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camera device

A camera device and image technology, applied in image communication, TV, color TV components, etc., can solve the problems of significant color deviation, image color deviation, accumulation, etc., and achieve the effect of preventing color deviation

Active Publication Date: 2017-04-12
OM DIGITAL SOLUTIONS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This becomes the cause of the color deviation of the image
Especially in bulb photography, etc., when OB correction processing is repeated to obtain an added image, slight errors (of OB correction processing) are accumulated, and color deviation becomes conspicuous

Method used

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Experimental program
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Effect test

no. 1 Embodiment approach ）

[0038] figure 1 It is a block diagram showing the main electrical configuration of the camera 100 according to the first embodiment of the present invention. The camera 100 first includes a lens 1 , a diaphragm 2 , a mechanical shutter 3 , and an image sensor 4 in an imaging unit. The lens 1 is composed of a plurality of optical lenses for forming an optical image of a subject (subject image), and is a single focus lens or a zoom lens with a variable focal length. Not shown here, the lens 1 is composed of a focus lens and a lens driving mechanism. And, focusing is performed by moving the focus lens along the optical axis direction.

[0039] The aperture 2 is arranged behind the lens 1 or inside (gap) a lens group constituting the lens 1 . In addition, the aperture 2 has a mechanism for changing the aperture diameter (F number), and the aperture diameter is changed with respect to the amount of subject light transmitted through the lens 1 to thereby vary the amount of trans...

no. 2 Embodiment approach ）

[0099] Next, use Figure 8 to Figure 11A second embodiment of the present invention will be described. In the first embodiment of the present invention, when generating the added image data, the image processing unit rolls up and carry bits below the decimal point of the average value for the average value of the OB pixel signal to be used next time. Prevent color deviation. In the second embodiment, the calculation of bits below the decimal point of the OB pixel output average value in the first embodiment is performed. On this basis, the difference between the shading signal of the effective pixel and the average value of the OB pixel signal (hereinafter referred to as the OB step difference) is also calculated, and the added pixel signal is corrected according to the difference. By performing this correction, the occurrence of color shift during OB correction is further prevented. This color shift is caused by the level difference between the effective pixel signal and t...

no. 3 Embodiment approach ）

[0126] Next, use Figure 12 to Figure 15 A third embodiment of the present invention will be described. Figure 12 Flowchart showing photographic actions (corresponding to Figure 8 ),also, Figure 13 shows the operation block diagram of adding pixels, Figure 14 Shows the role in the flow chart of image synthesis.

[0127] In the first and second embodiments of the present invention, the OB pixel signal average value is subtracted as OB value 1 from the image data obtained at the N-th exposure, which corresponds to the RAW image data 1 . On the other hand, in the third embodiment, instead of the OB pixel signal average value, the OB value 1 is corrected based on the average value of effective pixel signals at the time of light blocking. Hereinafter, the correction of the OB value 1 is referred to as NR (Noise Reduction, noise reduction) processing. In addition, in general, the number of pixels in the effective imaging area of ​​the pixel element (image sensor 4 ) is larg...

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Abstract

A camera device is provided. The imaging device of the present invention has a function of displaying an image in the middle of shooting during long-time exposure such as bulb shooting, and prevents color shift from occurring in the added image. This imaging device has: an image sensor (4), which has an OB pixel area (4b) and an effective pixel area (4a), and repeatedly reads out image data according to a predetermined time interval; ) the OB subtraction part and the roll-in next part in the average value of the OB pixel output read out; the image synthesis part (11), which sequentially accumulates the image data read out from the effective pixel area of ​​the image sensor (4) Addition, to generate an added image, when the calculation is applied to the OB value whose cumulative addition times are the second time and after the second time, it is calculated for the image data read out from the OB pixel area (4b). The OB pixel average value is added to the OB pixel average value stored in the memory (11d) and rolled into the next part.

Description

technical field [0001] The present invention relates to imaging devices. Specifically, this imaging device performs addition every time an image signal output repeatedly read from an image sensor is read out to generate an added image. Furthermore, it relates to an imaging device for preventing output of an image signal based on a black level from an OB region pixel (Image pixel at Optical Black region: optical black region pixel) in an image sensor when an added image is generated. The color deviation of the added image produced by the error. Background technique [0002] The imaging device has an image sensor (image sensor) such as a CCD (Charge Coupled Device: Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor: Complementary Metal Oxide Semiconductor) in which each pixel is provided with a photodiode (Photo Diode). The image sensor photoelectrically converts a subject image to obtain an image signal. It is known that each photodiode located in ea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/357
CPCH04N23/63H04N25/633H04N25/671H04N25/63
Inventor 岩崎宏明市川学
Owner OM DIGITAL SOLUTIONS CORP