WO2014181743A1 - 画像処理装置及び画像処理方法 - Google Patents

画像処理装置及び画像処理方法 Download PDF

Info

Publication number
WO2014181743A1
WO2014181743A1 PCT/JP2014/061987 JP2014061987W WO2014181743A1 WO 2014181743 A1 WO2014181743 A1 WO 2014181743A1 JP 2014061987 W JP2014061987 W JP 2014061987W WO 2014181743 A1 WO2014181743 A1 WO 2014181743A1
Authority
WO
WIPO (PCT)
Prior art keywords
value
luminance
range
image processing
characteristic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2014/061987
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
俊和 村尾
貴之 木村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Denso Corp
Original Assignee
Denso Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Denso Corp filed Critical Denso Corp
Priority to DE112014002331.0T priority Critical patent/DE112014002331T5/de
Priority to US14/889,789 priority patent/US9800881B2/en
Priority to CN201480025880.6A priority patent/CN105190687B/zh
Publication of WO2014181743A1 publication Critical patent/WO2014181743A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • GPHYSICS
    • G06COMPUTING OR CALCULATING; COUNTING
    • G06TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T5/00Image enhancement or restoration
    • G06T5/90Dynamic range modification of images or parts thereof
    • G06T5/92Dynamic range modification of images or parts thereof based on global image properties
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/42Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
    • H04N19/423Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation characterised by memory arrangements
    • H04N19/426Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation characterised by memory arrangements using memory downsizing methods
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60Control of cameras or camera modules
    • H04N23/61Control of cameras or camera modules based on recognised objects
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70Circuitry for compensating brightness variation in the scene
    • H04N23/71Circuitry for evaluating the brightness variation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70Circuitry for compensating brightness variation in the scene
    • H04N23/76Circuitry for compensating brightness variation in the scene by influencing the image signals
    • GPHYSICS
    • G06COMPUTING OR CALCULATING; COUNTING
    • G06TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00Indexing scheme for image analysis or image enhancement
    • G06T2207/30Subject of image; Context of image processing
    • G06T2207/30248Vehicle exterior or interior
    • G06T2207/30252Vehicle exterior; Vicinity of vehicle
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/10Circuitry of solid-state image sensors [SSIS]; Control thereof for transforming different wavelengths into image signals
    • H04N25/11Arrangement of colour filter arrays [CFA]; Filter mosaics
    • H04N25/13Arrangement of colour filter arrays [CFA]; Filter mosaics characterised by the spectral characteristics of the filter elements
    • H04N25/134Arrangement of colour filter arrays [CFA]; Filter mosaics characterised by the spectral characteristics of the filter elements based on three different wavelength filter elements

