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- 来自专栏计算机视觉理论及其实现
Efficient detection under varying illumination conditions
本文主要研究了不同光照和姿态下的兰伯曲面目标的检测问题。我们提供了一种新的检测方法，该方法通过对训练集中少量图像的不同光照进行建模;这将自动消除光照效果，允许快速的光照不变检测，而不需要创建一个大型的训练集。实验证明，该方法很好地“适应”了之前关于在不同光照下建模物体外观集的工作。在实验中，即使在存在显著阴影的情况下，在45范围内的图像平面旋转和各种不同光照下，也能正确地检测到目标。
70720编辑于 2022-09-02 - 来自专栏Flutter
OpenGL ES 之uniform和varying
varying是GLSL中限定符，varying限定的变量只能在shader之间传递，是Vertex Shader（顶点着色器）的输出，Fragment Shader（片段着色器）的输入，Shader varying定义格式如下： varying float color; 在Vertex Shader中定义varying变量并设置为vec4(1,0,0,1)，代码如下： attribute vec4 vPosition; varying vec4 color; void main() { color= vec4(1,0,0,1); gl_Position = vPosition; } = color; } 与attribute和uniform一样，varying也有数量限制，OpenGL ES 2.0至少支持8个，获取varying的最大个数，代码如下： fun getMaxSupportNum count, 0) return count[0] } varying不仅有个数的限制，还有大小的限制，varying变量最多可以传递32个float数据，或者8个vec4，或者
2.7K21发布于 2020-09-11 - 来自专栏历史专栏
【愚公系列】2024年02月 WEBGL专题-varying变量
一、varying变量 1.varying变量定义 在WebGL中，varying变量是在顶点着色器和片元着色器之间传递数据的一种特殊类型的变量。 在顶点着色器中，varying变量的值被计算并传递到片元着色器中，然后在片元着色器中进行插值，然后被用来确定要绘制的像素的颜色。 2.varying执行流程 在WebGL中，varying变量用于在顶点着色器和片元着色器之间传递数据。它们的执行原理如下： 在顶点着色器中声明一个varying变量，并对其进行赋值。 这个varying变量的值会被传递到片元着色器中。 在片元着色器中，可以通过读取这个varying变量的值来进行后续的计算。 varying变量的执行原理是通过在顶点着色器和片元着色器之间传递数据，使得像素颜色可以根据这些数据进行计算。 3.案例 <!
24600编辑于 2025-05-28 - 来自专栏Path Tracking Letters
论文解读——Autonomous racing using Linear Parameter Varying-Model……
《Autonomous racing using Linear Parameter Varying-Model Predictive Control (LPV-MPC)》是期刊《Control Engineering 采用线性参数可变（Linear Parameter Varying, LPV）理论完成了车辆动力学建模，并提出了可以在线求解的LPV模型预测控制器（LPV-Model Predictive Control
1.6K20发布于 2020-09-01 - 来自专栏翎野君
PostgreSQL 在使用连表语句时报错 ERROR: operator does not exist: bigint = character varying
table_order_item b on a.order_no = b.order_no; 遇到提示：ERROR: operator does not exist: bigint = character varying 解决 这个错误提示是由于在查询中使用了一个 = 操作符，将一个 bigint 类型的列与一个 character varying 类型的列进行了比较，而 PostgreSQL 并没有提供这两个类型之间的默认比较操作符 为了解决这个问题，你可以考虑进行以下两种方法之一： 显式地转换数据类型：使用 CAST 函数将 character varying 列转换为 bigint 类型，例如： select * from table_order
98310编辑于 2024-03-05 - 来自专栏johnhuster
kettle将postgresql数据拷贝到其他postgresql时报“字段 “id“ 的类型为 uuid, 但表达式的类型为 character varying”
pentaho kettle为9.1版本 使用kettle将一个postgresql数据拷贝到另外一个postgresql时报“字段 "id" 的类型为 uuid, 但表达式的类型为 character varying
2.1K10编辑于 2022-03-28 - 来自专栏猿说编程
IOS – OpenGL ES 设置图像锐化 GPUImageSharpenFilter
vec2 textureCoordinate; varying vec2 leftTextureCoordinate; varying vec2 rightTextureCoordinate; varying vec2 topTextureCoordinate; varying vec2 bottomTextureCoordinate; varying float centerMultiplier; varying ; varying highp vec2 topTextureCoordinate; varying highp vec2 bottomTextureCoordinate; varying highp vec2 textureCoordinate; varying vec2 leftTextureCoordinate; varying vec2 rightTextureCoordinate; varying vec2 topTextureCoordinate; varying vec2 bottomTextureCoordinate; varying float centerMultiplier; varying
89330编辑于 2023-03-25 - 来自专栏longzhi的个人博客
抖音樱花
vec3 pposition; varying float psize; varying float palpha; varying float pdist; //varying mat3 rotMat; varying vec3 normX; varying vec3 normY; varying vec3 normZ; varying vec3 normal; varying float diffuse; varying float specular; varying float rstop; varying float distancefade; rotMat; varying vec3 normX; varying vec3 normY; varying vec3 normZ; varying vec3 normal; varying float diffuse; varying float specular; varying float rstop; varying float distancefade;
