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| 2018-01-01 03:19:02 -0600 | commented question | good result or bad result for findHomography What do you mean by first-to-last ? and also can you give reference where you read it? thanks |
| 2018-01-01 03:04:26 -0600 | commented answer | good result or bad result for findHomography What is N here? |
| 2018-01-01 01:05:04 -0600 | commented answer | good result or bad result for findHomography thank you for clear answer with reference. |
| 2017-12-25 20:41:38 -0600 | commented answer | Energy computation of DCT of image + i tried this image blakcimage to estiate the entropy from your code. it entropy is 2.7... , which suppose to be 0. But n |
| 2017-12-25 20:40:34 -0600 | commented answer | Energy computation of DCT of image + i tried this image blakcimage to esti,mate the entropy from your code. it entropy is 2.7... |
| 2017-12-25 04:36:29 -0600 | commented answer | Energy computation of DCT of image + Also, i tested entropy from Matalb function E = entropy(I) and its entropy is 4.7701 while good contrast image entropy |
| 2017-12-25 04:22:18 -0600 | commented answer | Energy computation of DCT of image + i tested your entropy code on dark image. dark image. My entropy is 5.15207 which is same for my image attached with t |
| 2017-12-24 20:45:18 -0600 | commented answer | Energy computation of DCT of image + According to Parseval's theorem, https://en.wikipedia.org/wiki/Parseval%27s_theoremso. I computed energy = 1/ 2 (Sum |
| 2017-12-24 20:35:44 -0600 | commented answer | Energy computation of DCT of image + ok so far, i found this energy formula. https://en.wikipedia.org/wiki/Parseval%27s_theorem |
| 2017-12-22 23:42:20 -0600 | marked best answer | Energy computation of DCT of image + I am interested to know Energy of low and high frequency component of dct (discrete cosine transform) of image. Here, i found energy computation of signal I cannot find energy computation of low and frequency component of dct from image. so i used the energy computation of signal as shown formula below.
Below are the original, dct image and its energy computed from above formula. Original Image
dct of above image.
Then, i am using upper quadrant of image as low frequency and bottom corner quadrant of image is high frequency compoent. And their energy is as follows: 21.391 , 11.2572 My question is how to exactly find energy of frequency from DFT or DCT? Or Same formula of energy computation is used for image and signal processing? I need paper reference where formula of energy computation is given. Kindly, help me to understand. Thanks |
| 2017-12-22 23:42:09 -0600 | commented answer | Energy computation of DCT of image + Why did you do entropy = - entropy ? |
| 2017-12-22 23:41:55 -0600 | commented answer | Energy computation of DCT of image + Why did you do **entropy = - entropy** ? |
| 2017-12-22 02:49:58 -0600 | commented answer | Energy computation of DCT of image + i have googled many times but found different formula used for DCT in signal processing. i cannot find energy computati |
| 2017-12-22 02:45:00 -0600 | commented question | Energy computation of DCT of image + I need a reference paper where the formula is given. because i have to add reference in my thesis. |
| 2017-12-18 08:17:16 -0600 | edited question | Energy computation of DCT of image + Energy computation of DCT of image + I am interested to know Energy of low and high frequency component of dct (discrete |
| 2017-12-18 04:26:28 -0600 | commented question | Energy computation of DCT of image + I need a paper reference where formula of energy computation in DFT or DCT is given. Can anyone ref me if someone know. |
| 2017-12-17 23:12:53 -0600 | commented question | Energy computation of DCT of image + @sjhalayka, yes i am using discrete Image, And thank you for clearing my understanding. |
| 2017-12-17 23:11:50 -0600 | commented question | Energy computation of DCT of image + My question is about in Opencv |
| 2017-12-16 04:42:41 -0600 | received badge | ● Editor (source) |
| 2017-12-16 04:42:41 -0600 | edited question | Energy computation of DCT of image + Energy computation of DCT of image + I am interested to know Energy of low and high frequency component of dct (discrete |
| 2017-12-16 01:39:20 -0600 | asked a question | Energy computation of DCT of image + Energy computation of DCT of image + I am interested to know Energy of low and high frequency component of dct (discrete |
| 2017-11-29 18:13:18 -0600 | commented answer | Check if homography is good Or you mean if we preserve orientation then homography matrix is good? |
| 2017-11-29 17:59:33 -0600 | commented answer | Check if homography is good In my knowledge, if vertical lines are not vertical then homography matrix is not good. Is this correct? |
| 2017-11-29 17:55:55 -0600 | commented answer | Check if homography is good and if those two conditions are not satisfied then homography matrix is wrong? |
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| 2017-11-17 01:45:34 -0600 | asked a question | how to measure point spread function for estimating blur how to measure point spread function for estimating blur I want to estimate blur in image and from paper. I found that b |
| 2017-11-07 04:23:42 -0600 | marked best answer | How to find that image has distortion? I performed camera calibration on image. I want to know that how to decide that there is distortion in image? For example look at attached image. how can we say that image has distortion. Any idea? By visualization, we can say that image is too much distorted or calibration is not performed well. but how can we say with some computation method or some statistics?
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| 2017-11-07 04:23:42 -0600 | received badge | ● Scholar (source) |
| 2017-11-07 04:21:38 -0600 | answered a question | The program can't start because opencv_core2410d.dll is missing. You need to add path of opencv/x64/bin in environment variables of your system then it will work fine. |
| 2017-11-07 01:19:33 -0600 | asked a question | How to find that image has distortion? How to find that image has distortion? I performed camera calibration on image. I want to know that how to decide that t |
| 2015-03-17 01:20:48 -0600 | asked a question | accuracy Harris corner detection How to check the accuracy of detected corners by Harris corner method |
Please help me to figure out. thanks