Digital camera

About: Digital camera is a research topic. Over the lifetime, 12169 publications have been published within this topic receiving 137431 citations. The topic is also known as: digicam & digital still camera.

Estimating and using relative head pose and camera field-of-view

Abstract: A video or still hand-held digital camera is activated or controlled based on estimation of a user head pose or gaze direction. The system comprises uses two wearable devices associated with right and left sides of the user body, each comprises an RF beacon. The head pose or gaze detection is estimated by comparing the signal strength (such as RSSI) or the phase of the RF signals from the wearable devices at the digital camera device. An angular deviation between the head pose (or gaze detection) and the digital camera (such as the line of sight) is estimated, and the digital camera is activated or controlled based on comparing the angular deviation to a set threshold. The RF signals may be Personal Area Network (PAN) signals, such as Bluetooth Low Energy (BLE) signals. The wearable devices may be head mounted, structured as glasses, earpieces, headphones, or hat mounted.

Digital image sensing apparatus, image processing system, and digital image sensing method

Abstract: A digital camera is provided with an optical filter unit 43 which is movable in the slide direction SL in front of the CCD 41 , and infrared light emitters 25 and 32 for emitting near-infrared light. The optical filter 43 has an infrared cut filter 45 for cutting light in the infrared range, and a visible light cut filter for selectively transmitting light of the infrared range by cutting light in the visible light range. While maintaining the identicalness of the main object, the infrared cut filter 45 is disposed above the CCD 41 to acquire visible light image data via the CCD 41 , and the object is irradiated with infrared light emitted from the infrared emitters 25 and 32 , and the visible light cut filter is disposed above the CCD 41 to acquire infrared image data, i.e., non-visible light image data, by the CCD 41 . As a result, a visible light image and a non-visible light image are easily acquired of the same object.

Digital camera having image transfer method and system

Abstract: A digital camera is provided that has image transfer capabilities. When the transfer of an image is desired, a user selects an image transfer option via a user interface. A transfer logic allows a user to search and select one or more images from memory and select one or more destination addresses for each image. An RF transceiver circuit and antenna establish communication with a portable proximity device having a compatible RF transceiver. The images are transferred to the proximity device which in turn establishes communication with a network. The images are then transmitted to the network which distributes the images to their respective destination addresses, for example, to e-mail addresses. With the present invention, images or other data can be transmitted to a recipient from any location as long as a proximity device is available.

Joint demosaicing and denoising

Abstract: The output image of a digital camera is subject to a severe degradation due to noise in the image sensor. This paper proposes a novel technique to combine demosaicing and denoising procedures systematically into a single operation by exploiting their obvious similarities. We first design a filter as if we are optimally estimating a pixel value from a noisy single-color image. With additional constraints, we show that the same filter coefficients are appropriate for CFA interpolation (demosaicing) given noisy sensor data. The proposed technique can combine many existing denoising algorithms with the demosaicing operation. In this paper, a total least squares denoising method is used to demonstrate the concept. The algorithm is tested on color images with pseudo-random noise and on raw sensor data from a real CMOS digital camera that we calibrated. The experimental results confirm that the proposed method suppresses noise (CMOS image sensor noise model) while effectively interpolating the missing pixel components, demonstrating a significant improvement in image quality when compared to treating demosaicing and denoising problems independently.

Secure digital photography system

Abstract: A digital camera includes a memory to store image data of a captured image representing a scene in the physical world, and an encryption module configured to digitally sign the image data prior to storage using a private key of an asymmetric key pair and to obtain metadata associated with the image data. The digital camera is communicatively coupled to a digital photography subsystem. The host-based subsystem includes a decryption module to accept image data and metadata from the digital camera and to verify the digital signature of the image data to determine authenticity of the captured image represented by the image data using a public key of the asymmetric key pair, and a viewer module to display the image data when the decryption module indicates the image data is authentic. Metadata used in assisting a determination of authenticity may include at least one of date and time the image was captured by the digital camera, at least one of name and identifier of the camera owner, at least one of name and identifier of the photographer, focal distance, white levels, f-stop, brightness compensation, and distance for auto-focus, when the image was captured.