Definitions

  • the present invention relates to an image processing apparatus and an image processing method for detecting a recognition target from an image captured by a camera such as an in-vehicle camera.
  • an image processing apparatus that detects a preset recognition target from an image captured by a camera.
  • This image processing apparatus has various processing capabilities depending on the application. Cameras are designed to output image data with a wide dynamic range due to improved performance. Therefore, when the dynamic range (for example, 12 bits) of the image data output from the camera exceeds the processing capability (for example, 8 bits) of the image processing apparatus, the gradation that reduces the number of gradations for the image data output from the camera.
  • HDR characteristics refer to the characteristics of a camera as the relationship between luminance and output pixel value (luminance display value), and the relationship between the output pixel value and the luminance is not constant (linear) in the entire luminance region, but the luminance region.
  • the resolution is finely set in a certain luminance range (hereinafter referred to as a fine resolution range), and the resolution is set coarser than the fine resolution range in a different area (hereinafter referred to as a coarse resolution range).
  • gradation conversion for reducing the number of gradations may be performed for output pixel values output from a camera having such HDR characteristics. For example, there is a case of converting from 12 bits to 8 bits. In this case, when the compression ratio uniformly compressing each output pixel value 1/2 4, the resolution of the coarse resolution area is further reduced. That is, when the luminance of the recognition target is included in this coarse resolution region, there is a possibility that the detection accuracy of the recognition target is lowered.
  • the present invention has been made in view of such problems, and provides an image processing apparatus that accurately detects a recognition target in an image represented by image data that has been subjected to gradation conversion so as to reduce the number of gradations. For the purpose.
  • the acquisition unit converts the luminance value represented by the first number of gradations with a preset nonlinear conversion characteristic to the first display.
  • Image data that is a data string composed of the first display values output from the image sensor is acquired as a value.
  • the compression means compresses the first display value with a preset compression characteristic, and outputs a value represented by a second number of gradations smaller than the first number of gradations as a second display value.
  • a recognition means detects a recognition target from the image represented by the compressed data which is a data string which consists of a 2nd display value.
  • a ratio of the second number of gradations to the first number of gradations is referred to as a basic compression ratio
  • a luminance range including at least a recognition target range that is estimated to be present as a recognition target is referred to as a designated range.
  • the first display value corresponding to the boundary luminance value that is the minimum luminance value in the specified range is referred to as the boundary first display value.
  • the second display value is a value obtained by compressing a value equal to or higher than the boundary first display value among the first display values at a low compression ratio lower than the basic compression ratio, and the boundary first display. It is set to be the sum of the values.
  • non-linear characteristics referred to as conversion characteristics include characteristics set as a combination of linear characteristics predetermined for each luminance range.
  • the boundary first display value described above includes 0.
  • FIG. 1 is a block diagram illustrating a configuration of the driving support system according to the first embodiment.
  • FIG. 2 is a characteristic diagram showing HDR characteristics of the camera.
  • FIG. 3 is a flowchart for explaining processing executed by the CPU.
  • FIG. 4 is an explanatory diagram for explaining the total conversion characteristics.
  • FIG. 5 illustrates the difference between the detection result of the white line based on the total conversion characteristics in the image processing apparatus according to the first embodiment and the detection result of the white line obtained by uniformly compressing the pixel output value with the basic compression ratio.
  • FIG. 6A is a diagram showing an example of an image obtained by uniformly compressing the pixel output values at the basic compression ratio
  • FIG. 6B is an image processing apparatus according to the first embodiment.
  • FIG. 7 is an explanatory diagram showing the luminance distribution for each of a black vehicle, a gray vehicle, and a white vehicle when the recognition target is a vehicle.
  • FIG. 8 is an explanatory diagram showing total conversion characteristics in a modification.
  • FIG. 9 is an explanatory diagram showing the total conversion characteristics of the modified example.
  • FIG. 10 is a block diagram illustrating a configuration of the driving support system according to the second embodiment.
  • FIG. 11 is an explanatory diagram showing the arrangement of pixels in the imager.
  • FIG. 12 is an explanatory diagram for explaining the difference between the detection result based on the total conversion characteristics in the image processing apparatus according to the second embodiment and the detection result obtained by uniformly compressing the pixel output value at the basic compression ratio. .
