Most of the time I 've been studying usb cameras recently. By the way, I 've written jpg encoding to most of the following functions. I 've searched for them online and changed them a little bit. But it takes a lot of time to find these functions.
Most of the time in the recent study of the USB camera by the way the JPG code is also written on the following most of the functions I found on the internet and then a little change can be used, but to find these functions cost a lot of time JPG
In the previous article, we finally talked about a function that directly converts yuv to jpg, but the conversion was not successful. The original function is yuv420 to jpg.
The yuv420 scan sequence is as follows:
YYYY
YYYY
UVUV
The yuv422 line scan
The code is as follows
Copy Code
Original image $DST = "/upload/20120914/20120914040740-0.jpg"; Note that the picture path should be correct Get the original picture information $DST _info = getimagesize ($DST); Switch ($DST _info[2]
In the end, we said a function that directly converts YUV to JPG, but the conversion is not successful. The original function is the research of yuv420 to JPG.yuv420 the sequence of interlaced scanning is like thisYYYYYYYYUvuvAnd the yuv422 sequence
Examples include libgif, LibPNG, and libjpeg. Image types are judged as follows. fdata is the first address of image data.
// PNGIf (! Png_sig_cmp (png_byte *) fdata, (png_size_t) 0, 4 )){Return en_img_tyie_png;}// GIFIf (memcmp (gif_stamp, fdata,
ImageMagick is a powerful, stable, and free toolset and development kit that can be used to read, write, and process picture files in more than 185 basic formats, including popular TIFF, JPEG, GIF, PNG, PDF, and PHOTOCD formats. With ImageMagick,
This article illustrates the method of Php_imagick to realize picture shearing, rotating, sharpening, subtractive or adding special effects. Share to everyone for your reference. The specific analysis is as follows:
A php extension that allows PHP
This article mainly describes the function of the following functions:
(1) Cvsobel
(2) Cvconvertscaleabs
(3) Cvcvtcolor
First, let's take a look at how the computer detects edges. Take the gray image as an example, its theoretical basis is this, if
1. display the 10 processes that consume the most memory/CPU psaux | sort-nk + 4 | tailpsaux | sort-nk + 3 | tail2. view the processes in the ascending order of memory ps-e- o & quot; % C: % p: % z: % a & quot; | sort-k5-nr3. ps-e-o & quot; % C: 1.
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