JP2005295424A - Image coding apparatus, image coding control method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform still image encoding processing capable of ensuring efficient transmission and accumulation of encoded still image data in an image encoding apparatus that performs moving image encoding and still image encoding of image data. An image encoding device is provided.
A moving image encoding unit 103 that generates encoded moving image data and motion information by encoding image data corresponding to a captured image from an imaging unit 101, and a still image code according to the parameters. A still image encoding unit 104 that generates encoded still image data and controls the parameters to be used by the still image encoding unit 104 based on motion information obtained by the moving image encoding unit 103 The parameter control unit 106 is included.
[Selection] Figure 1

Description

  The present invention relates to an image encoding device used in a monitoring system or the like, and more specifically, an image in which encoded moving image data and encoded still image data are generated from image data corresponding to a captured image from a capturing unit. The present invention relates to an encoding device.

  2. Description of the Related Art Conventionally, an image encoding device that generates encoded moving image data and encoded still image data from image data corresponding to a captured image from a capturing unit that captures a monitoring area is provided, and the encoded moving image is generated from the image encoding device. A monitoring system that transmits image data and encoded still image data to a monitor device has been proposed (see, for example, Patent Document 1). In such a monitoring system, the image encoding device generates a moving image encoding unit that generates encoded moving image data from image data corresponding to a captured image from the imaging unit, and generates encoded still image data from the image data. A still image encoding unit. The image encoding device normally transmits the moving image encoded data generated by the moving image encoding unit to the monitor device, and the monitor device displays the moving image in the monitoring area based on the encoded moving image data. An image is displayed. In this state, if any change occurs in the displayed moving image, the image encoding device transmits the encoded still image data in response to a request from the monitor device side, and sends it to the monitor device. Thus, the still image of the monitoring area is displayed together with the moving image.

According to such a monitoring system, the encoded moving image data and the encoded still image data are generated by the video encoding unit and the still image encoding unit which are independent in the image encoding device. Thus, it is possible to obtain a moving image and a still image with good image quality.
JP 2000-184367 A

  However, in the image coding apparatus used in the conventional monitoring system as described above, in order to keep the quality of the reproduced still image high, the degree of still image coding on the image data (for example, depending on the coding rate or the like). Cannot be made so large. Therefore, the information amount of the encoded still image data obtained by the still image encoding process is relatively large. In the reproduced still image, considering that it is sufficient that the moving portion in the captured image, that is, the portion of particular interest in monitoring is maintained at high image quality, still image encoding in a conventional image encoding device is sufficient. This process cannot always ensure efficient transmission and storage of encoded still image data.

  The present invention has been made to solve the above-described problems of the conventional image encoding device. In an image encoding device that performs moving image encoding and still image encoding of image data, encoded still image data is provided. It is an object of the present invention to provide an image encoding apparatus that can perform still image encoding processing that can ensure efficient transmission and storage of images.

  An image encoding apparatus according to the present invention includes moving image encoding means for encoding image data to generate encoded moving image data and motion information, and encoding the still image by encoding the image data according to a parameter. A configuration having still image encoding means for generating image data, and parameter control means for controlling parameters to be used in the still image encoding means based on motion information obtained by the moving image encoding means; Become.

  With such a configuration, a parameter to be used when image data is encoded as a still image is controlled according to the state of motion of the captured image. This makes it possible to control the degree of still image encoding for image data in accordance with the state of motion in the captured image.

  The parameters are not particularly limited as long as they are used for still image encoding processing of image data, and the parameter control means controls all parameters used for the still image encoding processing. Alternatively, some parameters may be controlled.

  The image data may be obtained when an area is imaged by an imaging means such as a camera, or may be artificially generated such as a CG image or an animation image.

  In the image encoding device according to the present invention, the parameter control means includes area dividing means for dividing the area of the image data into a plurality of partial areas based on the motion information. The parameter can be controlled for each image data portion corresponding to each of the obtained partial regions.

  With such a configuration, the parameters used for encoding the still image are controlled for each image data portion corresponding to each of the plurality of partial regions having different motion states in the captured image. This makes it possible to control the degree of still image encoding for the image data portion for each of the plurality of partial regions.

  Furthermore, the image coding apparatus according to the present invention may be configured such that the region segmenting unit segments the region of the image data into a target partial region in which the motion information satisfies a predetermined condition and another region. .

  With such a configuration, it is possible to perform still image coding according to different parameters for image data portions corresponding to a target partial region in which a motion state is in a predetermined state and another region. This makes it possible to change the degree of still image encoding for the image data portion for each of the target partial region and other regions. For example, it is possible to change the degree of still image encoding for the image data portion of the target partial region and each of the other regions so that the image quality of the target partial region in the reproduced still image is higher than the image quality of the other regions. become.

  The predetermined condition can be arbitrarily set based on functions, performance, and the like required for a system in which the image encoding apparatus is used. For example, when the image encoding device is used in a monitoring system, the predetermined condition can be set based on the degree of image motion that can be considered to have occurred.

  An image encoding apparatus according to the present invention includes: first converted image data to be encoded as a moving image by changing the resolution of image data; and second converted image data to be encoded as a still image by changing the resolution of the image data. A resolution converting unit for generating, a moving image encoding unit for encoding the first converted image data to generate encoded moving image data and motion information, and encoding the second converted image data by encoding according to the parameters. A still image encoding means for generating the converted still image data, the motion information obtained by the moving image encoding means, the resolution of the first converted image data, and the resolution of the second converted image data And a parameter control unit that controls a parameter to be used in the still image encoding unit.

  With such a configuration, the parameter to be used when the second converted image data provided from the resolution conversion unit corresponding to the image data is encoded as the still image is encoded from the resolution conversion unit corresponding to the image data. Control is performed according to the motion information of the image obtained when the first converted image data to be provided is encoded as a moving image, the resolution of the first converted image data, and the resolution of the second converted image data. It becomes. As a result, even if the resolution of the second converted image data to be encoded with the still image is different from the resolution of the first converted image data to be encoded with the moving image, the second conversion is performed according to the state of motion in the image data. The degree of still image encoding for the converted image data can be accurately controlled.

  Further, in the image encoding device according to the present invention, the parameter control means determines the region of the captured image based on the motion information, the resolution of the first converted image data, and the resolution of the second converted image data. It is possible to have a configuration in which area classification means for dividing into a plurality of partial areas is provided, and the parameters are controlled differently for each image data portion corresponding to each of the plurality of partial areas obtained by the area division means. it can.

  With such a configuration, when the still image is encoded for each portion of the second converted image data corresponding to each of the plurality of partial regions having different motion states in the moving image corresponding to the first converted image data. The parameters used will be controlled. This makes it possible to accurately control the degree of still image encoding for the second converted image data portion for each of the plurality of partial regions.

  Furthermore, the image coding apparatus according to the present invention may be configured such that the region segmenting unit segments the region of the image data into a target partial region in which the motion information satisfies a predetermined condition and another region. .

  With such a configuration, it is possible to perform still image coding according to different parameters for the target partial region where the state of motion is in a predetermined state in the image data and the portion of the second converted image data for each of the other regions. Become. As a result, it is possible to accurately control the degree of still image coding for the portion of the second converted image data for each of the target partial region and other regions.

  In the image encoding device according to the present invention, the area dividing means includes a temporary area dividing means for dividing the area of the image data into a plurality of temporary partial areas based on the motion information, and the temporary area dividing means. And a partial area correction unit that corrects each temporary partial area obtained in accordance with the resolution of the first converted image data and the resolution of the second converted image and sets the partial area. Can do.

