Patent ID: 9047672
Filing Date: 2015-06-02
Classification: G06T

Abstract:
1. An image generation apparatus, comprising: an optical unit which condenses infrared rays from an image capturing target containing a target object and acquires a specific wavelength band from the condensed infrared rays; an uncooled infrared image sensor which generates an infrared image corresponding to a temperature of the image capturing target based on the wavelength acquired by the optical unit; and an image processing unit which generates an arithmetically processed image by performing arithmetic processing on luminance values of the infrared image, wherein the image processing unit comprises: a resolution sensitivity conversion module which generates a plurality of different weight-averaged images corresponding to a plurality of weighted-filter image of different pixel numbers by performing a convolution operation of filter coefficients of each of the weighted-filter images and luminance values at corresponding positions in the infrared image, and generates a resolution-sensitivity-converted image by adding luminance differences of the pixels of the different weight-averaged images to respective luminance values of the corresponding pixels of the infrared image; a luminance histogram arithmetic operation module which generates a luminance histogram that shows appearing frequency of the luminance value of each pixel that forms the resolution-sensitivity-converted image; a luminance level adjusting module which sets a gradation range of the resolution-sensitivity-converted image to an enlarged range set in advance, sets a most frequently appearing luminance value that is a luminance value whose appearing frequency in the luminance histogram is the maximum to an intermediate value in the enlarged range as an intermediate luminance value, and generates a luminance-shifted image by linearly shifting each luminance value of the resolution-sensitivity-converted image by corresponding to the enlarged range and the intermediate luminance value; and a luminance arithmetic operation processing module which generates a reverse shifted image in which light and shade of luminance levels of the luminance-shifted image are reversed, and generates the arithmetically processed image by performing arithmetic processing based on differences in the luminance values of the corresponding pixels in each of the reverse shifted image and the luminance-shifted image.