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Image brightness statistical method and imaging equipment

A technology of image brightness and statistical methods, applied in the field of image processing, can solve the problems of image brightness statistics with limited processing capacity and difficult high bit width, and achieve the effect of convenient brightness statistics

Active Publication Date: 2020-05-05
BEIJING TUSEN ZHITU TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Embodiments of the present invention provide an image luminance statistical method and an imaging device to solve the problem that current FPGA and other hardware have limited processing capabilities and it is difficult to perform luminance statistics of high-bit-width images

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  • Image brightness statistical method and imaging equipment
  • Image brightness statistical method and imaging equipment

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Embodiment Construction

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0025] In order to facilitate understanding of the present invention, the following technical terms involved in the present invention are explained:

[0026] FPGA: Field Programmable Gate Array (Field-Programmable Gate Array). A semi-custom circuit in the field of Application Specific Integrated Circuit (ASIC for short).

[0027] Block RAM: Block Random Access Memory (Block Random Access Memory), also known as "Block Random Access Memory", is a small piece of...

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Abstract

The invention provides an image brightness statistical method and imaging equipment, and relates to the technical field of image processing. The method comprises the following steps: obtaining the bitwidth of a pixel value of a to-be-processed image and the maximum bearable bit width of a block random access memory of hardware equipment for brightness histogram statistics; dividing each pixel data of the to-be-processed image into multiple groups of pixel data according to the bit width of the pixel value of the to-be-processed image, so that the bit width of each group of pixel data is lessthan or equal to the maximum bearable bit width; performing brightness histogram statistics according to the pixel data of the same group in the pixel data to obtain a brightness histogram component corresponding to each group; determining a brightness evaluation value component corresponding to each group according to the brightness histogram component corresponding to each group and the pixel number of the to-be-processed image; and determining a brightness evaluation value of the to-be-processed image according to each brightness evaluation value component. According to the invention, brightness statistics can be conveniently carried out on an image with a high bit width to obtain a brightness evaluation value.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to an image brightness statistical method and imaging equipment. Background technique [0002] At present, with the development of intelligent industry, robot obstacle avoidance, real-time positioning and map construction, and unmanned driving technology, cameras are widely used in these fields. Current cameras mainly rely on image sensors to obtain image information, and dynamic range is an important indicator of cameras. At present, image sensors of many manufacturers support multi-level exposure methods to obtain high-dynamic range (High-Dynamic Range, referred to as HDR) Image, the dynamic range of the current HDR image can reach 120db. A higher dynamic range means a stronger ability to obtain image details. Therefore, in order to obtain HDR images, it is necessary to accurately control the exposure time and gain of the image sensor. The premise of controlling the ex...

Claims

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Application Information

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IPC IPC(8): H04N5/235H04N17/00
CPCH04N17/00H04N23/741H04N5/00G06T5/40G06T2207/20208H04N23/70G06T5/92G06T1/20G06T1/60
Inventor 张瑜
Owner BEIJING TUSEN ZHITU TECH CO LTD
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