In order to spot hidden images in a written text you must convert it to an image. To do this, I wrote a program called Text to Image and I am sharing here a link to download it. By translating the ASCII codes of the text into color information for each image pixel, the program will produce a BMP image you can open in an image viewer. You can then study the patterns to try and spot any intelligible shape.
Click the button below to download Text to Image from GitHub.
Once you download and unzip the file to a folder, please read instructions contained in the Readme.txt file before using the program.
An example of output
The image below was obtained by processing a text file containing Alice’s Adventures in Wonderland by Lewis Carrol.