  With such a configuration, the area of the image data is divided into a plurality of temporary partial areas based on the motion information obtained when the first converted image data is encoded as a moving image, and further, the first converted image data Each temporary partial area is corrected based on the resolution and the resolution of the second converted image to be encoded, and a partial image area is set. As a result, even if the resolution of the first converted image data to be encoded with the moving image is different from the resolution of the second converted image to be encoded with the still image, the captured image represented by the second converted image data is displayed. The region can be divided into a plurality of partial regions according to the state of motion of the captured image.

  An image encoding apparatus according to the present invention includes moving image encoding means for encoding image data to generate encoded moving image data and motion information, and encoding the still image by encoding the image data according to a parameter. Still image encoding means for generating image data, imaging condition acquisition means for acquiring imaging conditions of the image data, motion information obtained by the moving image encoding means and changes in the imaging conditions And a parameter control unit that controls a parameter to be used in the image encoding unit.

  With such a configuration, the parameters to be used when image data is encoded as a still image are controlled in accordance with the moving state of the moving image based on the moving image encoded data and the change in the shooting condition of the image data. The Rukoto. As a result, even when the shooting conditions change, the degree of still image encoding for the image data can be controlled according to the movement in the image data.

  The shooting conditions for the image data are conditions that affect the image data when the image data is acquired. For example, if the image data is acquired by the shooting means, the shooting conditions are obtained by the shooting means. The image data is not particularly limited as long as it affects the image data to be captured, and may include, for example, conditions related to the posture of the photographing unit such as pan and tilt, zoom magnification, and linear movement of the photographing range.

  Further, the image encoding device according to the present invention has an area dividing means for dividing the area of the image data into a plurality of partial areas on the basis of the motion information and the change of the photographing condition. The parameter may be controlled to be different for each image data portion corresponding to each of the plurality of partial regions obtained by the region sorting means.

  With such a configuration, parameters used for encoding still images for each image data portion corresponding to each of a plurality of partial regions having different motion states in a moving image while taking into account changes in image data shooting conditions Will be controlled. This makes it possible to more accurately control the degree of still image encoding for the image data portion for each of the plurality of partial regions.

  Furthermore, the image coding apparatus according to the present invention may be configured such that the region segmenting unit segments the region of the image data into a target partial region in which the motion information satisfies a predetermined condition and another region. .

  With such a configuration, the image data portions corresponding to the region of interest and the other region in which the motion state is in a predetermined state in the image data are considered according to different parameters while taking into account the change in the shooting conditions of the image data. It is possible to encode still images. As a result, it is possible to more accurately control the degree of still image encoding for the image data portion for the target partial region and other regions.

  Further, the image encoding apparatus according to the present invention includes a motion information correcting unit in which the region dividing unit corrects the motion information from the moving image encoding unit based on a change in the shooting condition to generate corrected motion information. The area of the image data can be divided into a plurality of partial areas based on the corrected motion information.

  With such a configuration, even if a change in the shooting condition of the image data affects the moving image, the motion information obtained in the course of the moving image encoding process is corrected based on the change in the shooting condition. The corrected motion information (corrected motion information) can be obtained by removing the influence of the change in the photographing condition. As a result, the area of the captured image can be divided into a plurality of partial areas in a state where the influence of the change in the imaging condition of the image data is removed.

  An image encoding apparatus according to the present invention includes moving image encoding means for encoding image data to generate encoded moving image data and motion information, and encoding still images by encoding input image data according to parameters. Still image encoding means for generating image data, image cutout means for cutting out cutout image data of an image that becomes a part of the image data, and supplying the extracted image data to the still image encoding means, and the moving image encoding And a cutout control unit that determines an image portion of the image data to be cut out by the image cutout unit based on the motion information obtained by the unit.

  With such a configuration, still image coding is performed on the cut-out image data cut out from the image data based on the motion state of the moving image based on the encoded moving image data. As a result, still image encoded data of the extracted image portion can be obtained.

  The aspect of extracting the image portion based on the motion information can be arbitrarily determined based on functions, specifications, and the like required for a system to which the image encoding device is applied. For example, when an image encoding device is used in a monitoring system, it is possible to cut out image data of an image portion from which motion information corresponding to the motion of an image that can be regarded as having an abnormality has been obtained. In this case, encoded still image data for an image portion that can be regarded as having an abnormality is obtained.

  Further, in the image encoding device according to the present invention, the clipping control unit is configured to extract the focused partial area among the focused partial area and the other areas in which the motion information satisfies a predetermined condition in the image data area. It can be set as the structure determined as an image part of the image data which should be cut out by a means.

  With such a configuration, an image data portion corresponding to a target partial region whose motion information satisfies a predetermined condition is encoded as a still image, and encoded still image data for the target partial region is obtained.

  As described above, the predetermined condition can be arbitrarily set based on functions, performance, and the like required for a system in which the image encoding apparatus is used. For example, when the image encoding device is used in a monitoring system, the predetermined condition can be set based on the degree of image motion that can be considered to have occurred.

  Furthermore, the image coding apparatus according to the present invention can be configured to have parameter determining means for determining parameters used in the still image coding means.

  With such a configuration, it is possible to arbitrarily set parameters used when the input image data corresponding to the target partial region is encoded as a still image, and a still image corresponding to the image data portion of the target partial region. The degree of encoding can be arbitrarily set.

  An image encoding method according to the present invention includes a moving image encoding step for encoding image data to generate encoded moving image data and motion information, and encoding the still image by encoding the image data according to a parameter. A configuration having a still image encoding step for generating image data, and a parameter control step for controlling a parameter to be used in the still image encoding step based on motion information obtained in the moving image encoding step; Become.

  With such a configuration, a parameter to be used when image data is encoded as a still image is controlled according to a moving state of a moving image based on the moving image encoded data.

  In the image coding method according to the present invention, the parameter control step includes a region partitioning step of partitioning the region of the image data into a plurality of partial regions based on the motion information, and the region partitioning means The parameter can be controlled for each image data portion corresponding to each of the obtained partial regions.

  According to such a configuration, the parameters used for encoding the still image are controlled for each image data portion corresponding to each of the plurality of partial regions having different motion states in the moving image.

  An image encoding method according to the present invention includes: first converted image data to be encoded as a moving image by changing the resolution of the image data; second converted image data to be encoded as a still image by changing the resolution of the image data; A resolution conversion step for generating image data, a moving image encoding step for encoding the first converted image data to generate encoded moving image data and motion information, and encoding the second converted image data according to parameters. A still image encoding step for generating encoded still image data; motion information obtained by the moving image encoding means; a resolution of the first converted image data; and a resolution of the second converted image data. And a parameter control step for controlling a parameter to be used by the still image encoding means.

  With such a configuration, the parameter to be used when the second converted image data provided from the resolution conversion unit corresponding to the image data is encoded as the still image is encoded from the resolution conversion unit corresponding to the image data. The motion state of the moving image based on the moving image encoded data obtained by encoding the provided first converted image data, the resolution of the first converted image data, and the resolution of the second converted image data It will be controlled according to.

  Further, in the image coding method according to the present invention, the parameter control step may determine the region of the captured image based on the motion information, the resolution of the first converted image data, and the resolution of the second converted image data. It has a region dividing step for dividing into a plurality of partial regions, and the parameter is controlled to be different for each image data portion corresponding to each of the plurality of partial regions obtained in the region dividing step. it can.

