[英]Apply blur on BMP pixel RGB array
I'm trying to apply blur effect, but I'm getting totaly wrong colors I'm using Easy_BMP library to load BMP file into pixel array. 我正在尝试应用模糊效果,但是我使用的是Easy_BMP库将BMP文件加载到像素阵列中时,出现了完全错误的颜色。 I try to implement gaussian blur alghoritm with refference to this topic . 我尝试参考该主题来实现高斯模糊算法。 What's wrong ? 怎么了 ?
void blur3x3(int i, int j, RGBApixel** pixelArray, BMP &Image) {
double blurValue = 0.111;
int avgR = 0;
int avgG= 0 ;
int avgB = 0;
int b = 0;
for(int w = i-1 ; w <= i+1 ; w++) {
for(int z = i-1 ; z<=j+1 ; z++) {
avgR = avgR + blurValue*( pixelArray[w][z].Red );
avgG = avgG + blurValue*( pixelArray[w][z].Green );
avgB = avgB + blurValue*( pixelArray[w][z].Blue );
}
}
Image(i,j)->Red = (BYTE) avgR ;
Image(i,j)->Green = (BYTE) avgG;
Image(i,j)->Blue = (BYTE) avgB;
}
bool blur() {
BMP Image;
Image.ReadFromFile(fullFilePath);
int w = Image.TellWidth();
int h = Image.TellHeight();
RGBApixel** pixelArray = new RGBApixel*[w];
for(int i = 0; i < w; ++i)
pixelArray[i] = new RGBApixel[h];
for( int i=0 ; i < Image.TellWidth() ; i++) {
for( int j=0 ; j < Image.TellHeight() ; j++) {
pixelArray[i][j] = Image.GetPixel(i,j);
}
}
for( int i=1 ; i < Image.TellWidth()-1 ; i++) {
for( int j=1 ; j < Image.TellHeight()-1 ; j++) {
blur3x3(i,j, pixelArray, Image);
}
}
Image.SetBitDepth( 32 );
Image.WriteToFile( "/home/kxyz/BMP/gray.bmp" );
}
In for(int z = i-1 ; z<=j+1 ; z++) {
, try changing 在for(int z = i-1 ; z<=j+1 ; z++) {
,尝试更改
int z = i-1
to 至
int z = j-1
Also, you are not deleting any of the arrays you allocate in your blur
function. 另外,您不会删除在blur
函数中分配的任何数组。
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