vb jpeg编码这是一个比较完整的JPEG压缩程序,支持 彩色/灰度、Y分量水平/垂直采样律、图像质量 调整。使用的是最简单的基线系统(BaseLine)压缩方式,量化表及Huffman表都是与ACDSee一致的,没有提供自适应Huffman表压缩功能。-vb jpeg coding This is a relatively complete JPEG compression process, support for color / grayscale, Y component level / vertical sampling law, image quality adjustment. The use of the most simple baseline system (BaseLine) compression method to quantify the Huffman table and the table with ACDSee are the same, and did not provide adaptive Huffman compression table. Update : 2008-10-13
Size : 83.96kb
Publisher : 王宇
vb jpeg编码这是一个比较完整的JPEG压缩程序,支持 彩色/灰度、Y分量水平/垂直采样律、图像质量 调整。使用的是最简单的基线系统(BaseLine)压缩方式,量化表及Huffman表都是与ACDSee一致的,没有提供自适应Huffman表压缩功能。-vb jpeg coding This is a relatively complete JPEG compression process, support for color/grayscale, Y component level/vertical sampling law, image quality adjustment. The use of the most simple baseline system (BaseLine) compression method to quantify the Huffman table and the table with ACDSee are the same, and did not provide adaptive Huffman compression table. Update : 2025-04-04
Size : 84kb
Publisher : 王宇
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 Update : 2025-04-04
Size : 4kb
Publisher : 张灯结
这是一个比较完整的JPEG压缩程序,支持 彩色/灰度、Y分量水平/垂直采
样律、图像质量 调整。使用的是最简单的基线系统(BaseLine)压缩方式,
量化表及Huffman表都是与ACDSee一致的,没有提供自适应Huffman表压缩功能。-This is a more complete JPEG compression process, support for color/grayscale, Y component horizontal/vertical sampling law, image quality adjustments. Using the most simple baseline system (BaseLine) compression, quantization tables and Huffman tables are consistent with ACDSee, did not provide adaptive Huffman table compression. Update : 2025-04-04
Size : 85kb
Publisher : 向晓阳
使用JPEG库将从摄像头得到的YUV格式数据缓冲区转换为JPG文件的示例代码.-example of how to convert YUV data from camera to JPG file using libjpeg Update : 2025-04-04
Size : 1kb
Publisher : 不知道
给予matlab的JPEG压缩程序,包含原始压缩图片,程序对灰度bmp图片进行JEPG编码,压缩成以0101形式的编码。JPEG编码先把图象色彩RBG变成亮度Y和色度Cr、Cb,它利用人的视觉对色度不敏感的特点,减少一部分色度数据,以达到压缩。 JPEG采取多种编码方式,包含有行程编码(Run Length Coding)和哈夫曼(Huffman)编码,有很高的压缩比。在编码前,先对数据进行分块,离散余弦变换(DCT)及量化,保留能量大的低频信号,丢弃高频信号以达到压缩。-Given to the JPEG compression matlab program, contains the original compressed image, the program of the grayscale bmp picture JEPG encoded, compressed into a 0101 form of encoding. RBG color coded JPEG image into a first luminance Y and chrominance Cr, Cb, which uses the human visual characteristics is not sensitive to the color, reduce the number of color data to achieve compression. Take a variety of JPEG encoding, includes length coding (Run Length Coding) and Huffman (Huffman) coding, a high compression ratio. In the code before the data block, discrete cosine transform (DCT) and quantization, to retain a large low-frequency signal energy, discarding high-frequency signals in order to achieve compression. Update : 2025-04-04
Size : 171kb
Publisher :
Codificación JPEG, aplicaciones y teoría de comprensión de la misma-Codificación JPEG, aplicaciones y teoría de comprensión de la misma.. Update : 2025-04-04
Size : 291kb
Publisher : Ian
JPEG采用的是YCrCb颜色空间,而BMP采用的是RGB颜色空间,要想对BMP图片进行压缩,首先需要进行颜色空间的转换。YCrCb颜色空间中,Y代表亮度,Cr,Cb则代表色度和饱和度(也有人将Cb,Cr两者统称为色度),三者通常以Y,U,V来表示-JPEG is used in YCrCb color space, and BMP is used in RGB color space, to compress the BMP image, we need to perform color space conversion. In YCrCb color space, Y represents the brightness, Cr, Cb represents the hue and saturation (there are Cb, Cr both collectively referred to as chroma), three Y as usual, U, V. Update : 2025-04-04
Size : 362kb
Publisher : sdf3
vc++ 获得指定像素点的颜色,如演示截图所示,用户可以用鼠标左键单击图片的某一处时,就会在图片的右侧以该点颜色填充一个实心的矩形。实现方法通过函数COLORREF CDC::GetPixel( int x, int y)可以得到指定点的颜色,其参数x、y 是指定点的坐标。-When vc + + to get the color of the specified pixel, as shown in the demo screenshot, users can use the left mouse button click on the picture of a place, the picture will be on the right side to the point of a solid color fill rectangle. Implementation through the function COLORREF CDC :: GetPixel (int x, int y) can be color specified point, the parameters x, y coordinates of the specified point. Update : 2025-04-04
Size : 385kb
Publisher : heyonghui
CodeBus is one of the largest source code repositories on the Internet!