nur aqila

Actif depuis 2017

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How to save code for each block ?
Hi, I have constructed a huffman coding. supposedly the coding should read the pixel number block by block and then save the huf...

plus de 6 ans il y a | 1 réponse | 0

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Question

what is the function of predictive coding ?
Hi, I want to ask regarding lossless image compression. what is the function of performing predictive coding before using Huffma...

plus de 6 ans il y a | 1 réponse | 0

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Question

How to write a program that read block by block ?
I am having a matrix of size 512x512. Now I have to extract 16x16 blocks from the matrix and encode each of the blocks. Now ther...

plus de 6 ans il y a | 1 réponse | 0

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Question

How to calculate entropy for 1D?
Hi, I have 1D data which I got after encoding an image, the data only have value 0 and 1. How can I calculate the entropy of the...

plus de 6 ans il y a | 1 réponse | 0

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Question

How can I convert 1D array into 2D array ?
Hi, I have 512x512 image size and I want to convert the pixel to 1D matric. How can I convert from 2D into 1D without changing t...

plus de 6 ans il y a | 1 réponse | 0

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Question

How to transform 16-bit pixels into 8-bit pixels ?
Hi, I want to ask. I already constructed a coding which can only process 8-bit image(grayscale). But my problem right now some i...

plus de 6 ans il y a | 1 réponse | 0

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Question

how to decode to get the symbol number ?
Hi, I'm currently constructing a code for truncated Huffman.I already encoded the program, but I don't know how to decode it bac...

plus de 6 ans il y a | 1 réponse | 0

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Question

How to solve "Subscripted assignment dimension mismatch" error ?
Hi, I have 3 input which is 1 7 6 and the output supposed to be 00 for input 1, 110000 for input 7 and 1011 for input 6. my outp...

plus de 6 ans il y a | 1 réponse | 0

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Question

how to encode and decode negative pixel to positive pixel in matlab ?
hi, I want to ask. I have 512x512 image and I want to calculate the entropy. But, it has some error because the pixel contains n...

plus de 6 ans il y a | 1 réponse | 0

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Question

what is the wcodemat should I used ?
Hi, I wanna use this command "image(wcodemat(H2,192))" . but I don't know what is the suitable NBCODES for 512x512 image. may I ...

plus de 6 ans il y a | 1 réponse | 0

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Question

How to resolve the "Index exceeds matrix dimensions" error ?
Hi, I did some coding for lossless image compression and I want to calculate the entropy value. the error "Index exceeds matrix ...

plus de 6 ans il y a | 1 réponse | 0

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Question

how to get rid of the error for predictive coding ?
hi, I want to perform hybrid lossless image compression where I combine dpcm and iwt for predictive coding. I already did combin...

presque 7 ans il y a | 1 réponse | 0

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Question

how to know how many number of symbol needed for huffman coding ?
hi, I want to perform Huffman coding for 512x512 image. I'm new to this. how do I know how many numbers of symbols (NOS) do I ne...

presque 7 ans il y a | 1 réponse | 0

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Question

how to calculate entropy in matlab for lossless image compression ?
hi, I already perform iwt coding for the lossless image compression with image size 512x512 but I don't know how to calculate th...

presque 7 ans il y a | 1 réponse | 0

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Question

HOW TO CALCULATE ENTROPY FOR IWT ?
hi, I already perform iwt coding. I have "case" command which allows me to choose at which level I want to perform image decompo...

presque 7 ans il y a | 1 réponse | 0

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Question

How to calculate entropy for IWT image decomposition ?
Hi, I wanna ask. If I already perform Integer wavelet transform and I did 9 level image decomposition (I use image size 512X512)...

presque 7 ans il y a | 1 réponse | 0

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Question

how to encode and decode IWT until 9 level
hi, I'm having a problem in performing IWT for 9 level. I already had matlab code for the first level, but I don't know how to d...

presque 7 ans il y a | 1 réponse | 0

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réponse