Patent ID: 8189097

Claim:
An adjusting method of flash intensity, applied in an image capture apparatus with a flash lamp, the adjusting method comprising: emitting a first pre-flash light by the flash lamp when the image capture apparatus photographs an object; retrieving a first pre-flash image corresponding the object under the first pre-flash light; emitting a second pre-flash light by the flash lamp when the image capture apparatus shoots the object, wherein flash intensity of the second pre-flash light is different from flash intensity of the first pre-flash light; retrieving a second pre-flash image corresponding the object under the second pre-flash light; obtaining a plurality of pixel values of the first pre-flash image; obtaining a plurality of pixel values of the second pre-flash image; comparing the plurality of pixel values of the first pre-flash image with a preset threshold value respectively, and accumulating a first number, wherein the first number is a number of pixel values that are greater than the preset threshold value among the plurality of pixel values of the first pre-flash image; comparing the plurality of pixel values of the second pre-flash image with the reset threshold value respectively, and accumulating a second number, wherein the second number is a number of pixel values that are greater than the preset threshold value among the plurality of pixel values of the second pre-flash image; comparing the first number with the second number to obtain a comparison result; and selecting one of the first pre-flash image and the second pre-flash image to be a determined pre-flash image according to the obtained comparison result; calculating flash intensity of a main-flash light by utilizing the determined pre-flash image; emitting the main-flash light with the calculated flash intensity by the flash lamp; retrieving a main-flash image corresponding the object under the main-flash light; and outputting the retrieved main-flash image.