2018-07-19 11:12:34 -0600 | marked best answer | How to use cvtColor convert UIImage to gray? I convert UIImage to Mat like this:(On iOS) UIImageToMat(image1, baseImage, true); And use imwrite("/home/before.png", baseImage); the output image is ok. I use the code like this to convert it to gray: cvtColor(baseImage, baseImageB, COLOR_BGRA2GRAY); And use imwrite("/home/after.png", baseImageB); the output image is black. and save it to txt file, it seems that there a many zeros, and at last some lines of 1.94871e+09 or some other value. And I tried COLOR_BGR2GRAY, RGB2GRAY, RGBA2GRAY, all failed. How to get the right gray image? I want to convert image to gray, because it shows the following error. Is there any other ways to fix it? ontours.cpp:199: error: (-210:Unsupported format or combination of formats) [Start]FindContours supports only CV_8UC1 images when mode != CV_RETR_FLOODFILL otherwise supports CV_32SC1 images only in function 'cvStartFindContours_Impl' Thanks! |
2018-07-19 11:12:34 -0600 | received badge | ● Scholar (source) |
2018-07-19 11:12:13 -0600 | commented answer | How to use cvtColor convert UIImage to gray? It works! Thanks very much! |
2018-07-19 09:56:55 -0600 | edited question | How to use cvtColor convert UIImage to gray? How to use cvtColor convert UIImage to gray? I convert UIImage to Mat like this:(On iOS) UIImageToMat(image1, baseImage |
2018-07-19 09:51:57 -0600 | received badge | ● Editor (source) |
2018-07-19 09:51:57 -0600 | edited question | How to use cvtColor convert UIImage to gray? How to use cvtColor convert UIImage to gray? I convert UIImage to Mat like this:(On iOS) UIImageToMat(image1, baseImage |
2018-07-19 09:50:26 -0600 | asked a question | How to use cvtColor convert UIImage to gray? How to use cvtColor convert UIImage to gray? I convert UIImage to Mat like this:(On iOS) UIImageToMat(image1, baseImage |
2018-07-18 19:33:11 -0600 | commented answer | How to compare two handwriting characters to get similarity score Thanks! Maybe I should try one shot learning or Siamese Network, and I found a paper here, it seems meet my requirements |
2018-07-17 19:41:41 -0600 | commented answer | How to compare two handwriting characters to get similarity score Thank you for your detailed reply.Yes, I just want to look at similarity between images. I just want to compare the simi |
2018-07-16 21:39:39 -0600 | commented question | How to compare two handwriting characters to get similarity score If I use CNN, the question of how similar the handwriting is to the standard word is a classification problem or a regre |
2018-07-16 03:54:28 -0600 | commented question | How to compare two handwriting characters to get similarity score I also thought about CNN or DNN, but I haven't figured out how to convert this problem into a neural network problem. Is |
2018-07-16 02:51:57 -0600 | asked a question | How to compare two handwriting characters to get similarity score How to compare two handwriting characters to get similarity score I want to compare two handwriting Chinese characters t |