  • the image processing apparatus is applied to a driving support system that is mounted on a vehicle, detects a recognition target existing in front of the vehicle (own vehicle), and executes various driving support controls based on the detection result.
  • the driving support system 1 includes an in-vehicle camera (hereinafter simply referred to as a camera) 20 that images the front of the host vehicle VE and outputs the captured image as 12-bit image data.
  • This camera functions as an imaging means.
  • the driving support system 1 converts the image data output from the camera 20 into 8-bit image data, and uses the image represented by the converted image data to perform image processing according to various applications (applications).
  • the image processing apparatus 10 is provided that executes (a process of detecting a recognition target such as a preceding vehicle, a pedestrian, or a white line and outputting a detection result).
  • the driving support system 1 uses the detection result of the image processing device 10 to determine whether there is at least a risk that the host vehicle VE deviates from the lane in this embodiment.
  • the vehicle control apparatus 40 which instruct
  • the camera 20 and the image processing device 10 are referred to as an imaging device 30.
  • the camera 20 is installed at a predetermined position in the vehicle interior, for example, behind the rearview mirror, and outputs image data representing an image obtained by imaging the front of the vehicle VE in the traveling direction.
  • the camera 20 includes an imager 20A including an image sensor that generates image data representing a captured image, and an input / output interface circuit 20B for the image processing apparatus 10.
  • the imager 20A includes a signal processing circuit 202 having a built-in amplification unit and A / D conversion unit in addition to a known CCD image sensor (imaging device) or CMOS image sensor (imaging device) 201.
  • the image sensor 201 captures an image
  • the amplification unit and the A / D conversion unit amplify an analog signal indicating the luminance of each pixel of the image with a predetermined gain, and the amplified analog value is a first level. It is converted into a digital value represented by a logarithm (here, 12 bits). For this reason, the camera 20 outputs the output pixel value (corresponding to the “first display value”), which is a signal converted into the digital value, as 12-bit imaging data (data string including the output pixel value).
  • an imager having a high dynamic range (HDR) characteristic for expanding the dynamic range is used.
  • HDR high dynamic range
  • the relationship of the output pixel value with respect to the luminance is not constant (linear) in the entire luminance range, but is different (nonlinear) in each luminance range.
  • the HDR characteristic includes a range of luminance values 0 to L 1 (hereinafter referred to as luminance ranges 0 to L 1 ) and a remaining luminance range (luminance ranges L 1 to L 2 ).
  • luminance ranges 0 to L 1 luminance ranges 0 to L 1
  • luminance ranges L 1 to L 2 luminance ranges L 1 to L 2
  • such a relationship of broken lines that is, a combination of linear characteristics that differ depending on the luminance range is also included in the nonlinear characteristics.
  • the imager 20A can output a wide luminance range while reducing the resolution of the low luminance range.
  • the HDR characteristic refers to the relationship between the luminance L and the output pixel value Y shown in FIG. Note that the relationship between the luminance L and the output pixel value Y shown in FIG. 2 shows an example.
  • the image processing apparatus 10 is mainly configured by a microcomputer including a CPU 12, a ROM 13, a RAM 14, and a flash memory (not shown). Although not shown, the image processing apparatus 10 includes an interface circuit that inputs and outputs various signals (for example, an input circuit that inputs image data from the camera 20 and an output circuit that outputs detection results to the vehicle control device 40). Prepare. Note that the image processing apparatus 10 is configured to process 8-bit data.
  • the image processing apparatus 10 compresses at least 12-bit imaging data input from the camera 20 into 8-bit image data and outputs the compressed data as compressed data. And a recognition target detection process for detecting a recognition target from an image represented by the compressed data. The detection result is output to the vehicle control device 40.
  • the vehicle control device 40 is a device for performing driving support control.
  • the host vehicle deviates from the lane according to the detection result (the position of the white line) input from the image processing device 10.
  • indicates to issue the warning with respect to the warning part 41 may be performed as an application.
  • the CPU 12 When the processing starts, the CPU 12 first reads out an output pixel value (imaging data) input from the camera 20 and stored in the RAM 14 in step S110. In step S120, the compression characteristic stored in advance in the ROM 13 is read out, the output pixel value is compressed from 12 bits to 8 bits in accordance with the compression characteristic, and the compressed output pixel value is converted into a compressed pixel value ("second display value"). ”) Is output.
  • step S130 a recognition target detection process is performed to detect a recognition target (white line) from an image represented by compressed data, which is a data string composed of 8-bit compressed pixel values.
  • step S140 the detection result (the position of the white line) is output to the vehicle control device 40, and this process ends. Since various methods are known for detecting a recognition target in the recognition target detection process, a description thereof will be omitted.
