Abstract:
A method for removing a sunspot of an image sensor, an apparatus for removing a sunspot of an image sensor and an image sensor are provided. The method includes: obtaining reset sampling signal values of pixel units in a pixel array of the image sensor; for each of the reset sampling signal values, determining whether the reset sampling signal value is less than a predetermined sampling signal threshold, and generating a comparing signal when the reset sampling signal value is less than the predetermined sampling signal threshold; generating location information of the pixel unit corresponding to the reset sampling signal value according to the comparing signal; and replacing the reset sampling signal value corresponding to the location information with a maximum brightness value.
Abstract:
An image forming system and an image sensor are provided. The image forming system (100), including: a substrate (10); a pixel array (20), formed on the substrate (10), including a plurality of pixel units, wherein each pixel unit includes: an image pixel subunit (25), a collecting pixel subunit (24), and an electroluminescent sheet (26), configured to cover the image pixel subunit (25); and a controller (30), connected with the pixel array (20) and configured to control the collecting pixel subunit (24) to detect incident light, such that the collecting pixel subunit (24) generates a voltage signal according to an intensity of the incident light and outputs the voltage signal to the electroluminescent sheet (26) so as to enable the electroluminescent sheet (26) to generate an attenuated optical signal from the incident light; and to control the image pixel subunit (25) to detect the attenuated optical signal, such that image pixel subunit (25) generates an image signal according to the attenuated optical signal.
Abstract:
A method for reading out a high dynamic range image frame in an image sensor and a device using the same are provided. The image sensor comprises a pixel array with a plurality of pixels arranged in columns and rows. The device comprises a pixel array comprising a plurality of pixels arranged in columns and rows; a calculating unit, configured to calculate and determine a first integration time and a second integration time according to an output image frame information; and an integration time processing unit.
Abstract:
A method and a device for obtaining a high dynamic range image are provided. The method includes: obtaining a pixel value of each pixel in two images of a same scene; determining a brightness value of each pixel in the two images; determining an objective brightness value of each pixel in a combined image combining the two images; determining a color value of each pixel in the two images; determining a color value of each pixel in the combined image; correcting the color value of each pixel in the combined image so as to obtain a corrected color value of each pixel in the combined image; determining a pixel value of each pixel in the combined image; and obtaining a high dynamic range image.
Abstract:
A method and a device for enhancing an edge of an image are provided. The method includes: obtaining a first gradient value of a pixel; determining whether the pixel is at a rough edge according to the first gradient value; if yes, obtaining a first edge enhancement value of the pixel and obtaining a first edge enhancement result of the pixel according to the first edge enhancement value; if no, obtaining a second gradient value of the pixel; determining whether the pixel is at a tiny edge according to the second gradient value; if yes, obtaining a second edge enhancement value of the pixel and obtaining a second edge enhancement result of the pixel according to the second edge enhancement value; if no, obtaining the pixel value of the pixel as the edge enhancement result of the pixel; and repeating above steps until each pixel of the image is processed.
Abstract:
The present invention proposes an image sensor, a monitoring system and a method for designing an image sensor, the image sensor including: a color filter, wherein, for light in infrared wavebands, the color filter only allows particular-wavelength infrared light to pass, and the color filter includes multiple n-color filters, wherein each filter corresponds to one color, the multiple n-color filters are used for dividing visible light in incident light into n-color light; and a light-sensitive chip, including a signal processing circuit and multiple light-sensitive units, the multiple light-sensitive units are respectively used for sensing intensity of light transmitting through the multiple n-color filters and generating electric signals corresponding to the light transmitting through the multiple n-color filters, the signal processing circuit is used for processing the electric signals for imaging, wherein a gain ratio of the signal processing circuit to the electric signals is A1: A2: ...: Ai: ...: Aj: ...: An, wherein an intensity transmittance of the multiple n-color filters to the particular-wavelength infrared light is M1: M2(A1/A2): ...: Mi(A1/Ai): ...: Mj(A1/Aj): ...: Mn(A1/An). The image sensor of the present invention increases an application range of the image sensor by adjusting optical characteristics of the color filter to achieve color cast desired by a user.
Abstract:
A method and a device for enhancing an edge of an image are provided. The method includes: obtaining a first gradient value of a pixel; determining whether the pixel is at a rough edge according to the first gradient value; if yes, obtaining a first edge enhancement value of the pixel and obtaining a first edge enhancement result of the pixel according to the first edge enhancement value; if no, obtaining a second gradient value of the pixel; determining whether the pixel is at a tiny edge according to the second gradient value; if yes, obtaining a second edge enhancement value of the pixel and obtaining a second edge enhancement result of the pixel according to the second edge enhancement value; if no, obtaining the pixel value of the pixel as the edge enhancement result of the pixel; and repeating above steps until each pixel of the image is processed.
Abstract:
The present invention proposes an image sensor and a monitoring system, the image sensor including: a color filter arranged to allow a particular-wavelength infrared light to pass for light in infrared wavebands, and comprising a plurality of n-color filters, wherein each of the plurality of n-color filters corresponds to one color, the plurality of n-color filters are configured to divide visible light of incident light into n-color light, wherein n is a positive integer; and a light-sensitive chip located below the color filter, wherein the light-sensitive chip comprises a signal processing circuit and a plurality of light-sensitive units one-to-one corresponding to the plurality of n-color filters, the plurality of light-sensitive units are respectively arranged to sense intensity of light transmitting through the plurality of n-color filters and to generate electric signals corresponding to the light transmitting through the plurality of n-color filters, the signal processing circuit is configured to process the electric signals for imaging; wherein a gain ratio of the signal processing circuit to the electric signals is A1: A2: ...: An, and an intensity transmittance ratio of the plurality of n-color filters of the color filter to the particular-wavelength infrared light is 1: (A1/A2): ...: (A1/An). Through the image sensor of the present invention, the color of a shot image is the same as that observed by human eyes; and when visible light is weak while infrared light is strong, a clear black-and-white image can be shot, which has a wide application range and is convenient and reliable.