Anamorphic Desqueeze Calculator

Anamorphic Desqueeze Calculator

Use this calculator to determine the effective resolution and aspect ratio of your anamorphic footage after desqueezing, and to calculate the optimal crop for a desired final aspect ratio.

1.33x 1.5x 1.8x 2.0x Custom
No Target (Show Full Desqueezed) 2.39:1 (Cinemascope) 2.40:1 1.78:1 (16:9) 1.85:1 (Flat) 1.66:1 (European Flat) Custom
function toggleCustomInput(selectId, inputId) { var selectElement = document.getElementById(selectId); var inputElement = document.getElementById(inputId); if (selectElement.value === 'custom') { inputElement.style.display = 'inline-block'; inputElement.setAttribute('required', 'true'); } else { inputElement.style.display = 'none'; inputElement.removeAttribute('required'); } } function calculateAnamorphicDesqueeze() { var recordedWidth = parseFloat(document.getElementById('recordedWidth').value); var recordedHeight = parseFloat(document.getElementById('recordedHeight').value); var squeezeRatioSelect = document.getElementById('squeezeRatioSelect').value; var squeezeRatio; if (squeezeRatioSelect === 'custom') { squeezeRatio = parseFloat(document.getElementById('customSqueezeRatioInput').value); } else { squeezeRatio = parseFloat(squeezeRatioSelect); } var targetAspectRatioSelect = document.getElementById('targetAspectRatioSelect').value; var targetAspectRatio; var hasTargetAR = false; if (targetAspectRatioSelect === 'custom') { targetAspectRatio = parseFloat(document.getElementById('customTargetAspectRatioInput').value); hasTargetAR = true; } else if (targetAspectRatioSelect !== 'none') { targetAspectRatio = parseFloat(targetAspectRatioSelect); hasTargetAR = true; } // Input validation if (isNaN(recordedWidth) || recordedWidth <= 0 || isNaN(recordedHeight) || recordedHeight <= 0 || isNaN(squeezeRatio) || squeezeRatio <= 0) { document.getElementById('result').innerHTML = 'Please enter valid positive numbers for all required fields.'; return; } if (hasTargetAR && (isNaN(targetAspectRatio) || targetAspectRatio <= 0)) { document.getElementById('result').innerHTML = 'Please enter a valid positive number for the custom target aspect ratio.'; return; } // Calculations var recordedAR = recordedWidth / recordedHeight; var desqueezedWidth = recordedWidth * squeezeRatio; var desqueezedAR = desqueezedWidth / recordedHeight; var resultHTML = '

Calculation Results:

'; resultHTML += 'Recorded Aspect Ratio (Squeezed): ' + recordedAR.toFixed(3) + ':1'; resultHTML += 'Desqueezed Resolution: ' + Math.round(desqueezedWidth) + ' x ' + Math.round(recordedHeight) + ' pixels'; resultHTML += 'Desqueezed Aspect Ratio: ' + desqueezedAR.toFixed(3) + ':1'; if (hasTargetAR) { var finalCropWidth, finalCropHeight; // Determine optimal crop to achieve targetAspectRatio from the desqueezed image // The desqueezed image is (desqueezedWidth x recordedHeight) // If desqueezedAR is wider than targetAR, we crop the width. // If desqueezedAR is narrower than targetAR, we crop the height. // If desqueezedAR is equal to targetAR, no crop needed. if (desqueezedAR > targetAspectRatio) { // Desqueezed image is wider than target, so we crop the width. finalCropHeight = recordedHeight; finalCropWidth = recordedHeight * targetAspectRatio; } else if (desqueezedAR < targetAspectRatio) { // Desqueezed image is narrower than target, so we crop the height. finalCropWidth = desqueezedWidth; finalCropHeight = desqueezedWidth / targetAspectRatio; } else { // Desqueezed image matches target AR finalCropWidth = desqueezedWidth; finalCropHeight = recordedHeight; } resultHTML += '

Target Aspect Ratio (' + targetAspectRatio.toFixed(2) + ':1) Crop:

'; resultHTML += 'Final Cropped Resolution: ' + Math.round(finalCropWidth) + ' x ' + Math.round(finalCropHeight) + ' pixels'; resultHTML += 'Final Cropped Aspect Ratio: ' + (finalCropWidth / finalCropHeight).toFixed(3) + ':1 (should match target)'; // Add a note if significant cropping occurs if (Math.round(finalCropWidth) < Math.round(desqueezedWidth) || Math.round(finalCropHeight) < Math.round(recordedHeight)) { resultHTML += 'Note: This resolution is achieved by cropping the desqueezed image to fit the desired aspect ratio.'; } } else { resultHTML += 'Select a "Desired Final Aspect Ratio" to see optimal cropping suggestions.'; } document.getElementById('result').innerHTML = resultHTML; } // Initial call to set up custom input visibility document.addEventListener('DOMContentLoaded', function() { toggleCustomInput('squeezeRatioSelect', 'customSqueezeRatioInput'); toggleCustomInput('targetAspectRatioSelect', 'customTargetAspectRatioInput'); }); .calculator-container { background-color: #f9f9f9; border: 1px solid #ddd; padding: 20px; border-radius: 8px; max-width: 600px; margin: 20px auto; font-family: Arial, sans-serif; } .calculator-container h2 { color: #333; text-align: center; margin-bottom: 20px; } .calculator-container p { color: #555; line-height: 1.6; } .calc-input-group { margin-bottom: 15px; } .calc-input-group label { display: block; margin-bottom: 5px; font-weight: bold; color: #444; } .calc-input-group input[type="number"], .calc-input-group select { width: calc(100% – 22px); padding: 10px; border: 1px solid #ccc; border-radius: 4px; box-sizing: border-box; font-size: 16px; } .calc-input-group input[type="number"][style*="display: inline-block"] { width: calc(50% – 15px); /* Adjust width for custom input next to select */ margin-left: 10px; } .calc-input-group select[onchange*="toggleCustomInput"] { width: calc(50% – 10px); /* Adjust width for select next to custom input */ display: inline-block; vertical-align: middle; } button { background-color: #007bff; color: white; padding: 12px 20px; border: none; border-radius: 4px; cursor: pointer; font-size: 18px; width: 100%; margin-top: 10px; } button:hover { background-color: #0056b3; } .calculator-result { margin-top: 20px; padding: 15px; background-color: #e9f7ef; border: 1px solid #d4edda; border-radius: 4px; } .calculator-result h3, .calculator-result h4 { color: #28a745; margin-top: 0; } .calculator-result p { margin-bottom: 5px; color: #333; } .calculator-result .error { color: #dc3545; font-weight: bold; } .calculator-result .note { font-style: italic; color: #6c757d; font-size: 0.9em; }