  • the compression characteristic is stored in the ROM 13 as a conversion table in which an output pixel value represented by 12 bits and a corresponding compressed pixel value represented by 8 bits are shown.
  • a characteristic obtained by combining the compression characteristic and the conversion characteristic is referred to as a total conversion characteristic
  • an 8-bit output pixel value which is the number of gradations (corresponding to the “second gradation number”) representing the compression pixel value is A ratio to 12 bits, which is the number of gradations to be represented (corresponding to “first gradation number”) is called a basic compression ratio (2 ⁇ 4 in this case)
  • a luminance range estimated to have a recognition target exists Let's say.
  • a luminance range including at least the recognition target range is referred to as a designated range
  • an output pixel value corresponding to a boundary luminance value that is the minimum luminance value in the designated range is referred to as a boundary first display value.
  • the conversion table compression characteristics
  • the conversion table includes a low compression value obtained by compressing a value of the output pixel value equal to or higher than the boundary first display value with a low compression ratio ⁇ lower than the basic compression ratio, It is set to be the sum of one display value.
  • the recognition target range is set to luminance ranges L 1 to L 3 where a white line that is a recognition target exists.
  • the designated range is set such that the boundary luminance value becomes the minimum luminance value in the luminance range including the designated range. That is, in the present embodiment, the designated range is set to match the recognition target range, and the boundary first display value is set to the output pixel value Y 1 corresponding to the boundary luminance value L 1 .
  • the compression value (Z 1 ) corresponding to the boundary first display value (Y 1 ) is referred to as a compression basic value Z 1 .
  • the conversion table low-compresses the difference between the compression basic value Z 1 , the output pixel value Y, and the boundary first display value Y 1 as shown in Expression (5).
  • the sum with the value compressed at the rate ⁇ is set to the compressed pixel value Z.
  • the low compression ratio ⁇ is set to 1, and compression in which the low compression ratio ⁇ is set to 1 is referred to as uncompressed. That is, in the uncompressed state, the ratio of change of the compressed pixel value Z with respect to the luminance value L (change ratio after compression) in the specified range is changed by the conversion based on the total conversion characteristics.
  • the conversion table is set to be the same as the change ratio before compression).
  • the conversion table is set so that the output pixel value Y is converted into the compressed pixel value Z according to the equation (5) for the luminance value L (L> L 3 ) larger than the specified range.
  • the output pixel value represented by the first gradation number (12 bits) is the second gradation number smaller than the first gradation number.
  • the conversion table used for compression does not use the value obtained by uniformly compressing the output pixel value at the basic compression ratio as the compressed pixel value, Among the pixel values, values exceeding the first display value are set to be compressed with a compression ratio ⁇ lower than the basic compression ratio, and set as a compressed pixel value.
  • the conversion table is set so as to be uncompressed.
  • the total conversion characteristic is indicated by a dotted line in FIG.
  • a characteristic for uniformly compressing pixel output values at a basic compression ratio (referred to as basic compression ratio characteristic) is shown by a solid line in FIG.
  • the representative value of the luminance value representing the road surface is set to L R
  • the representative value of the luminance value representing the white line is set to L H
  • the compressed pixel value Z R and the white line luminance L H corresponding to the road surface luminance L R obtained by the total conversion characteristics are obtained.
  • a contrast value C H that is a difference from the corresponding compressed pixel value Z H is expressed by Expression (6).
  • the contrast value C P obtained by the basic compression ratio characteristic is represented by the formula (7).
  • a larger contrast value CH can be obtained with the total conversion characteristics.
  • the image processing apparatus 10 even when the pixel output value is compressed to the compressed pixel value (gradation conversion), a gradation difference is ensured and a reduction in resolution in the recognition target range can be suppressed.
  • the image processing apparatus 10 can obtain an image in which the contrast of the white line with respect to the road surface is clearer than when the basic compression ratio characteristic is used (see FIG. 6A) (FIG. 6B). reference). Therefore, in the image represented by the compressed pixel value after compression, it is possible to suppress degradation in detection accuracy of the recognition target.
  • FIG. 7 is a diagram illustrating an example of the luminance distribution and the HDR characteristics for the black vehicle, the gray vehicle, and the white vehicle.
  • the object containing the change point of the HDR characteristics within the range of the luminance distribution that is, the gray vehicle shown in FIG. 7, the change point luminance value L 1 near In the luminance value L, no gradation difference appears, the resolution is lowered, and the contrast with respect to the road surface is lowered.
