How to read bmp file byte by byte?

Question

Node.js

I want to encode an image using the Huffman algorithm. For this purpose, you need to read the image matrix, apply the Huffman algorithm to it, change the image header by inserting an encoding table there and change the offset for the image accordingly. How to start? I don't understand how to read individual bytes of an image.

Answer 1

learning someone else's code helps a lot, no matter what language

Answer 2

Read the specification, how it is stored there.
(sarcasm) And how to read byte by byte, you can open it in Sublume Text 3, good support for displaying in HEX form. (/sarcasm)