It’s fairly common in Nonogram games to display the image of the puzzles you’ve completed. in Mario Picross, it was the final pixel solution, while in Konami Pixel Puzzle, it’s a the full color image. while I COULD do either one, It’s probably best to keep it simple and go with the former’s solution- I already basically create the CHR data info when parsing out the clue numbers, so just repurposing the data will work just fine!