  • the gray vehicle detection accuracy is lower than that of the black vehicle and the white vehicle.
  • the image processing apparatus 10 has a gradation difference in the compressed pixel value with respect to the luminance value L in the vicinity of the change point luminance value L 1 and suppresses a decrease in resolution as compared with the case of uniformly compressing at the basic compression ratio. Therefore, a decrease in contrast with respect to the road surface is suppressed for the gray vehicle. As a result, the image processing apparatus 10 can suppress a decrease in gray vehicle detection accuracy.
  • a conversion table (compression characteristic) is set so as to suppress a decrease in resolution for a luminance range in which a white line is estimated to exist.
  • the reduction in resolution is suppressed in the recognition target range when the recognition target is a pedestrian (that is, the pedestrian contrast with respect to the road surface becomes clear).
  • the compression characteristics may be set. In this way, by setting the compression characteristics according to the application, it is possible to suppress a decrease in the detection accuracy of the recognition target.
  • step S110 corresponds to an acquisition unit
  • step S120 corresponds to a compression unit
  • step S130 corresponds to a recognition unit.
  • the low compression ratio ⁇ is set to 1 in the compression characteristics, but the setting of the low compression ratio ⁇ is not limited to this.
  • the low compression ratio ⁇ may be set to a compression ratio lower than the basic compression ratio. In this case (beta ⁇ 1), the luminance value Le when compressed pixel value Z becomes 2 8 can be enlarged Le> L4, and the dynamic range.
  • the low compression ratio ⁇ similar to that in the designated range is set even in the luminance range larger than the designated range in the compression characteristics.
  • the present invention is not limited to this.
  • a compression ratio higher than the low compression ratio ⁇ , which is different from the low compression ratio ⁇ may be set. Thereby, the contrast of the white line with respect to the road surface can be clarified and the dynamic range can be expanded.
  • the compression ratio ⁇ is set to the basic compression ratio, but the setting of the compression ratio ⁇ is not limited to this.
  • the compression ratio ⁇ may be set to a higher compression value than the basic compression ratio.
  • the compression characteristic includes the change point luminance value L 1 of the HDR characteristic in the recognition target range (for example, when the recognition target is a gray vehicle with respect to the HDR characteristic as shown in FIG. 7), the total conversion is performed.
  • the relationship between the compressed pixel value and the luminance value may be set to be linear within the specified range.
  • the compression characteristic may be set so that the relationship of the compressed pixel value to the luminance value is linear.
  • the compressed pixel value has a gradation difference due to the conversion based on the total conversion characteristics. Accuracy) can be improved.
  • the compression characteristic may be set so that the relationship of the compressed pixel value converted by the total conversion characteristic to the luminance value is expressed in a logarithm (see FIG. 9).
  • the specified range is set so that the boundary luminance value matches the change point luminance value, but the specified range may be set so that the boundary luminance value does not match the change point luminance value.
  • the designated range does not have to coincide with the recognition target range as in the above-described embodiment, and may be set to a range including at least the recognition target range.
  • the driving support system 2 is mounted on a vehicle VE, and detects, for example, a taillight (red) of a preceding vehicle existing in front of the vehicle (own vehicle) VE as a recognition target.
  • a taillight red
  • the headlight of the host vehicle is set to a low beam when a preceding vehicle is present, and the high beam is set to be high when a preceding vehicle is not present.
  • the image processing apparatus 11 has a plurality of pieces of image data representing color images, that is, R (red) and G (green), as imaged data output from the camera 21 (imaging unit). ) And B (blue) are different in that they consist of image data for three channels. Accordingly, part of the processing executed by the CPU 12 is different from the above embodiment.
  • the color filter 21A, the imager 21B, and the input / output interface circuit 21C are arranged in this order from the front side of the camera 21. For this reason, light from the outside enters the imager 21B through the color filter 21A.
  • the color filter 21A may be integrally provided on the front surface of the imager 21B, or may be disposed on the front surface of the imager 21B as a separate body. As shown in FIG. 11, the color filter 21A selects pixels that selectively detect R (red) light, pixels that selectively detect G (green) light, and B (blue) light.
  • the pixels to be detected are configured according to a Bayer array, and the color of an arbitrary pixel is determined from the detection results (pixel output values) of a plurality of pixels adjacent to the pixel.
  • the imager 21B outputs, for each pixel, image data for 3 channels of R (red), G (green), and B (blue) (a data string composed of 12-bit pixel output values).
  • an imager having an HDR characteristic is used as in the above-described embodiment, and in the following, for the sake of simplicity of explanation, it is assumed that the imager has a characteristic similar to the HDR characteristic shown in FIG.
