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在ARM7上做图片的JPEG压缩或解压缩 |
作者:coke 栏目:嵌入式系统 |
在ARM7上做图片的JPEG压缩或解压缩. 可否? |
2楼: | >>参与讨论 |
作者: computer00 于 2006/6/1 20:22:00 发布:
可以啊,有啥不可以的?就是速度比较慢而已。 |
3楼: | >>参与讨论 |
作者: coke 于 2006/6/2 9:00:00 发布:
速度没关系. 只要能达到1帧/1S的速度就可以了. 我做JPEG压缩主要是减低RF的频宽问题. 搂上的大侠.怎么能得到你的JPEG压缩方案? |
4楼: | >>参与讨论 |
作者: emblinux 于 2006/6/2 12:27:00 发布:
跑linux吗? 下个libjpeg,有现成的例子。 |
5楼: | >>参与讨论 |
作者: coke 于 2006/6/2 19:26:00 发布:
不跑操作系统. 发射部分ARM7的工作就是从CMOS取图像. 压缩. 发射 接收部分ARM7(9)工作就是接收. 解压. TFT显示. USB传给PC图片. 两个部分除RF部分的物料成本 $50能否拿下来. |
6楼: | >>参与讨论 |
作者: 王紫豪 于 2006/6/2 21:12:00 发布:
用adi bf531多好???? |
7楼: | >>参与讨论 |
作者: xianfei520 于 2006/6/2 21:27:00 发布:
t |
8楼: | >>参与讨论 |
作者: rayxp 于 2006/6/12 12:55:00 发布:
建议走linux,省事 ARM7带mmu,linux内核支持usb摄像头, 下载libjpeg库文件源代码,交叉编译 压缩jpeg有现成的开源程序VideoDog 个人觉得这个方案最省时间,可靠性也强。 你觉得走OS慢点,可以把程序静态编译,Linux内核占用不了多少CPU时间 VideoDog实现了视频采集、保存文件、加入时间戳,jpeg压缩等功能 http://paginas.terra.com.br/informatica/gleicon/VIDEO4linux/VIDEOdog.html ---------------------- VideoDog LATEST RELEASE: 0.31 Check out the docs VideoDog was a kind of VIDEO /bin/cat, to grab a SINGLE frame of a VIDEO4linux DEVICE or set some pictures default. Now it evolved into a complete image capture/processing environment, with a simple and clean API, and using almost no external libs. It works with linux's v4l subsystem, has a lot of algorithms for image processing and storage, including motion detection, ALPHA blending logos, image formats, edge detection, and so on. Also, it includes examples on how to deal with jpeglib, gtk, SDL and XLib, regarding image capture and processing. This code is GPL'ed, feel free to use it and send me tips, patches,etc, etc. As I did heavy modifications to the original VIDEOdog ( splitted the source code, new features ), see README for new examples and CHANGELOG for the changes. Please, send me bug reports, feedbacks, ideas, patches and stuffs. Thanks all the people who sent me patches and feedback ! There is a file explaining something about v4l and VIDEOdog architeture. You can get it here, althought it is shipped with VIDEOdog. |
9楼: | >>参与讨论 |
作者: rayxp 于 2006/6/12 12:56:00 发布:
建议走linux,省事1 ARM7带mmu,linux内核支持usb摄像头, 下载libjpeg库文件源代码,交叉编译 压缩jpeg有现成的开源程序VideoDog 个人觉得这个方案最省时间,可靠性也强。 你觉得走OS慢点,可以把程序静态编译,Linux内核占用不了多少CPU时间 VideoDog实现了视频采集、保存文件、加入时间戳,jpeg压缩等功能 http://paginas.terra.com.br/informatica/gleicon/VIDEO4linux/VIDEOdog.html ---------------------- VideoDog LATEST RELEASE: 0.31 Check out the docs VideoDog was a kind of VIDEO /bin/cat, to grab a SINGLE frame of a VIDEO4linux DEVICE or set some pictures default. Now it evolved into a complete image capture/processing environment, with a simple and clean API, and using almost no external libs. It works with linux's v4l subsystem, has a lot of algorithms for image processing and storage, including motion detection, ALPHA blending logos, image formats, edge detection, and so on. Also, it includes examples on how to deal with jpeglib, gtk, SDL and XLib, regarding image capture and processing. This code is GPL'ed, feel free to use it and send me tips, patches,etc, etc. As I did heavy modifications to the original VIDEOdog ( splitted the source code, new features ), see README for new examples and CHANGELOG for the changes. Please, send me bug reports, feedbacks, ideas, patches and stuffs. Thanks all the people who sent me patches and feedback ! There is a file explaining something about v4l and VIDEOdog architeture. You can get it here, althought it is shipped with VIDEOdog. |
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