JP2011015092A5

JP2011015092A5 -

Info

Publication number: JP2011015092A5
Application number: JP2009156326A
Authority: JP
Filing date: 2009-06-30
Publication date: 2012-08-16

Description

上述の課題を解決する本発明の撮像装置は、
被写体を撮像して符号化用の画像を生成する撮像手段と、
前記符号化用の画像に直交変換と量子化とを施して量子化画像を生成する量子化画像生成手段と、
前記量子化画像に逆量子化と逆直交変換とを施して、ローカルデコード画像を生成するローカルデコード画像生成手段と、
前記量子化画像を生成する際の量子化ステップを制御するパラメータを設定する設定手段と、
表示手段とを備え、
前記設定手段は、前記符号化用の画像を複数の領域に分割して、前記領域毎に異なる画質モードに対応したパラメータを設定し、
前記表示手段は、領域毎に設定されたパラメータを用いて生成された量子化画像から生成された前記ローカルデコード画像を表示する
ことを特徴とする。 The imaging device of the present invention that solves the above-described problems is
Imaging means for generating an image for encoding by the image shooting of the subject,
A quantized image generating means for generating a quantized image by performing orthogonal transformation and quantization on the image for encoding;
Local decoded image generation means for generating a local decoded image by performing inverse quantization and inverse orthogonal transformation on the quantized image;
A setting means for setting a parameter for controlling a quantization step when generating the quantized image;
Display means,
The setting means, wherein the image for encoding is divided into a plurality of areas, set the parameters corresponding to different image quality mode for each of the areas,
The display means displays the local decoded image generated from a quantized image generated using a parameter set for each region.

Claims

Imaging means for generating an image for encoding by the image shooting of the subject,
A quantized image generating means for generating a quantized image by performing orthogonal transformation and quantization on the image for encoding;
Local decoded image generation means for generating a local decoded image by performing inverse quantization and inverse orthogonal transformation on the quantized image;
A setting means for setting a parameter for controlling a quantization step when generating the quantized image;
Display means,
The setting means, wherein the image for encoding is divided into a plurality of areas, set the parameters corresponding to different image quality mode for each of the areas,
The image display apparatus, wherein the display unit displays the local decoded image generated from a quantized image generated using a parameter set for each region.

The display means displays the local decoded image so as to be selectable for each different area of the parameter,
The imaging apparatus further includes selection accepting means for accepting selection of any region in the local decoded image from a user,
The setting unit sets the parameter corresponding to the area in which the selection receiving unit has received a selection,
The imaging apparatus according to claim 1, wherein the quantized image generating unit generates the quantized image using the set parameter.

Encoding means for entropy encoding the quantized image;
The quantized image generated by the quantized image generating unit using the parameter set corresponding to the region for which the selection has been received is entropy-encoded by the encoding unit, and is attached to or detached from the imaging device. Stored in a recording medium that can be mounted,
The quantized image generated by the quantized image generating unit using different parameters for each region in order to receive the selection of the region by the selection receiving unit is not entropy encoded by the encoding unit, and The imaging apparatus according to claim 2, wherein the imaging apparatus is not stored in the recording medium.

It further comprises an operation means for accepting an operation from the user,
The operation means accepts designation of an area to be enlarged in the local decoded image displayed by the display means,
The setting means, the area specified as an area for the expansion, and re-dividing the image for the encoding to be almost equally divided into a plurality of regions, corresponding to the different image quality mode for each of the areas Reset the parameters,
The display means enlarges and displays an image of a region designated as the region to be enlarged among the local decoded images generated from the quantized image generated using the parameters reset for each region. The image pickup apparatus according to claim 1, wherein the image pickup apparatus is an image pickup apparatus.

It further comprises an operation means for accepting an operation from the user,
The operation means receives an instruction to enlarge and display the local decoded image displayed by the display means;
The setting means, a predetermined region in the local decoded image for the enlarged display is to subdivide the image for the encoding to be almost equally divided into a plurality of regions, different quality for each of the areas Reset the parameters corresponding to the mode ,
The display means enlarges and displays an image of the predetermined region among the local decoded images generated from quantization generated using parameters reset for each region. Item 4. The imaging device according to any one of Items 1 to 3.

Further comprising face detection means for detecting the position of a human face included in the encoding image;
When the face detection unit detects the position of the face, the setting unit converts the image for encoding into a plurality of regions so that the region including the face is divided approximately evenly according to the position of the face. subdivision to, reconfigure parameters corresponding to different image quality mode for each of the areas, the
The display means enlarges and displays an image of a region including the face among the local decoded images generated from a quantized image generated using parameters reset for each region. The imaging device according to any one of claims 1 to 5.

Further comprising designation means for designating a position of a human face included in the image for encoding,
When the position of the face is specified by the specifying unit, the setting unit sets the image for encoding to a plurality of regions so that a region including the face is divided approximately evenly according to the position of the face. subdivision to, reconfigure parameters corresponding to different image quality mode for each of the areas, the
The display means enlarges and displays an image of a region including the face among the local decoded images generated from a quantized image generated using parameters reset for each region. The imaging device according to any one of claims 1 to 5.

The imaging apparatus according to claim 1, wherein the setting unit divides the image for encoding in a horizontal scanning direction or a vertical scanning direction.

Imaging means for generating an image for encoding by the image shooting of the subject,
A quantized image generating means for generating a quantized image by performing orthogonal transformation and quantization on the image for encoding;
Local decoded image generation means for generating a local decoded image by performing inverse quantization and inverse orthogonal transformation on the quantized image;
A setting means for setting a parameter for controlling a quantization step when generating the quantized image;
An image pickup apparatus control method comprising display means,
A step wherein the setting means, which divides the image for the encoding into a plurality of areas, setting a parameter corresponding to a different image quality mode for each of the areas,
And a step of displaying the local decoded image generated from a quantized image generated using a parameter set for each region.

A computer program for causing a computer to function as each unit of the imaging apparatus according to any one of claims 1 to 8.