  • the CPU 12 performs the same processing as the flowchart shown in FIG. However, this embodiment is different from the above embodiment in that the imaging data to be processed is image data of three channels of R (red), G (green), and B (blue).
  • step S110 image data for three channels of R, G, and B is read in step S110 shown in FIG.
  • step S120 according to the compression characteristics (conversion table) stored in the ROM 13, the pixel output values for the R, G, and B channels for each pixel are compressed from 12 bits to 8 bits. , R, G, and B are output as compressed pixel values for three channels.
  • step S130 the red taillight of the preceding vehicle is detected as a recognition target from the image represented by the compressed data, which is a data string composed of compressed pixel values for R, G, and B channels.
  • FIG. 12 shows a case where the pixel output value corresponding to the representative luminance value Lb representing B (blue) and the representative luminance value Lr representing G (green) is compressed by the image processing device 11.
  • R the pixel output value corresponding to the representative luminance value Lb representing B (blue) and the representative luminance value Lr representing G (green) is compressed by the image processing device 11.
  • G the pixel output value corresponding to the representative luminance value Lb representing B (blue) and the representative luminance value Lr representing G (green) is compressed by the image processing device 11.
  • G compressed data (compressed pixel values) of R, G, and B image data when compressed by basic compression ratio characteristics (see the description of the above embodiment) for comparison Indicates the ratio.
  • the reduction ratio of the R compressed data is suppressed by the composition ratio of the R, G, B compressed data, and is recognized as red. be able to.
  • the R, G, B image data represented by the first gradation number (12 bits) is the second gradation number smaller than the first gradation number.
  • the image data is compressed into R, G, and B image data represented by the number of gradations (8 bits), color misrecognition can be suppressed.
  • the detection accuracy of the taillight is improved, and automatic high beam control can be realized with high accuracy.
  • the conversion table is set so that the relationship of the compressed pixel value converted by the total conversion characteristic to the luminance value is linear for each luminance range, but the compressed pixel converted by the total conversion characteristic
  • the conversion table may be set so that the relationship of the value to the luminance value is represented by a logarithm (see FIG. 9). According to this, since there is no point (change point) where the compressed pixel value suddenly changes with respect to the luminance, the color detection accuracy can be improved.
  • the image processing apparatuses 10 and 11 are configured to convert the pixel output value into the compressed pixel value using the conversion table in step S120.
  • the present invention is not limited to this.
  • the pixel output value may be converted into a compressed pixel value by an equation such as a primary equation or a quadratic equation.
  • the HDR characteristic is set so as to make the resolution in the low luminance range fine, but it may be set so as to make the resolution in the high luminance range fine.
  • the HDR characteristic is set to a characteristic having one change point in the above embodiment, but may be set to a characteristic having a plurality of change points.
  • the lane keeping control and the auto high beam control are executed as the application executed by the driving support system.
  • the driving support device detects, for example, the front vehicle as a recognition target by the vehicle control device, and the inter-vehicle control that secures the inter-vehicle distance from the detected front vehicle, the follow-up control that travels following the front vehicle, or the recognition
  • Various driving support controls such as avoidance control for controlling a vehicle so as to avoid the detected pedestrian, may be configured to be executed as an application.
  • the components of the image processing apparatus exemplified in the above embodiment may be realized by hardware, software, or a combination of hardware and software.
  • you may comprise at least one part of an image processing apparatus by the computer apparatus (for example, microcomputer) which performs the process (program) mentioned above.
  • These components are functionally conceptual, and some or all of them may be functionally or physically distributed or integrated.
  • the above embodiment is merely an example of an embodiment to which the present invention is applied.
  • the present invention can be realized in various forms such as an image processing apparatus, an image processing method, a program for causing a computer to function as the image processing apparatus, and a recording medium on which the program is recorded.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Image Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Studio Devices (AREA)
  • Closed-Circuit Television Systems (AREA)
PCT/JP2014/061987 2013-05-07 2014-04-30 画像処理装置及び画像処理方法 Ceased WO2014181743A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE112014002331.0T DE112014002331T5 (de) 2013-05-07 2014-04-30 Bildverarbeitungsvorrichtung und Bildverarbeitungsverfahren
US14/889,789 US9800881B2 (en) 2013-05-07 2014-04-30 Image processing apparatus and image processing method
CN201480025880.6A CN105190687B (zh) 2013-05-07 2014-04-30 图像处理装置以及图像处理方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013-097664 2013-05-07
JP2013097664A JP6064776B2 (ja) 2013-05-07 2013-05-07 画像処理装置及び画像処理方法

