JRockit VM works with Harmony class library!

BEA宣布发布JRockit VM H27.2.1版本,该版本适用于与Apache Harmony类库配合使用。此版本是针对Windows/IA32平台的32位Java SE 5规范的部分实现。BEA希望通过这一举措支持Harmony项目,推动其成为完整的Java实现。
Yesterday, BEA announced JRockit VM for evaluation with Harmony class library on Windows/IA32. Below is the BEA's announcement on Harmony mailing list:

From:TuvaPalm [ mailto:tpalm@bea.com ]
Sent:den
30 januari 2007 10 : 39
To:'dev@harmony.apache.org'
Subject:JRockitH27
.2.1 forHarmonyClassLibraryreleasednow

WehavefollowedtheApacheHarmonyprojectsinceitsinception
, and
areimpressedbytherapidprogresstheprojecthasmade.Wearenow
makingaversionofJRockitadaptedtoworkwithHarmonyavailableto
thecommunitytohelptheHarmonyprojectprogresstowardsbeinga
fullJavaimplementation
, andtohelpusunderstandtheissues
involvedinmakingourJVMmoregeneric.

JROCKITH27
.2.1 FORHARMONYCLASSLIBRARYRELEASEDNOW

TheJRockitH27
.2.1 releaseisa 32 -bitpartialimplementationofthe
JavaStandardEditionVersion
5 SpecificationforWindowsonIntel
architecturethatworkswithHarmonyClassLibrary.Thissoftwareis
notapartoftheApacheHarmonyproject
, andisbeinglicensedto
youforevaluationpurposesonly.Ifyouhaveanyquestionsregarding
JRockitorthisreleasepleasevisitourforums.

DownloadtheJRockitH27
.2.1 at

http://dev2dev.bea.com/jrockit/jrockitVM

VisittheBEAJRockitforums

http://forums.bea.com(jrockit.developer.interest
.general)

fordiscussionsregardingJRockit.

Regards
,

Tuva

TuvaPalm
, MSc
ProgramManager
tuva.palm@bea.com
BEASystems
JavaRuntimeProductsGroup

Really awesome, BEA, this will be very helpful to Harmony developers!

Some background:

Modularization is one key objective of Harmony project, and it is key enablement tocommunity innovation on Java SE technology. Harmony class library is separated to 20+ modules, and JVM/Classlib is also decoupled by a well designed VMI(Virtual Machine Interface), JVM implementation is "compatible" with Harmony(i.e., can work with Harmony class library) as long as it implements this VMI, which includes several native APIs as well as 23 Java classes, besides standard JNI and JVMTI. Harmony is also trying to provide a Classpath adapter to work with GNU Classpath compatible JVM.

Currently there are several JVMs supporting Harmony VMI. JRockit is the second production VM, after IBM J9 VM, the light weighted SableVM and Harmony's own DRLVM are open source alternatives.
一种基于有效视角点方法的相机位姿估计MATLAB实现方案 该算法通过建立三维空间点与二维图像点之间的几何对应关系,实现相机外部参数的精确求解。其核心原理在于将三维控制点表示为四个虚拟基点的加权组合,从而将非线性优化问题转化为线性方程组的求解过程。 具体实现步骤包含以下关键环节:首先对输入的三维世界坐标点进行归一化预处理,以提升数值计算的稳定性。随后构建包含四个虚拟基点的参考坐标系,并通过奇异值分解确定各三维点在该基坐标系下的齐次坐标表示。接下来建立二维图像点与三维基坐标之间的投影方程,形成线性约束系统。通过求解该线性系统获得虚拟基点在相机坐标系下的初步坐标估计。 在获得基础解后,需执行高斯-牛顿迭代优化以进一步提高估计精度。该过程通过最小化重投影误差来优化相机旋转矩阵和平移向量。最终输出包含完整的相机外参矩阵,其中旋转部分采用正交化处理确保满足旋转矩阵的约束条件。 该实现方案特别注重数值稳定性处理,包括适当的坐标缩放、矩阵条件数检测以及迭代收敛判断机制。算法能够有效处理噪声干扰下的位姿估计问题,为计算机视觉中的三维重建、目标跟踪等应用提供可靠的技术基础。 资源来源于网络分享,仅用于学习交流使用,请勿用于商业,如有侵权请联系我删除!
评论
成就一亿技术人!
拼手气红包6.0元
还能输入1000个字符
 
红包 添加红包
表情包 插入表情
 条评论被折叠 查看
添加红包

请填写红包祝福语或标题

红包个数最小为10个

红包金额最低5元

当前余额3.43前往充值 >
需支付:10.00
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包
实付
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明:

1.余额是钱包充值的虚拟货币,按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载,可以购买VIP、付费专栏及课程。

余额充值