| #------------------------------------------------------------- |
| # |
| # Licensed to the Apache Software Foundation (ASF) under one |
| # or more contributor license agreements. See the NOTICE file |
| # distributed with this work for additional information |
| # regarding copyright ownership. The ASF licenses this file |
| # to you under the Apache License, Version 2.0 (the |
| # "License"); you may not use this file except in compliance |
| # with the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, |
| # software distributed under the License is distributed on an |
| # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| # KIND, either express or implied. See the License for the |
| # specific language governing permissions and limitations |
| # under the License. |
| # |
| #------------------------------------------------------------- |
| |
| args = commandArgs(TRUE) |
| options(digits=22) |
| library("Matrix") |
| |
| adjustBrightness = function(M, val, chan_max) |
| { |
| out = matrix(0, nrow(M), ncol(M)); |
| for( i in 1:ncol(M) ) |
| { |
| col = as.vector(M[,i]) |
| #col = rev(col); |
| col = pmax(0, pmin(col + val, chan_max)) |
| out[,i] = col; |
| } |
| return(out) |
| } |
| |
| A = as.matrix(readMM(paste(args[1], "A.mtx", sep=""))) |
| #print(paste("input dim:", toString(dim(X)),sep=" ")) |
| #print(X) |
| |
| #B = pmax(0, pmin(A + 123, 255)) |
| B = adjustBrightness(A, 123, 255) |
| |
| writeMM(as(B, "CsparseMatrix"), paste(args[2], "B", sep="")); |
| #print(paste("output Bx dim:", toString(dim(Bx)), sep=" ")) |
| #print(Bx) |