Image conversion

About: Image conversion is a research topic. Over the lifetime, 2490 publications have been published within this topic receiving 19077 citations.

Device and method for detecting obstacle

Abstract: PROBLEM TO BE SOLVED: To provide an obstacle detecting device which can detect an obstacle, such as a preceding vehicle and a walker, present on a road plane even if the road surface slants or a camera vibrates. SOLUTION: This device is equipped with an image input part 1 which inputs images from a right and a left camera mounted on an automobile, an image storage part 2 which stores the two images inputted from the right and left cameras, an image conversion part 3 which converts the image inputted from one camera to the viewpoint of the other camera by using plural kinds of conversion parameters previously found according to the geometric relation between the cameras and road plane by plural kinds of attitudes selected within the range of attitudes that the cameras can take, an image conversion part 3 which generates plural converted images, and a matching process part 4 which compares the converted image with the image inputted from the other camera by pixels or small areas to find how much the converted image matches the image from the other camera.

Image Converter for Thermal Radiation

Abstract: The development of the phothermionic image converter is described, a device which reproduces scenes by virtue of differences in their thermal radiation. The method uses the principle of projecting a temperature image on a free multilayer film about 0.05 μ thick which contains a photosurface with thermally sensitive yield. Image conversion is achieved by probing the temperature distribution with a flying light spot and displaying synchronously the thermally modulated photocurrent on a monitor. Section 1 discusses the limits of temperature imaging. Under idealized shielding conditions, the relative temperature distributions in the image assume a very simple and general relationship to that of the object, e.g., are equal in radiation equilibrium. Practical heat exchange processes will present other signal limitations which, in combination with the random noise inherent in any conversion process, determine the system performance. Section 2 deals with the experimental work of searching for, and improving on, the phenomena on which the operation of the image converter is based. This includes theory and experiments on temperature sensitive photoelectric yields and on the electrical and optical properties of thin films. Certain components such as sealed crystal windows, cooled radiation shields, and free thin films had to be developed for the image tube. Several models were built and accommodated by suitable optical and electronic systems. When completed, the device had television bandwidth and motion portrayal capabilities and the ability to detect, or image, temperature differences of 10° to 50°C.

Image synthesizing device and image conversion device for synthesizing and displaying an NTSC or other interlaced image in any region of a VCA or other non-interlaced image

Abstract: Provided is an image synthesizing device with which a specific display region P of a sub-image is synthesized and displayed within a specific display region Q of a main image displayed on a display 9 , wherein this image synthesizing device comprises a frame memory with which the data in the synthesis and display region P out of the sub-image data is continuously stored in the order of input, after which the stored sub-image data is read out when the scanning address of the main image data is an address corresponding to the display region Q, and a selector 4 with which the main image data displayed on the display 9 and the sub-image data continuously and sequentially read out from the frame memory are inputted, and when the scanning address of the main image data is an address corresponding to the display region Q, the selected channel is switched from main image data to the sub-image data and outputted to the display 9 where this sub-image data is displayed, which allows the capacity of the frame memory used for image synthesis to be smaller, and allows the sub-image to be reduced or magnified at the desired scale factor.

Parametric Image Conversion: Part I

Abstract: We consider frequency‐doubling image conversion of a brilliant object by self‐interaction of its radiation within a nonlinear material. We have demonstrated that by placing the nonlinear material in the image plane of a lens, high‐resolution, three‐dimensional image conversion can be achieved, whereas for other positions of the nonlinear material crosstalk noise can be so severe as to make the resultant image unrecognizable. We have developed a theory of this type of image conversion which uses the formalism of Fourier optics. This theory is applied to a case which is very similar to more general image converters and this case is experimentally demonstrated.

Method and apparatus for telecine image conversion

Abstract: An input telecine image is held by a field memory, and correlation values of respective images in a first field and a second field are calculated by correlation value calculation circuits. The correlation values are compared with a predetermined threshold value, and when the correlation value is smaller than the threshold value, a duplicated field is determined. Moreover, the correlation values of the first and second fields are compared in the correlation value comparison circuits, and the duplicated fields are determined. These information are held by a phase holding circuit. A phase pattern of a successive images converted by a 3:2 pulldown method is searched by a phase synchronization circuit on the basis of the information of phase obtained by the phase holding circuit. A control unit inversely converts automatically the telecine image including successive images converted by a method different from the 3:2 pulldown method to a film image.