Method for calibrating uniformity of digital printing
A correction method and uniformity technology, applied in image data processing, filling planes with attributes, instruments, etc., can solve problems such as uneven distribution of pixels in digital photos, and achieve the effect of improving uniformity, improving uniformity, and achieving significant effects.
Inactive Publication Date: 2008-10-15
SHANGHAI LIEBOLD TECH
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[0003] The purpose of the present invention is to solve the uneven distribution of existing digital photo pixels, and to provide a digital printing uniformity correction method that can improve the uniformity of the photo pixels printed by the digital exposure system. High-definition, high-quality color photos with a pixel uniformity of over 90%
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[0077] The working principle of the digital printing uniformity correction method of the present invention: use the sample digital photos printed by e-filming digital exposure equipment as the data source, divide the regions, and obtain the difference between the numerical value of each region and the overall average value, Corresponding reverse correction is carried out on the digital photos before exposure and printing, so as to improve the uniformity of the printed digital photos. In the following embodiments of the present invention, the pixel of the color photo is based on three colors red, green and blue, and the model of displaying color on the video monitor is called the RGB color model, and is described by a cube defined by the R, G, and B coordinate axes In this model, each color point in the cube is represented by a triplet (R, G, B), where R represents the red component value of the color, G represents the green component value of the color, and B represents the blu...
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A method for calibrating the uniformity of the digital photo development is characterized in that the method comprises making the data of sample digital photo of step 1, creating the calibrating file of a new digital photo of step 2, calibrating and exposing the new digital photo of step 3, checking the uniformity calibrating result of step 4 and accumulating the several calibrations of uniformity of step 5. The sample digital photo developed using the relevant functional modules of a computer and the digital exposing apparatus is used as a data source, divided into several areas to obtain the difference between the value of each area and the overall average value and modified in reverse direction correspondingly before exposed and developed to improve the uniformity of the developed photo, the effect being significant. The measurement confirms that the uniformities of red, green and blue colors reach 90%, 93% and 92%, being increased by 26%, 29% and 23% respectively, compared with the photo exposed and developed in a way other than the uniformity calibrating method.
Description
technical field [0001] The invention relates to a digital printing uniformity correction method for improving the pixel uniformity of digital photos. Background technique [0002] The existing Lihpao digital color photo printing equipment e-filming (e-filming) uses the world's latest image chip-microcrystalline display chip as the imaging source, and is equipped with an optical-mechanical system, digital image drive circuit, and operating software. Exposure equipment, which can be attached to the traditional color expansion machine, can be regarded as an electronic film holder, which can be replaced with the color film holder, making the traditional color expansion equipment a dual-purpose color expansion equipment that can print both color film and digital photos. This equipment is better than CRT and other imaging methods in terms of definition, contrast, anti-shake, etc., and the cost is lower; The poor uniformity of digital photos affects the quality of digitally printe...
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IPC IPC(8): G06K9/03G06T11/40G06T5/50
Inventor 朱汝平陈云祥朱宗升朱毅徐思远张志坚毛晓雯
Owner SHANGHAI LIEBOLD TECH