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2016-02-08 14:08:19 -0600 | asked a question | mean prediction in a image Hi everyone. I just want to ask what means mean prediction in a image, to improve the quality of its. I tried to found some information on internet, but I'm not sure of what to do. From wikipedia, I understand the Mean-Prediction in a JPEG image is the value of 2 blocks + the variance of the block. The problem is i dont understand what I need to do for improve the quality of a JPEG image. Is more a theorical question, but I really need help to understand what to do when a compression value affects the quality of a original image, and how to applie it. Is there a function on OPENCV that could help me? Thank you. http://stats.stackexchange.com/questi... This one is for the error. |
2016-01-15 21:24:24 -0600 | commented question | Evaluation of 2 frames after encoding/decoding Actually, I found the problem. My problem was when I read the image, i didnt put the '0' in the flag. Then, I tried to change everything to CV_8U and then i found the PSNR. @Tetragramm thanks for your help, I really appreciate it. You are the best in this forum. |
2016-01-15 20:56:10 -0600 | asked a question | Evaluation of 2 frames after encoding/decoding Hi everyone, Another question, I capture 2 frames and then I obtain the absolute error of them: Everything ok at this point. But later I need to encoder/decoder the image and the evaluate that result with the first error (for obtain the PSNR for example) imwrite("error.jpeg",error); Mat error2 = imread("error.jpeg"); The problem here is error2 and error1 are different. I tried everything without success, but I cant understand why for example I dont know what yo do. Did someone could help me? Thank you very much. |
2016-01-15 19:51:05 -0600 | commented answer | Could OpenCV return a matrix for a function? It was the hour! lol TY! |
2016-01-15 18:04:59 -0600 | received badge | ● Scholar (source) |
2016-01-15 18:04:05 -0600 | asked a question | Could OpenCV return a matrix for a function? Is a really simple question, but I need the answer. Image this code In functions.h functions.cpp The error ls Description "‘matrix_error’ was not declared in this scope". I know that im doing a really stupid mistake, but IDK where. If someone could help me I will appreciate. Thanks. |
2016-01-11 18:29:13 -0600 | commented question | Block-matching Algorithm in OpenCV? I will give a look. Actually, now I made it using matchTemplate technique, thanks to you. So I suposse I'll close the question. Thanks again @Tetragramm |
2016-01-10 18:12:21 -0600 | commented question | Block-matching Algorithm in OpenCV? I know!, actually im working in that now and it seems nice. But anyway, I want to know what Im doing wrong in my project. Thanks again for the help. |
2016-01-09 15:36:11 -0600 | asked a question | Block-matching Algorithm in OpenCV? Hi everyone, I have a question if its possible to find a Block Matching Compensation Algorithm in OpenCV, or if exits a more easy method to implement it. I tried to implement it, witout success. Everything ok until here, But when i try to implement the algorithm, the result are not good. In big words, Im using Rect() to evaluate one block with another in a range of [-search:search] and when i found the minimun error, I stored at a matrix x and y. Then, I plan to fullfill the blocks into a big image, but my result of X and Y doesnt make sense. I will appreciate any help. The algorithm runs but the results are not good. Thank you! UPDATED: Template Matching function could help me in this situation? |
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2016-01-05 14:53:21 -0600 | commented answer | OpenCV installation into eclipse Check the last part of the PDF, when you need to configure OpenCV in Eclipse. You can see the images to give you an idea. Remenber, the last part! |
2016-01-05 09:07:49 -0600 | received badge | ● Critic (source) |
2016-01-05 08:36:42 -0600 | answered a question | OpenCV installation into eclipse Hi: Check this pdf: http://projects.i-ctm.eu/sites/defaul... is the way that I configure OpenCV in Eclipse. Try to follow the last images, the last part. Tell me if its works in the end or not. |
2016-01-05 08:25:15 -0600 | commented question | motion COMPENSATION between 2 frames? I have frame1 and frame2, and Im trying to compensate the image and I Obtained the the 3rd frame. Is still unclear? I'm separating the 2 images into macroblocks and then I compare each macroblock, so I obtain compensate frame. Still unclear? I dont know if its allowed to put MatLab code to check my process. |
2016-01-05 06:38:50 -0600 | commented question | motion COMPENSATION between 2 frames? Hi, I updated my question. |
2016-01-04 11:53:45 -0600 | received badge | ● Editor (source) |
2016-01-04 11:51:17 -0600 | asked a question | motion COMPENSATION between 2 frames? Hello, my question is simple. I want to know how I could get a frame as the result of compensation between 2 images. I understand functions as goodFeaturesToTrack() and cvCalcOpticalFlowPyrLK(), but my question is to OBTAIN the result of a compensated frame, not the estimation. I mean, to obtain the compensated frame between 2 frames. I will appreciate any help, I'm newbie in OpenCV. UPDATED: To reply the question, a compensated frame is the result of the prediction between 2 frames, and is used to reduce the data for video processing. In the end, the substraction between 2 frames will give us a 'error frame' and this one will be encoder for transmission. The result between a frame and a compensated frame will give us a less error frame, that will improve the PSNR and reduce the bit-rate. Im putting an example of my work in MatLab, that I want to implement in OpenCV. |
2015-12-30 07:56:00 -0600 | commented answer | Motion estimation between 2 frames Let me give a check and I will give you an answer. Thanks for the reply, Happy new year! |
2015-12-30 07:53:52 -0600 | received badge | ● Supporter (source) |
2015-12-30 06:15:11 -0600 | asked a question | Motion estimation between 2 frames Hi everyone: I want to try a Motion Estimation & Compensation between 2 frames. For that, I need to extract 2 consecutive frames, and then evaluate them. My result have to be the image of the compensate frame with the first one. Any ideas? Because to implement the algorithm is really a pain. I did it on MatLab, but I couldn't implemented on openCV. Thanks you! This is my result using matlab: UPDATE: I think I could interpolate 2 frames to obtain what I need. Someone could give me a hand please? |