1.2K10发布于 2021-01-21 - 来自专栏天天P图攻城狮
GPUImage源码解读(四) - 图像锐化
varying vec2 topTextureCoordinate; varying vec2 topLeftTextureCoordinate; varying vec2 topRightTextureCoordinate ; varying vec2 bottomTextureCoordinate; varying vec2 bottomLeftTextureCoordinate; varying vec2 bottomRightTextureCoordinate varying vec2 topTextureCoordinate; varying vec2 topLeftTextureCoordinate; varying vec2 topRightTextureCoordinate varying vec2 topTextureCoordinate; varying vec2 bottomTextureCoordinate; varying float centerMultiplier ; varying highp vec2 topTextureCoordinate; varying highp vec2 bottomTextureCoordinate; varying
3.7K31发布于 2018-12-14 - 来自专栏猿说编程
IOS – OpenGL ES 设置图像黑白噪点 GPUImageLocalBinaryPatternFilter
vec2 textureCoordinate; varying vec2 leftTextureCoordinate; varying vec2 rightTextureCoordinate; varying vec2 topTextureCoordinate; varying vec2 topLeftTextureCoordinate; varying vec2 topRightTextureCoordinate ; varying vec2 bottomTextureCoordinate; varying vec2 bottomLeftTextureCoordinate; varying vec2 bottomRightTextureCoordinate varying vec2 topTextureCoordinate; varying vec2 topLeftTextureCoordinate; varying vec2 topRightTextureCoordinate ; varying vec2 bottomTextureCoordinate; varying vec2 bottomLeftTextureCoordinate; varying vec2 bottomRightTextureCoordinate
52160编辑于 2023-03-25 - 来自专栏猿说编程
IOS – OpenGL ES 设置图像模糊 GPUImageFastBlurFilter
highp float texelWidthOffset; uniform highp float texelHeightOffset; uniform highp float blurSize; varying highp vec2 centerTextureCoordinate; varying highp vec2 oneStepLeftTextureCoordinate; varying highp vec2 twoStepsLeftTextureCoordinate; varying highp vec2 oneStepRightTextureCoordinate; varying highp vec2 highp vec2 centerTextureCoordinate; varying highp vec2 oneStepLeftTextureCoordinate; varying highp vec2 twoStepsLeftTextureCoordinate; n varying highp vec2 oneStepRightTextureCoordinate; varying highp vec2
57510编辑于 2023-03-25 - 来自专栏ATYUN订阅号
(PyStan)零售价格贝叶斯策略建模（下）
az.plot_trace(varying_intercept_fit, var_names = ['sigma_a', 'b']); ? varying_intercept_fit['b'].mean() ? ) varying_slope_fit = sm.sampling(data=varying_slope_data, iter=1000, chains=2) 按照前面的过程，我们将可视化20个类别。 可视化拟合模型： plt.figure(figsize=(10, 6)) xvals = np.arange(2) b = varying_slope_fit['a'].mean() m = varying_slope_fit ) varying_intercept_slope_fit = sm.sampling(data=varying_intercept_slope_data,
72230发布于 2019-09-25 - 来自专栏猿说编程
IOS – OpenGL ES 色彩丢失/模糊效果 GPUImageColorPackingFilter
precision lowp float; uniform sampler2D inputImageTexture; uniform mediump mat3 convolutionMatrix; varying highp vec2 outputTextureCoordinate; varying highp vec2 upperLeftInputTextureCoordinate; varying highp vec2 upperRightInputTextureCoordinate; varying highp vec2 lowerLeftInputTextureCoordinate; varying vec2 outputTextureCoordinate; varying vec2 upperLeftInputTextureCoordinate; varying vec2 upperRightInputTextureCoordinate ; varying vec2 lowerLeftInputTextureCoordinate; varying vec2 lowerRightInputTextureCoordinate; void
45620编辑于 2023-03-26 - 来自专栏猿说编程
IOS – OpenGL ES 调节图像色度 GPUImageHueFilter
highp vec2 outputTextureCoordinate; varying highp vec2 upperLeftInputTextureCoordinate; varying highp vec2 upperRightInputTextureCoordinate; varying highp vec2 lowerLeftInputTextureCoordinate; varying kGPUImageColorAveragingFragmentShaderString = SHADER_STRING ( uniform sampler2D inputImageTexture; varying vec2 outputTextureCoordinate; varying vec2 upperLeftInputTextureCoordinate; varying vec2 upperRightInputTextureCoordinate ; varying vec2 lowerLeftInputTextureCoordinate; varying vec2 lowerRightInputTextureCoordinate; void
