Binary Image Processor

himanshi Gupta — Tue, 03 Sep 2024 06:27:58 +0000

let's create a

Binary Image Processor.

Project Overview:
Create a web application that allows users to upload an image, manipulate the binary data of the image, and then save the modified image. The app will enable users to apply various effects like grayscale, inversion, and brightness adjustment by directly modifying the image’s binary data.
key features:

file upload
binary manipulation
image preview
download image option

we'll be using HTML,CSS, AND JAVASCRIPT

html:

Binary Image Processor

<input type="file" name="" id="fileinput" accept="image/*">
<br>
<button id="grayscalebtn">Apply GrayScale</button>
<button id="invertbtn">Apply Inversion</button>
<button id="brightnessbtn">Apply Brightness</button>
<input type="range" name="" id="brightnessrange" min="-100" max="100" value="0">
<br>
<canvas id="canvas"></canvas>
<br>
<button id="downloadbtn">Download Image</button>`

## css:

*{ background-color: rgb(160, 226, 204); } body { font-family: Arial, sans-serif; text-align: center; padding: 20px; } #canvas { border: 1px solid #000; margin-top: 20px; }

javascript:

`document.getElementById('grayscalebtn').addEventListener('click', applyGrayscale);
document.getElementById('invertbtn').addEventListener('click', applyInversion);

const brightnessRange = document.getElementById('brightnessbtn');
brightnessRange.addEventListener('input', () => {
ctx.putImageData(originalImageData, 0, 0); // Reset to original before applying brightness
adjustBrightness(Number(brightnessRange.value));
});

document.getElementById('downloadbtn').addEventListener('click', () => {
const link = document.createElement('a');
link.download = 'modified-image.png';
link.href = canvas.toDataURL();
link.click();
});

    const fileinput = document.getElementById('fileinput');
    const canvas =  document.getElementById('canvas');
    const ctx = canvas.getContext('2d');
    let originalImageData;
    fileinput.addEventListener('change',(event)=>{
        const file = event.target.files[0];
        const reader = new FileReader();

        reader.onload = function(e){
            const img = new Image();
            img.onload = function(){
                canvas.width = img.width;
                canvas.height = img.height;
                ctx.drawImage(img,0,0);
                originalImageData = ctx.getImageData(0,0,canvas.width,canvas.height);

            }
            img.src = e.target.result;
        }
        reader.readAsDataURL(file);
    })
    function applyGrayscale() {
let imageData = ctx.getImageData(0, 0, canvas.width, canvas.height);
let data = imageData.data;

for (let i = 0; i < data.length; i += 4) {
    const r = data[i];
    const g = data[i + 1];
    const b = data[i + 2];
    const grayscale = r * 0.3 + g * 0.59 + b * 0.11;
    data[i] = data[i + 1] = data[i + 2] = grayscale;
}

ctx.putImageData(imageData, 0, 0);

}
function applyInversion() {
let imageData = ctx.getImageData(0, 0, canvas.width, canvas.height);
let data = imageData.data;

for (let i = 0; i < data.length; i += 4) {
    data[i] = 255 - data[i];       // Red
    data[i + 1] = 255 - data[i + 1]; // Green
    data[i + 2] = 255 - data[i + 2]; // Blue
}

ctx.putImageData(imageData, 0, 0);

}
function adjustBrightness(value) {
let imageData = ctx.getImageData(0, 0, canvas.width, canvas.height);
let data = imageData.data;

for (let i = 0; i < data.length; i += 4) {
    data[i] += value;       // Red
    data[i + 1] += value;   // Green
    data[i + 2] += value;   // Blue
}

ctx.putImageData(imageData, 0, 0);

}
`

The output for this is shown below:

Image Gallery with Full-Screen Viewer

himanshi Gupta — Mon, 02 Sep 2024 09:13:11 +0000

let's create an image gallery with full-screen viewer.
for this topics you need to cover are:
javascript basics
javascript dom manipulation
javascript window.open() and window.close() methods

We'll be having a image gallery, having thumbnail images.
and each thumbnail image will be having a 'view full screen' button'

when the user will click on button a new screen will open showing the image on full screen.

the user can close the full-screen and return to the gallery.

below given is the implementation:

index.html:
`

viewFullScreen

<div class="image-item">
  <img src="https://tse1.mm.bing.net/th?id=OIP.VyeGOidyaY2qOUtlJD55BgHaFE&pid=Api&P=0&h=180" alt="">
  <button onclick="viewFullScreen('https://tse1.mm.bing.net/th?id=OIP.VyeGOidyaY2qOUtlJD55BgHaFE&pid=Api&P=0&h=180')">viewFullScreen</button>
</div>

<div class="image-item">
  <img src="https://tse2.mm.bing.net/th?id=OIP._s4_i4HP9aomqEkBlQK8IgHaJQ&pid=Api&P=0&h=180" alt="">
  <button onclick="viewFullScreen('https://tse2.mm.bing.net/th?id=OIP._s4_i4HP9aomqEkBlQK8IgHaJQ&pid=Api&P=0&h=180')">viewFullScreen</button>
</div>

<div class="image-item">
  <img src="https://tse4.mm.bing.net/th?id=OIP.awCvJ1gReYh4tWseENeY8AHaE_&pid=Api&P=0&h=180" alt="">
  <button onclick="viewFullScreen('https://tse4.mm.bing.net/th?id=OIP.awCvJ1gReYh4tWseENeY8AHaE_&pid=Api&P=0&h=180')">viewFullScreens</button>
</div>

sript.js

style.css
#gallery{ display: flex; flex-wrap: wrap; gap: 10px; } .image-item{ position: relative; width: 150px; } .image-item img{ width: 100%; border-radius: 5px; } .image-item button{ position: absolute; bottom: 5px; left: 50%; transform: translateX(-50%); background-color: rgba(0,0,0,0.5); color: white; border: none; padding: 5px; cursor: pointer; }

The result of the above implementation is:

Forem: himanshi Gupta

Binary Image Processor