尽管NeRF可以渲染出高质量的新视角图像,但前提是有高质量的图像作为输入以及精确的相机参数。而一旦输入的图像有明显缺陷时,原始的NeRF就难以实现高质量的渲染。过去已经有一部分工作在围绕NeRF与有缺陷的输入图像来展开,NeRF-W针对场景亮度的变化和移动的物体;Mip-NeRF针对不同分辨率的输入图像;SCNeRF主要针对输入图像的畸变。
These scenes, produced by the USGS, contain calibrated at-sensor radiance, ortho-rectified and terrain Double Coefficient used for radiance conversion GAIN_COEFFICIENT_B04 Double Coefficient used for radiance Double Coefficient used for radiance conversion GAIN_COEFFICIENT_B07 Double Coefficient used for radiance Double Coefficient used for radiance conversion GAIN_COEFFICIENT_B10 Double Coefficient used for radiance Double Coefficient used for radiance conversion GAIN_COEFFICIENT_B13 Double Coefficient used for radiance
RADIANCE_MAXIMUM_BAND_1 Double Maximum achievable spectral radiance value for Band 1. RADIANCE_MAXIMUM_BAND_2 Double Maximum achievable spectral radiance value for Band 2. RADIANCE_MAXIMUM_BAND_3 Double Maximum achievable spectral radiance value for Band 3. VCID 1 DN to radiance. VCID 2 DN to radiance.
RADIANCE_MAXIMUM_BAND_1 Double Maximum achievable spectral radiance value for Band 1. RADIANCE_MAXIMUM_BAND_2 Double Maximum achievable spectral radiance value for Band 2. RADIANCE_MAXIMUM_BAND_3 Double Maximum achievable spectral radiance value for Band 3. VCID 1 DN to radiance. VCID 2 DN to radiance.
RADIANCE_ADD_BAND_1 Double Additive rescaling factor used to convert calibrated DN to radiance for Band RADIANCE_ADD_BAND_2 Double Additive rescaling factor used to convert calibrated DN to radiance for Band RADIANCE_ADD_BAND_3 Double Additive rescaling factor used to convert calibrated DN to radiance for Band radiance. radiance.
RADIANCE_ADD_BAND_1 Double Additive rescaling factor used to convert calibrated DN to radiance for Band RADIANCE_ADD_BAND_2 Double Additive rescaling factor used to convert calibrated DN to radiance for Band RADIANCE_ADD_BAND_3 Double Additive rescaling factor used to convert calibrated DN to radiance for Band radiance. radiance.
RADIANCE_ADD_BAND_1 Double Additive rescaling factor used to convert calibrated DN to radiance for Band RADIANCE_ADD_BAND_2 Double Additive rescaling factor used to convert calibrated DN to radiance for Band RADIANCE_ADD_BAND_3 Double Additive rescaling factor used to convert calibrated DN to radiance for Band RADIANCE_ADD_BAND_4 Double Additive rescaling factor used to convert calibrated DN to radiance for Band RADIANCE_ADD_BAND_5 Double Additive rescaling factor used to convert calibrated DN to radiance for Band
RADIANCE_ADD_BAND_1 Double Additive rescaling factor used to convert calibrated DN to radiance for Band RADIANCE_ADD_BAND_2 Double Additive rescaling factor used to convert calibrated DN to radiance for Band RADIANCE_ADD_BAND_3 Double Additive rescaling factor used to convert calibrated DN to radiance for Band radiance. radiance.
