A semi-automatic injection device is disclosed containing two reservoirs of medicament, where a trigger controls the unwinding of two torsional springs to cause simultaneous injection of medicament from each reservoir through a needle adaptor configured with a 2 to 1 needle cannula arrangement. A 3DLUT for carrying out the tone conversion processing and the color correction processing on the image data obtained by the digital camera is generated by image processing condition determining means. Each player places an ante and a bonus wager at the start of the game and must place a third wager to continue into the challenge round.