Abstract: The present invention aims at obtaining a high-quality video signal by reducing tone jumps. A second grayscale conversion characteristic is calculated from a video signal to which a first grayscale conversion process has been applied using a first grayscale conversion characteristic used to convert an M-bit video signal into an N-bit video signal, where M and N are integers and M is larger than N. The second grayscale conversion characteristic is corrected by using the first grayscale conversion characteristic. A second grayscale conversion process is applied to the video signal by using the corrected second grayscale conversion characteristic.

Abstract: The invention provides an image signal processing apparatus, an image signal processing program and an image signal recording medium, each capable of generating high-definition image signals with no or little artifacts. The image signal processing apparatus adapted to implement tone correction of an image signal comprises correction coefficient calculation block (112) for calculating a correction coefficient for a pixel of interest in that image signal and a neighborhood area, transformation block (110) for applying tone correction processing to that pixel of interest, and correction block (111) for using that correction coefficient to make correction of each pixel after that tone correction processing. An image signal of each pixel of interest from correction block (111) is forwarded to compression block (113), and at a time when all image signals are in order, compression processing such as known JPEG is applied to them for their forwarding to output block (114).

Abstract: A digital camera includes: an image capture data creation unit; a CPU for directing the image capture data creation unit to perform image captures several times and acquire a plurality of image capture data; and an image processing device that determines whether or not a common specific image region exists in a plurality of image capture data acquired by the CPU and, in the case where it is determined that a specific image region exists, performs a pixel additive synthesis for image data of the specific image region and creates image data.

Abstract: A positioning device including: a time counter for counting time; a first reception controller (S1) for intermittently receiving time information from the positioning satellite through a reception unit; a time revising unit (S14) for revising the time counted by the time counter based on the received time information; an error calculator (S12, S13) for calculating an error per unit time (“?/?”) in the time counted by the time counter based on the received time information and the time counted by the time counter; a time correcting unit (S4) for calculating corrected time by removing an error from the time counted by the time counter based on the calculated error per unit time (“?/?”); and a positioning unit (S5 to S8) for acquiring a signal of the positioning satellite by using the corrected time and measuring a position of the positioning device based on the acquired signal.

Abstract: When a positioning request is made, position measurement using a positioning satellite is executed, and when the position measurement is executed, positioning result data is obtained as position data responded to the positioning request. On the other hand, when the position measurement using the positioning satellite is not executed, position measurement result data based on the measurement of a moving direction and a moving amount is obtained as position data responded to the positioning request.

Abstract: In a map display device 1, a character string is drawn in a rightward direction from a drawing start point based on ordinary character string data in which the drawing start point is set on the left side of the character string, and a character string is drawn in a leftward direction from a drawing start point based on inverted character string data in which the drawing start point is set on the right side of the character string. As a result, a character string whose right side should be on a predetermined position is set as ordinary character string data and drawn by ordinary character string drawing, and a character string whose left side should be on a predetermined position is set as inverted character string data and drawn by inverted character string drawing.

Abstract: An electronic device 1 receives ephemeris information from a GPS satellite at intermittent timings TE1, TE2, and TE3 and stores the received information in its memory. In addition, the electronic device 1 receives time information at intermittent timings TC1, TC2, TC3, and TC4, and corrects a clocked time based on the received time information. Then, at positioning timing T1, the electronic device 1 captures a transmission signal from the GPS satellite while synchronizing timing with the GPS satellite based on the clocked time, and performs positioning based on the captured transmission signal and the ephemeris information stored in the memory.

Abstract: A digital camera includes: an image capture data creation unit; a CPU for directing the image capture data creation unit to perform image captures several times and acquire a plurality of image capture data; and an image processing device that determines whether or not a common specific image region exists in a plurality of image capture data acquired by the CPU and, in the case where it is determined that a specific image region exists, performs a pixel additive synthesis for image data of the specific image region and creates image data.

Abstract: A positioning device including a movement measuring unit for measuring a relative positional change and a passing position calculation control unit for continuing measurement of the positional change of the movement measuring unit during movement, being given position data of any first point at the first point on a moving route excluding a start point, and determining position data of a point which has been passed before arrival at the first point on the basis of the given position data of the first point and data of the positional change continuously measured by the movement measuring unit.

Abstract: A positioning device for obtaining position data of a plurality of points on a movement route, including a positioning unit that can measure a present position; a movement measuring unit for measuring a relative positional change; a position calculating unit for calculating position data of the plurality of points on the movement route on the basis of position data of a first reference point and positional change data obtained through measurement of the movement measuring unit; and a correcting unit for correcting the position data of at least one of the plurality of points calculated by the position calculating unit on the basis of difference information representing difference between a position represented by the position data calculated by the position calculating unit and a position represented by a positioning result of the positioning unit with respect to any second reference point on the movement route.

