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Image Lee Medium Stopper 6-Stop ND Filter Effect Tool

(Free & Supports Bulk Upload)

The result will appear here...

JavaScript Code (For Advanced Users)

You can edit the below JavaScript code to customize the image tool.

function processImage(originalImg) {
    const canvas = document.createElement('canvas');
    const ctx = canvas.getContext('2d');

    // Ensure using intrinsic dimensions of the image
    // It's assumed originalImg is loaded, so naturalWidth/Height are available.
    const width = originalImg.naturalWidth || originalImg.width;
    const height = originalImg.naturalHeight || originalImg.height;

    canvas.width = width;
    canvas.height = height;

    // Draw the original image onto the canvas
    ctx.drawImage(originalImg, 0, 0, width, height);

    // Get the pixel data from the canvas
    // Guard against 0x0 canvas if image wasn't loaded or has no dimensions
    if (width === 0 || height === 0) {
        // Return an empty canvas or handle as an error appropriately
        // For now, returning the (empty) canvas.
        return canvas;
    }
    const imageData = ctx.getImageData(0, 0, width, height);
    const data = imageData.data;

    // A 6-stop ND filter reduces light by a factor of 2^6 = 64.
    // This means the amount of light reaching the sensor is 1/64th of the original.
    const reductionFactor = 64;

    // Iterate through each pixel (R, G, B, A components)
    for (let i = 0; i < data.length; i += 4) {
        // Reduce Red, Green, and Blue components
        // Math.floor is used to ensure integer pixel values.
        data[i] = Math.floor(data[i] / reductionFactor);         // Red
        data[i + 1] = Math.floor(data[i + 1] / reductionFactor); // Green
        data[i + 2] = Math.floor(data[i + 2] / reductionFactor); // Blue
        // Alpha channel (data[i + 3]) remains unchanged
    }

    // Put the modified pixel data back onto the canvas
    ctx.putImageData(imageData, 0, 0);

    return canvas;
}

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Description

The Image Lee Medium Stopper 6-Stop ND Filter Effect Tool allows users to apply a simulated 6-stop neutral density (ND) filter effect to images. By reducing the overall exposure of the image by a factor of 64, this tool can help create effects such as motion blur in moving subjects, smoothen water surfaces, or enable wider apertures in bright conditions. It’s ideal for photographers and content creators looking to mimic the effects of physical ND filters without the need for additional equipment.

JavaScript Code (For Advanced Users)

Free Image Tool Creator

Description

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