  With such a configuration, when the still image is encoded for each portion of the second converted image data corresponding to each of the plurality of partial regions having different motion states in the moving image corresponding to the first converted image data. The parameters used will be controlled.

  An image encoding method according to the present invention includes a moving image encoding step of encoding image data to generate encoded moving image data and motion information, and encoding the image data according to a set parameter. Based on a still image encoding step for generating encoded still image data, a shooting condition acquisition step for acquiring shooting conditions for the image data, motion information obtained in the moving image encoding step, and changes in the shooting conditions And a parameter control step for controlling parameters to be used in the still image encoding step.

  With such a configuration, the parameters to be used when encoding the image data with the still image are controlled according to the moving state of the moving image based on the moving image encoded data and the change of the shooting condition in the shooting unit. The Rukoto.

  In the image encoding method according to the present invention, the parameter control step includes a region dividing step of dividing the region of the image data into a plurality of partial regions based on the motion information and the change in the photographing condition. The parameter may be controlled to be different for each image data portion corresponding to each of the plurality of partial regions obtained in the region dividing step.

  With such a configuration, parameters used for encoding still images for each image data portion corresponding to each of a plurality of partial regions having different motion states in a moving image while taking into account changes in image data shooting conditions Will be controlled.

  The image encoding method according to the present invention includes a moving image encoding step for encoding image data to generate encoded moving image data and motion information, and encoding the still image by encoding the input image data according to the parameters. A still image encoding step of generating image data, an image extraction step of cutting out image data of an image that becomes a part of the image data and providing the image data as the input image data to the still image encoding means, and the moving image encoding A cutout control step for determining an image portion of the image data to be cut out in the image cutout step based on the motion information obtained in the step.

  With such a configuration, still image coding is performed on the image data of the image portion cut out from the captured image based on the state of motion of the image. Thereby, the encoded still image data of the clipped image portion can be obtained.

  Further, in the image coding method according to the present invention, the clipping control step includes extracting the focused partial area from the focused partial area and the other areas where the motion information satisfies a predetermined condition in the image data area. It can be set as the structure determined as an image part of the image data which should be cut out by a means.

  With such a configuration, an image data portion corresponding to a target partial region whose motion information satisfies a predetermined condition is encoded as a still image, and encoded still image data for the target partial region is obtained.

  The program according to the present invention includes a step of acquiring the motion information from a moving image encoding unit that encodes image data to generate encoded moving image data and motion information, and a still image encoding unit includes the image data The computer is configured to execute a parameter control step for controlling a parameter used when generating still image data by encoding a still image based on the motion information.

  With such a configuration, the computer can control parameters to be used when image data is encoded as a still image according to the state of motion of the image data.

  In the program according to the present invention, the parameter control step includes an area dividing step of dividing the area of the image data into a plurality of partial areas based on the motion information, and is obtained in the area dividing step. The parameter is controlled for each image data portion corresponding to each of the plurality of partial regions.

  With such a configuration, the computer can control parameters used for still image encoding for each image data portion corresponding to each of a plurality of partial regions having different motion states in the image data. Become.

  The program according to the present invention generates first converted image data to be encoded as a moving image by changing the resolution of the image data, and second converted image data to be encoded as a still image by changing the resolution of the image data. Obtaining the motion information from moving image encoding means for encoding the first converted image data provided from the resolution conversion means to generate an encoded moving image and motion information; and Obtaining a resolution of the converted image data and a resolution of the second converted image; and a still image code based on the motion information, the resolution of the first converted image data, and the resolution of the second converted image data The computer is configured to cause the computer to execute a parameter control step for controlling parameters when the second converted image data is encoded as a still image.

  With such a configuration, the computer sets the parameters to be used when the second converted image data provided from the resolution conversion unit corresponding to the image data is encoded as a still image to the resolution corresponding to the image data. Control may be performed according to the state of motion obtained by encoding the first converted image data provided from the conversion means, the resolution of the first converted image data, and the resolution of the second converted image data. become able to.

  In the program according to the present invention, the parameter control step may include a plurality of portions of the captured image based on the motion information, the resolution of the first converted image data, and the resolution of the second converted image data. It has a region partitioning step for partitioning into regions, and the parameters are controlled to be different for each image data portion corresponding to each of the plurality of partial regions obtained in the region partitioning step. it can.

  With such a configuration, the computer can perform still image encoding for each portion of the second converted image data corresponding to each of the plurality of partial regions having different motion states in the image corresponding to the first converted image data. It is possible to control parameters used in the process.

  The program according to the present invention acquires the motion information from a moving image encoding means that generates encoded video data and motion information by encoding video data, and acquires a shooting condition of the image data. A shooting condition acquisition step;

  A parameter control step for controlling a parameter used when the still image encoding means encodes the image data to generate encoded still image data based on the motion information and the change in the shooting condition; The configuration is to be executed.

  With such a configuration, the computer can control the parameters to be used when encoding still image data of image data in accordance with the state of motion of the image and the change of shooting conditions in the shooting means. .

  In the program according to the present invention, the parameter control step may include a region partitioning step of partitioning the region of the image data into a plurality of partial regions based on the motion information and the change in the shooting condition. The parameter can be controlled to be different for each image data portion corresponding to each of the plurality of partial regions obtained in the step.

  With such a configuration, the computer is used for encoding a still image for each image data portion corresponding to each of a plurality of partial regions having different motion states in the image while taking into account changes in the image data shooting conditions. Parameters can be controlled.

  The program according to the present invention includes a step of acquiring the motion information from a moving image encoding means for generating image data and motion information by encoding image data as a motion image, and a still image code according to the input image data as a parameter. An image to be cut out by an image cut-out means that cuts out image data that is part of the image data and gives it as the input image data to a still image coding means that generates encoded still image data And determining the image portion of the data based on the motion information.

  With such a configuration, the computer can cause the still image encoding means to encode the image data of the image portion cut out from the area of the image data based on the state of the image movement. Become.

  Further, in the program according to the present invention, the cutout control step includes the step of cutting out the target partial region of the region of the image data in which the motion information satisfies a predetermined condition and the target partial region among other regions by the image extraction unit. It can be set as the structure determined as an image part of the image data which should be cut out.

  With such a configuration, the computer can encode the image data portion corresponding to the target partial region in which the motion information satisfies the predetermined condition.

  According to the image encoding device of the present invention, the parameters to be used when encoding the image data in the still image are controlled according to the state of the image data movement. The degree of still image encoding for the image data can be controlled according to the state of the image. For this reason, in an image encoding apparatus that performs moving image encoding and still image encoding of image data, it is possible to ensure efficient transmission and accumulation of encoded still image data.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The image coding apparatus according to the first embodiment of the present invention is configured as shown in FIG.

  In FIG. 1, an image encoding device 10 inputs image data corresponding to a captured image from the image capturing unit 101, and generates moving image encoded data generated from the image data and a still image code generated from the image data. For example, the digitized data is transmitted to the receiving unit 108 provided in the monitor device via the communication line 107. The image capturing unit 101 includes an image sensor including a CCD or CMOS sensor and an A / D converter that converts a signal corresponding to a captured image output from the image sensor into digital image data.

