2019-10-28 08:44:14 -0600 | received badge | ● Famous Question (source) |
2019-08-20 03:17:54 -0600 | received badge | ● Notable Question (source) |
2018-11-28 09:53:13 -0600 | received badge | ● Nice Question (source) |
2018-11-28 09:53:02 -0600 | received badge | ● Nice Answer (source) |
2018-05-22 02:43:49 -0600 | received badge | ● Popular Question (source) |
2018-04-13 06:55:17 -0600 | received badge | ● Teacher (source) |
2017-10-20 08:21:23 -0600 | received badge | ● Notable Question (source) |
2017-08-02 06:55:42 -0600 | received badge | ● Nice Question (source) |
2017-06-27 05:12:44 -0600 | received badge | ● Popular Question (source) |
2017-04-28 05:14:32 -0600 | received badge | ● Famous Question (source) |
2016-09-28 03:43:12 -0600 | received badge | ● Notable Question (source) |
2016-04-15 00:33:28 -0600 | received badge | ● Popular Question (source) |
2015-09-24 21:13:32 -0600 | asked a question | Whats' the best way to speed up filtering a very large image by multi-processing? I'd like to perform Guassian filtering on a very large image (80,000 x 60,000) in memory using multiple cores. After some reading, I concluded that there are two possible route: 1) Using
If option 2 is better, then
|
2015-09-08 18:05:23 -0600 | asked a question | Is there function in OpenCV similar to ind2rgb in MATLAB ? I have a 16-bit indexed image that I'd like to convert to color image using my own lookup table. In MATLAB, this can be done with I'm wondering if there is any OpenCV function that does the same thing? I've only found |
2015-08-30 01:04:16 -0600 | received badge | ● Self-Learner (source) |
2015-08-29 22:01:38 -0600 | answered a question | Failure to import cv2 in python : DLL load failed. As it turned out, it's a rather silly mistake. Because I was still thinking it could be due to bad path variable setup, I tried using |
2015-08-28 14:50:15 -0600 | commented question | Failure to import cv2 in python : DLL load failed. Thanks! That's a very good suggestion ! |
2015-08-27 21:46:31 -0600 | asked a question | Failure to import cv2 in python : DLL load failed. Two weeks ago, I built openCV-3.0.0, using Visual Studio 2013 x64 on Windows 7, with Python 3.4.3. I've copied cv2.pyd into the Today, when I typed I couldn't remember everything I did to my computer in the past two weeks, but I did remember I installed openSSH for windows. When I checked my path variable, surprisingly, there is only one entry left for this software. Apparently this software erase previously existing path variable entries. While I suspect this could be the cause of the problem, I couldn't solve it. I added the path to opencv binaries, and Windows\System32, Windows\SysWow64 back but they didn't help. When I use dependency walker, I saw the same list of missing dlls as reported [here]. (http://stackoverflow.com/questions/17...), which, according to the original poster, was misleading. Then I'm wondering : 1) Is it indeed the path variable that gave me problem? If so, how can I restore it? 2) Could it be something other than path variable? How then can I troubleshoot? |
2015-08-27 20:38:11 -0600 | received badge | ● Enthusiast |
2015-08-19 04:09:52 -0600 | asked a question | Do I have to worry about borders when I resize a large image in blocks? Hi, If I first divide an image into 4 (2x2) blocks, resize them by 50% in each dimension separately and put them back together, will the image be different from an image directed resized from the original. I mean will I have to worry that borders between blocks will have some artifacts because they now lose neighbors during calculation? |
2015-08-15 16:05:41 -0600 | commented answer | How to build OpenCV 3.0.0 with libjpeg turbo? Thank you. I actually used turbojpeg-static.lib and I can build openCV successfully. Now I'm wondering, between jpeg-static.lib and turbojpeg-static.lib, which one should I use? |
2015-08-15 12:10:27 -0600 | received badge | ● Editor (source) |
2015-08-15 11:59:24 -0600 | received badge | ● Organizer (source) |
2015-08-15 11:58:49 -0600 | asked a question | How to build OpenCV 3.0.0 with libjpeg turbo? Hi, I'm trying to build OpenCV 3.0.0 with libjpeg turbo 1.4.1. The only relevant information I can find is a post from Stack Overflow : http://stackoverflow.com/questions/10... I try to follow this and did the following in cmake-gui: 1) uncheck : BUILD_JPEG, 2) add entry(PATH) : JPEG_INCLUDE_DIR=C:/libjepeg-turbo64/include/, 3) add entry(STRING) : JPEG_LIBRARY=C:/libjpeg-turbo64/lib/libjpeg.a C:/OpenCV-3.0.0 When I hit generate in cmakge-gui, the log reads : "Found JPEG: C:/libjpeg-turbo64/lib/libjpeg.a C:/opencv-3.0.0_turbo" But when I build the solution in openCV, a great majority of the projects failed, showing fatal link error. I have two questions here: 1) What does "JPEG_LIBRARY=C:/libjpeg-turbo64/lib/libjpeg.a C:/OpenCV-3.0.0" really mean? I just copy the line and make some changes that I understand but it doesn't quite make sense to me. I can't find any file named libjpeg in the lib folder, but there is a jpeg.lib. 2) What should I do if I want to build OpenCV 3.0.0 with libjpeg-turbo? Thanks |
2015-08-14 12:31:19 -0600 | received badge | ● Supporter (source) |
2015-08-14 11:56:47 -0600 | commented answer | How to resize an extremely large image After I commented out the line and rebuilt openCV, it did solve my problem. and Yes, I have followed LBerger's suggestion and reported a ticket. |
2015-08-14 03:48:20 -0600 | commented answer | How to resize an extremely large image That sounds like a solution to me. I know exactly what I need to resize so I think I can probably just comment this out. I'll see if this will work. Thanks ! |
2015-08-14 03:45:42 -0600 | received badge | ● Scholar (source) |
2015-08-14 02:04:51 -0600 | received badge | ● Student (source) |
2015-08-13 16:42:30 -0600 | asked a question | How to resize an extremely large image Hi, I'm using Python 3.4.3 and OpenCV 3.0.0. While I'm trying to resize a very large RGB image (107162,79553,3) using the following code: I got the error message "cv2.error: C:\opencv-3.0.0\source\modules\imgproc\src\imgwarp.cpp:3208: error: (-215) ssize.area() > 0 in function cv::resize" I did some further testing and realized this is an integer overflow problem because the code would work on image of the size (46340,46340,3) but not (46341,46341,3).I understand I can perform bloc processing but I'm still interested in knowing if there is a direct solution to this problem. My naive thought is that if I can identify where exactly this int that gave me the trouble is, I can then go in and change it to int64. So my questions are : 1) Is this approach plausible? 2) If so, exactly what should I change to solve this? If not, how can I solve this problem? |