Which is better in terms of time and complexity of the computations?
FFT is more complex as DCT is only the cosine part of FFT.
DCT is being used in JPEG compression. Of course, in the later version, Wavelet transforms are used.
DCT has a better energy compaction property compared to FFT. Hence, better then FFT for compression.
In compression, DCT is always better than DFT, except for an even signal where both are same. Both DCT and DFT are implemented using FFT algorithms.
Hello The first step of building any image indexing algorithm is to define what type of image descriptor you are going to use. Are you trying to extract (color features, texture features, shape...
31 December 2018 3,114 0 View
Hello, I am a bit confusing about the meaning of the terms, Image descriptor, feature descriptor, feature vector. My understanding is illstrated as follow: Image descriptor --> data get from...
31 December 2018 428 3 View
I'm looking for difference between gSpan algorithm and other frequent subgraph mining algorithms. thanks for your helpful
02 March 2018 6,177 0 View
What are the trends of the new world About Deep Neural Network (DNN)?
04 May 2017 6,488 0 View
Results of single-case research designs (i.e., n-of-1 trials) are often evaluated by visually inspecting the time-series graph and computing quantitative indices. A question our research team is...
03 March 2021 687 1 View
dear community, my model is based feature extraction from non stationary signals using discrete Wavelet Transform and then using statistical features then machine learning classifiers in order to...
03 March 2021 6,994 5 View
Hello, I'm fairly new to ARENA and I have the following problem: I have two queues in which, in each queue, a different order type arrives (both having an arrival rate of exponential 10). Order...
02 March 2021 2,431 3 View
Do you have some recommendations approaches on Image processing and classification of plant diseases using TensorFlow/Keras?
02 March 2021 1,493 4 View
Working on chandrayaan-2 DFSAR data, there are three datasets available: 1) Slant range image data product: The slant range complex image file. Each pixel is represented by two 4-byte floating...
02 March 2021 8,481 3 View
I would like to research on MR images (0.5T and 3T). Can you please suggest some websites that I can download dataset including both 0.5T and 3T MR images? Thank you.
02 March 2021 7,735 3 View
To dear Researchers, I was analyzing a series of concentration for estimation of Real-Time PCR efficiency. The concentration was 1:10. I used MS-excel to evaluate Slope. The result of slope was -8...
01 March 2021 8,683 4 View
I would like to get more information on the cyclic compressive fatigue testing (BS EN 12697 - 25) which is typically done for bituminous material in pavement design. Any one can advise on the...
28 February 2021 2,004 3 View
25 February 2021 6,760 1 View
25 February 2021 1,987 3 View