34120编辑于 2023-03-21 - 来自专栏猿说编程
GPUImage – 像素平均色值 GPUImageAverageColor
highp vec2 outputTextureCoordinate; varying highp vec2 upperLeftInputTextureCoordinate; varying highp vec2 upperRightInputTextureCoordinate; varying highp vec2 lowerLeftInputTextureCoordinate; varying kGPUImageColorAveragingFragmentShaderString = SHADER_STRING ( uniform sampler2D inputImageTexture; varying vec2 outputTextureCoordinate; varying vec2 upperLeftInputTextureCoordinate; varying vec2 upperRightInputTextureCoordinate ; varying vec2 lowerLeftInputTextureCoordinate; varying vec2 lowerRightInputTextureCoordinate; void
44920编辑于 2023-03-21 - 来自专栏王肖的UT
GLSL-变量和类型
举例： uniform vec4 lightPosition; Varying 限定符 Varying变量是连接Vertex Shader和Fragment Shader的桥梁，Vertex Shader 会为每个Vertex计算颜色、坐标等信息，写入Varying变量。 Vertex Shader可以写Varying变量，也可以读，Fragment Shader只能读Varying变量，不能写。 Vertex Shader中定义的Varying变量必须和Fragment Shader中的定义完全匹配。不能多定义Varying变量，也不能少定义。 Varying变量声明举例： varying vec3 normal; Varying变量不可应用于结构体。 参数限定符 函数的参数可以使用下面的三个参数限定符。
2.3K40发布于 2018-06-19 - 来自专栏跟牛老师一起学WEBGIS
全国航班数据与可视化分析
(30), departure_cy double precision, departure_cx double precision, landing_city character varying (30), landing_cy double precision, landing_cx double precision, mileage character varying(255), flight_schedules character varying(255), airlines character varying(255), aircraft_models character varying(255), departure_time character varying(255), landing_time character varying(255), departure_airport character varying(255), average_delayed character varying(255), is_mon smallint, is_tue smallint
4.2K21发布于 2018-10-23 - 来自专栏HelloCode开发者学习平台
OpenGL ES GLSL滤镜实现(2)
01 — 原图GLSL 实现 顶点着色器代码: attribute vec4 Position; attribute vec2 TextureCoords; varying vec2 TextureCoordsVarying TextureCoordsVarying = TextureCoords; } 片元着色器代码 precision highp float; uniform sampler2D Texture; varying vec4(mask.rgb, 1.0); } 02 — 黑白滤镜 黑白滤镜顶点着色器代码: attribute vec4 Position; attribute vec2 TextureCoords; varying 通道的颜色相加再除以3，再作为rgb通道的值 3.将计算所得颜色值赋值给内建变量gl_FragColor precision highp float; uniform sampler2D Texture; varying 0.2, 0.2, 0.0, 0.0); } 04 — 冷色滤镜 冷色滤镜顶点着色器代码: attribute vec4 Position; attribute vec2 TextureCoords; varying
1.2K20发布于 2019-07-30 - 来自专栏FreeBuf
企业安全之内部代码管理平台Gitlab下载及权限审计
type character varying fingerprint character varying public boolean lastusedat timestamp without time path character varying owner_id integer created_at timestamp without time zone updated_at timestamp without time zone type character varying description character varying avatar character varying membership_lock (510) visibility_level integer archived boolean avatar character varying(510) import_status character varying(510) star_count integer import_type character varying(510) import_source character varying(510
3.5K40发布于 2019-05-17 - 来自专栏IT综合技术分享
组件分享之后端组件——从 postgres 数据库模式生成DOT描述工具dbdot
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id integer title character varying TD> numeric quantity integer state character varying TD colspan="2">users id integer email character varying password character varying details USER-DEFINED< address character varying state character varying 66110编辑于 2022-06-27腾讯云开发者
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