Abstract: A plurality of preliminary image signals is acquired by carrying out preliminary image acquisition of a subject, before actual image acquisition, with different amounts of light received by an image acquisition device. Subsequently, a dynamic range and an amount of noise, or an S/N ratio, for a case in which the plurality of preliminary image signals is combined is calculated, and a received-light-level difference of the image acquisition device among a plurality of actual image signals acquired through the actual image acquisition is calculated on the basis of the dynamic range and the amount of noise, or the S/N ratio. Then, by carrying out the actual image acquisition on the basis of the calculated received-light-level difference, a plurality of actual image signals with different received light level is acquired. These actual image signals are combined to acquire a combined image.

Abstract: A plurality of image signals having different exposure levels is acquired; low-frequency components are extracted from each of the image signals to generate a plurality of low-frequency image signals; and the plurality of low-frequency image signals are combined to generate a combined low-frequency image signal. A first image signal is extracted from the plurality of image signals; and high-frequency components are extracted from the first image signal to generate a high-frequency image signal. Then, a combined image signal is generated by combining the combined low-frequency image signal and the high-frequency image signal.

Abstract: A signal processor which performs gradation conversion processing using a histogram of an image signal is provided with a feature calculating unit which calculates a feature of the image signal; an interval setting control unit which sets intervals of a pixel value in the histogram when a histogram of the image signal is obtained, according to the calculated feature, so as to obtain the histogram of the local region of the image signal; a gradation-conversion-characteristic calculating unit which calculates a gradation conversion characteristic, using the histogram obtained by using the intervals set at the interval setting control unit; and a gradation converting unit which performs gradation conversion to the image signal using the gradation conversion characteristic.

Abstract: A digital camera shoots a document plural times from different directions to obtain a plurality of images. An image processing device included in the digital camera corrects the keystone distortion of each image to generate an image which seems as if the document were shot from in front of it. The image processing device synthesizes the images by addition-averaging the pixel values of each pixel in the plurality of corrected images. Even if captured images are illuminated by glare from a light because a document made of glossy paper is shot, the influence of the glare is reduced by addition-averaging the pixel values of each pixel in the plurality of images.

Abstract: A document camera includes a stand and a digital camera attached thereto to be freely detachable, and ensures an electrical connection therebetween at an attaching time. The digital camera is structured to be usable as a single unit. Moreover, a charging circuit is provided in the stand to make it possible to charge the attached digital camera by an external power source. An image obtained by the digital camera or data of the recorded image is transferred to a PC via the stand, and the obtained (recorded) image is projected on a screen by a projector. Moreover, a mode change key, a shutter key, and the like are provided in the stand, making it possible to perform an operation for changing an operation mode, a still image shooting operation and the like in the digital camera and allow an operation from the PC via the stand.

Abstract: A tone conversion unit, when performing tone conversion on an image signal, performs the tone conversion so as to provide a more appropriate tone to a feature area such as a face extracted from the image signal. Specifically, a correction coefficient calculation unit performs multi-resolution decomposition on a specific signal with the extracted feature area, and sets all pixels of low-frequency component to 1, while setting high-frequency components considered to include noise to 0, so as to calculate a correction coefficient. Then, a correction coefficient processing unit performs a processing of multiplying the correction coefficient to the image signal similarly performed with multi-resolution decomposition.

Abstract: The present invention aims at obtaining a high-quality video signal by reducing tone jumps. A second grayscale conversion characteristic is calculated from a video signal to which a first grayscale conversion process has been applied using a first grayscale conversion characteristic used to convert an M-bit video signal into an N-bit video signal, where M and N are integers and M is larger than N. The second grayscale conversion characteristic is corrected by using the first grayscale conversion characteristic. A second grayscale conversion process is applied to the video signal by using the corrected second grayscale conversion characteristic.

Abstract: The present invention aims at obtaining a high-quality video signal by reducing tone jumps. A second grayscale conversion characteristic is calculated from a video signal to which a first grayscale conversion process has been applied using a first grayscale conversion characteristic used to convert an M-bit video signal into an N-bit video signal, where M and N are integers and M is larger than N. The first grayscale conversion characteristic is corrected by using the second grayscale conversion characteristic. The first grayscale conversion process is applied to the video signal by using the corrected first grayscale conversion characteristic.

Abstract: In a digital camera 4, when a shot image is chosen, fractal data expressing structural features of object images in the photographed image is obtained. The fractal data is sent to a search server 2. In the search server 2 are stored plural pieces of fractal data showing structural features of an image of a specific object and keywords expressing specific objects corresponding respectively to the plural pieces of fractal data. The search server 2 searches for images on the Internet 1 using as the keyword corresponding to the fractal data sent from the digital camera 4. Further, the search server 2 obtains fractal data of objects in the searched image, and calculates a degree of coincidence based on the similarity between the obtained fractal data and the fractal data sent from the digital camera 4, and successively sends the digital camera 4 the images whose degree of coincidence is larger than a certain reference.

Abstract: The image-taking apparatus embodied by the invention operates to acquire distance information up to a subject in a pre-taking mode at a distance information acquisition block (1100) provided at a taking control unit (107), thereby setting an area of interest for an image signal at an area-of-interest setting unit (109). The apparatus also figures out a correction coefficient at a correction coefficient calculation unit (111), and uses the correction coefficient at the gray level transformation curve creation block (205) and gray level transformation block (206) provided at the transformation unit (110, 1002) to apply gray level transformation to the image signal.