold for things in your openc… --- ## [Is the face detector open source](https://forum.opencv.org/t/is-the-face-detector-open-source/3982)
**Author:** [@Philip\_der\_Pole](https://forum.opencv.org/u/Philip_der_Pole)\ **Replies:** 2\ **Last updated:** [July 12, 2021, 12:41pm UTC](https://forum.opencv.org/t/is-the-face-detector-open-source/3982 "2021-07-12T12:41:28Z")
Hello, I would love to use the OpenCV DNN face detector for a commercial solution, and would love to know whether the model itself and the dataset is open source! --- ## [Can i use Cascade Classifier commercially?](https://forum.opencv.org/t/can-i-use-cascade-classifier-commercially/3454)
**Author:** [@Marcs](https://forum.opencv.org/u/Marcs)\ **Replies:** 1\ **Last updated:** [May 21, 2021, 6:17am UTC](https://forum.opencv.org/t/can-i-use-cascade-classifier-commercially/3454 "2021-05-21T06:17:58Z")
Hi, I’m lost between licenses, I’ve read a lot about it, but I’m still confused. Sorry, I don’t know if this is the right place for these questions. Can I use .xml files, such as “haarcascade\_eye.xml”, in a commercial p… --- ## [iOS App and OpenCV License (Legal)](https://forum.opencv.org/t/ios-app-and-opencv-license-legal/3303)
**Author:** [@frapl](https://forum.opencv.org/u/frapl)\ **Replies:** 3\ **Last updated:** [May 12, 2021, 6:05pm UTC](https://forum.opencv.org/t/ios-app-and-opencv-license-legal/3303 "2021-05-12T18:05:03Z")
Hello, I have built a commercial iOS app using OpenCV. However I could not understand if I have to include the license in the app or not. Is it enough if I include the license in my code or do I have to make some sort … --- ## [Opencv-contrib is free or not?](https://forum.opencv.org/t/opencv-contrib-is-free-or-not/1618)
**Author:** [@rap](https://forum.opencv.org/u/rap)\ **Replies:** 9\ **Last updated:** [March 25, 2021, 1:45pm UTC](https://forum.opencv.org/t/opencv-contrib-is-free-or-not/1618 "2021-03-25T13:45:55Z")
Hi, I want to know if opencv-contrib is free to use ? because I want to use the tracking library. Thank you --- ## [License or Copyright on Documentation Images](https://forum.opencv.org/t/license-or-copyright-on-documentation-images/606)
**Author:** [@cadop](https://forum.opencv.org/u/cadop)\ **Replies:** 7\ **Last updated:** [January 5, 2021, 8:34am UTC](https://forum.opencv.org/t/license-or-copyright-on-documentation-images/606 "2021-01-05T08:34:56Z")
What is the copyright on the images in the opencv documentation? For example there are some images in the documentation for pose estimation OpenCV: Pose Estimation but I do not see anything on the website stating this as…