IMAGE ENCODING DEVICE, IMAGING DEVICE, CONTROL METHOD OF IMAGE ENCODING DEVICE, AND PROGRAM
To provide an image encoding device, an imaging device, a control method of the image encoding device, and a program for achieving both high efficiency compression and flicker reduction in RAW image recording.SOLUTION: An image encoding device includes: conversion means for frequency-converting RAW...
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Main Author | |
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Format | Patent |
Language | English Japanese |
Published |
15.07.2021
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Subjects | |
Online Access | Get full text |
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Summary: | To provide an image encoding device, an imaging device, a control method of the image encoding device, and a program for achieving both high efficiency compression and flicker reduction in RAW image recording.SOLUTION: An image encoding device includes: conversion means for frequency-converting RAW image data to generate sub-band data of a plurality of sub-bands; quantization means for performing quantization processing for the sub-band data; encoding means for encoding the sub-band data quantized by the quantization means; and control means for controlling the quantization processing in the quantization means. The control means sets a quantization coefficient for quantizing the sub-band of a high-frequency component in a case where a photographing mode is a moving picture photographing mode larger than a quantization coefficient in a case where the photographing mode is a still picture photographing mode.SELECTED DRAWING: Figure 2
【課題】RAW画像記録において高効率圧縮とフリッカ低減とを両立させる画像符号化装置、撮像装置、画像符号化装置の制御方法及びプログラムを提供する。【解決手段】画像符号化装置は、RAW画像データを周波数変換し、複数のサブバンドのサブバンドデータを生成する変換手段と、サブバンドデータを量子化処理する量子化手段と、量子化手段により量子化されたサブバンドデータを符号化する符号化手段と、量子化手段における量子化処理を制御する制御手段とを備える。制御手段は、撮影モードが動画撮影である場合の高周波成分のサブバンドを量子化するための量子化係数を、撮影モードが静止画撮影である場合の量子化係数よりも大きくする。【選択図】図2 |
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Bibliography: | Application Number: JP20190233386 |