One way to form digital images is through coding. The codes below could be used

Question

One way to form digital images is through coding. The codes below could be used for a digital RGB image.

Var texSize = 64

Var numRows = 8

Var numCols = 8

Var numComponents = 4

Var myImage = new Uint8Array (numComponents*textSize*texSize);

var image1 = new Uint8Array (4*texSize*texSize);

    for ( var i = 0; i < texSize; i++) {

         for (var j = 0; j <texSize; j++) {

              var patchx = Math.floor(i/(texSize/numRows));

              var patchy = Math.floor(j/(texSize/numCols));

              if (patchx%2^patchy%2) c = 255;

              else c = 0;

              //c = 255*(((i & 0x8) == 0) ^ ((j & 0x8) == 0))

              image1 [4*i*texSize+4*j] = c;

              image1 [4*i*texSize+4*j+1] = c;

              image1 [4*i*texSuze+4*j+2] = c;

              image1 [4*i*texSuze+4*j+3] = 255;

      }

}

a) Explain what the first four code lines represent

b) What is the code expected to do?

c) How does geometric pipeline differ from the digital pipeline?

Explanation / Answer

Please Let me know if you need more information:-

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a) Explain what the first four code lines represent

b) What is the code expected to do?

c) How does geometric pipeline differ from the digital pipeline?

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Var texSize = 64 //Declaration of variables for image values calculation.

Var numRows = 8

Var numCols = 8

Var numComponents = 4

Var myImage = new Uint8Array (numComponents*textSize*texSize);
var myInage = new Uint8Array(4*64*64);

var myInage = new Uint8Array(16384);

----> Uint8Array an array of 8-bit unsigned integers.
all values will be initialized to 0. Once array created, you can reference elements in the array using the object's methods, or using bracket notation

--> var image1 = new Uint8Array (4*texSize*texSize); //Same as above declaration

for ( var i = 0; i < texSize; i++) { //Loop repeates for 64 times as texSize =64

for (var j = 0; j <texSize; j++) { //Inner For Loop will also repeats for 64 times.

var patchx = Math.floor(i/(texSize/numRows)); i=0;texSize=64 ; numRows=8

(0/63/8) -- > 0

1/64/8 -->0
......................etc

floor() method rounds a number downwards to the nearest integer, and returns the result

After all calclations:-

image1 [4*i*texSize+4*j] = c;

              image1 [4*i*texSize+4*j+1] = c;

              image1 [4*i*texSuze+4*j+2] = c;

              image1 [4*i*texSuze+4*j+3] = 255;

Making image pixel values into array using the above four lines

geometry pipelin --> is first stage in computer graphics systems which perform image generation based on geometric models.

digital pipeline --> it's latest technology for image generation based on digital models.

Thanks

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