How to get bits from jpg image

Processing Coding Questions
1

Context :

I coded an image generator. You choose a String as input, every char is converted into its binary ascii value and each bit represents a pixel (0 = white, 1 = black). The result is save as “image.jpg”

Question :

Now I’m coding the image decoder(in order to get a string from the image), but I have no idea of how I could get the array of bits back.
The first thing I did was to create an array of int and assign to it the value of image.pixels
But I can’t make sense of the result.

Any idea what to do?

1 Like
2

I just realised that jpg is not a lossless format, therefore what I want to achieve may be impossible

3

The idea is valid.

Just use pixels to receive your ascii binaries and then vice versa.

Or use bmp

4

Thank you, it worked perfectly

5

Hello @0ldBergamot,

There are other lossless formats available to you.

Take a look at the advanced section here:
https://processing.github.io/processing-javadocs/core/processing/core/PImage.html

Try this:

printArray(javax.imageio.ImageIO.getReaderFormatNames());

image
image776×691 23.7 KB

println() also prints a line of formats but gives an error message.

:)