_1 RADIANCE_ADD_BAND_1 RADIANCE_ADD_BAND_2 RADIANCE_ADD_BAND_2 RADIANCE_ADD_BAND_3 RADIANCE_ADD_BAND_ 3 RADIANCE_ADD_BAND_4 RADIANCE_ADD_BAND_4 RADIANCE_ADD_BAND_5 RADIANCE_ADD_BAND_5 RADIANCE_ADD_BAND_6 RADIANCE_MULT_BAND_1 RADIANCE_MULT_BAND_1 RADIANCE_MULT_BAND_2 RADIANCE_MULT_BAND_2 RADIANCE_MULT_BAND _4 RADIANCE_ADD_BAND_4 RADIANCE_ADD_BAND_5 RADIANCE_ADD_BAND_5 RADIANCE_ADD_BAND_6 RADIANCE_ADD_BAND_ 6 RADIANCE_ADD_BAND_7 RADIANCE_ADD_BAND_7 RADIANCE_MULT_BAND_4 RADIANCE_MULT_BAND_4 RADIANCE_MULT_BAND
RADIANCE_MAXIMUM_BAND_1 Double Maximum achievable spectral radiance value for Band 1. RADIANCE_MAXIMUM_BAND_2 Double Maximum achievable spectral radiance value for Band 2. RADIANCE_MAXIMUM_BAND_3 Double Maximum achievable spectral radiance value for Band 3. VCID 1 DN to radiance. VCID 2 DN to radiance.
,接受到的能量有多少需要发射出去,往哪个方向方向,BRDF就是这个radiance和irradiance和比例 反射方程 对于BRDF我们说是对于给定方向的入射的光通量然后规定这个出射的radiance 的方向和大小,那实际上这个物体上的单位面积它可能不止接收到来着一个方向的这个入射的radiance,那实际上如果我要去描述这个物体出射的radiance应该对所有方向来的radiance做一个积分,这个就是所谓的反射方程 ,现在我忘记这个推导的过程,我从这个渲染方程本身去理解这个全局光照是怎么实现的 对于只有一个点光源的情况,那就是我这个物体发射的radiance就等于我本身会发射的radiance加上反射点光源发射的radiance ,是不是就把这个面的radiance对它所覆盖的立体角做一个积分就行了 那实际上接收到的光还有可能来着其他物体反射的光,这个怎么处理呢,那我就直接统一把接收的radiance当作是其他物体这个出射的radiance 就行了 解渲染方程 那怎么解这个渲染方程呢,从我们最后给出的方程可以看出,未知的只有物体本身的出射radiance和接收到的来着其他物体的出射radiance,而这两个radiance实际上是一个东西是不是
AirMSPI_CalWater-2_Terrain-projected_Georegistered_Radiance_Data 简介 AirMSPI_CalWater-2_Terrain-projected_Georegistered_Radiance_Data 摘要 AirMSPI_CalWater-2_Terrain-projected_Georegistered_Radiance_Data是一个数据集,其中包含了通过Airborne Multiangle AirMSPI_CalWater-2_Terrain-projected_Georegistered_Radiance_Data数据可以被应用于多个领域,包括地表特征识别、大气光学模拟和气象预测等。 AirMSPI version 6 terrain-projected georegistered radiance product acquired during the CalWater-2 flight Retrieved from https://doi.org/10.5067/AIRCRAFT/AIRMSPI/CALWATER-2/RADIANCE/TERRAIN_V006
有了如上的定义,我们则可以描述这样的一个过程,当光源向四面八方辐射能量(radiant Intensity),然后在任何一个表面,会接收到的能量(irradiance),以及在这个传播过程中光线的能量(radiance Radiance Radiance对应能量在单位立体角且在单位面积上的分布。Radiance用于描述光线传输中的能量分布,我们确定一个微表面,再确定一个方向,这样可以描述对应的光线携带的能量。 : 这样,我们可以通过radiance和intensity,以及irradiance之间建立关联: Exiting radiance则相当于一个微表面dA下对应的intensity(方向ω上射出的能量 ): Incident radiance相当于仅考虑从某一个方向ω射入的irradiance( 上的能量): 同理,不难理解radiance和irradiance之间的关系,当我们考虑从各个方向进来的 radiance,对其积分求和,最终得到整个 表面的irradiance: 这里, 是该微表面对应的半球。
RADIANCE_ADD_BAND_1 Double Additive rescaling factor used to convert calibrated DN to radiance for Band RADIANCE_ADD_BAND_2 Double Additive rescaling factor used to convert calibrated DN to radiance for Band RADIANCE_ADD_BAND_3 Double Additive rescaling factor used to convert calibrated DN to radiance for Band RADIANCE_ADD_BAND_4 Double Additive rescaling factor used to convert calibrated DN to radiance for Band RADIANCE_ADD_BAND_5 Double Additive rescaling factor used to convert calibrated DN to radiance for Band
