CAJ | 학술논문

散斑普遍存在于激光显示系统中，严重地影响了画面质量，散斑的测量显得尤为重要。为了确立一套激光显示中散斑测量的方法。文章用散斑对比度作为散斑强弱程度的衡量．采用CCD相机拍照的方法，利用MATLAB进行图像处理，求得散斑对比度的数值。通过大量的实验，分别测量了投影画面的亮度、CCD相机的参数设置等测量参数对散斑对比度数值的影响。通过经验和分析，确定了每个测量参数的取值，提出了一套激光显示中散斑测量的方法，使得测量装置能够最大程度地模拟人眼的视觉效果，真实地反映了散斑对于图像质量的影响。按照这套方法进行散斑测量，不同投影机的散斑对比度在数值上具有可比性，便于评价不同投影机的图像质量。
산반보편존재우격광현시계통중，엄중지영향료화면질량，산반적측량현득우위중요。위료학립일투격광현시중산반측량적방법。문장용산반대비도작위산반강약정도적형량．채용CCD상궤박조적방법，이용MATLAB진행도상처리，구득산반대비도적수치。통과대량적실험，분별측량료투영화면적량도、CCD상궤적삼수설치등측량삼수대산반대비도수치적영향。통과경험화분석，학정료매개측량삼수적취치，제출료일투격광현시중산반측량적방법，사득측량장치능구최대정도지모의인안적시각효과，진실지반영료산반대우도상질량적영향。안조저투방법진행산반측량，불동투영궤적산반대비도재수치상구유가비성，편우평개불동투영궤적도상질량。
For seriously affecting the definition of image, speckle measurement is very important in laser display systems. In order to establish a speckle measurement method in laser display, we use speckle contrast as the scalage of speckle in this paper. Taking photos of the image by CCD camera and doing image processing in MATLAB, we obtain the speckle contrast data. The affection of image brightness, camera parameter setting and other factors were measured through lots of experiments. We set the parameters value to establish a measurement method by analyzing the experiments and experience. Our measurement system can maximally simulate human eyes＇ visual effect. Following this method of speckle measurement, the speckle of different projectors can be compared numerically and the image quality will be evaluated easily.