  The image encoding device 10 includes an image input unit 102, a moving image encoding unit 103, a still image encoding unit 104, a transmission unit 105, and a control unit 106. The image input unit 102 includes a buffer such as a RAM. The image input unit 102 captures image data from the photographing unit 101 and supplies the image data to the moving image encoding unit 103 and the still image encoding unit 104. The moving image coding unit 103 performs moving image coding (for example, MPEG coding) on the image data supplied from the image input unit 102, and motion information obtained upon the moving image coding. Is output. The motion information is information representing temporal changes in the captured image and information obtained in the process of video encoding, and changes in the luminance value (pixel value) of each pixel constituting the motion vector information and image data. Information regarding the quantity, information regarding the data size of the encoded data, information regarding intra encoding or inter encoding may be included. The still image encoding unit 104 performs still image encoding (for example, JPEG encoding) on the image data supplied from the image input unit 102 according to the set parameters, and outputs encoded still image data. The transmission unit 105 is provided in, for example, a monitor device via the wireless or wired communication line 107 with the encoded moving image data from the moving image encoding unit 103 and the encoded still image data from the still image encoding unit 104. It transmits to the receiving part 108.

  The control unit 106 includes a CPU, a ROM, a RAM, and the like, and the still image encoding in the still image encoding unit 104 is performed based on the motion information from the moving image encoding unit 103 by the operation of the CPU according to the program. Control processing. The control unit 106 manages information related to the format of image data to be supplied from the image input unit 102 to the moving image encoding unit 103 and the still image encoding unit 104, and controls data transmission in the transmission unit 105. To do.

  The image encoding apparatus configured as described above operates as follows.

  The imaging unit 101 performs imaging of a predetermined area and outputs image data corresponding to the captured image. In this state, the image input unit 102 inputs the image data from the photographing unit 101 and sequentially supplies the image data to the moving image encoding unit 103 and the still image encoding unit 104. Under the control of the control unit 106, the moving image encoding unit 103 encodes the image data sequentially supplied from the image input unit 102, supplies the encoded moving image data to the transmission unit 105, and the moving image. The motion information obtained in the encoding process is supplied to the control unit 106. The still image encoding unit 104 encodes the image data sequentially supplied from the image input unit 102 under the control of the control unit 106 and supplies the encoded still image data to the transmission unit 105. Then, the transmission unit 105 transmits the encoded moving image data and the encoded still image data to the reception unit 108 via the communication line 107.

  In the operation process of the image coding apparatus as described above, the control unit 106 performs processing according to the procedure shown in FIG. This process is performed by the CPU executing a program corresponding to the procedure shown in FIG.

  In FIG. 2, the control unit 106 is in a waiting state for a transmission instruction from, for example, the monitor apparatus provided with the receiving unit 108 (S101). In this state, when receiving the transmission instruction (YES in S101), the control unit 106 causes the moving image coding unit 103 to start moving image coding processing of image data (S102). Thereby, the moving image encoding unit 103 encodes the image data corresponding to the captured image supplied from the image input unit 101 as a moving image. Then, when the control unit 106 acquires the motion information generated in the course of the video encoding process from the video encoding unit 103 (S103), the control unit 106 selects the image input unit 102 based on the motion information. A target partial region is specified in the region of the captured image represented by the image data from and the target partial region is distinguished from other regions (S104). For example, a partial area in which an image motion that can be considered to have occurred is distinguished from other areas as the target partial area.

  The distinction between the target partial region and other regions can be performed as follows.

  When vector information is used as motion information, a vector length is acquired from the vector information of each block in one screen, and the block that becomes a target partial region based on whether the vector length is equal to or greater than a predetermined reference value Are distinguished from other blocks. In this case, for example, a block having a vector length equal to or greater than the predetermined reference value can be specified as the target partial region.

  When the distribution of the horizontal and vertical components of the vector information is used as motion information, the block serving as the target partial region and other blocks based on whether or not the vector information (horizontal component, vertical component) is in a predetermined direction Can be distinguished. In this case, for example, the block of the image portion that moves to the right can be specified as the target partial region.

  In addition, for example, adjacent blocks having vector information pointing in the same or similar direction are considered as connected blocks, and the average values of horizontal and vertical components, average values of lengths, and connected block areas of the vector information of the connected blocks, respectively. The target partial region can be specified based on (the number of contained blocks) or the shape of the connected block.

  In addition, when the change amount of the average value of the pixel value (luminance value) of each block in one screen is used as motion information, the change amount of the average value of the pixel value is equal to or greater than a predetermined reference value. Based on how, a block that becomes a target partial region and a block that becomes another region are distinguished. In this case, for example, a block in which the change amount of the average value of the pixel values is equal to or greater than the predetermined reference value can be specified as the target partial region.

  Furthermore, when the amount of encoded moving image data of each block in one screen is used as motion information, the partial region of interest is based on whether the amount of encoded moving image data is greater than or equal to a predetermined reference value. Are distinguished from other blocks. In this case, for example, a block in which the amount of the encoded moving image data is greater than or equal to the predetermined reference value can be specified as the target partial region.

  In addition, when information on intra coding and inter coding is used as motion information, the number of blocks that are inter-coded in the moving picture coding and the number of blocks that are intra-coded are acquired for each unit region in the image, Based on whether the ratio of the number of intra-encoded blocks to the number of inter-encoded blocks is greater than or equal to a predetermined reference value, a unit region that is a target partial region and a unit region that is another region Differentiated. In this case, for example, a unit region in which the ratio of the number of intra-encoded blocks to the number of inter-encoded blocks is equal to or greater than the predetermined reference value can be specified as the target partial region.

  Furthermore, when adjacent blocks have the same motion information (intra coding or inter coding), it can be considered as a connected block, and the target partial region can be specified by the area (number of contained blocks) and shape of each connected block ( Or, it can be specified that it is not a partial area of interest).

  As described above, when the region of the captured image represented by the image data from the image input unit 102 is distinguished into the target partial region and other regions based on the motion information, the control unit 106 displays a still image encoding unit. The parameter to be set to 104 is determined (S105). In this process, parameters for the identified target partial image region and other regions, for example, an image compression rate, a quantization parameter, the presence / absence of a low-pass filter, the strength of the filter characteristics, and the like are set. The value of each parameter is set for each region so that a relatively high-quality restored still image can be obtained for the target partial image region, and the data amount can be reduced for the other regions.

  Then, the control unit 106 supplies the parameters determined for the target partial region and the parameters determined for the other regions to the still image encoding unit 104, and starts still image encoding processing of image data in the still image encoding unit 104. (S106). As a result, the still image encoding unit 104 encodes the image data portion corresponding to the target partial region in the image data from the image input unit 102 according to the parameters determined for the target partial region, The image data portion corresponding to the area is encoded according to the parameters determined for the area. Then, the still image encoding unit 104 outputs encoded still image data generated by the encoding.

  After setting the parameters for the still image encoding unit 104, the control unit 106 determines whether or not the transmission instruction from the monitor device side is continued (S107), and while the transmission instruction is continued (YES in S107), the above-described processing (S102 to S106) is repeatedly executed.

  According to such an image encoding device, for example, in a captured image, for example, an image data portion corresponding to a target partial region in which a motion of an image that can be regarded as an abnormality has occurred is restored with a relatively high image quality. Still image coding is performed in accordance with parameters for obtaining an image, and for image data portions corresponding to other regions, a parameter that reduces the data amount by increasing the degree of coding (for example, coding rate). Accordingly, still image coding is performed. Therefore, it is possible to perform still image coding that ensures efficient transmission and accumulation of still image encoded data while maintaining high image quality of a restored still image for a necessary area.

  In the processing described above, the target partial area is specified for each screen. However, the target partial area may be specified for each predetermined area unit in one screen.

