| 摘要 |
An imaging apparatus for the present invention comprises an image sensor which repeatedly reads out image data, an OB calculating unit which calculates a representative value of OB output levels read from the image sensor; and a memory which stores the representative value of OB pixel output levels calculated by the OB calculating unit in a manner of dividing into a part for subtraction (a integer part) and a part for carrying-over (a decimal part); and an image synthesizing unit which sequentially adds the image data read from an effective pixel region in the image sensor and generates an added image, wherein the above-described image synthesizing unit subtracts the part for subtraction of the representative value of OB pixel output levels stored in the memory (OB subtraction part) from either the generated added image, or the image read from the effective pixel region, and, when a next OB value for addition after second addition is calculated, the OB calculating unit adds the carrying-over (decimal) part to the representative value of OB output levels stored in the memory for the representative value of OB output levels calculated using the image data read from the OB pixel regions. |
| 主权项 |
1. An imaging device, comprising:
a) an image sensor for repeatedly reading and outputting image data at predetermined time intervals; b) an image processing unit having an image synthesizer for creating combined image data based on the image data output by the image sensor; and c) an image memory for storing the combined image data created by the image synthesizer, wherein, the image synthesizer includes 1) an input for receiving an average value of optical black output from a plurality of pixel output values of the image data, 2) memory including a first storage section for storing the average value received, and a second storage section for storing a first value that is calculated as an integer portion of the average value from the first storage section, and storing a second value that is calculated as a decimal portion of the average value from the first storage section, 3) an image addition section for generating cumulatively added image data by additive combination processing of (i) first image data constituted by pixel output values corresponding to an effective pixel region of the image sensor and (ii) second image data constituted by the combined image data that has been read out from the image memory, and 4) an image compensation section for performing subtraction processing for subtracting the second value output by the first storage section of the memory, from respective pixel outputs contained in one of (A) the cumulative added image data, or (B) the first image data, wherein the first storage section performs addition processing for an average value of the optical black output and a previous second value stored in the second storage section, and wherein the image memory stores cumulatively added image data that has been created by the image adding section, or cumulatively added image data that has been subjected to subtraction processing by the image correction processing section, as the combined image data. |
