Image signal processing apparatus and image signal processing program product

• US 10,382,694 B2
• Filed: 07/24/2015
• Issued: 08/13/2019
• Est. Priority Date: 08/05/2014
• Status: Expired due to Fees

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Hasegawa, Takaomi, Hashizume, Takashi
• Primary Examiner(s): Anyikire, Chikaodili E
• Application Number:
  US15/501,211
• Publication Number:
  US 20180091740A1
• Time in Patent Office: 1,481 Days
• Field of Search: None
• CPC Class Codes: B60R 2300/30 characterised by the type of image processing
• CPC Class Codes: G09G 2340/10 Mixing of images, i.e. displayed pixel being the result of an operation, e.g. adding, on the corresponding input pixels
• CPC Class Codes: G09G 2340/12 Overlay of images, i.e. displayed pixel being the result of switching between the corresponding input pixels
• CPC Class Codes: G09G 2340/125 wherein one of the images is motion video
• CPC Class Codes: G09G 2340/14 Solving problems related to the presentation of information to be displayed
• CPC Class Codes: G09G 2370/12 Use of DVI or HDMI protocol in interfaces along the display data pipeline
• CPC Class Codes: G09G 2380/10 Automotive applications
• CPC Class Codes: G09G 5/00 Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators image data processing or generation, in general G06T
• CPC Class Codes: G09G 5/02 characterised by the way in which colour is displayed details of colour display specific for CRTs G09G1/28; specific for flat matrix panels other than liquid crystal displays G09G3/2003; specific for liquid crystal displays G09G3/3607
• CPC Class Codes: G09G 5/12 Synchronisation between the display unit and other units, e.g. other display units, video-disc players
• CPC Class Codes: G09G 5/14 Display of multiple viewports
• CPC Class Codes: H04N 19/136 Incoming video signal characteristics or properties
• CPC Class Codes: H04N 23/64 Computer-aided capture of images, e.g. transfer from script file into camera, check of taken image quality, advice or proposal for image composition or decision on when to take image
• CPC Class Codes: H04N 7/18 Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
• CPC Class Codes: H04N 7/183 for receiving images from a single remote source

Abstract

An image signal processing apparatus includes a first control unit, a second control unit starting activation when the first control unit completes activation and shifting from off-state to normal operating state, and a decoding unit. The second control unit processes an image included in a received image signal, and outputs an image signal including a processed image. The second control unit outputs, after starting the activation, a synchronization signal to the decoding unit even before completion of activation. The second control unit outputs, after the completion of activation, image signal including the processed image in conformity to the synchronization signal. Before the image signal including the processed image is transmitted from the second control unit, the decoding unit outputs the image signal transmitted from an image capturing unit bypassing the second control unit to the display unit in conformity to the synchronization signal outputted from the second control unit.

Claims

1. An image signal processing apparatus comprising:

a first control unit starting an activation in response to an activation request;

a second control unit starting an activation when the first control unit completes the activation and shifting from an off-state to a normal operating state after the activation is completed, wherein the second control unit processes, in the normal operating state, an image included in an image signal in response to a reception of the image signal from an image capturing unit, and outputs an image signal including a processed image; and

a decoding unit starting an activation when the first control unit completes the activation and shifting from an off-state to a normal operating state after the activation is completed, wherein

the decoding unit;

receives, in the normal operating state, the image signal including an unprocessed image and transmitted from the image capturing unit bypassing the second control unit, and the image signal including the processed image and transmitted from the image capturing unit through the second control unit;

outputs, to a display unit, one of the image signals that are received; and

controls the display unit to display one of the unprocessed image or the processed image,

when the second control unit starts the activation, the second control unit outputs a synchronization signal to the decoding unit even before completing of the activation,

when the second control unit completes the activation, the second control unit outputs the image signal including the processed image in conformity to the synchronization signal, and

during a period before the decoding unit receives the image signal including the processed image from the second control unit, the decoding unit outputs, to the display unit, the image signal transmitted from the image capturing unit bypassing the second control unit in conformity to the synchronization signal outputted from the second control unit.

2. The image signal processing apparatus according to claim 1, wherein

the second control unit receives, from the image capturing unit, the image signal including an image acquired by the image capturing unit and indicating a rear side of a vehicle.

3. The image signal processing apparatus according to claim 2, wherein

the second control unit on-screen draws guide lines and a button key to generate the processed image.

5. The image signal processing apparatus according to claim 1, wherein

the decoding unit includes a synchronizing circuit in which the synchronization signal output from the second control unit is input,

during a period from the second control unit starts the activation until the second control unit completes the activation, the decoding unit outputs, to the display unit, the image signal transmitted from the image capturing unit bypassing the second control unit and including an unprocessed image from the synchronizing circuit in conformity to the synchronization signal, and

after the second control unit completes the activation and outputs the image signal including the processed image in conformity to the synchronization unit, the decoding unit switch the image signal output from the synchronizing circuit to the display unit from the image signal including the unprocessed image and being in conformity to the synchronization signal to the image signal including the processed image and being in conformity to the synchronization signal.

4. An image signal processing program product stored in a computer-readable non-transitory tangible storage medium, comprising instructions to be executed by a computer included in an image signal processing apparatus, wherein the image signal processing apparatus includes:

a first control unit starting an activation in response to an activation request;

a second control unit starting an activation when the first control unit completes the activation and shifting from an off-state to a normal operating state after the activation is completed, wherein the second control unit processes, in the normal operating state, an image included in an image signal in response to a reception of the image signal from an image capturing unit, and outputs an image signal including a processed image; and

a decoding unit starting an activation when the first control unit completes the activation and shifting from an off-state to a normal operating state after the activation is completed, wherein the decoding unit receives, in the normal operating state, the image signal including an unprocessed image and transmitted from the image capturing unit bypassing the second control unit, and the image signal including the processed image and transmitted from the image capturing unit through the second control unit, outputs one of the image signals that are received to a display unit, and controls the display unit to display one of the unprocessed image or the processed image,

the instructions comprising;

after starting the activation, controlling the second control unit to output a synchronization signal to the decoding unit even before the second control unit completes the activation;

controlling the second control unit to determine whether the second control unit has completed the activation; and

controlling the second control unit to output the image signal including the processed image in conformity to the synchronization signal when determining that the second control unit has completed the activation.

6. The image signal processing program product according to claim 4, wherein

the decoding unit includes a synchronizing circuit in which the synchronization signal output from the second control unit is input,

the instructions further comprising:

during a period from the second control unit starts the activation until the second control unit completes the activation, controlling the decoding unit to output, to the display unit, the image signal including the unprocessed image from the synchronizing circuit in conformity to the synchronization signal; and

after the second control unit completes the activation and outputs the image signal including the processed image in conformity to the synchronization unit, controlling the decoding unit to switch the image signal output from the synchronizing circuit to the display unit from the image signal including the unprocessed image and being in conformity to the synchronization signal to the image signal including the processed image and being in conformity to the synchronization signal.