Understanding Anamorphic Desqueeze

Anamorphic lenses are a staple in cinematic filmmaking, known for their distinctive oval bokeh, lens flares, and the ability to capture a wider field of view on a standard sensor. Unlike spherical lenses, anamorphic lenses optically "squeeze" a wider image horizontally onto the camera's sensor or film frame. This squeezed image then needs to be "desqueezed" in post-production to restore its natural proportions and achieve the desired final aspect ratio.

What is Anamorphic Squeeze?

The "squeeze ratio" refers to how much the lens compresses the image horizontally. Common squeeze ratios include 1.33x, 1.5x, 1.8x, and 2x. A 2x anamorphic lens, for example, will squeeze a scene twice as wide into the sensor's width. When desqueezed, the image will appear twice as wide as it was recorded.

Why Use Anamorphic Lenses?

  • Cinematic Look: Anamorphic lenses produce a unique aesthetic, including characteristic horizontal lens flares and oval-shaped out-of-focus elements (bokeh), which are highly sought after for their cinematic quality.
  • Wider Field of View: By squeezing a wider scene onto a standard sensor, anamorphic lenses allow filmmakers to capture more horizontal information without needing a physically wider sensor or cropping significant vertical resolution.
  • Maximizing Sensor Use: They can utilize more of the sensor's area compared to simply cropping a spherical image to a wide aspect ratio, potentially leading to better image quality and less noise.

How the Calculator Works

This Anamorphic Desqueeze Calculator helps you understand the transformation of your footage from the moment it's recorded to its final display. Here's a breakdown of the inputs and outputs:

  • Recorded Sensor/Frame Width (pixels): This is the horizontal resolution of your camera's sensor or the resolution at which you are recording (e.g., 4096 for DCI 4K, 3840 for UHD 4K).
  • Recorded Sensor/Frame Height (pixels): This is the vertical resolution of your camera's sensor or the resolution at which you are recording (e.g., 2160 for DCI 4K, 2160 for UHD 4K).
  • Anamorphic Squeeze Ratio: Select the squeeze factor of your anamorphic lens (e.g., 1.33x, 1.5x, 1.8x, 2.0x). You can also enter a custom ratio.
  • Desired Final Aspect Ratio: Choose the aspect ratio you want for your final output (e.g., 2.39:1 for Cinemascope, 1.78:1 for 16:9). This helps the calculator determine the optimal cropping.

Understanding the Results

  • Recorded Aspect Ratio (Squeezed): This is the aspect ratio of your footage as it appears directly from the camera, before any desqueezing. It will look vertically stretched.
  • Desqueezed Resolution: This shows the effective width and the original height of your footage after the horizontal squeeze has been removed. The image will now look correctly proportioned but might be extremely wide.
  • Desqueezed Aspect Ratio: This is the true aspect ratio of your footage after desqueezing, before any further cropping.
  • Final Cropped Resolution: If you selected a "Desired Final Aspect Ratio," this is the resolution (width x height) that maximizes the image area while fitting your target aspect ratio. The calculator intelligently determines whether to crop the sides or the top/bottom of the desqueezed image.
  • Final Cropped Aspect Ratio: This confirms that the final cropped image matches your desired aspect ratio.

Example Scenario:

Imagine you're shooting on a camera recording DCI 4K (4096×2160 pixels) with a 2x anamorphic lens, and you want your final output to be Cinemascope (2.39:1).

  • Recorded Width: 4096 pixels
  • Recorded Height: 2160 pixels
  • Squeeze Ratio: 2.0x
  • Desired Final Aspect Ratio: 2.39:1

The calculator would show:

  • Recorded Aspect Ratio (Squeezed): 1.896:1
  • Desqueezed Resolution: 8192 x 2160 pixels
  • Desqueezed Aspect Ratio: 3.796:1
  • Final Cropped Resolution (for 2.39:1): 5162 x 2160 pixels
  • Final Cropped Aspect Ratio: 2.390:1

This means your 2x anamorphic footage, when desqueezed, becomes a very wide 8192×2160 image. To achieve a 2.39:1 aspect ratio, you would crop the sides of this desqueezed image, resulting in a final resolution of approximately 5162×2160 pixels.

Understanding these calculations is crucial for planning your shoot, ensuring you capture enough resolution, and efficiently managing your post-production workflow to achieve the perfect cinematic look.

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