还有一点要补充的是,读取出的DCT系数是量化后的DCT系数。 1jvirt_barray_ptr *jpeg_read_coefficients (j_decompress_ptr cinfo);23voidjpeg_write_coefficients (j_compress_ptr cinfo, jvirt_barray_ptr * coef_arrays); 上面jvirt_barray_ptr *就是读取DCT系数所返回的值的类型,我们再来看看这个类型是怎...
coef_arrays = jpeg_read_coefficients(&dinfo); }
coef_arraysis a list ofnumpy.ndarrayobjects that represent DCT coefficients of YCbCr channels in JPEG. quant_tablesis a list ofnumpy.ndarrayobjects that represent the quantization tables in JPEG. You can also utilize other variables (one of the simplest ways for finding them is to usedir(img)...
jpeg_simple_progression(&cinfo); cinfo.optimize_coding = TRUE;/* write image */jpeg_write_coefficients(&cinfo, coef_arrays);/* write markers */write_markers(&dinfo,&cinfo); } 开发者ID:BispensGipsGebis,项目名称:jpegoptim,代码行数:66,代码来源:jpegoptim.c 示例4: BugDlg_CompressScreenshot...
通过一个简单的MATLAB程序,展示JPEG图片的DCT系数的读取与写入。 代码片段和文件信息 clear;clc close all %% add RDH path addpath(genpath(‘D:\matlab\IOjpeg\新建文件夹\JPEGread‘));job=jpeg_read(‘test8.jpg‘); Y=job.coef_arrays{1}; U=job.coef_arrays{2}; V=job.coef_arrays{3}; try ...
voidjpeg_write_coefficients(j_compress_ptrcinfo, jvirt_barray_ptr *coef_arrays) voidjpeg_copy_critical_parameters(j_decompress_ptrsrcinfo,j_compress_ptrdstinfo) voidjpeg_abort_compress(j_compress_ptrcinfo) voidjpeg_abort_decompress(j_decompress_ptrcinfo) ...
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jvirt_barray_ptr *coef_arrays =NULL; jpeg_component_info *compptr; JDIMENSION blk_x,blk_y; JBLOCKARRAY buffer; JCOEFPTR bufptr; double*mp, *mptop; /*check the input values*/ if(nrhs !=2)mexErrMsgTxt("Two input arguments required."); ...
src_coef_arrays, &transformoption); #endif/* Finish compression and release memory */ jpeg_finish_compress(&dstinfo); jpeg_destroy_compress(&dstinfo); (void) jpeg_finish_decompress(&srcinfo); jpeg_destroy_decompress(&srcinfo);/* Close output file, if we opened it */ ...
本文整理汇总了C++中jpeg_destroy_compress函数的典型用法代码示例。如果您正苦于以下问题:C++ jpeg_destroy_compress函数的具体用法?C++ jpeg_destroy_compress怎么用?C++ jpeg_destroy_compress使用的例子?那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。