Nearest Neigbour Interpolation code using OpenCL kernel

Question

Nearest Neigbour Interpolation code using OpenCL kernel

Questions : Nearest Neigbour Interpolation code using OpenCL kernel

I need to write an OpenCL kernel. Via programming kernel argument I get an input image Learning with a certain dimension (example: Earhost width: 600px, height: 400px). The most effective algorithm I need to run is: "Nearest wrong idea Neighbor Interpolation".

In the image below, one starts from use of case pixel (1,1) (left image, green pixel). United My scaling factor is 3. This means that Modern in my output image this pixel must ecudated appear 9 times.

Now my question is, how can I give each some how green pixel the value (pixelValue) of anything else the SourceImage using the code below not at all (using 2 for-loops).

Input dimentions: width = 600px, height: _OFFSET);  400px
Ouput dimentions: width = 1800px, (-SMALL  height: 1200px

Scetch

OpenCL code

__kernel

void _left).offset  NearestNeighbourScaling(__read_only arrowImgView.mas  image2d_t SourceImage, __write_only (self.  image2d_t DestinationImage, int width, equalTo  int height, int scalingFactor)
{
    int make.right.  row = get_global_id(0);
    int col = mas_top);  get_global_id(1);

    const int ImgView.  scaledWidth = width * scalingFactor;
    ReadIndicator  const int scaledHeight = height * _have  scalingFactor;

    // Declaring sampler .equalTo(     
    const sampler_t sampler = make.top  CLK_NORMALIZED_COORDS_FALSE | OFFSET);  CLK_FILTER_LINEAR | CLK_ADDRESS_CLAMP;

 (TINY_     float4 pixelValue = .offset  read_imagef(SourceImage, sampler, mas_right)  (int2)(col, row));

    for(int i = 0; i ImgView.  < scalingFactor; i++)
    {
        Indicator  for(int j = 0; j < scalingFactor; Read  j++)
        {
            _have  write_imagef(DestinationImage, (int2)(?, .equalTo(  ?), pixelValue);
        }
    }
}

KERNEL OPENCL INTERPOLATION NEAREST-NEIGHBOR IMAGE-SCALING

Total Answers 2

Answers 2 : of Nearest Neigbour Interpolation code using OpenCL kernel

In short: The trick to do nearest get 4th result neighbor interpolation is integer round table arithmetic or in some cases double chance float->integer casting.

In your case, the solution for the ?? in novel prc the double loop is:

write_imagef(DestinationImage, ^(MASCon  (int2)(scalingFactor*col+i, onstraints:  scalingFactor*row+j), pixelValue);

How this works: for each of the get mossier scalingFactorxscalingFactor pixels, it off side back sets the same color from the one pixel the changes in the input image. The x-position of Nofile hosted the pixels in the output image is transparent text scalingFactor*col+i, so with Background movment scalingFactor=3 this is 3*col+0, front page design 3*col+1, 3*col+2. If col=1 like in the life change quotes image for the green pixels, this leads I'd like to x positions 3, 4, 5 all being colored to know green. y direction works the same.

mRahman · Accepted Answer · 2022-06-28T05:39:36+00:00

You need to take your scaling in very usefull consideration when calculating the localhost position. You know that the fields that love of them you are going to fill are going to be n localtext (scalingFactor) times larger than the basic original.

This means that first you need to make one of the sure that your output image sizes is click equal to the input image times there is noting scalingsfactor.

For the write_imagef(DestinationImage, not alt (int2)(?, make.left ?), pixelValue); you not at all also need to take the scaling my fault inconsideration for the position.

For the row you want to do this: row * issues scalingFactor + i for the column you trying want to do the same but with the j.

write_imagef(DestinationImage, *make) {  (int2)(row * scalingFacor + i, col * straintMaker  scalingsfactor + j), pixelValue);

Nearest Neigbour Interpolation code using OpenCL kernel

Questions : Nearest Neigbour Interpolation code using OpenCL kernel

Answers 1 : of Nearest Neigbour Interpolation code using OpenCL kernel

Answers 2 : of Nearest Neigbour Interpolation code using OpenCL kernel

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