Binary representation of ASCII values

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kartheek 2013-9-8

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https://ww2.mathworks.cn/matlabcentral/answers/86605-binary-representation-of-ascii-values

I have an image of size mXn and I want to generate the 8-bit representation of ASCII value of character/pixel and want to insert that into an array. how to proceed?

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Answer 1

Walter Roberson 2013-9-8

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https://ww2.mathworks.cn/matlabcentral/answers/86605-binary-representation-of-ascii-values#answer_96114

在 MATLAB Online 中打开

dec2bin(Value, 8) - '0'

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kartheek 2013-9-8

This converts a decimal number to binary. but i want the ascii code of the the decimal in binary 8 bit form

Walter Roberson 2013-9-8

在 MATLAB Online 中打开

dec2bin(Value + '0', 8) - '0'

provided that all the entries are single digit, and that you are not wanting to put in any spaces.

If the entries might be multi-digit, then are they always the same number of digits? If not then how do you want the empty locations indicated? As if they had printable 0's at the front? Or do you want the binary of a space character inserted? Should the empty-location processing be consistent per-row, per-column, or over the whole array ?

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Answer 2

Image Analyst 2013-9-8

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https://ww2.mathworks.cn/matlabcentral/answers/86605-binary-representation-of-ascii-values#answer_96134

We don't know what you mean. Your pixel's 8 bit values are already IN binary since it's digitized in the computer. So the only other way is to show it as a string, as Walter showed you. Since you didn't like that, I don't know what you want. Perhaps you want im2html: http://www.mathworks.com/matlabcentral/fileexchange/32273-im2html-m

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kartheek 2013-9-8

this is not i wanted. suppose i have an image array [1 2 3 4]. now, i want a function to convert its every element into the binary representation of their ascii values. i mean, the ascii representation of 1 is 49. i want a function that converts 1 to its binary 8 bit representation i.e., 00110001

Image Analyst 2013-9-8

That's precisely what Walter showed. Something like you showed HAS to be a string. If it were a number, say an integer, then 00110001 would really be 110,001 (one hundred ten thousand and one). I doubt that's what you want - if it is, explain why, because I see no use for that (turning 1 into 110,001, and turning 2 into 110,010, etc.) - I mean, they would not even be consecutive numbers anymore. What sense would that make???

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