  Further, the above-described processing in the control unit 106 (see FIG. 2) is performed in accordance with an instruction from the monitor device side provided with the receiving unit 108, for example, but the control unit 106 actively performs it regardless of the instruction. May be. In this case, the image encoding device 10 actively transmits the encoded moving image data and the encoded still image data to the receiving unit 108.

  Next, a second embodiment of the present invention will be described. In the second embodiment, the resolution of the image data corresponding to the captured image provided to the moving image encoding unit 103 is different from the resolution of the image data provided to the still image encoding unit 104. Different from the first embodiment described above.

  The image coding apparatus according to the second embodiment of the present invention is configured as shown in FIG. In FIG. 3, the same reference numerals are given to the same parts as those shown in FIG.

  In FIG. 3, the image encoding device 10 is similar to the case of the first embodiment (see FIG. 1) in that an image input unit 102, a moving image encoding unit 103, a still image encoding unit 104, and a transmission unit 105. In addition to the above, unlike the control unit 106 in the first embodiment described above, a resolution conversion unit 201 and a control unit 202 that can control the resolution conversion unit 201 are provided. The resolution conversion unit 201 includes a buffer such as a RAM, sequentially captures image data from the image input unit 102, converts the resolution of the image data to a resolution for moving images, and outputs first converted image data and the image. The resolution of the data is converted into a still image resolution, and second converted image data is output. The moving image encoding unit 103 generates encoded moving image data by performing moving image encoding on the first converted image data. The still image encoding unit 104 encodes the second converted image data to generate a still image data by encoding the still image. Based on the resolution of the first converted image data, the resolution of the second converted image data, and the motion information supplied from the moving image encoding unit 103, the control unit 202 performs still image encoding in the still image encoding unit 104. The image encoding process is controlled.

  The image encoding apparatus configured as described above operates as follows.

  The resolution conversion unit 201 inputs image data corresponding to the captured image from the image input unit 102, and encodes the first converted image data obtained by converting the resolution of the image data into the resolution for moving images. The second converted image data obtained by converting the resolution of the image data into the still image resolution is supplied to the still image encoding unit 104. Under the control of the control unit 202, the moving image encoding unit 103 encodes the first converted image data and supplies the encoded moving image data to the transmission unit 105, and also performs the moving image encoding process. Is supplied to the control unit 202. Under the control of the control unit 201, the still image encoding unit 104 encodes the second converted image data and supplies the encoded still image to the transmission unit 105. Then, the transmission unit 105 transmits the encoded moving image data and the encoded still image data to the reception unit 108 via the communication line 107.

  In the operation process of the image coding apparatus as described above, the control unit 202 performs processing according to the procedure shown in FIG. This process is performed by the CPU executing a program corresponding to the procedure shown in FIG. In FIG. 4, the same reference numerals are assigned to the processing blocks corresponding to the processing blocks shown in FIG.

  In FIG. 4, for example, the control unit 202 in the waiting state of a transmission instruction from the monitor device side provided with the receiving unit 108 (S101) receives the transmission instruction (YES in S101), the moving image encoding unit 103. Then, the moving image encoding process is started (S102). Accordingly, the moving image encoding unit 103 performs moving image encoding on the first converted image data supplied from the resolution conversion unit 201. The control unit 202 acquires motion information generated in the process in which the moving image encoding unit 103 encodes the first converted image data (S103), and also transmits the first converted image from the resolution converting unit 201. The resolution of the data and the resolution of the second converted image data supplied to the still image conversion unit 104 are acquired (S201). Then, the control unit 202 pays attention in the area of the captured image represented by the second converted image data based on the motion information, the resolution of the first converted image data, and the resolution of the second converted image data. The partial area is specified, and the target partial area is distinguished from other areas (S202). As in the case of the first embodiment described above, for example, a partial area in which an image motion that can be regarded as an abnormality has occurred is distinguished from other areas as a target partial area.

  The distinction between the target partial region and other regions can be performed as follows.

  First, as in the case of the first embodiment described above, a target partial region is specified as a temporary partial region in the region of the captured image represented by the first converted image data based on the motion information. . Thereafter, the temporary partial region is corrected based on the resolution of the first converted image data and the resolution of the second converted image data, and the region of the photographed image represented by the second converted image data A target partial area corresponding to the temporary partial area is specified. Specifically, the number of pixels in the vertical and horizontal directions of the captured image based on the resolution of the first converted image data and the vertical and horizontal directions of the captured image based on the resolution of the second converted image data. The temporary partial area is corrected by enlargement or reduction according to the ratio with the number of pixels of the method, and the target partial area is specified in the area of the captured image represented by the second converted image data.

  In this way, when the target partial region and the other region are distinguished from each other in the captured image represented by the second converted image data, the control unit 202 is the same as in the case of the first embodiment described above. Then, parameters to be set in the still image encoding unit 104 are determined (S105). That is, parameters for each of the segmented target partial region and other regions are set such that a relatively high-quality restored still image is obtained for the target partial region, and the data amount is reduced for the other regions. It is determined.

  Then, the control unit 202 supplies the parameters determined for the target partial region and the parameters determined for the other regions to the still image encoding unit 104, and starts still image encoding processing of image data in the still image encoding unit 104. (S106). As a result, the still image encoding unit 104 encodes the image data portion corresponding to the target partial region in the second converted image data according to the parameters determined for the target partial region, and outputs other regions. The image data portion corresponding to is encoded according to the parameters determined for the region. Then, the still image encoding unit 104 outputs encoded still image data generated by the encoding.

  After setting the parameters for the still image encoding unit 104, the control unit 202 determines whether or not the transmission instruction from the monitor device side is continued (S107), and while the transmission instruction is continued (YES in S107), the above-described processing (S102, S103, S201, S202, S105, S106) is repeatedly executed.

  According to such an image encoding device, even if the resolution of the first converted image data to be encoded with the moving image is different from the resolution of the second converted image data to be encoded with the still image, the moving image An attention part corresponding to a partial area (temporary partial area) identified in the captured image represented by the first converted image data to be encoded, for example, a motion of the image that can be regarded as having an abnormality. The region can be accurately specified in the captured image represented by the second converted image data to be encoded as a still image. As a result, for the second converted image data portion corresponding to the target partial region in which the motion of the image that can be regarded as abnormal has occurred, a still image is obtained according to a parameter that allows a relatively high-quality restored still image to be obtained. For the second converted image data portion that has been encoded and corresponds to another region, still image encoding is performed according to a parameter that increases the degree of encoding (for example, encoding rate) to reduce the amount of information. Will be made. Therefore, it is possible to perform still image coding that ensures efficient transmission and accumulation of still image encoded data while maintaining high image quality of a restored still image for a necessary area.

  In the image coding device according to the second embodiment, the resolution of the first converted image data and the resolution of the second converted image data may be set to be the same. In this case, the processing in the control unit 202 is substantially the same as in the case of the first embodiment described above.

  Further, either one or both of the resolution of the first converted image data and the resolution of the second converted image data may be the same as the resolution of the image data supplied from the image input unit 102. When both the resolutions are the same as the resolution of the image data, the operation of the image encoding device is substantially the same as in the case of the first embodiment described above.

  Next, a third embodiment of the present invention will be described. This third embodiment is the first embodiment described above in that the parameters in the still image encoding process are controlled in consideration of shooting conditions in a shooting unit that outputs image data corresponding to a shot image. Different from form.

  The image coding apparatus according to the third embodiment of the present invention is configured as shown in FIG. In FIG. 5, parts that are the same as the parts shown in FIG. 1 are given the same reference numerals.

