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[Graph program] OTSU方法计算图像二值化的自适应阈值 DL : 0: OTSU方法计算图像二值化的自适应阈值，OTSU 算法可以说是自适应计算单阈值（用来转换灰度图像为二值图像）的简单高效方法。下面的代码最早由 Ryan Dibble提供，此后经过多人Joerg.Schulenburg, R.Z.Liu 等修改，补正。算法对输入的灰度图像的直方图进行分析，将直方图分成两个部分，使得两部分之间的距离最大。划分点就是求得的阈值。都是老外写的，经典哦。-OTSU images calculated value of the two adaptive threshold, OTSU algorithm can be calculated adaptive threshold (for conversion to gray scale images binary images), a simple and efficient manner. The following code from the earliest to provide Ryan Dibble, after a more than Joerg.Schulenburg, R. Z. Liu amend the correction. Algorithm for the importation of gray-scale image histogram analysis of histogram is divided into two parts, Part 2 makes the distance between the largest. Demarcation point out the threshold. Foreigners are written in the classical oh.
Date : 2025-12-22 Size : 2kb User : 陈其星
[Graph program] soulfly DL : 0: 编写MATLAB的M文件，用该文件对采用包络检测法解调的2ASK系统的抗噪声性能进行1000个符号的蒙特卡罗法仿真，画出误码率与信噪比之间的关系曲线，其中信噪比的取值为r＝0dB,2Db,4Db,6dB……10Db,同时画出误码率与信噪比的理论曲线，其中信噪比的取值为r＝0dB,0.1dB,0.2dB,0.3dB……10Db-The preparation of MATLAB M-file, use the document on the use of envelope detection demodulation system 2ASK anti-noise performance of the 1000 Monte Carlo Simulation of symbols, drawn between error rate and signal to noise ratio curve, which SNR value for r = 0dB, 2Db, 4Db, 6dB ... ... 10Db, bit error rate at the same time draw the theoretical curve with the signal to noise ratio, signal to noise ratio value for one of r = 0dB, 0.1dB, 0.2dB , 0.3dB ... ... 10Db
Date : 2025-12-22 Size : 1kb User : 阿宾
[Graph program] 101259378luv_rgb_yuv_lab_space_convert(2) DL : 0: Convert a color image between color representations. B = COLORSPACE(S,A) converts the color representation of image A where S is a string specifying the conversion. S tells the source and destination color spaces, S = dest<-src , or alternatively, S = src->dest . Supported color spaces are RGB R G B Red Green Blue (ITU-R BT.709 gamma-corrected) YPbPr Luma (ITU-R BT.601) + Chroma YCbCr / YCC Luma + Chroma ("digitized" version of Y PbPr) YUV NTSC PAL Y UV Luma + Chroma YIQ NTSC Y IQ Luma + Chroma YDbDr SECAM Y DbDr Luma + Chroma JPEGYCbCr JPEG-Y CbCr Luma + Chroma HSV / HSB Hue Saturation Value/Brightness HSL / HLS / HSI Hue Saturation Luminance/Intensity XYZ CIE XYZ Lab CIE L*a*b* (CIELAB) Luv CIE L*u*v* (CIELUV) Lch CIE L*ch (CIELCH)-Convert a color image between color representations. B = COLORSPACE (S, A) converts the color representation of image A where S is a string specifying the conversion. S tells the source and destination color spaces, S = ' dest <-src' , or alternatively, S = ' src-> dest' . Supported color spaces are ' RGB' R' G' B ' Red Green Blue (ITU-R BT.709 gamma-corrected)' YPbPr ' Luma (ITU-R BT.601 )+ Chroma ' YCbCr' /' YCC' Luma+ Chroma ( " digitized" version of Y' PbPr) ' YUV' NTSC PAL Y' UV Luma+ Chroma ' YIQ' NTSC Y' IQ Luma+ Chroma ' YDbDr' SECAM Y ' DbDr Luma+ Chroma ' JPEGYCbCr' JPEG-Y' CbCr Luma+ Chroma ' HSV' /' HSB' Hue Saturation Value/Brightness' HSL ' /' HLS ' /' HSI ' Hue Saturation Luminance/Intensity' XYZ ' CIE XYZ' Lab ' CIE L* a* b* (CIELAB)' Luv ' CIE L* u* v* (CIELUV)' Lch ' CIE L* ch (CIE
Date : 2025-12-22 Size : 4kb User : 张灯结
[Graph program] 1 DL : 0: 状是含有高层语义信息的视觉特征，在基于内容的图像检索及图像识别中具有重要的应用价值。有很多种描述子可以描述图像的形状特征，傅立叶描述子可以把二维的图像轮廓信息简化成一维问题进行处理，应用非常广泛。然而自然图像的形状特征通常是杂乱的，有噪声的，提出了一种图像预处理方法，得到净化的形状图像，通过实验研究傅立叶描述子算法提取形状特征的效果。-Abstract Shape is a visual feature which contains intrinsic high-level semantics, and has a great application value in CBIR(Content-Based Image Retrieval) and IR(Image Recognition). There are many descriptors for shape feature. Fourier descriptor predigests 2-demensional image information to 1-demensional signal and be used widely. In fact, the shape of natural image is often messy and noisy. So, this paper proposes a preprocessing method which can clean the noisy shape image, and then researches and analyses the shape feature extraction with Fourier descriptor method with an experiment. Keywords Shape, Fourier Descriptor, Feature Extraction, CBIR(Content-Based Image R
Date : 2025-12-22 Size : 100kb User : 倪晓雷