摘要:
Interpolation data for a missing pixel are obtained (4) after a correction (3) for variations in the characteristics of the imaging devices (8(1), 8(2)). The correction for variations in characteristics includes, for example, a black level correction (9) and a sensitivity correction (10). The interpolation includes, for example, interpolation calculations (14(1), 14(2)) such that a mean value of a plurality of pixels including the missing pixel and a mean value of a plurality of pixels not including the missing pixel become equal and an interpolation calculation (14(0)) that takes the mean of the pixels to the right and left of the missing pixel, the calculation with the least error being selected (13, 15). Thus missing pixels in highly periodic images can be properly interpolated, and interpolation can be performed with high precision even when there are variations in the sensitivity characteristics of the individual imaging devices constituting the contact image sensor.
摘要:
There is provided a scanning line interpolation device which is capable of providing an interpolated image with increased reproducibility of vertical high-frequency components in a still picture part. Preceding-field image data is stored in a field memory, and thereafter reference pixels which are located in an interpolation pixel position and its surrounding positions and required for interpolation are extracted from the preceding-field image data stored in the field memory and current-field image data. An inter-field motion judgement portion detects whether or not there is a motion of an image between preceding and current fields based on the extracted reference pixels. If the inter-field motion judgement portion detects that there is a motion, a selection circuit selects in-field interpolation data calculated in an in-field interpolation value calculation circuit from the current-field image data among the reference pixels. If the inter-field judgement portion detects that there is no motion, the selection circuit selects the preceding-field image data located in the interpolation pixel position among the reference pixels. Then, the selection circuit outputs the selected data as interpolation pixel image data.
摘要:
Interpolation data for a missing pixel are obtained (4) after a correction (3) for variations in the characteristics of the imaging devices (8(1), 8(2)). The correction for variations in characteristics includes, for example, a black level correction (9) and a sensitivity correction (10). The interpolation includes, for example, interpolation calculations (14(1), 14(2)) such that a mean value of a plurality of pixels including the missing pixel and a mean value of a plurality of pixels not including the missing pixel become equal and an interpolation calculation (14(0)) that takes the mean of the pixels to the right and left of the missing pixel, the calculation with the least error being selected (13, 15). Thus missing pixels in highly periodic images can be properly interpolated, and interpolation can be performed with high precision even when there are variations in the sensitivity characteristics of the individual imaging devices constituting the contact image sensor.
摘要:
To solve the problem that when a space with a set width is inserted after each character to regularize the spaces between characters the overall character spacing is widened, making text less easy to read, there are provided a character control code storage unit (5) for storing, for each character display position, a character control code (CTD) including a character code (CC) and character width data (CW), and a positional control unit (4) for reading the character control code (CTD) for the present character display position from the character control code storage unit (5), and controlling the occurrence interval of the present character display position according to the character width data (CW) in the character control code (5) that was read and the previous character display position.
摘要:
An apparatus includes an edge width detection circuit (1) which detects an edge portion of image data (DI) and outputs an edge width (W) of the detected edge portion, a ratio control amount generation circuit (2) which generates a ratio control amount (ZC) in accordance with the edge width (W), a ratio generation circuit (3) which generates a conversion ratio (Z) in accordance with the ratio control amount (ZC), and a pixel number conversion circuit (4) which performs a conversion of pixel number of the image data (DI) using the conversion ratio (Z), thereby enhancing sharpness of the edge portion in proper quantities.
摘要:
An apparatus and method are disclosed for displaying an image having high frequency components. The image is displayed on a display device that includes a plurality of display elements arranged in both horizontal and vertical directions. The display elements represent colors, such as red, green and blue. A pixel data generator generates for each display element first pixel data corresponding to the luminance levels of red, green and blue colors in the image. A smoothing filter eliminates false colors in the image by applying weighting coefficients to the first pixel data to modify the luminance levels of the first pixel data, thereby producing second pixel data having second color element data corresponding to luminance levels of the respective colors. Each display element of the display is driven in accordance with the second color element data.
摘要:
With a plasma display panel, an object of the present invention is to suppress luminance in black display without deteriorating picture quality and to suppress pseudo contouring of moving picture, while suppressing cost of the plasma display panel. According to a plasma display panel driving method of the present invention, a plurality of discharge sustain periods for displaying equal luminance level are successively defined in a given period in one field to reduce the amount of shift of the center of luminance, and address periods for selecting arbitrary display cells on the screen are comprised of two kinds of address periods: a write address period and an erase address period.
摘要:
An apparatus includes an edge width detection circuit which detects an edge portion of image data and outputs an edge width of the detected edge portion, a ratio control amount generation circuit which generates a ration control amount in accordance with the edge width, a ratio generation circuit which generates a conversion ratio in accordance with the ratio control amount, and a pixel number conversion circuit which performs a conversion of pixel number of the image data using the conversion ratio, thereby enhancing sharpness of the edge portion in proper quantities.
摘要:
An object of the present invention is to provide an image processing apparatus and image processing method capable of obtaining better picture quality by appropriately improving the sharpness of edges of an image. In order to achieve the object, the image processing apparatus comprises a zoom ratio control means for detecting edges in image data and generating zoom ratio control values according to the widths of the detected edges; an edge width correction means for correcting the edge widths by carrying out an interpolation process on the image data according to the zoom ratio control values; an enhancement value calculation means for detecting high frequency components of the image data with the corrected edge widths, and calculating enhancement values for enhancing the edges of the image data according to the detected high frequency components; and an edge enhancement means for enhancing the edges of the image data by adding the enhancement values to the image data with the corrected edge widths.
摘要:
An image is processed by detecting pixel-to-pixel variations in brightness level, generating high spatial frequency information related to the variations, setting interpolation points with a spacing that varies according to the high spatial frequency information, and generating new pixels by interpolation at the interpolation points. By increasing the zoom ratio in one part and reducing the zoom in another part of each edge in a continuous manner, this method can mitigate edge degradation when an image is enlarged or reduced, without introducing discontinuities or other image artifacts. It also provides a convenient way to adjust edge sharpness in an image.