Publications (1)

Publication Number Publication Date
WO2014181743A1 true WO2014181743A1 (ja) 2014-11-13

Family

ID=51867224

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2014/061987 Ceased WO2014181743A1 (ja) 2013-05-07 2014-04-30 画像処理装置及び画像処理方法

Country Status (5)

Country Link
US (1) US9800881B2 (enExample)
JP (1) JP6064776B2 (enExample)
CN (1) CN105190687B (enExample)
DE (1) DE112014002331T5 (enExample)
WO (1) WO2014181743A1 (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9800881B2 (en) 2013-05-07 2017-10-24 Denso Corporation Image processing apparatus and image processing method

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6390512B2 (ja) * 2015-05-21 2018-09-19 株式会社デンソー 車載カメラ装置
JP6912957B2 (ja) * 2016-10-04 2021-08-04 キヤノン株式会社 画像処理装置、画像処理方法およびプログラム
EP3636490B1 (en) * 2017-06-09 2023-05-24 Koito Manufacturing Co., Ltd. Vehicular lamp, and device and method for controlling same
JP7151234B2 (ja) * 2018-07-19 2022-10-12 株式会社デンソー カメラシステムおよびイベント記録システム
US11227409B1 (en) 2018-08-20 2022-01-18 Waymo Llc Camera assessment techniques for autonomous vehicles
US11699207B2 (en) 2018-08-20 2023-07-11 Waymo Llc Camera assessment techniques for autonomous vehicles
JP7217211B2 (ja) * 2019-08-23 2023-02-02 日立Astemo株式会社 撮像装置及び撮像方法
JP7618603B2 (ja) * 2022-01-28 2025-01-21 キヤノン株式会社 カメラシステム、移動体、カメラシステムの制御方法、及びコンピュータプログラム

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000115534A (ja) * 1998-09-30 2000-04-21 Fuji Photo Film Co Ltd 画像処理方法および装置並びに記録媒体
JP2001086365A (ja) * 1999-09-14 2001-03-30 Matsushita Electric Ind Co Ltd ガンマ補正回路およびニー補正回路
JP2004221645A (ja) * 2003-01-09 2004-08-05 Sony Corp 画像処理装置および方法、記録媒体、並びにプログラム
JP2006237851A (ja) * 2005-02-23 2006-09-07 Mitsubishi Electric Corp 画像入力装置
WO2006098360A1 (ja) * 2005-03-15 2006-09-21 Omron Corporation 画像処理装置および画像処理方法、画像処理システム、プログラム、並びに、記録媒体
WO2006103881A1 (ja) * 2005-03-29 2006-10-05 Konica Minolta Photo Imaging, Inc. 撮像装置
JP2007082180A (ja) * 2005-08-16 2007-03-29 Konica Minolta Holdings Inc 撮像装置及び画像処理方法
JP2008289120A (ja) * 2007-04-18 2008-11-27 Panasonic Corp 撮像装置、撮像方法、集積回路およびプログラム
WO2009057478A1 (ja) * 2007-11-01 2009-05-07 Konica Minolta Opto, Inc. 画像処理装置、画像処理方法、及び撮像装置
WO2011155136A1 (ja) * 2010-06-07 2011-12-15 コニカミノルタオプト株式会社 撮像装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101051604B1 (ko) 2003-01-09 2011-07-22 소니 주식회사 화상 처리 장치 및 방법
US7791656B2 (en) 2005-08-16 2010-09-07 Konica Minolta Holdings, Inc. Image sensing apparatus and image processing method
US8144214B2 (en) 2007-04-18 2012-03-27 Panasonic Corporation Imaging apparatus, imaging method, integrated circuit, and storage medium
JP2008305122A (ja) 2007-06-07 2008-12-18 Sony Corp 画像処理装置、画像処理方法、およびプログラム
JP5275122B2 (ja) * 2008-05-30 2013-08-28 パナソニック株式会社 ダイナミックレンジ圧縮装置、ダイナミックレンジ圧縮方法、プログラム、集積回路および撮像装置
JP4632100B2 (ja) * 2008-06-09 2011-02-16 ソニー株式会社 画像処理装置、画像処理方法、記録媒体、およびプログラム
JP2010219624A (ja) * 2009-03-13 2010-09-30 Toshiba Corp 画像信号処理装置及び画像信号処理方法
JP2012208776A (ja) * 2011-03-30 2012-10-25 Fujitsu Ltd 画像処理装置、画像処理方法およびプログラム
JP6064776B2 (ja) 2013-05-07 2017-01-25 株式会社デンソー 画像処理装置及び画像処理方法