RADIANCE_ADD_BAND_1 Double Additive rescaling factor used to convert calibrated DN to radiance for Band RADIANCE_ADD_BAND_2 Double Additive rescaling factor used to convert calibrated DN to radiance for Band RADIANCE_ADD_BAND_3 Double Additive rescaling factor used to convert calibrated DN to radiance for Band RADIANCE_ADD_BAND_4 Double Additive rescaling factor used to convert calibrated DN to radiance for Band RADIANCE_ADD_BAND_5 Double Additive rescaling factor used to convert calibrated DN to radiance for Band
我的设置如下: export SNAP_HOME=/Applications/snap 最后,我们再继续进行测试,终于看到输出结果了: ['radiance_1', 'radiance_2', 'radiance _3', 'radiance_4', 'radiance_5', 'radiance_6', 'radiance_7', 'radiance_8', 'radiance_9', 'radiance_10 ', 'radiance_11', 'radiance_12', 'radiance_13', 'radiance_14', 'radiance_15', 'l1_flags', 'detector_index
前一篇我们讲了如何通过radiance描述一条光线携带的能量,本篇主要解释这些碰撞引起的光线状态变化,以及如何计算radiance在这个过程中的变化。 如上图,在这个过程中,我们可以理解为来自方向 的光线(radiance),打到物体表面的某一个微表面 ,能量被该表面吸收后又以方向 发射出一条光线(radiance)。 这里,这个微表面 接收到来自 方向的光线的能量,对应radiance和irradiance的转换: 而从该微表面 以 方向射出的光线的能量,则记为 (相对于 )。 点微表面的irradiance,经过 转为反射光的radiance,对这个过程做一个半球积分,则可以得到反射光 的radiance。 这个是积分微分方程,如上图,在 到 的光路中,每一个点都有一定概率发生如上的碰撞,我们取 ,公式1左边是指radiance在 方向的变化,对两边求积分。
RADIANCE_ADD_BAND_1 Double Additive rescaling factor used to convert calibrated DN to radiance for Band RADIANCE_ADD_BAND_2 Double Additive rescaling factor used to convert calibrated DN to radiance for Band RADIANCE_ADD_BAND_3 Double Additive rescaling factor used to convert calibrated DN to radiance for Band radiance. radiance.
It is designed to retrieve the spectral distribution of upwelling radiance just above the sea surface (the water-leaving radiance). , red tide W m^-2 sr^-1 μm^-1 510nm/10nm 0.01009526 Oa06_radiance Chlorophyll reference (Chl minimum) W m^-2 sr^-1 μm^-1 560nm/10nm 0.0123538 Oa07_radiance Sediment loading W m^-2 sr^-1 μm^-1 620nm/10nm ', 'Oa06_radiance', 'Oa04_radiance']) .median() // Convert to radiance units
HDF_FILR_URL) EV_1KM_Emissive = file.select('EV_1KM_RefSB') attributes = EV_1KM_Emissive.attributes()#获取属性 radiance_scales = attributes['radiance_scales']#辐亮度缩放尺度 radiance_offsets = attributes['radiance_offsets']##辐亮度偏移值 reflectance_scales attributes['reflectance_scales']#反射率缩放尺度 reflectance_offsets = attributes['reflectance_scales']#反射率偏移值 print(radiance_scales ) print(radiance_offsets) print(reflectance_scales) print(reflectance_offsets) 发布者:全栈程序员栈长,转载请注明出处:https