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Image correction method and system

An image correction and image technology, applied in the field of images, can solve problems such as errors, time-consuming table look-up, affecting the correction rate, etc., to shorten the steps and time, avoid errors, and improve the correction efficiency.

Inactive Publication Date: 2019-04-26
SHENZHEN YIHUA COMP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the embodiments of the present invention is to provide an image correction method and system, aiming to solve the problem of time-consuming table lookup, affecting the correction rate, and errors caused by multiple readouts caused by relying on the lookup table method for image correction in the prior art

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Embodiment 1

[0024] figure 1 A flow chart of the image correction method provided by the embodiment of the present invention is shown. Such as figure 1 As shown, the embodiment of the present invention provides an image correction method, the method includes the following steps:

[0025] In step S101, the grayscale data of the first medium image is collected by the programmable logic device, the grayscale data includes bright data and dark data, the bright data is the data collected by the image sensor when the light source is bright, and the dark data The data is the data collected by the image sensor when the light source is off, and the first medium image is the sample image.

[0026] In this embodiment, a programmable logic device (Field-Programmable Gate Array, FPGA) is used to collect the first medium image, the first medium image sensor is an image that can be used as a calibration sample, and the collected first medium image The grayscale data includes bright data and dark data,...

Embodiment 2

[0054] Figure 5 The structural diagram of the image correction system provided by the embodiment of the present invention, for the convenience of description, only shows the part related to the embodiment of the present invention, the image correction system provided by the embodiment of the present invention includes: an acquisition unit 51, a writing unit 52 , readback unit 53 and correction unit 54, wherein:

[0055] The acquisition unit 51 is configured to acquire grayscale data of the first medium image through a programmable logic device, the grayscale data includes bright data and dark data, the bright data is data collected by the image sensor when the light source is bright, the The dark data is the data collected by the image sensor when the light source is off, and the first medium image is an image that can be corrected as a sample; the writing unit 52 is used to write the grayscale data of the first medium image according to the light source type into the sector...

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Abstract

The invention relates to an image correcting method and system. The method comprises the following steps: acquiring the gray data of a first medium image through a programmable logic device; according to the type of a light source, writing the gray data of the first medium image in a sector in the corresponding light source type of a flash memory; after restarting for a power failure, according to the corresponding sector, reading the gray data of the first medium data in the flash memory backward to the programmable logic device according to the sector; acquiring the gray data of a second medium image by the programmable logic device, according to the gray data, which is read backward to the programmable logic device, of the first medium image, correcting the gray data of the second medium image. An additional resume lookup table is not needed, the gray data of a correcting sample is directly read from the flash memory after restarting for the power failure, the correction can be performed, the correcting step is simplified, the correcting time is shortened, the correcting efficiency is improved, and besides, the situation that reading repeatedly causes errors is avoided.

Description

technical field [0001] The invention belongs to the field of images, in particular to an image correction method and system. Background technique [0002] The image sensor is a basic device for modern visual information acquisition. It converts the spatially distributed light intensity information incident on the photosensitive surface into a video signal output in time sequence, so that the image information of the object can be reproduced. In an ideal situation, when the image sensor is uniformly illuminated, the video signal amplitude output by each photosensitive element should be exactly the same, but in fact, due to many factors such as the process level of the device, 1 / f noise, optical system and charge transfer efficiency, etc. The influence of non-uniformity caused the problem of non-uniformity, so that under the same irradiance, the responsivity of each photosensitive element cannot be completely consistent, or even have a large difference. The non-uniformity of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/365
Inventor 刘华周艳玲
Owner SHENZHEN YIHUA COMP
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