How to covert binary data to original data format?

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Athira T Das
Athira T Das 2025-1-21
评论： Walter Roberson 2025-1-30
I wrote a code that can convert an image or any data format to binary. Now I need to convert back the binary data to the picture or the corresponding format. Any one please help me with this.
clc;close all;clear all;
%Any file to binary
fid = fopen('file.pdf');
bits = fread(fid, inf, '*ubit1', 'b');
fclose(fid);

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回答（1 个）

Walter Roberson
Walter Roberson 2025-1-21
You cannot generally convert the uint8 stream into an in memory version of the original object. For example if you have the uint8 stream that results from reading ubit1 from an image file, then you cannot generally convert the stream into the image (without a bunch of hard work.) Likewise you cannot convert the uint8 stream of a database file into a copy of the database (without a bunch of hard work.)
You can construct another file that contains the original content, by using fwrite() with 'ubit1' precision .
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Walter Roberson
Walter Roberson 2025-1-30
Ran in:
% Read the image
originalImage = imread('indiancorn.jpg'); % Replace 'your_image.jpg' with your image file
grayImage = rgb2gray(originalImage);
binaryImage = imbinarize(grayImage);
linearBinaryArray = binaryImage(:);
savedBinaryArray = linearBinaryArray;
reshapedBinaryImage = reshape(savedBinaryArray, size(binaryImage));
% Convert the binary image back to grayscale
reconstructedGrayImage = uint8(reshapedBinaryImage) * 255;
figure;
subplot(1, 2, 1);
imshow(grayImage);
title('Original Grayscale Image');
subplot(1, 2, 2);
imshow(reconstructedGrayImage);
title('Reconstructed Grayscale Image');
●
%imwrite(reconstructedGrayImage, 'reconstructed_gray_image.jpg');
This is what you should expect from binarizing an image.
Walter Roberson
Walter Roberson 2025-1-30
Ran in:
% Read the image
originalImage = imread('indiancorn.jpg'); % Replace 'your_image.jpg' with your image file
grayImage = rgb2gray(originalImage);
linearBinaryArray = dec2bin(grayImage(:),8) - '0';
savedBinaryArray = linearBinaryArray(:);
savedBinaryArray8 = char(reshape(savedBinaryArray,[],8) + '0');
reshapedBinaryImage = reshape(bin2dec(savedBinaryArray8), size(grayImage));
% Convert the binary image back to grayscale
reconstructedGrayImage = uint8(reshapedBinaryImage);
figure;
subplot(1, 2, 1);
imshow(grayImage);
title('Original Grayscale Image');
subplot(1, 2, 2);
imshow(reconstructedGrayImage);
title('Reconstructed Grayscale Image');
●
%imwrite(reconstructedGrayImage, 'reconstructed_gray_image.jpg');

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