1. A method of recognizing information included in an image, the method comprising: detecting an ambient illuminance; based on the detected ambient illuminance being less than a reference illuminance: capturing, by a first image capturer, a plurality of first image frames per unit time based on the detected ambient illuminance when a moving object enters a predetermined area monitored, determining a speed of the moving object based on the plurality of first image frames captured per unit time, outputting, by the first image capturer, a trigger signal based on the speed of the moving object, upon receiving the trigger signal from the first image capturer, capturing, by a second image capturer, a plurality of second image frames of the moving object according to at least one of a shutter opening time of the second image capturer and an illuminance of an illuminator to illuminate the moving object which are set based on the detected ambient illuminance and the determined speed of the moving object, and extracting information of the moving object from the plurality of second image frames; and based on the detected ambient illuminance being greater than or equal to the reference illuminance: turning off the second image capturer, capturing, by the first image capturer, a plurality of third image frames of the moving object, and extracting the information of the moving object from the plurality of third image frames captured by the first image capturer without performing the capturing the plurality of first image frames per unit time, the determining the speed of the moving object, and the outputting the trigger signal, wherein the first image capturer is a visible light camera that captures visible light images, and the second image capturer is an infrared (IR) camera that captures IR images, wherein the shutter opening time is set to be inversely proportional to the determined speed of the moving object, and wherein the illuminance of the illuminator is set to be inversely proportional to the shutter opening time.