How to Inspect PSD Document Sections in Python

Step 1: Install the Package

git clone https://github.com/aspose-psd-foss/Aspose.PSD-FOSS-for-Python.git
cd Aspose.PSD-FOSS-for-Python
# No packaging manifest is published yet -- run from this folder,
# or add it to PYTHONPATH:
export PYTHONPATH=$PWD:$PYTHONPATH

Step 2: Import Required Classes

from aspose_psd_foss.psdimage import PsdImage

Step 3: Inspect the Header Section

PsdImage.header returns a PsdHeader with the document’s raw structural fields:

image = PsdImage.load("input.psd")

header = image.header
print(f"Size: {header.width}x{header.height}, channels: {header.channels}")
print(f"Bit depth: {header.bit_depth}, raw color mode: {header.color_mode}")
print(f"Is PSB: {header.is_large_document}")

PsdHeader.color_mode returns the raw integer color mode field as stored in the file — use PsdImage.color_mode instead if you need the strongly typed ColorModes enum.

Step 4: Inspect the Color Data Section

PsdImage.color_data_info returns a PsdColorDataInfo summary; kind is a PsdColorDataKind value (NONE, INDEXED_PALETTE, RGB_PAYLOAD, CMYK_PAYLOAD, or RAW_PRESERVED):

if image.has_color_mode_data:
    color_info = image.color_data_info
    print(f"Color data kind: {color_info.kind}, raw bytes: {color_info.raw_data_length}")

    if color_info.indexed_palette is not None:
        print(f"Indexed palette entries: {len(color_info.indexed_palette.entries)}")

Step 5: Inspect the Image Data Section

PsdImage.image_data_info returns a PsdImageDataInfo summary describing how the merged pixel data is encoded:

data_info = image.image_data_info
print(f"Compression: {image.compression}")
print(f"Data kind: {data_info.kind}, uses prediction: {data_info.uses_prediction}")
print(f"Compressed payload length: {data_info.compressed_payload_length}")

data_info.kind is an ImageDataKind value (RAW, RLE, ZIP, or UNKNOWN) describing the merged image data’s own encoding — image.compression reports the same encoding via the separate CompressionMethod enum.

Step 6: Inspect the Image Resources Section

print(f"Has image resources: {image.has_image_resources}")
print(f"Resource count: {image.resource_count}")

for resource in image.resources:
    print(f"Resource ID: {resource.resource_id}, kind: {resource.kind}")

PsdImage.resources returns read-only PsdResourceInfo summaries. The separate PsdImage.image_resources property also has a getter, but its setter raises NotSupportedException in this FOSS build — see Troubleshooting for the full list of read-only setters.