  In FIG. 5, the image encoding device 10 includes an image input unit 102, a moving image encoding unit 103, a still image encoding unit 104, and a transmission unit 105, as in the case of the first embodiment (see FIG. 1). In addition to the above, unlike the control unit 106 in the first embodiment described above, a control unit 302 that can perform control based on the imaging conditions in the imaging unit 301 is provided. In the process of outputting image data corresponding to the captured image, the imaging unit 301 can change in the vertical direction and the horizontal direction by the imaging conditions, for example, the turning of the camera (including the imaging device) in the vertical and horizontal directions. The control unit 302 is supplied with conditions regarding the photographing range that can be enlarged and reduced as the camera zooms in and out and conditions regarding brightness, color tone, and the like associated with white balance. The control unit 302 sets the motion information generated when the moving image encoding unit 103 encodes the image data corresponding to the captured image from the image input unit 102 and the change amount of the capturing condition from the capturing unit 301. Based on this, the still image encoding unit 104 controls the still encoding process.

  The image encoding apparatus configured as described above operates as follows.

  The imaging unit 301 supplies information about the imaging conditions to the control unit 302 in the process of sequentially supplying image data corresponding to the captured image to the image input unit 102. Under the control of the control unit 302, the moving image encoding unit 103 encodes the image data corresponding to the captured image from the image input unit 102 and supplies the encoded moving image data to the transmission unit 105. The motion information obtained in the moving image coding process is supplied to the control unit 302. The still image encoding unit 104 encodes the image data and supplies the encoded still image data to the transmission unit 105 under the control of the control unit 302. Then, the transmission unit 105 transmits the encoded moving image data and the encoded still image data to the reception unit 108 via the communication line 107.

  In the operation process of the image encoding apparatus as described above, the control unit 302 performs processing according to the procedure shown in FIG. This process is performed by the CPU executing a program corresponding to the procedure shown in FIG. In FIG. 6, the same reference numerals are assigned to the processing blocks corresponding to the processing blocks shown in FIG.

  In FIG. 6, for example, the control unit 302 that is in a waiting state for a transmission instruction from the monitoring apparatus side provided with the receiving unit 108 (S 101) receives the transmission instruction (YES in S 102), the moving image encoding unit 103. Then, the moving image encoding process is started (S102). Thus, the moving image encoding unit 103 encodes the image data corresponding to the captured image from the image input unit 102 as a moving image. The control unit 302 acquires motion information generated by the moving image encoding unit 103 in the process of encoding the image data (S103) and also acquires the shooting conditions from the shooting unit 301 (S301). Then, the control unit 302 identifies a target partial region in the captured image region based on the motion information and the acquired change in the photographing condition, and distinguishes the target partial region from other regions (S302). As in the case of the first embodiment described above, for example, a partial region in which an image motion that can be regarded as having an abnormality has occurred is distinguished from other regions as a target partial region.

  The distinction between the target partial region and other regions can be performed as follows.

  First, the motion information from the moving image encoding unit 103 is corrected based on the change in the shooting condition. When the shooting range as a shooting condition changes in the vertical direction and the horizontal direction by turning the camera in the vertical and horizontal directions, for example, vector information used as motion information is corrected by the change amount (movement amount) of the shooting range. Can do. Further, according to the amount of change in the shooting range, for example, the data amount of the encoded moving image data of each block used as motion information can be corrected. Further, for example, the number of intra-coded blocks corresponding to the amount of change in the shooting range is inter-coded with respect to information on the number of intra-coded blocks and the number of inter-coded blocks used as motion information. It can correct | amend so that it may determine as a block.

  In addition, when the shooting range as a shooting condition is enlarged or reduced with zooming in or out of the camera, for example, the vector length of vector information used as motion information according to the enlargement rate or reduction rate of the shooting range Can be corrected to reduce or enlarge. Furthermore, when the brightness and color tone change due to white balance as a shooting condition, for example, the change in the average value of pixel values (luminance values) of each block used as motion information according to the change amount of the brightness and color tone The amount can be corrected.

  After the motion information from the moving image encoding unit 103 is corrected in this way, based on the corrected motion information, the area of the captured image is the same as in the case of the first embodiment described above. A distinction is made between the partial region of interest and other regions.

  The control unit 302 determines a parameter to be set in the still image coding unit 104 for each of the identified target partial region and other regions in the same manner as in the first embodiment described above ( S105). That is, parameters used in still image coding are determined so that a relatively high-quality restored still image can be obtained for the target partial region, and the data amount can be reduced for other regions.

  Then, the control unit 302 supplies the parameter determined for the target partial region and the parameter determined for the other region to the still image encoding unit 104, and starts the still image encoding process of the image data in the still image encoding unit 104. (S106). As a result, the still image encoding unit 104 encodes the image data portion corresponding to the target partial region in the image data from the image input unit 102 according to the parameters determined for the target partial region, The image data portion corresponding to the area is encoded according to the parameters determined for the area. Then, the still image encoding unit 104 outputs encoded still image data generated by the encoding.

  After setting the parameters for the still image encoding unit 104, the control unit 106 determines whether or not the transmission instruction from the monitor device side is continued (S107), and while the transmission instruction is continued (YES in S107), the above-described processing (S102, S103, S301, S302, S105, S106) is repeatedly executed.

  According to such an image encoding device, even if a change in shooting conditions in the shooting unit 301 affects a moving image, motion information obtained in the process of encoding a moving image based on the shooting conditions is obtained. Since it is corrected, the motion information after the correction can be obtained by removing the influence of the change in the photographing condition. As a result, even if the shooting conditions change, based on the corrected motion information, for example, the image data that should be subjected to still image coding of the target partial region in which the motion of the image that can be regarded as having occurred is generated. Can be accurately identified in the captured image represented by Similarly to the above-described embodiments, a relatively high-quality restored still image can be obtained for the image data portion corresponding to the target partial region in which the motion of the image that can be regarded as an abnormality has occurred. Still image encoding is performed according to such parameters, and still image encoding is performed according to parameters that increase the degree of encoding and reduce the amount of data for image data portions corresponding to other regions. . Therefore, it is possible to perform still image coding that ensures efficient transmission and accumulation of still image encoded data while maintaining high image quality of a restored still image for a necessary area.

  Note that the above-described image encoding apparatus acquires the imaging conditions provided from the imaging unit 301, but acquires the imaging conditions from another apparatus, for example, a control device that controls the imaging conditions of the imaging unit 301. You can also

  Furthermore, a fourth embodiment of the present invention will be described. The fourth embodiment differs from the first embodiment described above in that still image coding is performed only for the target partial region.

  The image coding apparatus according to the fourth embodiment of the present invention is configured as shown in FIG. In FIG. 7, the same reference numerals are assigned to the same parts as those shown in FIG.

  In FIG. 7, the image encoding device 10 includes an image input unit 102, a moving image encoding unit 103, a still image encoding unit 104, and a transmission unit 105, as in the case of the first embodiment (see FIG. 1). Unlike the control unit 105 in the first embodiment described above, the cutout unit 401 and the control unit 402 that can control the cutout unit 401 are provided. The cutout unit 401 includes a buffer such as a RAM, and sequentially captures image data corresponding to the captured image from the image input unit 102, and image data corresponding to a part of the captured image from the image data should be encoded as a still image. Cut out as image data. The moving image encoding unit 103 generates encoded moving image data by encoding the image data corresponding to the captured image from the image input unit 102 as a moving image. The still image encoding unit 104 generates encoded still image data by encoding still image data corresponding to a part of the captured image output from the clipping unit 401. The control unit 402 controls the clipping unit 401 based on the motion information supplied from the moving image encoding unit 103 and controls the still image encoding process of the still image encoding unit 104.

