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Image To Lg Converter

(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, intensity = "1.0") {
    // Lg (Logarithmic) Transformation
    // Applies a log base 2 (lg) filter to enhance image details, especially in darker regions.
    
    const canvas = document.createElement('canvas');
    canvas.width = originalImg.width;
    canvas.height = originalImg.height;
    
    const ctx = canvas.getContext('2d');
    ctx.drawImage(originalImg, 0, 0);
    
    const imageData = ctx.getImageData(0, 0, canvas.width, canvas.height);
    const data = imageData.data;
    
    // Parse intensity parameter to a blend factor between 0 and 1
    const blend = Math.max(0, Math.min(1, parseFloat(intensity) || 1));
    
    for (let i = 0; i < data.length; i += 4) {
        const r = data[i];
        const g = data[i + 1];
        const b = data[i + 2];
        
        // Lg (log base 2) mapping: Max input is 255, 1+255 = 256. Math.log2(256) = 8.
        // Therefore, we divide by 8 to normalize to [0, 1], then multiply by 255.
        const lg_r = 255 * (Math.log2(1 + r) / 8);
        const lg_g = 255 * (Math.log2(1 + g) / 8);
        const lg_b = 255 * (Math.log2(1 + b) / 8);
        
        // Blend between the original and the logarithmically transformed pixel using intensity
        data[i]     = (lg_r * blend) + (r * (1 - blend));
        data[i + 1] = (lg_g * blend) + (g * (1 - blend));
        data[i + 2] = (lg_b * blend) + (b * (1 - blend));
        // Alpha channel data[i + 3] remains unchanged
    }
    
    ctx.putImageData(imageData, 0, 0);
    return canvas;
}

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Description

The Image To Lg Converter applies a logarithmic transformation to images to enhance detail, particularly in darker regions. By utilizing a log base 2 filter, the tool expands the dynamic range of low-intensity pixel values, making shadows and obscured details more visible. Users can adjust the intensity of the effect to blend the transformation with the original image. This tool is useful for photographers, researchers, or enthusiasts looking to improve the visibility of dark subjects in low-light photographs or medical imaging.

JavaScript Code (For Advanced Users)

Free Image Tool Creator

Description

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