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000115534A (ja) * 1998-09-30 2000-04-21 Fuji Photo Film Co Ltd 画像処理方法および装置並びに記録媒体
JP2001086365A (ja) * 1999-09-14 2001-03-30 Matsushita Electric Ind Co Ltd ガンマ補正回路およびニー補正回路
JP2004221645A (ja) * 2003-01-09 2004-08-05 Sony Corp 画像処理装置および方法、記録媒体、並びにプログラム
JP2006237851A (ja) * 2005-02-23 2006-09-07 Mitsubishi Electric Corp 画像入力装置
WO2006098360A1 (ja) * 2005-03-15 2006-09-21 Omron Corporation 画像処理装置および画像処理方法、画像処理システム、プログラム、並びに、記録媒体
WO2006103881A1 (ja) * 2005-03-29 2006-10-05 Konica Minolta Photo Imaging, Inc. 撮像装置
JP2007082180A (ja) * 2005-08-16 2007-03-29 Konica Minolta Holdings Inc 撮像装置及び画像処理方法
JP2008289120A (ja) * 2007-04-18 2008-11-27 Panasonic Corp 撮像装置、撮像方法、集積回路およびプログラム
WO2009057478A1 (ja) * 2007-11-01 2009-05-07 Konica Minolta Opto, Inc. 画像処理装置、画像処理方法、及び撮像装置
WO2011155136A1 (ja) * 2010-06-07 2011-12-15 コニカミノルタオプト株式会社 撮像装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9800881B2 (en) 2013-05-07 2017-10-24 Denso Corporation Image processing apparatus and image processing method

Also Published As

Publication number Publication date
US9800881B2 (en) 2017-10-24
CN105190687A (zh) 2015-12-23
DE112014002331T5 (de) 2016-01-21
US20160105679A1 (en) 2016-04-14
JP6064776B2 (ja) 2017-01-25
JP2014219790A (ja) 2014-11-20
CN105190687B (zh) 2017-10-10

Similar Documents

Publication Publication Date Title
JP6064776B2 (ja) 画像処理装置及び画像処理方法
KR101367637B1 (ko) 감시장치
US9906766B2 (en) Imaging device
JP6029954B2 (ja) 撮像装置
US10136080B2 (en) Image generating apparatus
US10298856B2 (en) Imaging device
JP2016126750A (ja) 画像処理システム、画像処理装置、撮像装置、画像処理方法、プログラムおよび記録媒体
JP5861924B2 (ja) 撮像装置
US9131199B2 (en) Imaging apparatus capable of generating an appropriate color image
CN113728619B (zh) 摄像装置以及图像调整方法
JP4089911B2 (ja) 画像入力装置
US10063827B2 (en) Image processing apparatus, imaging apparatus, image processing program, and image processing method
JP4400512B2 (ja) 車載カメラ制御装置
JP2020064052A (ja) 熱画像データをフィルタリングするための方法およびシステム
US8675971B2 (en) Method and apparatus for classifying image pixels
US12375801B2 (en) Camera system, movable apparatus, camera system control method, and storage medium
US12137308B2 (en) Image processing apparatus
WO2012043063A1 (ja) 画像処理装置
US10783619B2 (en) Image generating apparatus for combining plural images based on different shutter times
JP6525723B2 (ja) 撮像装置及びその制御方法、プログラム、並びに記憶媒体
JP2001078204A (ja) 撮像装置
JP2007013687A (ja) 液晶シャッタによるアイリス調整機能付き撮像装置
WO2018047495A1 (ja) 画像処理装置および配光制御システム
JP2013126115A (ja) 信号処理装置、撮像装置

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 201480025880.6

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14795472

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 14889789

Country of ref document: US

WWE Wipo information: entry into national phase

Ref document number: 1120140023310

Country of ref document: DE

Ref document number: 112014002331

Country of ref document: DE

122 Ep: pct application non-entry in european phase

Ref document number: 14795472

Country of ref document: EP

Kind code of ref document: A1