Opening an Image Full Screen

The Chloros Image Viewer provides a dedicated full-screen interface for viewing, analyzing, and manipulating your multispectral images. Whether viewing original images or processed outputs, the Image Viewer offers powerful tools for inspection and analysis.

Accessing the Image Viewer

From the File Browser

The most common way to open an image in the Image Viewer:

  1. Ensure you're in the File Browser tab

  2. Click any image thumbnail in the image grid

  3. The image opens in the main preview area (center of screen)

  4. The image is now loaded and ready for full-screen viewing

Opening the Image Viewer Tab

Once an image is loaded in the preview area:

  1. Click the Image Viewer icon in the left sidebar

  2. The Image Viewer tab opens, displaying the selected image full-screen

  3. Advanced viewing and analysis tools become available in the left sidebar

Image Viewer Interface Overview

Main Display Area

The largest portion of the screen shows your image:

  • Full resolution: Images displayed at native resolution

  • Zoomable: Use controls or mouse wheel to zoom

  • Pannable: Click and drag to move around when zoomed

  • Aspect ratio maintained: Images scale proportionally

Viewing Options

Basic Image Navigation

Browse Through Images

Navigate through your image set using keyboard shortcuts or buttons:

  • Next image: Click → button or press → (Right Arrow) key

  • Previous image: Click ← button or press ← (Left Arrow) key

  • Jump to specific image: Return to File Browser and click desired thumbnail

Zoom Controls

Adjust magnification to inspect image details:

Zoom In:

  • Click + (Plus) button

  • Press + or = key

  • Scroll mouse wheel up

Zoom Out:

  • Click − (Minus) button

  • Press − (Minus) key

  • Scroll mouse wheel down

Fit to Screen:

  • Click ↔ (Fit) button

  • Press 0 (Zero) key

  • Double-click on image

Pan When Zoomed

When zoomed in beyond screen size:

  1. Move mouse cursor over image

  2. Click and hold left mouse button

  3. Drag to move image around

  4. Release to stop panning

Alternative: Use arrow keys to pan in small increments

Pixel Value Inspection

Viewing Pixel Values at Cursor

As you move your mouse cursor over the image, pixel values display in real-time:

Value display location:

  • Floating number and red line in right side index LUT gradient legend

  • When zoomed in further, floating value near cursor and highlighted pixel

  • Shows values for pixel under cursor or highlighted

  • Updates as you move mouse

Image Types You Can View

Original Images (Pre-Processing)

RAW + JPG images from camera:

  • Display RAW data as previewed

  • Show original, uncorrected values

  • Useful for checking image quality before processing

Calibrated Reflectance Images

After processing:

  • Vignette corrected

  • Reflectance calibrated

  • Multi-band TIFF (Red, Green, NIR, etc.)

  • Scientific data ready for analysis

Index Images

NDVI, NDRE, GNDVI, etc. (_NDVI.tif files):

  • Single-band grayscale images

  • Pixel values represent index calculation results

  • Range typically -1 to +1 for normalized indices

  • Can apply color LUTs for visualization

Index and LUT Application

Apply multispectral indices and color Look-Up Tables:

  1. Locate Index/LUT Sandbox in Image Viewer sidebar

  2. Select vegetation index (NDVI, NDRE, etc.)

  3. Select multispectral formula, or create your own custom one (Chloros+ only)

  4. Apply color LUT gradient for visualization

  5. Adjust value ranges and thresholds

See Index/LUT Sandbox for detailed instructions.

Keyboard Shortcuts

Navigation

  • → (Right Arrow): Next image

  • ← (Left Arrow): Previous image

  • Home: First image in list

  • End: Last image in list

Zoom

  • + or =: Zoom in

  • −: Zoom out

  • 0 (Zero): Fit to screen

  • Mouse Wheel: Zoom in/out

View Controls

  • P: Toggle pixel percent mode

  • L: Toggle layers panel

  • Esc: Close full-screen or return to File Browser

Other

  • Ctrl+S: Save current image

  • F: Full-screen mode (if available)

Verifying Index Calculations

Check that indices calculated correctly:

  1. Open NDVI or other index image

  2. Check vegetation areas:

    • NDVI: Should show 0.4-0.9 for healthy plants

    • NDRE: Higher values for vigorous growth

    • GNDVI: Similar to NDVI but chlorophyll-sensitive

  3. Check non-vegetation:

    • Soil: Near 0 or slightly negative

    • Water: Negative values (-0.5 to 0)

Troubleshooting Viewing Issues

Image Won't Open

Possible causes:

  • File corrupted during processing

  • Unsupported file format

  • Insufficient memory for large image

Solutions:

  1. Try opening in external viewer to verify file integrity

  2. Check file format matches expected type

  3. Close other applications to free memory

  4. Try smaller/different image

Black or White Image Display

Possible causes:

  • Value range outside display capability

  • 32-bit float image with unusual values

  • Index calculation error

Solutions:

  1. Check pixel values - if all very low or very high, adjust display range

  2. Try opening in QGIS or similar with auto-range adjustment

  3. Check Debug Log from processing for errors

Pixel Values Seem Wrong

Possible causes:

  • Viewing wrong image (original vs processed)

  • Calibration didn't apply correctly

  • Light sensor data wasn't included in input

  • Percent mode toggled incorrectly

Solutions:

  1. Verify you're viewing processed output (check filename suffix)

  2. Check percent mode button state

  3. Compare with known-good images from same dataset

Next Steps

Now that you can view images full-screen:

For processing workflow, see:

PreviousMultispectral Index FormulasNextImage Layers

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