  The image encoding apparatus configured as described above operates as follows.

  As in the case of the first embodiment described above, the moving image encoding unit 103 performs moving image encoding on the image data corresponding to the captured image from the image input unit 102 under the control of the control unit 402. The encoded moving image data is supplied to the transmission unit 105 and the motion information obtained in the moving image encoding process is supplied to the control unit 402. Under the control of the control unit 402, the cutout unit 401 cuts out image data corresponding to a target partial region that is a part of the photographed image from image data corresponding to the photographed image from the image input unit 102. Under the control of the control unit 402, the still image encoding unit 104 encodes the image data corresponding to the target partial region obtained by the clipping unit 401 and supplies the encoded still image data to the transmission unit 105. To do. Then, the transmission unit 105 transmits the encoded moving image data corresponding to the captured image and the encoded still image data corresponding to the target partial region to the reception unit 108 via the communication line 107.

  In the operation process of the image coding apparatus as described above, the control unit 402 performs processing according to the procedure shown in FIG. This process is performed by the CPU executing a program corresponding to the procedure shown in FIG. In FIG. 8, the same reference numerals are assigned to the processing blocks corresponding to the processing blocks shown in FIG.

  In FIG. 8, for example, when the control unit 402 in the waiting state of a transmission instruction from the monitor device side (S101) provided with the receiving unit 108 receives the transmission instruction (YES in S101), the moving image encoding unit 103 Then, the moving image encoding process is started (S102). Thus, the moving image encoding unit 103 encodes the image data corresponding to the captured image from the image input unit 102 as a moving image. The control unit 402 acquires motion information generated in the process in which the moving image encoding unit 103 performs the moving image encoding of the image data (S103). Based on the motion information, the control unit 402 identifies a target partial region in the region of the captured image represented by the image data in the same manner as in the first embodiment described above (S104). . For example, a partial region in which an image motion that can be considered to have occurred is identified as the target partial region.

  Next, the control unit 402 should extract the image data based on the resolution information of the image data input to the moving image encoding unit 103 and information on the target partial area specified in the captured image represented by the image data. The position information of the target partial region is generated, and the position information is supplied to the cutout unit 401 (S401). Thereby, the cutout unit 401 cuts out image data corresponding to the target partial region from the image data corresponding to the captured image based on the position information, and supplies the cut out image data to the still image encoding unit 104. . After generating the position information, the control unit 402, as in the case of the first embodiment described above, generates a still image code so that a relatively high-quality restored still image can be obtained for the target partial region. The parameter to be set by the conversion unit 104 is determined (S402).

  Then, the control unit 402 supplies the parameters to the still image encoding unit 104 together with the resolution information of the image data corresponding to the extracted target partial region, and performs still image encoding processing on the still image encoding unit 104. Start (S106). Accordingly, the still image encoding unit 104 performs still encoding on the image data corresponding to the target partial region supplied from the clipping unit 401 based on the resolution information and parameters of the image data supplied from the control unit 402. . Then, the still image encoding unit 104 outputs encoded still image data for the partial region of interest generated by the encoding.

  After setting the parameters for the still image encoding unit 104, the control unit 402 determines whether or not the transmission instruction from the monitor device side is continued (S107), and while the transmission instruction is continued (YES in S107), the above-described processing (S102 to S104, S401, S402, S106) is repeatedly executed.

  According to such an image encoding device, for example, a relatively high-quality restored still image can be obtained only in a partial region of interest in which a motion of an image that can be regarded as an abnormality has occurred in a captured image. Still image coding is performed according to the parameters. Therefore, it is possible to perform still image encoding that ensures efficient transmission and accumulation of still image encoded data while maintaining high image quality of a restored still image only in a necessary region.

  In the above-described image encoding device, the target partial region is identified in the same manner as in the first embodiment described above. However, in the case of the second embodiment described above (moving image encoding). The region of interest is specified in the same manner as the resolution of power image data and the resolution of image data to be encoded with still images. The attention partial area can be specified in the same manner as in the above.

  In the image encoding device according to each of the first to fourth embodiments described above, the encoded moving image data and the encoded still image data are transmitted to, for example, a monitor device. One or both of the digitized still image data may be stored in a storage device. The transmission timing and storage timing of the encoded moving image data and the encoded still image data can be arbitrarily set.

  As described above, the image encoding device according to the present invention uses the parameters to be used when encoding the image data corresponding to the captured image from the imaging unit when encoding the image data as the moving image. By controlling according to the obtained motion information, it has the effect that efficient transmission and storage of encoded still image data can be ensured, and encoding is performed from image data corresponding to the captured image from the imaging unit. This is useful as an image encoding device that generates encoded moving image data and encoded still image data.

The block diagram which shows the image coding apparatus which concerns on 1st embodiment of this invention. The flowchart which shows the process sequence in the control part in the image coding apparatus shown in FIG. The block diagram which shows the image coding apparatus which concerns on 2nd embodiment of this invention. The flowchart which shows the process sequence in the control part in the image coding apparatus shown in FIG. The block diagram which shows the image coding apparatus which concerns on 3rd embodiment of this invention. The flowchart which shows the process sequence in the control part in the image coding apparatus shown in FIG. The block diagram which shows the image coding apparatus which concerns on 4th embodiment of this invention. The flowchart which shows the process sequence in the control part in the image coding apparatus shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Image coding apparatus 101,301 Image pick-up part 102 Image input part 103 Moving image coding part 104 Still image coding part 105 Transmission part 106,202,302,402 Control part 107 Communication line 108 Reception part 201 Resolution conversion part 401 Extraction Part

Claims (30)

