scispace - formally typeset
Patent

Solid-state image pickup apparatus having a defect detecting mode

Kameyama Takashi, +1 more
Reads0
Chats0
TLDR
In this article, a solid-state image pickup apparatus for use as a video camera has a defect detecting mode and an operation mode, which includes a solid state image sensor having pixels arranged in rows and columns for producing an output signal representing a detected image.
Abstract: 
A solid-state image pickup apparatus for use as a video camera has a defect detecting mode and an operation mode The solid-state image pickup apparatus includes a solid-state image sensor having pixels arranged in rows and columns for producing an output signal representing a detected image The solid-state image sensor operates in a field reading mode for reading electric charges from the pixels in approximately one field period such that the electric charges of the pixels of two adjacent rows are summed before being outputted from the solid-state image sensor, the summed electric charges being different in even- and odd-numbered fields, and also operates in a frame reading mode for reading electric charges from the pixels in approximately one frame period such that the electric charges of the pixels of one of two vertically adjacent rows are read in even-numbered fields and the electric charges of the pixels of the other of two adjacent rows are read in odd-numbered fields The positions of defective pixels of the solid-state image sensor are detected in the defect detecting mode, the defective pixels causing noise in the output signal at corresponding times in sampled data of the output signal The detected positions of the defective pixels are stored in a memory When the defect detecting mode is selected, the solid-state image sensor is controlled to operate in the frame reading mode

read more

Citations
More filters
Patent

Error calibration for digital image sensors and apparatus using the same

Jonathan C. Kagle, +1 more
TL;DR: In this paper, the authors present methods of manufacturing a digital apparatus having compensation for defective pixels, where the compensation circuitry compensates the digital data representative of the image using the information indicative of the locations of the defective pixels.
Patent

Digital camera with built-in lens calibration table

Eran Steinberg, +4 more
TL;DR: In this article, a transformation between the dust map and the specific lens calibration table, enables the use for a single dust map in multiple instances of lenses and focal length, without the need to recalibrate the digital camera for each instance.
Patent

Electronic camera capable of detecting defective pixel

Jun Takayama, +1 more
TL;DR: In this paper, the authors conducted photographing for one image plane under the completely dark condition created by closing aperture 12 when the power supply was turned on, then image data obtained from this photographing were compared with a threshold value, and when the image data showed higher luminance than the threshold value the image were detected to be defective pixels (white flaws) and positional information thereof was stored.
Patent

Detection and removal of blemishes in digital images utilizing original images of defocused scenes

Eran Steinberg, +2 more
TL;DR: In this article, a statistical dust map is formed including mapped dust regions based on the determining and associating, and pixels corresponding to correlated dust artifact regions are corrected within further digitally-acquired images.
Patent

Automated statistical self-calibrating detection and removal of blemishes in digital images based on multiple occurrences of dust in images

Eran Steinberg, +7 more
TL;DR: In this article, a statistical dust map is formed including mapped dust regions based on the determining and associating, and pixels corresponding to correlated dust artifact regions are corrected within further digitally-acquired images.
References
More filters
Patent

Dark current and defective pixel correction apparatus

Fumihiko Sudo, +1 more
TL;DR: In this article, a dark current correction scheme was proposed to eliminate the dark current signal component or components from an output signal of an imaging device having an array of pixels by using an A/D converter and a memory for storing level data of the digitized signal.
Patent

An image defect correcting circuit for a solid state imager

Fumihiko C, +1 more
TL;DR: In this article, an image defect correcting circuit for a solid state imager is arranged such that levels of output signals of pixels of a solid-state image pickup element (51R, 51G, 51B) illuminated on its whole surface with a light of uniform brightness are compared with a predetermined level, data indicative of a position of a pixel which outputs a signal of peculiar level is generated on the basis of the compared result.
Patent

Pixel defect correction apparatus

Hiroki Matsuoka, +2 more
TL;DR: In this paper, a failure correction circuit includes a memory having information of image failure of a solid state imaging device, a coincidence detection circuit for detecting a position of pixel having a failure at the time of image pick up, and a failurerection circuit.
Patent

Temperature tracking defect corrector for a solid-state imager

Peter A. Levine
TL;DR: In this article, a defect corrector for a solid-state imager in which temperature tracking defect correction signals associated with the defective pixels are generated is presented. And the defect correction signal is combined with photoresponse signals from the corresponding defective pixels to provide defect compensation.
Patent

Circuit and method for normalizing detector circuit

John Carl Noeth, +4 more
TL;DR: In this article, a dynamic detector normalization circuit for normalizing detector output data using detector-error-correcting offset and gain coefficients that are updated in real-time is presented, where the offset/gain coefficients are computed by a coefficient processor at selected update intervals based on detector responses to a reference source.