Moving image encoding means for encoding image data to generate encoded moving image data and motion information;
Still image encoding means for generating encoded still image data by encoding the image data according to a parameter;
An image coding apparatus comprising: parameter control means for controlling a parameter to be used by the still picture coding means based on motion information obtained by the moving picture coding means. The parameter control means has area dividing means for dividing the area of the image data into a plurality of partial areas based on the motion information,
2. The image encoding apparatus according to claim 1, wherein the parameter is controlled for each image data portion corresponding to each of the plurality of partial regions obtained by the region dividing means. 3. The image encoding apparatus according to claim 2, wherein the area dividing unit divides the area of the image data into a target partial area in which the motion information satisfies a predetermined condition and another area. Resolution conversion means for generating first converted image data to be encoded as a moving image by changing the resolution of the image data and second converted image data to be encoded as a still image by changing the resolution of the image data;
Moving image encoding means for generating encoded moving image data and motion information by encoding the first converted image data;
Still image encoding means for generating encoded still image data by encoding the second converted image data according to parameters;
Based on the motion information obtained by the moving image encoding means, the resolution of the first converted image data, and the resolution of the second converted image data, the parameters to be used by the still image encoding means are controlled. And a parameter control unit. The parameter control means has area classification means for dividing the area of the captured image into a plurality of partial areas based on the motion information, the resolution of the first converted image data, and the resolution of the second converted image data. And
5. The image coding apparatus according to claim 4, wherein the parameter is controlled so as to be different for each image data portion corresponding to each of the plurality of partial regions obtained by the region sorting means. 6. The image encoding apparatus according to claim 5, wherein the area dividing means divides the area of the image data into a target partial area in which the motion information satisfies a predetermined condition and another area. The area dividing means includes temporary area dividing means for dividing the area of the image data into a plurality of temporary partial areas based on the motion information;
Partial area correction means for correcting each temporary partial area obtained by the temporary area dividing means based on the resolution of the first converted image data and the resolution of the second converted image and setting the partial area; The image encoding device according to claim 5, wherein the image encoding device includes: Moving image encoding means for encoding image data to generate encoded moving image data and motion information;
Still image encoding means for generating encoded still image data by encoding the image data according to a parameter;
Shooting condition acquisition means for acquiring shooting conditions of the image data;
Image coding comprising: parameter control means for controlling a parameter to be used in the still picture coding means based on motion information obtained by the moving picture coding means and a change in the shooting conditions apparatus. The parameter control means includes area dividing means for dividing the area of the image data into a plurality of partial areas based on the movement information and the change in the photographing condition,
9. The image encoding apparatus according to claim 8, wherein the parameter is controlled so as to be different for each image data portion corresponding to each of the plurality of partial regions obtained by the region dividing means. 10. The image coding apparatus according to claim 9, wherein the area dividing unit divides the area of the image data into a target partial area and other areas in which the motion information satisfies a predetermined condition. The region segmentation unit includes a motion information correction unit that corrects the motion information from the moving image encoding unit based on a change in the shooting condition to generate corrected motion information.
The image coding apparatus according to claim 9 or 10, wherein an area of the image data is divided into a plurality of partial areas based on the corrected motion information. Moving image encoding means for encoding image data to generate encoded moving image data and motion information;
Still image encoding means for encoding still image data according to parameters and generating encoded still image data; and
Image cutout means for cutting out image data of an image that becomes a part of the image data and giving it to the still image encoding means as the input image data;
An image coding apparatus comprising: a clipping control unit that determines an image portion of image data to be cut out by the image cutting unit based on the motion information obtained by the moving image coding unit. The cutout control means includes an image portion of the image data to be cut out by the image cutout means in the region of the image data where the movement information satisfies a predetermined condition and the other portion of the region of interest. The image encoding device according to claim 12, wherein the image encoding device is determined as: 14. The image encoding device according to claim 12, further comprising parameter determining means for determining a parameter used in the still image encoding means. A moving image encoding step of encoding image data to generate encoded moving image data and motion information;
A still image encoding step of encoding the still image data according to the parameters to generate encoded still image data; and
And a parameter control step for controlling a parameter to be used in the still image encoding step based on motion information obtained in the moving image encoding step. The parameter control step includes a region dividing step of dividing the region of the image data into a plurality of partial regions based on the motion information,
16. The image encoding method according to claim 15, wherein the parameter is controlled for each image data portion corresponding to each of the plurality of partial regions obtained by the region dividing means. A resolution conversion step of generating first converted image data to be encoded by changing the resolution of the image data and second converted image data to be encoded by changing the resolution of the image data;
A moving image encoding step of encoding the first converted image data to generate encoded moving image data and motion information;
A still image encoding step of generating encoded still image data by encoding the second converted image data according to a parameter;
Based on the motion information obtained by the moving image encoding means, the resolution of the first converted image data, and the resolution of the second converted image data, the parameters to be used by the still image encoding means are controlled. And a parameter control step. The parameter control step includes a region dividing step of dividing the region of the captured image into a plurality of partial regions based on the motion information, the resolution of the first converted image data, and the resolution of the second converted image data. And
18. The image encoding method according to claim 17, wherein the parameter is controlled to be different for each image data portion corresponding to each of the plurality of partial regions obtained in the region dividing step. A moving image encoding step of encoding image data to generate encoded moving image data and motion information;
A still image encoding step of generating encoded still image data by encoding the still image according to a set parameter;
A shooting condition acquisition step of acquiring a shooting condition of the image data;
And a parameter control step for controlling a parameter to be used in the still image encoding step based on motion information obtained in the moving image encoding step and a change in the shooting condition. Method. The parameter control step includes a region dividing step of dividing the region of the image data into a plurality of partial regions based on the movement information and the change in the photographing condition,
20. The image encoding method according to claim 19, wherein the parameter is controlled so as to be different for each image data portion corresponding to each of the plurality of partial regions obtained in the region dividing step. A moving image encoding step of encoding image data to generate encoded moving image data and motion information;
A still image encoding step for generating encoded still image data by encoding the input image data according to the parameters;
An image cut-out step of cutting out cut-out image data of an image to be a part of the image data and giving the cut-out image data as the input image data to the still image encoding unit;
An image encoding method comprising: an extraction control step for determining an image portion of image data to be extracted in the image extraction step based on the motion information obtained in the moving image encoding step. In the cutout control step, the image portion of the image data to be cut out by the image cutout means for extracting the portion of interest from among the portion of interest and other regions in which the motion information satisfies a predetermined condition in the region of the image data The image encoding method according to claim 21, wherein the image encoding method is determined as: Obtaining the motion information from moving image encoding means for encoding image data and generating encoded moving image data and motion information;
A parameter control step for controlling a parameter used when the still image encoding means encodes the image data to generate encoded still image data based on the motion information. Program to do. The parameter control step includes a region dividing step of dividing the region of the image data into a plurality of partial regions based on the motion information,
24. The program according to claim 23, wherein the parameter is controlled for each image data portion corresponding to each of the plurality of partial regions obtained in the region dividing step. Provided from resolution conversion means for generating first converted image data to be encoded as a moving image by changing the resolution of the image data and second converted image data to be encoded as a still image by changing the resolution of the image data. Obtaining the motion information from moving image encoding means for encoding the first converted image data to generate an encoded moving image and motion information;
Obtaining a resolution of the first converted image data and a resolution of the second converted image;
Based on the motion information, the resolution of the first converted image data, and the resolution of the second converted image data, a parameter when the still image encoding means encodes the second converted image data is controlled. And a parameter control step for causing the computer to execute the parameter control step. The parameter control step includes a region dividing step of dividing the region of the captured image into a plurality of partial regions based on the motion information, the resolution of the first converted image data, and the resolution of the second converted image data. And
26. The program according to claim 25, wherein the parameter is controlled to be different for each image data portion corresponding to each of the plurality of partial regions obtained in the region dividing step. Obtaining the motion information from moving image encoding means for encoding image data and generating encoded moving image data and motion information;
A shooting condition acquisition step of acquiring a shooting condition of the image data;
A parameter control step for controlling a parameter used when the still image encoding means encodes the image data to generate encoded still image data based on the motion information and the change in the shooting condition; A program characterized by being executed. The parameter control step includes a region dividing step of dividing the region of the image data into a plurality of partial regions based on the movement information and the change in the photographing condition,
28. The program according to claim 27, wherein the parameter is controlled to be different for each image data portion corresponding to each of the plurality of partial regions obtained in the region dividing step. Obtaining the motion information from moving image encoding means for encoding image data and generating encoded moving image data and motion information;
An image obtained by cutting out image data that is part of the image data and providing it as the input image data to a still image encoding means that encodes the input image data according to the parameters to generate encoded still image data A program for causing a computer to execute a step of determining an image portion of image data to be cut out by a cutting means based on the motion information. In the cutout control step, the image portion of the image data to be cut out by the image cutout means for extracting the portion of interest from among the portion of interest and other regions in which the motion information satisfies a predetermined condition in the region of the image data 30. The program according to claim 29, which is determined as:

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